Program, simulation device, and simulation method

Abstract

To solve the problem that it is difficult to support introduction of a photovoltaic power generation system of an appropriate scale.SOLUTION: A simulation device 1 acquires each of two or more pieces of investment information based on the number of installed panels, acquires a power generation amount of each of two or more unit times during a user period for each of two or more pieces of investment information, acquires the power demand amount of each unit time, acquires difference information of difference between the power generation amount and the demand amount in each unit time of each of two or more pieces of investment information, acquires a purchase power rate by using an insufficient power amount and the purchase power information in each of two or more pieces of investment information and in each unit time, acquires a sell-off power amount by using a surplus power amount and sold power information, acquires an initial investment amount of the number of installed solar panels in each of two or more pieces of investment information, acquires the total expense amount by using the purchase power rate, the sell-off power amount and the initial investment amount in each of two or more pieces of investment information, and acquires and outputs output information based on the total expense amount in each of two or more pieces of investment information.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a simulation device that obtains the total amount for each number of installed solar panels (hereinafter, appropriately referred to as "panels") and outputs information based on the total amount.

Background Art

[0002] Conventionally, there has been a solar power generation system that predicts the power generation amount when introducing a solar power generation system (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the prior art, it has been difficult to support the introduction of a solar power generation system of an appropriate scale.

Means for Solving the Problems

[0005] The simulation device of the first invention includes a price management unit that stores the purchased power information regarding the cost when purchasing power and the sold power information regarding the cost when selling power, an investment acquisition unit that acquires two or more pieces of investment information based on the number of installed solar panels, a power generation amount acquisition unit that, for each of the two or more pieces of investment information, acquires the power generation amounts of two or more unit times included in 24 hours during the usage period when the number of solar panels indicated by the installation number is installed, a demand amount acquisition unit that acquires the demand amounts of power for two or more unit times during the usage period, a difference acquisition unit that, for each of the two or more pieces of investment information and for each of the two or more unit times during the usage period, acquires difference information that is the difference between the power generation amount and the demand amount, a charge acquisition unit that, for each of the two or more pieces of investment information and for each of the two or more unit times during the usage period, when the difference information is a negative number, acquires the purchased power charge using the shortage power amount that is the absolute value of the difference information and the purchased power information, and when the difference information is a positive number, acquires the sold power charge using the surplus power amount that is the difference information and the sold power information, an initial investment amount acquisition unit that, for each of the two or more pieces of investment information, acquires the initial investment amount when the number of solar panels indicated by the installation number is installed, a total amount acquisition unit that, for each of the two or more pieces of investment information, uses the purchased power charge for each of the two or more unit times during the usage period, the sold power charge for each of the two or more unit times during the usage period, and the initial investment amount to acquire the total amount of costs for a predetermined usage period, an output acquisition unit that acquires output information based on the total amount of costs for the usage period for each of the two or more pieces of investment information, and an output unit that outputs the output information.

[0006] With such a configuration, it is possible to support the introduction of a solar power generation system of an appropriate scale.

[0007] Further, the simulation device of the second invention, compared with the first invention, is a simulation device in which the total amount acquisition unit acquires the total amount of costs for each of two or more usage periods, and the output acquisition unit acquires output information that clearly shows the totals for each of two or more usage periods and for each of the two or more pieces of investment information in a comparable manner.

[0008] With such a configuration, it is possible to support the introduction of a solar power generation system of an appropriate scale.

[0009] Further, the simulation device of the third invention includes, for the first or second invention, a charge amount management unit that stores charge amount information regarding the charge amount of the storage battery, and a difference acquisition unit that, for each of two or more pieces of investment information and for each of two or more unit times in the usage period, acquires difference information that is the difference between the power generation amount and the demand amount as initial difference acquisition means, and for each of two or more pieces of investment information and for each of two or more unit times in the usage period, when the difference information acquired by the initial difference acquisition means is a positive number, acquires the charge amount using the charge amount information as charge amount acquisition means, and for each of two or more pieces of investment information, for one or more unit times corresponding to the case where the difference information acquired by the initial difference acquisition means is a negative number, serves as the charge amount and acquires difference information as discharge application means.

[0010] With such a configuration, it is possible to support the introduction of a solar power generation system of an appropriate scale considering the introduction of the storage battery.

[0011] Further, the simulation device of the fourth invention includes, for the third invention, the charge amount information includes information for specifying the secular change of the storage battery capacity, and the charge amount acquisition means acquires the charge amount using the charge amount information for specifying the secular change of the storage battery capacity.

[0012] With such a configuration, it is possible to support the introduction of a solar power generation system of an appropriate scale considering the secular change of the storage battery.

[0013] Further, the simulation device of the fifth invention further includes, for any one of the first to fourth inventions, a power generation amount management unit that stores power generation amount information for specifying the secular change of the power generation amount of the solar panel, and the power generation amount acquisition unit, for each of two or more pieces of investment information, acquires the power generation amount of two or more unit times included in 24 hours in the usage period when the number of solar panels indicated by the number of installed panels is installed, using the power generation amount information.

[0014] With such a configuration, it is possible to support the introduction of a solar power generation system of an appropriate scale.

[0015] Further, in the simulation device of the sixth invention, for any one of the first to fifth inventions, the price management unit stores unit price prediction information regarding the prediction of future electricity unit prices, and the charge acquisition unit, for each of two or more pieces of investment information and for each of two or more unit times during the usage period, when the difference information is a negative number, uses the unit price prediction information to obtain the future electricity unit price when purchasing electricity, and obtains the purchased electricity charge using the electricity unit price and the shortage electricity quantity. When the difference information is a positive number, it is a simulation device that obtains the sold electricity charge using the surplus electricity quantity and the power selling information.

[0016] With such a configuration, it is possible to assist in introducing a solar power generation system of an appropriate scale considering fluctuations in electricity unit prices.

Effect of the Invention

[0017] According to the simulation device of the present invention, it is possible to assist in introducing a solar power generation system of an appropriate scale.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0019] Hereinafter, embodiments of a simulation device and the like will be described with reference to the drawings. In the embodiments, components denoted by the same reference numerals perform the same operations, and thus the description may be omitted again.

[0020] (Embodiment 1) In the present embodiment, a simulation device that calculates the total amount for each number of installed solar panels and outputs information based on the total amount will be described.

[0021] In addition, in the present embodiment, a simulation device that outputs the total amounts for two or more usage periods in a comparable manner will be described. The usage period is a period during which a solar power generation system having one or more solar panels is used.

[0022] In addition, in the present embodiment, a simulation device that obtains the total amount considering the introduction of a storage battery and outputs information based on the total amount will be described.

[0023] In addition, in the present embodiment, a simulation device that obtains the total amount considering the aging of solar panels and storage batteries and outputs information based on the total amount will be described.

[0024] Furthermore, in the present embodiment, a simulation device that obtains the total amount considering the predicted information of future electricity unit prices and outputs information based on the total amount will be described.

[0025] In this specification, that information X is associated with information Y means that information Y can be obtained from information X, or information X can be obtained from information Y, and the method of the association is not limited. Information X and information Y may be linked, may exist in the same buffer, information X may be included in information Y, information Y may be included in information X, and so on.

[0026] Also, in this specification, selecting or determining information Z means obtaining information Z, obtaining a pointer to information Z, obtaining the ID of information Z, setting a flag for information Z, etc., as long as information Z can be accessed.

[0027] Figure 1 is a conceptual diagram of the information system A in this embodiment. The information system A includes a simulation device 1 and one or more terminal devices 2.

[0028] The simulation device 1 is, for example, a cloud server or an ASP server, but its type does not matter. The simulation device 1 may also be a terminal. When the simulation device 1 is a terminal, it may be considered that the terminal device 2 is unnecessary for the information system A, or the simulation device 1 also serves as the terminal device 2.

[0029] The terminal device 2 is a terminal used by the user. The user is, for example, a person who proposes the installation of a solar panel to a customer (e.g., a salesperson), or a person who is considering installing a solar panel. The terminal device 2 is, for example, a so-called personal computer, smartphone, or tablet terminal, but its type does not matter.

[0030] The simulation device 1 and each of the one or more terminal devices 2 can communicate with each other via a network such as the Internet.

[0031] Figure 2 is a block diagram of the information system A in this embodiment. The simulation device 1 includes a storage unit 11, a reception unit 12, a processing unit 13, and an output unit 14.

[0032] The storage unit 11 that constitutes the simulation device 1 includes a price management unit 111, a power generation amount management unit 112, a demand amount management unit 113, and a charge amount management unit 114. The processing unit 13 includes an investment acquisition unit 131, a power generation amount acquisition unit 132, a demand amount acquisition unit 133, a difference acquisition unit 134, a charge acquisition unit 135, an initial investment amount acquisition unit 136, a total amount acquisition unit 137, and an output acquisition unit 138. The difference acquisition unit 134 includes an initial difference acquisition means 1341, a charge amount acquisition means 1342, and a discharge application means 1343.

[0033] The terminal device 2 includes a terminal storage unit 21, a terminal reception unit 22, a terminal processing unit 23, a terminal transmission unit 24, a terminal reception unit 25, and a terminal output unit 26.

[0034] Various types of information are stored in the storage unit 11 that constitutes the simulation device 1. The various types of information are, for example, the power purchase information described later, the power sale information described later, the unit price prediction information described later, the power generation amount information described later, the demand amount information described later, the charge amount information described later, one or more solar panel information, the price of one or two or more types of each storage battery, information specifying candidates for the storage battery (for example, "no storage battery", "storage battery 1", "storage battery 2"), information specifying candidates for the number of panels (for example, "from 1 to 50"), and information specifying candidates for the usage period (for example, "10 years", "15 years", "20 years"). Note that the category of the storage battery may be an AC link, a DC link, or the like.

[0035] The solar panel information is information regarding the solar panel. The solar panel information has one or more panel attribute values. The panel attribute values are, for example, the system capacity (kWh) of one solar panel and the price of one solar panel.

[0036] The power purchase information and the power sale information are stored in the price management unit 111. The unit price prediction information may be stored in the price management unit 111.

[0037] The purchased power information is information regarding the cost when purchasing electric power. The purchased power information is, for example, the purchased power unit price which is the cost per unit quantity when purchasing electric power, information indicating the temporal transition of two or more purchased power unit prices (purchased power unit prices at two or more points in time), the purchased power unit price and the increase rate, or a purchased power arithmetic expression. The purchased power arithmetic expression is an arithmetic expression for calculating the purchased power unit price at a certain time. The purchased power arithmetic expression is, for example, an arithmetic expression using the current purchased power unit price and the elapsed period from the present as parameters.

[0038] The sold power information is information regarding the cost when selling electric power. The sold power information is, for example, the sold power unit price which is the price per unit quantity when selling electric power, information indicating the temporal transition of two or more sold power unit prices (sold power unit prices at two or more points in time), the sold power unit price and the increase rate, or a sold power arithmetic expression. The sold power arithmetic expression is an arithmetic expression for calculating the sold power unit price at a certain time. The sold power arithmetic expression is, for example, an arithmetic expression using the current sold power unit price and the elapsed period from the present as parameters.

[0039] The unit price prediction information is information regarding the prediction of future electric power unit prices. The unit price prediction information is one or both of information regarding the prediction of future purchased power information and information regarding the prediction of future sold power information. The unit price prediction information is, for example, the purchased power unit price or the sold power unit price for each usage period (for example, each year, each month), the increase rate of the purchased power unit price or the increase rate of the sold power unit price (for example, the increase rate for each year, the increase rate for each month).

[0040] In the power generation amount management unit 112, the power generation amount information for each one or two or more target destinations is stored. In the power generation amount management unit 112, for each target destination, one or two or more power generation amount information is stored. The target destination is a place where a solar power generation system has been introduced or a candidate for introduction. It is preferable that the power generation amount information is associated with a target destination identifier for identifying the target destination.

[0041] Power generation amount information is information that specifies the power generation amount in a specific time period. The power generation amount information is, for example, the power generation amount in each of two or more time periods per panel. The power generation amount information is, for example, the power generation amount in each of two or more time periods when using a specific number of panels. The power generation amount information may have information that specifies the annual change in the power generation amount of a single solar panel. The power generation amount information is, for example, information indicating the temporal change in the power generation amount, the basic power generation amount (initial power generation amount) and the attenuation rate in each of two or more time periods of a single solar panel. The attenuation rate is the rate of decrease in the power generation amount due to annual change (for example, every year). When the power generation amount information is the power generation amount in each of two or more time periods when using a specific number of panels, the power generation amount information may be referred to as a power generation amount set.

[0042] Demand management unit 113 stores demand information. The demand information is information that specifies the power demand of a user. The demand information is, for example, information that specifies the power demand in each of two or more unit times. The demand information is, for example, information that specifies the power demand in each of two or more unit times during the usage period. The unit time is, for example, 1 hour, 30 minutes, or 2 hours. The usage period is, for example, 10 years, 15 years, or 20 years. The demand information is the power demand of the user in each unit time (for example, 1 hour) of one year within the usage period (for example, 10 years). When the demand information is information that specifies the power demand in each of two or more unit times, the demand information may be referred to as a demand set.

[0043] The charge amount management unit 114 stores one or more charge amount information. Each of the one or more charge amount information is associated with an identifier of a storage battery.

[0044] The charge amount information is information regarding the charge amount of a storage battery. It is preferable that the charge amount information includes information that specifies the annual change in the storage battery capacity. The charge amount information is, for example, the maximum charge amount, the basic charge amount, and the annual change rate. The charge amount information may have the charge amount stored in the storage battery at a certain point in time.

[0045] The reception unit 12 receives various instructions and information. The various instructions and information are, for example, a start instruction. The start instruction is an instruction to start the simulation described later. The start instruction has, for example, the demand information of the target or the target identifier.

[0046] Here, reception generally means reception from the terminal device 2, but it may also be a concept including reception of information input from input devices such as keyboards, mice, touch panels, etc., and reception of information read from recording media such as optical disks, magnetic disks, semiconductor memories, etc.

[0047] The reception unit 12 receives various instructions and information from the terminal device 2, for example. The reception unit 12 receives various instructions and information from the user, for example.

[0048] The processing unit 13 performs various processes. The various processes are, for example, the processes performed by the investment acquisition unit 131, the power generation amount acquisition unit 132, the demand amount acquisition unit 133, the difference acquisition unit 134, the charge acquisition unit 135, the initial investment amount acquisition unit 136, the total amount acquisition unit 137, or the output acquisition unit 138.

[0049] The investment acquisition unit 131 acquires two or more pieces of investment information based on the number of installed solar panels. The investment information is information indicating candidates for the user's investment in solar panels. The investment information is information based on the candidate number of solar panels the user purchases. The investment information is, for example, the number of solar panels to be installed or the system capacity (kWh). The investment acquisition unit 131 multiplies, for example, the number of solar panels by the capacity per panel (kWh) stored in the storage unit 11 to calculate the system capacity (kWh). The investment acquisition unit 131 acquires, for example, the candidate number of solar panels stored in the storage unit 11.

[0050] For each of two or more pieces of investment information, the power generation amount acquisition unit 132 acquires the power generation amounts for two or more respective unit times included in 24 hours during the usage period when the number of solar panels indicated by the installation number is installed. When the investment information is the system capacity, the installation number that satisfies the system capacity can be acquired using the solar panel information in the storage unit 11.

[0051] For each of two or more pieces of investment information, the power generation amount acquisition unit 132 acquires the power generation amounts for two or more respective unit times included in 24 hours during the usage period when the number of solar panels indicated by the installation number is installed, using the power generation amount information of the power generation amount management unit 112.

[0052] For example, for each of two or more pieces of investment information, the power generation amount acquisition unit 132 acquires the power generation amounts for two or more respective unit times included in 24 hours during the usage period when the number of solar panels indicated by the installation number is installed, from the power generation amount information of the power generation amount management unit 112. For example, for each of two or more pieces of investment information, the power generation amount acquisition unit 132 multiplies the basic power generation amount in the time zone of each unit time of the power generation amount management unit 112 by the attenuation rate to calculate the power generation amount for each unit time.

[0053] The demand amount acquisition unit 133 acquires the power demands for two or more respective unit times during the usage period. Usually, the demand amount acquisition unit 133 acquires the power demands (usually, the unit is "KWh") for two or more respective unit times during the usage period, using the demand amount information of the demand amount management unit 113. For example, the demand amount acquisition unit 133 reads out the power demands for two or more respective unit times during the usage period from the demand amount information of the demand amount management unit 113.

[0054] The difference acquisition unit 134 acquires difference information, which is the difference between the power generation amount and the demand amount, for each of two or more pieces of investment information and for each of two or more respective unit times during the usage period.

[0055] The initial difference acquisition means 1341 acquires difference information, which is the difference between the power generation amount acquired by the power generation amount acquisition unit 132 and the demand amount acquired by the demand amount acquisition unit 133, for each of two or more pieces of investment information and for each of two or more unit times in the usage period. Such difference information is the initial difference information.

[0056] The charge amount acquisition means 1342 acquires the charge amount when the difference information acquired by the initial difference acquisition means 1341 is a positive number for each of two or more pieces of investment information and for each of two or more unit times in the usage period. The charge amount is the amount of electric power that can be charged, and is, for example, a value obtained by adding the difference information acquired by the initial difference acquisition means 1341.

[0057] It is preferable that the charge amount acquisition means 1342 acquires the charge amount using charge amount information that specifies the secular change of the storage battery capacity.

[0058] The discharge application means 1343 appropriates the charge amount acquired by the charge amount acquisition means 1342 for one or more unit times corresponding to the case where the difference information acquired by the initial difference acquisition means 1341 is a negative number for each of two or more pieces of investment information, and acquires difference information. In such a case, the difference information is "0" or "charge amount + difference information acquired by the initial difference acquisition means 1341".

[0059] The charge acquisition unit 135 acquires the purchased power charge using the shortage power amount, which is the absolute value of the difference information, and the power purchase information when the difference information is a negative number for each of two or more pieces of investment information and for each of two or more unit times in the usage period. The charge acquisition unit 135 acquires the sold power charge using the surplus power amount, which is the difference information, and the power sale information when the difference information is a positive number for each of two or more pieces of investment information and for each of two or more unit times in the usage period. The unit time here is, for example, 1 hour, 1 day, but it doesn't matter.

[0060] For each of two or more pieces of investment information and for each of two or more unit times in the usage period, when the difference information is a negative number, it is preferable to obtain the future electricity unit price when purchasing electricity using the unit price prediction information, and obtain the purchased electricity charge using the electricity unit price and the insufficient electricity quantity. For each of two or more pieces of investment information and for each of two or more unit times in the usage period, when the difference information is a positive number, it may also be possible to obtain the future electricity unit price when selling electricity using the unit price prediction information, and obtain the sold electricity charge using the electricity unit price and the surplus electricity quantity.

[0061] The initial investment amount acquisition unit 136 acquires the initial investment amount when installing the number of solar panels for each of two or more pieces of investment information. The initial investment amount acquisition unit 136 usually acquires the initial investment amount according to the number of installations. The initial investment amount acquisition unit 136 multiplies, for example, the price of one solar panel included in the solar panel information in the storage unit 11 by the number of installations to acquire the initial investment amount. When using a storage battery, the initial investment amount acquisition unit 136 adds the price of the storage battery to acquire the initial investment amount. Note that the price of one or two or more storage batteries is stored in the storage unit 11.

[0062] The total amount acquisition unit 137 acquires the total amount of expenses for a predetermined usage period using the purchased electricity charge for each of two or more unit times in the usage period, the sold electricity charge for each of two or more unit times in the usage period, and the initial investment amount for each of two or more pieces of investment information. The usage period is the period for performing the simulation of the total amount. The usage period is, for example, 10 years, 15 years, or 20 years.

[0063] It is preferable for the total amount acquisition unit 137 to acquire the total amount of expenses for each of two or more usage periods.

[0064] It is preferable for the total amount acquisition unit 137 to acquire the total amount of expenses for each of two or more usage periods for each of one or two or more storage battery candidates.

[0065] The output acquisition unit 138 acquires output information based on the total amount of expenses for the usage period for each of two or more pieces of investment information.

[0066] It is preferable that the output acquisition unit 138 acquires output information that clearly shows, in a comparable manner, the total amount for each of two or more usage periods and for each of two or more investment information. The output information clearly shown in a comparable manner is, for example, a graph for each of two or more usage periods and a graph for each of two or more investment information. Such a graph is, for example, a two-dimensional graph having an axis of system capacity or the number of installed units and an axis of the total payment amount.

[0067] The output unit 14 outputs the output information acquired by the output acquisition unit 138. The output here is, for example, transmission to the terminal device 2, but is a concept including display on a display, projection using a projector, printing by a printer, storage in a recording medium, delivery of a processing result to another processing device or another program, etc.

[0068] Various types of information are stored in the terminal storage unit 21 that constitutes the terminal device 2. The various types of information are, for example, the demand information of the user.

[0069] The terminal reception unit 22 receives various types of information, instructions, etc. The various types of information, instructions, etc. are, for example, a start instruction. The input means for the various types of information, instructions, etc. can be anything, such as a touch panel, keyboard, mouse, menu screen, etc.

[0070] The terminal processing unit 23 performs various types of processing. The various types of processing are, for example, processing that converts the received information, instructions, etc. into information, instructions, etc. having a structure for transmission. The various types of processing are, for example, processing that converts the received information into information having a structure for output.

[0071] The terminal transmission unit 24 transmits various types of information, instructions, etc. to the simulation device 1. The various types of information, instructions, etc. are, for example, demand information, start instruction.

[0072] The terminal reception unit 25 receives various types of information from the simulation device 1. The various types of information are, for example, output information.

[0073] The terminal output unit 26 outputs various types of information. The various types of information are, for example, output information.

[0074] For the storage unit 11, the price management unit 111, the power generation amount management unit 112, the demand amount management unit 113, the charging amount management unit 114, and the terminal storage unit 21, a non-volatile recording medium is preferable, but a volatile recording medium can also be used.

[0075] The process of storing information in the storage unit 11 or the like is not limited. For example, information may be stored in the storage unit 11 or the like via a recording medium, information transmitted via a communication line or the like may be stored in the storage unit 11 or the like, or information input via an input device may be stored in the storage unit 11 or the like.

[0076] The reception unit 12 is preferably realized by wireless or wired communication means, but may also be realized by means of receiving broadcasts, device drivers for input means such as touch panels and keyboards, control software for menu screens, etc.

[0077] The processing unit 13, the investment acquisition unit 131, the power generation amount acquisition unit 132, the demand amount acquisition unit 133, the difference acquisition unit 134, the charge acquisition unit 135, the initial investment amount acquisition unit 136, the total amount acquisition unit 137, the output acquisition unit 138, the initial difference acquisition means 1341, the charging amount acquisition means 1342, the discharge application means 1343, and the terminal processing unit 23 can usually be realized from a processor, a memory, etc. The processing procedures of the processing unit 13 or the like are usually realized by software, and the software is recorded on a recording medium such as a ROM. However, it may also be realized by hardware (dedicated circuit). Note that the processor is a CPU, MPU, GPU, etc., and its type is not limited.

[0078] The output unit 14 is preferably realized by wireless or wired communication means, but may also be realized by driver software for output devices such as displays and speakers, or by driver software for output devices and output devices.

[0079] The terminal reception unit 22 can be implemented by a device driver for an input means such as a touch panel or a keyboard, control software for a menu screen, or the like.

[0080] The terminal transmission unit 24 is usually implemented by wireless or wired communication means, but may also be implemented by a broadcast means.

[0081] The terminal reception unit 25 is usually implemented by wireless or wired communication means, but may also be implemented by a means for receiving a broadcast.

[0082] The terminal output unit 26 may or may not be considered to include an output device such as a display or a speaker. The terminal output unit 26 can be implemented by driver software for the output device or by the driver software for the output device and the output device or the like.

[0083] Next, an operation example of the simulation device 1 will be described using the flowchart of FIG. 3.

[0084] (Step S301) The reception unit 12 determines whether or not a start instruction has been received. If a start instruction has been received, the process proceeds to step S302, and if a start instruction has not been received, the process returns to step S301.

[0085] (Step S302) The demand amount acquisition unit 133 acquires the demand amount set included in the start instruction or acquires the demand amount set corresponding to the start instruction from the demand amount management unit 113.

[0086] (Step S303) The processing unit 13 substitutes 1 for the counter i.

[0087] (Step S304) The processing unit 13 determines whether or not there is a candidate for the i-th storage battery. If there is a candidate for the i-th storage battery, the process proceeds to step S305, and if there is no candidate, the process proceeds to step S322. Note that the candidates for the storage battery are determined in advance and are, for example, four types: "no storage battery", "100 kWh", "150 kWh", and "200 kWh", but it does not matter.

[0088] (Step S305) The processing unit 13 assigns 1 to the counter j.

[0089] (Step S306) The processing unit 13 determines whether there is a candidate for the j-th usage period. If there is a candidate for the j-th usage period, it proceeds to Step S307; if not, it proceeds to Step S321. Note that the candidates for the usage period are determined in advance. For example, there are three candidates: "10 years", "15 years", and "20 years", but it doesn't matter.

[0090] (Step S307) The processing unit 13 assigns 1 to the counter k.

[0091] (Step S308) The processing unit 13 determines whether there is a candidate for the k-th number of panels. If there is a candidate for the k-th number of panels, it proceeds to Step S309; if not, it proceeds to Step S320. Note that the candidates for the number of panels are determined in advance. For example, they are from "1 panel" to "n panels" (n is a natural number greater than or equal to 2), but it doesn't matter. Each candidate for the number of panels corresponds to a candidate for the system capacity.

[0092] (Step S309) The investment acquisition unit 131 acquires investment information (for example, here, the system capacity (kWh)) based on the k-th candidate for the number of panels. The investment acquisition unit 131 acquires the investment information according to the arithmetic formula "System capacity = k-th number of panels × System capacity of one panel".

[0093] (Step S310) The initial investment amount acquisition unit 136 acquires the initial investment amount when installing the number of solar panels indicated by the installation quantity. The initial investment amount acquisition unit 136 acquires the initial investment amount, for example, according to the arithmetic formula "Cost of the number of installed solar panels + Price of the battery". Note that when not using a battery, the price of the battery is 0.

[0094] (Step S311) The processing unit 13 assigns 1 to the counter l.

[0095] (Step S312) The processing unit 13 determines whether the l-th unit time exists within the j-th usage period. If the l-th unit time exists, it proceeds to step S313; if not, it proceeds to step S318. Note that the n-th unit time and the (n + 1)-th unit time are temporally continuous.

[0096] (Step S313) The processing unit 13 acquires the time zone information that specifies the time zone of the l-th unit time. The time zone information is, for example, "from 12:00 to 13:00 on December 20th".

[0097] (Step S314) The power generation amount acquisition unit 132 acquires, using the power generation amount information of the power generation amount management unit 112, the power generation amount in the time zone indicated by the time zone information when the k-th number of panels is used. The power generation amount acquisition unit 132, for example, reads the said power generation amount from the power generation amount management unit 112.

[0098] (Step S315) The demand amount acquisition unit 133 acquires the demand amount in the time zone specified by the time zone information from the demand amount set.

[0099] (Step S316) The difference acquisition unit 134 acquires the difference information in the time zone specified by the time zone information. An example of such difference acquisition processing will be described using the flowchart of FIG. 4.

[0100] (Step S317) The processing unit 13 increments the counter l by 1 and returns to step S312.

[0101] (Step S318) The total amount acquisition unit 137 acquires the total amount when the k-th number of panels is installed under the conditions of the i-th storage battery during the j-th usage period. An example of such total amount acquisition processing will be described using the flowchart of FIG. 5.

[0102] (Step S319) The processing unit 13 increments the counter k by 1 and returns to step S308.

[0103] (Step S320) The processing unit 13 increments the counter j by 1. Return to step S306.

[0104] (Step S321) The processing unit 13 increments the counter i by 1. Return to step S304.

[0105] (Step S322) The output acquisition unit 138 acquires output information. An example of such output acquisition processing will be described using the flowchart of FIG. 6.

[0106] (Step S323) The output unit 14 outputs the output information acquired in step S322. Return to step S301.

[0107] Note that in the flowchart of FIG. 3, the processing ends due to a power-off or a processing end interrupt.

[0108] Next, an example of the difference acquisition processing in step S316 will be described using the flowchart of FIG. 4.

[0109] (Step S401) The initial difference acquisition means 1341 calculates the difference information by "difference information = power generation amount - demand amount".

[0110] (Step S402) The difference acquisition unit 134 determines whether the storage battery is used or not. If the storage battery is used, go to step S403; if not, return to the upper-level processing.

[0111] (Step S403) The difference acquisition unit 134 determines whether the difference information acquired in step S401 is greater than 0. If the difference information is greater than 0, go to step S404; if the difference information is 0 or less, go to step S406.

[0112] (Step S404) The charge amount acquisition means 1342 adds the difference information to the variable "charge amount". Note that the initial value of the variable "charge amount" is "0".

[0113] (Step S405) The difference acquisition unit 134 sets the difference information to "0". Return to the upper-level process. Here, when the difference acquisition unit 134 adds the difference information to the variable "charge amount", if the value of the variable "charge amount" exceeds the maximum capacity of the storage battery, the value of the variable "charge amount" is set to the maximum capacity of the storage battery, and the value added as "charge amount" is subtracted from the difference information to obtain new difference information.

[0114] (Step S406) The difference acquisition unit 134 determines whether the difference information acquired in Step S401 is less than 0. If the difference information is less than 0, go to Step S407; if the difference information is not less than 0, return to the upper-level process.

[0115] (Step S407) The discharge application means 1343 determines whether the value of the variable "charge amount" is greater than 0. If it is greater than 0, go to Step S408; if it is 0 or less, return to the upper-level process.

[0116] (Step S408) The discharge application means 1343 determines whether the absolute value of the difference information is less than or equal to the "charge amount". If the absolute value of the difference information is less than or equal to the "charge amount", go to Step S409; if the absolute value of the difference information is greater than the "charge amount", go to Step S411.

[0117] (Step S409) The discharge application means 1343 sets the difference information to "0".

[0118] (Step S410) The discharge application means 1343 adds the difference information (negative value) to the "charge amount". Return to the upper-level process.

[0119] (Step S411) The discharge application means 1343 adds the "charge amount" to the difference information.

[0120] (Step S412) The discharge application means 1343 sets the "charge amount" to "0". Return to the upper-level process.

[0121] Note that in the flowchart of FIG. 4, it is preferable to calculate the stored power in consideration of the charge and discharge losses in the storage battery.

[0122] Also, in the flowchart of FIG. 4, when the upper limit value of the charge amount of the storage battery is exceeded, it is preferable to handle the excess power as being sold.

[0123] Next, an example of the total amount acquisition process in step S318 will be described with reference to the flowchart of FIG. 5.

[0124] (Step S501) The total amount acquisition unit 137 assigns 1 to the counter i.

[0125] (Step S502) The total amount acquisition unit 137 determines whether the i-th unit time exists. If the i-th unit time exists, it proceeds to step S503; if it does not exist, it proceeds to step S513.

[0126] (Step S503) The total amount acquisition unit 137 acquires the difference information corresponding to the i-th unit time.

[0127] (Step S504) The total amount acquisition unit 137 determines whether the difference information acquired in step S503 is less than 0. If the difference information is less than 0, it proceeds to step S505; if the difference information is not less than 0, it proceeds to step S508.

[0128] (Step S505) The total amount acquisition unit 137 acquires the power purchase information for the i-th unit time.

[0129] (Step S506) The total amount acquisition unit 137 multiplies the absolute value of the difference information acquired in step S503 by the power purchase information acquired in step S505 to obtain the power purchase fee for the i-th unit time.

[0130] (Step S507) The total amount acquisition unit 137 adds the power purchase fee acquired in step S506 to the variable "total power purchase fee". It proceeds to step S512. Note that the initial value of the variable "total power purchase fee" is 0.

[0131] (Step S508) The total amount acquisition unit 137 determines whether the difference information acquired in step S503 is greater than 0. If the difference information is greater than 0, it proceeds to step S509, and if the difference information is 0, it proceeds to step S512.

[0132] (Step S509) The total amount acquisition unit 137 acquires the power selling information for the i-th unit time.

[0133] (Step S510) The total amount acquisition unit 137 multiplies the difference information acquired in step S503 by the power selling information acquired in step S509 to obtain the power selling fee for the i-th unit time.

[0134] (Step S511) The total amount acquisition unit 137 adds the power selling fee acquired in step S510 to the variable "total power selling fee". Note that the initial value of the variable "total power selling fee" is 0.

[0135] (Step S512) The total amount acquisition unit 137 increments the counter i by 1. It returns to step S502.

[0136] (Step S513) The total amount acquisition unit 137 acquires the initial investment amount.

[0137] (Step S514) The total amount acquisition unit 137 obtains the total amount according to the arithmetic formula "total amount = initial investment amount + total power purchase fee - total power selling fee". It returns to the upper-level process.

[0138] Next, an example of the output acquisition process in step S322 will be described using the flowchart in FIG. 6.

[0139] (Step S601) The output acquisition unit 138 assigns 1 to the counter i.

[0140] (Step S602) The output acquisition unit 138 determines whether there is a candidate for the i-th storage battery. If there is a candidate for the i-th storage battery, if not, it returns to the upper-level process. Note that the candidates for the storage battery are predetermined. For example, there are four candidates: "no storage battery", "100 kWh", "150 kWh", and "200 kWh", but it doesn't matter.

[0141] (Step S603) The output acquisition unit 138 assigns 1 to the counter j.

[0142] (Step S604) The output acquisition unit 138 determines whether there is a j-th usage period. If there is a j-th usage period, it proceeds to Step S605; if not, it proceeds to Step S608.

[0143] (Step S605) For the candidate of the i-th storage battery, the output acquisition unit 138 constructs a graph with the investment information corresponding to the j-th usage period and the total amount as axes. Note that the graph can be, for example, a line graph or the like, but it doesn't matter.

[0144] (Step S606) The output acquisition unit 138 places the graph obtained in Step S605 inside the frame of the graph with the investment information and the total amount as axes.

[0145] (Step S607) The output acquisition unit 138 increments the counter j by 1 and returns to Step S604.

[0146] (Step S608) The output acquisition unit 138 increments the counter i by 1 and returns to Step S602.

[0147] Hereinafter, a specific operation example of the simulation device 1 in the present embodiment will be described.

[0148] Now, assume that the storage unit 11 of the simulation device 1 stores solar panel information "<Price> PC <System capacity> SC (kWh)". The price "PC" is the cost per solar panel. The system capacity "SC" is the system capacity (kWh) per solar panel.

[0149] The price management unit 111 stores the purchased electricity unit price (yen / kWh) "B1" and the sold electricity unit price "S1". The price management unit 111 stores the increase rate "U1" of the purchased electricity unit price. The price management unit 111 stores the price "SB1" of the first candidate battery 1 and the price "SB2" of the second candidate battery 2.

[0150] The purchased electricity unit price is an example of the purchased electricity information regarding the cost when purchasing electricity. The current purchased electricity unit price "B1" is the electricity unit price when purchasing from the grid (power company). Also, the purchased electricity unit price "B1" is, for example, the unit price obtained from the power company's tariff plan. The increase rate is an example of the unit price prediction information. The increase rate "U1" is, for example, the inflation rate (e.g., "0.02" (2%)) in a unit period (e.g., 1 year). The sold electricity unit price "S1" is the electricity unit price when selling to the grid. Also, the sold electricity unit price "S1" is also, for example, the unit price obtained from the power company's tariff plan.

[0151] The power generation amount management unit 112 stores, for example, the power generation amount (kWh) per panel per hour for each day of 365 days in a year. Such power generation amount (kWh) can be calculated by known techniques (for example, "i-Pals" (Internet URL "https: / / i-pals.nippon-control-system.co.jp / ")). Further, it is preferable that such calculation is a calculation considering the way of shading, the conversion efficiency of the power conditioner, the aging deterioration of the panel, and the like. Also, the power generation amount (kWh) per hour for 365 days is (power generation amount from 0:00 to 1:00 on January 1, power generation amount from 1:00 to 2:00 on January 1, ···, power generation amount from 0:00 to 1:00 on January 2, ···, power generation amount from 12:00 to 13:00 on December 31, power generation amount from 13:00 to 14:00 on December 31, ···, power generation amount from 23:00 to 24:00 on December 31) = (C 010101 , C 010102 , ···, C 010201 , ···, C 123113 , C 123114 , ···, C 123124 ).

[0152] The demand amount management unit 113 stores, in pairs with the target identifier, the power consumption of facilities such as the target (the installation destination of the solar power generation system) of one or more simulations. Such power consumption is assumed to be the demand amount (kWh) per hour during 365 days. Such power consumption is, for example, information obtained from the power company. The demand amount (kWh) per hour during 365 days for the target "T1" is (demand amount from 0:00 to 1:00 on January 1, demand amount from 1:00 to 2:00 on January 1, ···, demand amount from 0:00 to 1:00 on January 2, ···, demand amount from 12:00 to 13:00 on December 31, demand amount from 13:00 to 14:00 on December 31, ···, demand amount from 23:00 to 24:00 on December 31) = (D 010101 , D 010102 , ···, D 010201 , ···, D 123113 , D 123114 , ···, D 123124 ).

[0153] The charge management unit 114 stores the charge information of each of one or more storage batteries. The charge information of storage battery 1 is, for example, "<charge amount>CA1<annual change rate>AR1". Also, the charge information of storage battery 2 is, for example, "<charge amount>CA2<annual change rate>AR2". The charge amounts "CA1" and "CA2" are the initial maximum charge amounts of the respective storage batteries, which are "100 kWh" and "150 kWh" respectively here. The annual change rates "AR1" and "AR2" are, for example, the decrease rates of the maximum charge amount of each storage battery in one year, and are, for example, "0.01" and "0.02".

[0154] In the above situation, it is assumed that a salesperson who explains the appropriate investment in solar panels to the target "T1" inputs a start instruction including the target identifier "T1" into the terminal device 2. The terminal device 2 receives the start instruction and transmits the start instruction to the simulation device 1.

[0155] Next, the reception unit 12 of the simulation device 1 receives a start instruction including the target identifier "T1".

[0156] Next, the demand acquisition unit 133 acquires a demand set (D 010101 , D 010102 , ···, D 010201 , ···, D 123113 , D 123114 , ···, D 123124 ) corresponding to the target identifier "T1" included in the start instruction from the demand management unit 113.

[0157] Next, the processing unit 13 obtains the total amount paid by the target for each candidate of the storage battery candidates "no storage battery", "storage battery 1", and "storage battery 2" for each candidate of the usage period of "10 years", "15 years", and "20 years" and for each candidate of the number of panels (candidate of the total system capacity) as follows.

[0158] That is, the investment acquisition unit 131 obtains the prices of the storage batteries "0", "SB1", and "SB2" corresponding to each of the storage battery candidates "no storage battery", "storage battery 1", and "storage battery 2" for each storage battery candidate.

[0159] In addition, the investment acquisition unit 131 acquires the system capacity (kWh) "K × SC" based on the candidate number of panels (for example, K pieces).

[0160] In addition, the initial investment amount acquisition unit 136 acquires the initial investment amount "K × PC + price of the storage battery" when installing the number of installed solar panels (for example, K pieces).

[0161] In addition, the power generation amount acquisition unit 132 multiplies the power generation amount information, which is the power generation amount (kWh) per hour for 365 days in the power generation amount management unit 112, by K to obtain the power generation amount for each time period every hour for 365 days when using K solar panels.

[0162] In addition, the demand acquisition unit 133 obtains the demand for each time period every hour for 365 days from the demand set (D 010101 , D 010102 , ···, D 010201 , ···, D 123113 , D 123114 , ···, D 123124 ).

[0163] Next, for each candidate of the storage battery, for each candidate of the usage period of "10 years", "15 years", and "20 years", and for each candidate of the number of panels, the difference acquisition unit 134 uses the demand and power generation amount for each time period every hour for 365 days to obtain the difference information for each time period by the process described using the flowchart of FIG. 4.

[0164] Next, for each candidate of the storage battery, for each candidate of the usage period of "10 years", "15 years", and "20 years", and for each candidate of the number of panels, the total amount acquisition unit 137 obtains the total amount when installing the panels of the number of panels (K pieces) by the process described using the flowchart of FIG. 5, associates the total amount with the candidate of the storage battery, the candidate of the usage period, and the candidate of the number of panels, and accumulates the total amount. The set of the accumulated total amounts is shown in FIG. 7. In FIG. 7, the total amount management table for managing the total amount exists for each candidate of the storage battery. In FIG. 7, when using the storage battery 1 (charge amount = 100 kWh) and the usage period is "10 years", the total amount when using 1 panel is "x 11」, and the total amount when using n panels is "x". 1n 」.

[0165] Next, the output acquisition unit 138 acquires output information. The output information is, for example, a graph for each candidate of the storage battery. Here, the horizontal axis of the graph is the system capacity corresponding to the number of panels, and the vertical axis is the total amount here. Further, the graph is a line graph for each candidate of the usage period here. Such an output example is shown in FIG. 8. FIG. 8 shows the case where no storage battery is used. In FIG. 8, 801 is a graph of the usage period "10 years", 802 is a graph of the usage period "15 years", and 803 is a graph of the usage period "20 years". According to FIG. 8, the salesperson considers that the usage period of "20 years" is appropriate and proposes the installation of a solar panel with a system capacity of "132.84 (kWh) = 5 pieces" shown at 804.

[0166] As described above, according to the present embodiment, it is possible to support the introduction of a solar power generation system of an appropriate scale. More specifically, according to the present embodiment, it is possible to propose an appropriate system capacity or an appropriate number of panels in consideration of the total amount of payment for the target destination for introducing the solar power generation system.

[0167] In addition, according to the present embodiment, it is possible to support the introduction of a solar power generation system of an appropriate scale when considering the introduction of a storage battery.

[0168] In addition, according to the present embodiment, it is possible to support the introduction of a solar power generation system of an appropriate scale when considering the aging change of the storage battery.

[0169] In addition, according to the present embodiment, it is possible to support the introduction of a solar power generation system of an appropriate scale when considering the fluctuation of the electricity unit price.

[0170] Note that the processing in this embodiment may be implemented by software. Then, this software may be distributed by software download or the like. Also, this software may be recorded on a recording medium such as a CD-ROM and distributed. Note that this also applies to other embodiments in this specification. The software that realizes the simulation device 1 in this embodiment is a program as follows. That is, this program enables a computer that can access a price management unit storing purchase power information regarding the cost when purchasing power and sell power information regarding the cost when selling power, to an investment acquisition unit that acquires two or more pieces of investment information based on the number of installed solar panels, a power generation amount acquisition unit that acquires the power generation amounts of two or more unit times included in 24 hours during the usage period when the number of solar panels indicated by the installation number is installed for each of the two or more pieces of investment information, a demand amount acquisition unit that acquires the demand amounts of power for the two or more unit times during the usage period, a difference acquisition unit that acquires difference information, which is the difference between the power generation amount and the demand amount, for each of the two or more pieces of investment information and for each of the two or more unit times during the usage period, a charge acquisition unit that, when the difference information is a negative number for each of the two or more pieces of investment information and for each of the two or more unit times during the usage period, acquires the purchased power charge using the absolute value of the difference information, which is the insufficient power amount, and the purchase power information, and when the difference information is a positive number, acquires the sold power charge using the difference information, which is the surplus power amount, and the sell power information, an initial investment amount acquisition unit that acquires the initial investment amount when the number of solar panels indicated by the installation number is installed for each of the two or more pieces of investment information, a total amount acquisition unit that acquires the total amount of costs for a predetermined usage period using the purchased power charge for each of the two or more unit times during the usage period, the sold power charge for each of the two or more unit times during the usage period, and the initial investment amount for each of the two or more pieces of investment information, an output acquisition unit that acquires output information based on the total amount of costs for the usage period for each of the two or more pieces of investment information, and a program for functioning as an output unit that outputs the output information.

[0171] Further, FIG. 9 shows the appearance of a computer that executes the program described in this specification to implement the simulation device 1 and the like of the various embodiments described above. The above-described embodiments can be implemented by computer hardware and a computer program executed thereon. FIG. 9 is an overview diagram of this computer system 300, and FIG. 10 is a block diagram of the system 300.

[0172] In FIG. 9, the computer system 300 includes a computer 301 including a CD-ROM drive, a keyboard 302, a mouse 303, and a monitor 304.

[0173] In FIG. 10, in addition to the CD-ROM drive 3012, the computer 301 includes an MPU 3013, a bus 3014 connected to the CD-ROM drive 3012 and the like, a ROM 3015 for storing programs such as a boot-up program, and is connected to the MPU 3013 and temporarily stores instructions of an application program. And a RAM 3016 for providing a temporary storage space, and a hard disk 3017 for storing an application program, a system program, and data. Here, although not shown, the computer 301 may further include a network card for providing a connection to a LAN.

[0174] A program for causing the computer system 300 to execute the functions of the simulation device 1 and the like of the above-described embodiments may be stored in a CD-ROM 3101, inserted into the CD-ROM drive 3012, and further transferred to the hard disk 3017. Alternatively, the program may be transmitted to the computer 301 via a network (not shown) and stored in the hard disk 3017. The program is loaded into the RAM 3016 during execution. The program may be loaded directly from the CD-ROM 3101 or the network.

[0175] The program does not necessarily include an operating system (OS) that causes the computer 301 to execute the functions of the simulation device 1 or the like in the above-described embodiments, or a third-party program or the like. The program only needs to include only the part of the instructions that calls appropriate functions (modules) in a controlled manner so as to obtain a desired result. How the computer system 300 operates is well known, and a detailed description thereof will be omitted.

[0176] Also, the computer that executes the above program may be singular or plural. That is, centralized processing may be performed, or distributed processing may be performed.

[0177] Also, in each of the above embodiments, it goes without saying that two or more communication means existing in one device may be physically realized by one medium.

[0178] Also, in each of the above embodiments, each process may be realized by being centrally processed by a single device, or may be realized by being distributedly processed by a plurality of devices.

[0179] Needless to say, the present invention is not limited to the above embodiments, and various modifications are possible, and those are also included in the scope of the present invention.

Industrial Applicability

[0180] As described above, the simulation device 1 according to the present invention has an effect of being able to support the introduction of a solar power generation system of an appropriate scale, and is useful as a server or the like that proposes a solar power generation system of an appropriate scale.

Explanation of Signs

[0181] A Information system 1 Simulation device 2 Terminal device 11 Storage unit 12 Reception unit 13 Processing Unit 14 Output Unit 21 Terminal Storage Unit 22 Terminal Reception Unit 23 Terminal Processing Unit 24 Terminal Transmission Unit 25 Terminal Reception Unit 26 Terminal Output Unit 111 Price Management Unit 112 Power Generation Quantity Management Unit 113 Demand Quantity Management Unit 114 Charge Quantity Management Unit 131 Investment Acquisition Unit 132 Power Generation Quantity Acquisition Unit 133 Demand Quantity Acquisition Unit 134 Difference Acquisition Unit 135 Charge Acquisition Unit 136 Initial Investment Amount Acquisition Unit 137 Total Amount Acquisition Unit 138 Output Acquisition Unit 1341 Initial Difference Acquisition Means 1342 Charge Quantity Acquisition Means 1343 Discharge Application Means

Claims

1. A computer that can access a price management unit storing buy electricity price information related to the cost when purchasing electricity and sell electricity price information related to the cost when selling electricity, an investment acquisition unit that acquires two or more pieces of investment information based on the number of installed solar panels, for each of the two or more pieces of investment information, a power generation amount acquisition unit that acquires the power generation amounts of two or more unit times included in 24 hours during the usage period when the number of solar panels indicated by the number of installed panels is installed, a demand amount acquisition unit that acquires the demand amounts of electricity for the two or more unit times during the usage period, a difference acquisition unit that acquires difference information, which is the difference between the power generation amount and the demand amount, for each of the two or more pieces of investment information and for each of the two or more unit times during the usage period, for each of the two or more pieces of investment information and for each of the two or more unit times during the usage period, when the difference information is a negative number, a power purchase charge is acquired using the shortage power amount, which is the absolute value of the difference information, and the buy electricity price information, and when the difference information is a positive number, a power sale charge is acquired using the surplus power amount, which is the difference information, and the sell electricity price information, an initial investment amount acquisition unit that acquires the initial investment amount when the number of solar panels indicated by the number of installed panels is installed for each of the two or more pieces of investment information, a total amount acquisition unit that acquires the total amount of costs for a predetermined usage period using the power purchase charges for the two or more unit times during the usage period, the power sale charges for the two or more unit times during the usage period, and the initial investment amount for each of the two or more pieces of investment information, an output acquisition unit that acquires output information based on the total amount of costs for the usage period for each of the two or more pieces of investment information, A program for causing the computer to function as an output unit that outputs the output information.

2. The total amount acquisition unit acquires the total amount of costs for each usage period for two or more usage periods, The output acquisition unit The program according to claim 1 for causing the computer to function, wherein output information that clearly shows the total amounts for each of the two or more usage periods and for each of the two or more pieces of investment information in a comparable manner is acquired.

3. The program according to claim 1 or claim 2 that can access a charge amount management unit storing charge amount information related to the charge amount of a storage battery, The difference acquisition unit Initial difference acquisition means for acquiring difference information, which is the difference between the power generation amount and the demand amount, for each of the two or more pieces of investment information and for each of the two or more unit times during the usage period; Charge amount acquisition means for acquiring a charge amount using the charge amount information when the difference information acquired by the initial difference acquisition means is a positive number for each of the two or more pieces of investment information and for each of the two or more unit times during the usage period; Discharge application means for appropriating the charge amount and acquiring difference information for each of one or more unit times corresponding to the case where the difference information acquired by the initial difference acquisition means is a negative number for each of the two or more pieces of investment information. The program according to claim 1 or claim 2 for causing the computer to function.

4. The charge amount information includes information specifying the secular change of the storage battery capacity. The charge amount acquisition means The program according to claim 3 for causing the computer to function, wherein the charge amount is acquired using the charge amount information specifying the secular change of the storage battery capacity.

5. Further comprising a power generation amount management unit storing power generation amount information specifying the secular change of the power generation amount of the solar panel. The power generation amount acquisition unit The program according to claim 1 for causing the computer to function, wherein for each of the two or more pieces of investment information, the power generation amount for each of the two or more unit times included in 24 hours during the usage period when the number of solar panels indicated by the installation number is installed is acquired using the power generation amount information.

6. In the price management unit Unit price prediction information regarding the prediction of the future electricity unit price is stored. The charge amount acquisition unit The program according to claim 1 for causing the computer to function, wherein for each of the two or more pieces of investment information and for each of the two or more unit times during the usage period, when the difference information is a negative number, the future electricity unit price when purchasing electricity is acquired using the unit price prediction information, and the purchased electricity charge is acquired using the electricity unit price and the shortage power amount. When the difference information is a positive number, the sold electricity charge is acquired using the surplus power amount and the sold electricity information.

7. A price management unit storing purchase electricity information regarding the cost when purchasing electricity and sold electricity information regarding the cost when selling electricity; An investment acquisition unit for acquiring two or more pieces of investment information based on the number of installed solar panels. For each of the two or more pieces of investment information, a power generation amount acquisition unit that acquires the power generation amounts for two or more unit times included in 24 hours during the usage period when the number of solar panels indicated by the installation number is installed; A demand amount acquisition unit that acquires the demand amounts of power for the two or more unit times during the usage period; A difference acquisition unit that acquires difference information, which is the difference between the power generation amount and the demand amount, for each of the two or more pieces of investment information and for each of the two or more unit times during the usage period; For each of the two or more pieces of investment information and for each of the two or more unit times during the usage period, when the difference information is a negative number, a power purchase fee is acquired using the shortage power amount, which is the absolute value of the difference information, and the power purchase price information, and when the difference information is a positive number, a power sale fee is acquired using the surplus power amount, which is the difference information, and the power sale price information; a fee acquisition unit; An initial investment amount acquisition unit that acquires the initial investment amount when the number of solar panels indicated by the installation number is installed for each of the two or more pieces of investment information; For each of the two or more pieces of investment information, a total amount acquisition unit that acquires the total amount of expenses for a predetermined usage period using the power purchase fees for the two or more unit times during the usage period, the power sale fees for the two or more unit times during the usage period, and the initial investment amount; An output acquisition unit that acquires output information based on the total amount of expenses for the usage period for each of the two or more pieces of investment information; A simulation device comprising an output unit that outputs the output information.

8. A simulation method realizable by a simulation device that can access a price management unit storing power purchase price information regarding expenses when purchasing power and power sale price information regarding expenses when selling power, and comprises an investment acquisition unit, a power generation amount acquisition unit, a difference acquisition unit, a fee acquisition unit, an initial investment amount acquisition unit, a total amount acquisition unit, an output acquisition unit, and an output unit, the method comprising: An investment acquisition step in which the investment acquisition unit acquires two or more pieces of investment information based on the number of installed solar panels; A power generation amount acquisition step in which the power generation amount acquisition unit acquires the power generation amounts for two or more unit times included in 24 hours during the usage period when the number of solar panels indicated by the installation number is installed for each of the two or more pieces of investment information; A demand amount acquisition step in which the demand amount acquisition unit acquires the demand amounts of power for the two or more unit times during the usage period; A difference acquisition step in which the difference acquisition unit acquires difference information, which is the difference between the power generation amount and the demand amount, for each of the two or more pieces of investment information and for each of the two or more unit times in the usage period; A charge acquisition step in which the charge acquisition unit acquires a purchased power charge using the shortage power amount, which is the absolute value of the difference information, and the power purchase information when the difference information is a negative number, and acquires a sold power charge using the surplus power amount, which is the difference information, and the power sale information when the difference information is a positive number, for each of the two or more pieces of investment information and for each of the two or more unit times in the usage period; An initial investment amount acquisition step in which the initial investment amount acquisition unit acquires the initial investment amount when installing the number of solar panels indicated by the installation number for each of the two or more pieces of investment information; A total amount acquisition step in which the total amount acquisition unit acquires the total amount of expenses for a predetermined usage period using the purchased power charge for each of the two or more unit times in the usage period, the sold power charge for each of the two or more unit times in the usage period, and the initial investment amount, for each of the two or more pieces of investment information; An output acquisition step in which the output acquisition unit acquires output information based on the total amount of expenses for the usage period for each of the two or more pieces of investment information; An output step in which the output unit outputs the output information, and a simulation method comprising the same.

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