Tower photovoltaic stand board

Abstract

The utility model provides a towering photovoltaic stand board. The towering photovoltaic stand board comprises a stand rod and a beam and / or a connecting piece. A plurality of photovoltaic panels are laterally fixed on the vertical rods or / and the beams through the connecting pieces, so that the towering photovoltaic stand board is formed. The floor area is reduced, and the device can be installed in a standing place.

Description

Technical Field

[0001] This application relates to the fields of agricultural photovoltaic complementarity and new energy technology, and more specifically, to a tall photovoltaic sign that uses a specific intermittent lighting method to stimulate crop yield. Background Technology

[0002] The applicant's earlier application, "Quick Shadow Photovoltaic Growth Enhancement Method (CN118889951A)," proposed a technology for increasing crop yield through intermittent sunlight by horizontally laying photovoltaic strips on a load-bearing cable. Specifically, this method lays the photovoltaic strips in an array with alternating strip and space ratios. By adjusting the strip-to-space ratio and the height-to-space ratio, the shadows cast by the photovoltaic strips can move automatically without power, thereby providing intermittent sunlight to the crops, stimulating crop growth, and increasing yield.

[0003] However, in practical applications, this technical solution has revealed many shortcomings. On the one hand, the horizontally suspended photovoltaic strips severely hinder agricultural operations. Specifically, they impede the normal operation of aerial work platforms in the fields, limiting the promotion and application of agricultural mechanization; they hinder drone spraying of pesticides, increasing the difficulty and cost of agricultural pest and disease control; and they also obstruct the natural flow of rainwater, leading to dry soil beneath the photovoltaic strips and thus slowing plant growth. On the other hand, this technical solution is difficult to construct and has high facility costs. Due to the special arrangement of the photovoltaic strips, construction must be carried out using aerial work platforms, increasing construction costs and safety hazards.

[0004] Furthermore, actual testing revealed that only when the span of the photovoltaic cell strips exceeds 200m and the width is 0.2-0.3m can intermittent sunlight with suitable frequency and shadow width be generated, thus achieving better complementary benefits between photovoltaic power generation and agricultural production. However, under level 6 wind conditions, the dynamic load borne by the stay cables in this structure reaches 50-60 tons, thus requiring reinforced concrete pillars with a diameter of 0.8-1.2m for support. This not only results in a single pillar foundation concrete volume of 15-20 cubic meters and an excavation depth of 8-10m, increasing construction difficulty and cost, but also necessitates the use of stay cables to enhance structural stability. However, the use of stay cables and large-scale civil engineering projects can easily damage soil structure and root ecosystems, which is detrimental to sustainable agricultural development. Summary of the Invention

[0005] The purpose of this application is to provide a tall photovoltaic sign that effectively overcomes many shortcomings of existing technologies. Specifically, the tall photovoltaic sign of this application can avoid damage to soil structure and root ecosystem, reduce construction difficulty and facility costs, thereby providing more favorable conditions for agricultural production, promoting increased agricultural output and income, reducing the land area required, and allowing installation in a small space.

[0006] This application provides a tall photovoltaic signboard, characterized in that it comprises: a supporting structure component, a vertically arranged photovoltaic component, and a signboard photovoltaic array (J).

[0007] The supporting structure components—

[0008] It consists of a first upright (B) erected on the ground (e.g., the lower section of a cement pipe pile is driven vertically into the ground 2-3 meters deep with the upper end standing above the ground), and a (horizontal / diagonal) beam (C) and / or (photovoltaic) connector (X) fixed to the first upright (B).

[0009] The vertically arranged photovoltaic modules—

[0010] It is installed by tilting it to the side (although not at the optimal angle, it is still a very effective installation method) and along the first upright (B). The system comprises multiple photovoltaic panels (D) arranged longitudinally; these photovoltaic panels (D) are fixed to beams (C) and / or first uprights (B) by connectors (X); the width (S) of these photovoltaic panels (D) ranges from 0.3m to 3.25m (preferably from 0.3m to 1.35m, most preferably from 0.4m to 0.69m); the height (I) of these photovoltaic panels (D) ranges from 3m to 30m; these photovoltaic panels (D) are electrically connected in series and / or in parallel to form a stand-up photovoltaic array (J); the height (H) of the stand-up photovoltaic array (J), i.e., the height of the stand-up photovoltaic array (J), ranges from 3m to 30m; the width (K) of the stand-up photovoltaic array (J), i.e., the width of the stand-up photovoltaic array (J), ranges from 0.3m to 4.25m; and the aspect ratio H / K of the stand-up photovoltaic array (J) ranges from 3 to 24. A good aspect ratio H / K range is 4-24, with 5-24 being the most preferred.

[0011] The height (H) of the photovoltaic array (J) is preferably 5-15m, and most preferably 6-15m; this allows for a greater shadow length, enabling intermittent light to cover most of the planting space. In practice, the width (K) of the array and the width of its shadow can be equal to the arrangement width (S) of the photovoltaic panels (D), or equal to the arrangement width (S) of the photovoltaic panels (D) plus the width of the first pole (B) and the second pole (A). The reason for setting the height (H) of the sign to be between 3m and 30m is twofold. First, when the height (H) is less than 3m, the shadow (P) of the sign passing over the nearby plants (U) will move very slowly and stay on the plants (U) near the shadow (P) for a long time (e.g., more than 30 minutes). This will cause the nearby plants (U) to reduce their yield due to insufficient photosynthesis. Second, when the height (H) is greater than 30m, the first pole (B) must be a column with strong wind and shear resistance (e.g., a prestressed cement column with a diameter of more than 0.5m). This will make the photovoltaic array (J) unprofitable due to the high cost of the column. The reason for selecting the value range of the sign width (K) as 0.3m to 4.25m is twofold. First, when the sign width (K) exceeds 4.25m, the shadow of the sign (P) will stay on the plants (U) in the planting space for a long time (e.g., easily exceeding 30 minutes). This will lead to insufficient photosynthesis and reduced yield of nearby plants (U). Second, when the sign width (K) is narrower than 0.3m, the light-receiving surface and power generation of the standing photovoltaic array (J) will be too small, resulting in too high costs and low economic benefits. The reason why the aspect ratio H / K of the standing photovoltaic array (J) is preferably 3-24 is twofold. First, when the aspect ratio H / K is less than 3, the shadow (P) will be very wide and short, making it difficult to cover most of the planting space and to effectively utilize intermittent shadows (P) to increase yield. The time spent on the plants (U) in the planting space will be very long (e.g., easily exceeding 30 minutes), which will lead to a reduction in plant (U) yield due to weakened photosynthesis. Second, when the aspect ratio H / K is greater than 24, the wind resistance of the standing photovoltaic array (J) will be greatly weakened, making it easy to be destroyed by strong winds.

[0012] A preferable approach is to adopt a cloned planting structure.

[0013] (Multiple) standing photovoltaic arrays (J) should have a row spacing (L) of 4m or more (ideally below 45m) (greater than the standard width of agricultural machinery to allow it to pass through), and a spacing (T) of 0.65m (greater than the standard width of a draft ox to allow it to pass through) to 45m. Ideally, the spacing (T) should be between 0.65m and 22.5m to allow sufficient space for sunlight to pass through, preventing crop yield reduction due to insufficient photosynthesis, and avoiding waste and power loss due to excessively long photovoltaic connection wires caused by a spacing (T) exceeding 15m. The width-to-spacing ratio K / T should be... Intercropping is carried out in the field with a density ranging from 0.02 to 4 (preferably K / T of 0.2 to 2). A planting space for crops, trees, or pasture is formed between two standing photovoltaic arrays (J). The average daily direct sunlight transmittance of this planting space is ≥25% (preferably ≥75%) to ensure that the plants (U) in the planting space receive as much sunlight as possible for growth. The shadows (P) generated by the standing photovoltaic arrays (J) periodically block the sunlight from reaching the plants (U), thus creating intermittent lighting to stimulate plant (U) growth. The preferred value range for the width-to-space ratio K / T is 0.2 to 2 because: firstly, if it is below 0.2, the power generation per acre will be too low, the cost too high, and the economic benefits too low; secondly, if it is above 2, the average daily direct sunlight transmittance of the planting space will be below 25%, which will lead to insufficient photosynthesis and reduced plant (U) yield.

[0014] Preferably, the control parameters form intermittent shadows (P) and their frequency.

[0015] The height (H), width (K), spacing (T), row spacing (L), and aspect ratios H / K and K / T are adjusted to create intermittent shadows (P) and their frequency that stimulate plant (U) growth. Specifically, the parameters are adjusted to ensure that the same plant (U) is shaded by the shadow (P) at regular intervals (e.g., every 10-90 minutes, preferably every 20-60 minutes), with the shading time not exceeding 30 minutes per instance (preferably not less than 3 minutes per instance). This frequency of shadows (P) is used to intermittently shade and release the same plant (U), stimulating its growth. This generates intermittent light exposure with preset parameters and appropriate frequency, thereby stimulating crop growth and achieving the technical effect of increased yield from shadow (P). To standardize detection criteria, the occlusion time and interval of the card shadow (P) mentioned here are based on the standard detection time of 11:00 to 13:00 on the summer solstice, and the detection position of the card shadow (P) is based on its center point. For example, when measuring data such as the movement speed, occlusion time, and interval of the card shadow (P), the movement speed, occlusion time, and interval of the center point of the card shadow (P) should be measured, rather than the movement speed, occlusion time, and interval of other positions such as the top or bottom of the card shadow (P). Alternatively, the center point of the card shadow (P) can be detected at any other daytime time, and then the relevant data for 11:00 to 13:00 on the summer solstice can be calculated based on the detected data.

[0016] One of the purposes of comprehensively optimizing the aspect ratio H / K and width-to-space ratio K / T of the photovoltaic array (J) is to utilize the rising and setting of the sun to make numerous shadows (P) move rapidly from west to east, thereby creating intermittent lighting that covers 25% or 50% or 67% or more of the field area and planting space, stimulating the growth of plants (U) at the frequency required. In other words, shadows (P) pass over 25% or 50% or 67% or more of the planting space throughout the day; for example, the shadows (P) block sunlight from illuminating the same plant (U) every 20-60 minutes; the time of blocking sunlight from the same plant (U) does not exceed 20 minutes / time and is not less than 5 minutes / time. By using this frequency of shadows (P) to continuously block and release, then block and release again, intermittently illuminating the same plant (U), the inhibition mechanism of photosynthesis activated by continuous strong light can be avoided, which would lead to a decrease in photosynthetic efficiency, thereby stimulating plant (U) growth and increasing agricultural yield.

[0017] Preferably, parameters can be adjusted to ensure that the width of a midday shadow (P) can be moved every 1-20 minutes (ideally every 1-5 minutes). The width-to-spacing ratio (also known as the shading coefficient) K / T should be ≤3, avoiding the same shadow (P) remaining on the same plant (U) for more than 30 minutes. Ideally, the width-to-spacing ratio (also known as the shading coefficient) K / T should be ≤0.25, with sunlight blocked for 3-5 minutes every 20-30 minutes. This frequency of shadow (P) intermittently blocking and releasing sunlight on the same plant (U) is used to provide intermittent lighting (with set parameters).

[0018] The second purpose of requiring the standing photovoltaic arrays (J) to be arranged in the field at a row spacing (L) ≥ 4m is to reserve a larger passage for agricultural machinery between two adjacent rows of standing photovoltaic arrays (J) so as not to hinder agricultural machinery operations.

[0019] The reason why the standing photovoltaic array (J) is required to be laid out in the field with a preset parameter of width-to-spacing ratio K / T≤0.25 is threefold: to reserve a larger wind passage (to enhance air circulation) and light transmission passage (to control light intensity) between two adjacent standing photovoltaic arrays (J), so as to regulate the frequency of intermittent operation, reduce wind resistance and lower the wind resistance cost of the standing photovoltaic array (J), and increase light transmittance to prevent the shadows (P) from being too dense and affecting the photosynthesis of crops, thus leading to reduced yield.

[0020] Preferably, the tall photovoltaic signboard is characterized in that: a second pole (A) is added to the side of the first pole (B), (and even a third or fourth pole is added), and the horizontal distance between the second pole (A) and the first pole (B) is 0.3-3.25m or 0.3-1.5m; the photovoltaic panel (D) is installed sideways between the second pole (A) and the first pole (B) using a connector (X), preferably fixed to a beam (C), one end of the beam (C) is fixed to the second pole (A) and the other end is fixed to the first pole (B); it can also be directly fixed to the second pole (A) and the first pole (B), thereby forming a multi-pole supported photovoltaic array (J). The requirement for a horizontal pole spacing of 0.3-3.25m between the second pole (A) and the first pole (B) is to reduce the width of the photovoltaic array (J), thereby reducing wind resistance, ensuring airflow, reducing shading, increasing light transmittance in the planting space, and providing sufficient sunlight for the plants (U) to grow normally, thus generating intermittent lighting with appropriate frequency and shadow width. Research shows that a pole spacing of 0.3-1.5m is preferable, and ideally 0.3-0.69m is a tall, narrow, and long structure. Research also shows that when the pole spacing is less than 0.3m, the width of the photovoltaic panel (D) must also be less than 0.3m, which actually increases the overall cost; therefore, a spacing less than 0.3m is not recommended.

[0021] Preferably, the towering photovoltaic signboard is characterized in that: numerous photovoltaic arrays (J) stand on the ground facing south, preferably arranged in rows along an east-west direction, with a row spacing (L) ≥ the length of the signboard shadow (P) at noon ≥ 0.65m, that is, the row spacing (L) ≥ the length of the noon north shadow (N) ≥ 0.65m; or, the photovoltaic arrays (J) using double-sided photovoltaic panels (D) stand on the ground, preferably arranged in rows along a north-south direction, with one side of the double-sided photovoltaic panels (D) facing east and the other side facing west, the ratio of signboard height (H) to row spacing (L) H / L ≤ 0.67 or 0.28, and the signboard distance (T) ≥ the length of the noon signboard shadow (P) ≥ 0.65m, that is, the signboard distance (T) ≥ the length of the noon north shadow (N) ≥ 0.65m. In this way, when the solar altitude angle is greater than 15 degrees in the morning and evening, the longest shadow (P) of the standing photovoltaic array (J) will not be projected onto the adjacent standing photovoltaic array (J) and cause a hot spot effect. This ensures that the shadow (P) forming intermittent lighting is long enough to cover most of the planting space.

[0022] Preferably, the tall photovoltaic signboard is characterized by a height (H) to width (K) ratio H / K ≥ 3, 6, 12, or 24, wherein the width (K) is preferably 0.3-1.5m, and most preferably 0.3-0.69m. Research has found that when the width (K) is greater than 2.4m and the height (H) is less than 4.2m, the signboard shadow (P) is difficult to cover the entire planting space, which is detrimental to stimulating plant (U) growth. Therefore, the width of the photovoltaic array (J) can be reduced, and its height-to-width ratio H / K can be appropriately increased to improve the movement speed of the shadow (P), shorten the time the shadow (P) stays on the same plant (U), and allow sufficient light duration for the plant (U) to grow normally.

[0023] Preferably, the towering photovoltaic signboard is characterized in that: the photovoltaic array (J) of the signboard is erected at the edge of the site, preferably at the edge of a road, field ridge, or ditch, and its shadow (P) is projected onto non-arable land areas such as roads, field ridges, or ditches (including waterways). In this way, the technical effect of photovoltaics not occupying land, the shadow not obscuring the fields, and crops growing normally can be achieved.

[0024] Preferably, the tall photovoltaic signboard is characterized in that: below the photovoltaic array (J) of the signboard, there is a 0.5-3m (preferably less than 1.95m) high leg (Y) without photovoltaic panels (D), so as to avoid the nearby plants (U) from being in the shadow (P) of the signboard for a long time, resulting in reduced photosynthesis and slowed growth rate, and to avoid the plants (U) forming the shadow (P) of the signboard on the low-lying photovoltaic panels (D), which would cause a hot spot effect; wherein, the height of the high leg (Y) is greater than the height of the nearby plants (U); studies show that preferably the height of the high leg (Y) is greater than 1.63 times the average height of the nearby plants (U).

[0025] Preferably, the towering photovoltaic signboard is characterized in that: an irrigation water pipe (G) and / or a suspension cable (F) are horizontally suspended in the air between the two photovoltaic arrays (J), wherein the suspension cable (F) is also used (in place of the existing cable-stayed bridge) to hold the photovoltaic array (J) in order to resist wind, stabilize the structure, and avoid the use of cable-stayed bridges that would hinder agricultural machinery operations; or, an irrigation water pipe (G) is laid on the photovoltaic array (J) to spray irrigation water (W) from a height to all sides, so that each nozzle (Z) can cover a sufficiently large irrigation area.

[0026] Preferably, the towering photovoltaic signboard is characterized in that: the photovoltaic array (J) on the signboard is also connected to a cleaning nozzle (Z) [connected to an irrigation water pipe (G) (e.g., spraying water onto the photovoltaic panels)]. This cleaning nozzle (Z) is used to spray water to clean the photovoltaic panels (D) and to cool them down. In this way, the photovoltaic panels (D) can be automatically cleaned on one hand, and cooled on the other, achieving three benefits at once: increased efficiency in irrigation, cleaning, and cooling.

[0027] Preferably, the towering photovoltaic signboard is characterized in that: multiple photovoltaic arrays (J) of the signboard are connected in series and / or in parallel on the same inverter, thereby forming a photovoltaic power generation system.

[0028] Preferably, the towering photovoltaic signboard is characterized in that: a lightning rod (E) is installed on the top of the photovoltaic array (J) of the signboard, and its grounding resistance is ≤10Ω.

[0029] Preferably, the tall photovoltaic signboard is characterized in that: in regions between 35° and 50° north latitude, the photovoltaic panels (D) on the signboard photovoltaic array (J) are installed with their front facing south; or, the signboard photovoltaic array (J) uses double-sided photovoltaic panels (D), with one side facing east and the other side facing west, preferably in regions with latitudes below 35° north.

[0030] Preferably, the towering photovoltaic signboard is characterized in that: the supporting structure component is a high tower constructed by combining multiple uprights and crossbeams and / or inclined beams (to enhance wind resistance). The cross-section of the high tower can be triangular, rectangular, polygonal, or circular, and its photovoltaic panel (D) can be curved or flat.

[0031] Preferably, the towering photovoltaic signboard is characterized in that: the first pole (B) is a tower, the cross-section of which can be triangular, rectangular, polygonal, or circular. The photovoltaic panel (D) can be curved or flat.

[0032] Preferably, the tall photovoltaic signboard is characterized in that: the photovoltaic panel (D) is a double-sided photovoltaic panel (D), which is vertically fixed to the south side of the beam (C) and / or the first upright (B) by means of a detachable connector (X), with one side of the double-sided photovoltaic panel (D) facing east and the other side facing west. In this way, it is possible to minimize the obstruction of sunlight to the double-sided photovoltaic panel (D) at noon, and to minimize the very short period of no electricity at noon.

[0033] Preferably, the tall photovoltaic signboard is characterized in that: the diameter or thickness of the second pole (A) is 1-4 times the thickness of the frame of the double-sided photovoltaic panel (D); the ratio of the diameter or thickness of the second pole (A) located on the south side to the diameter or thickness of the first pole (B) located on the north side is 0.1-0.5. This minimizes the duration for which the second pole (A) blocks sunlight from the double-sided photovoltaic panel (D) at midday, thus avoiding very brief periods of no electricity at midday.

[0034] Preferably, the tall photovoltaic signboard is characterized in that: between two adjacent photovoltaic panels (D) on the upper and lower sides, there are air ducts such as air vents (R) reserved for air venting and resistance reduction, reducing wind resistance costs and basic investment.

[0035] Preferably, the towering photovoltaic signboard is characterized by having a hydrogen storage bag (Q) installed inside the tower, forming a photovoltaic energy storage device that integrates photovoltaic power generation and hydrogen energy storage, thus creating a photovoltaic energy storage system (e.g., a hydrogen fuel cell). This significantly increases the safety distances between signs (T) and rows (L), preventing hydrogen leakage from any hydrogen bag (Q). The leaked hydrogen will quickly disperse and rise into the air, preventing chain reactions and other safety accidents. The hydrogen storage bag (Q) refers to the flexible container such as the hydrogen bladder in the applicant's prior invention patent "Photovoltaic Energy Storage and Hydrogen Energy System and Photovoltaic Energy Storage and Hydrogen Energy Storage Device (CN118920531B)". The aerial hydrogen storage technology solution, which involves placing hydrogen storage bags (Q) inside the tower, provides a sufficiently large safety distance compared to the ground-based hydrogen storage technology solution in the "Photovoltaic-Storage-Co-hydrogen Energy System and Photovoltaic-Storage-Co-hydrogen Device (CN118920531B)", and also saves land resources, thus maximizing the hydrogen storage capacity per unit area.

[0036] The term "shadow" in this application refers to the shadow cast by the standing photovoltaic array (J). The term "standing" in this application includes an upright state with appropriate tilt (e.g., tilt within 33 degrees). The term "field" in this application broadly refers to farmland, forestland, grassland, and other land suitable for plant growth (U). The technological innovation of intermittent light stimulation for crop growth described in this application is a prior application of the applicant. How to adjust preset parameters such as interval width, shadow width, shadow length, and intermittent period to achieve increased yield has been discussed in the prior application "Fast Shadow Increase Ecological Photovoltaic Method (CN118889951A)" and will not be repeated here.

[0037] Compared with the prior art, this application has the following beneficial technical effects.

[0038] Firstly, according to testing, compared with the "photovoltaic cell strip" in the background technology CN118889951A, the width of the transverse suspension cable (F) or irrigation pipe (G) in this application has been reduced from 200-300 mm to 15.2 mm, which reduces wind resistance by more than ten times, reduces the amount of foundation engineering by more than 80%, and reduces the amount of concrete used from the original 15 m³ / column to 3 m³ / column; the wind resistance is greatly improved.

[0039] Tests showed that the stand-up photovoltaic array (J) and its photovoltaic panels (D) in this application hardly swayed in winds below level 6, and the electricity generated was stable and without fluctuations. In contrast, the "photovoltaic cell strip" in the background technology CN118889951A swayed significantly in winds below level 6, and the electricity generated was unstable and fluctuated greatly, making it difficult to meet the requirements for grid connection.

[0040] Secondly, compared with the "tall support" in the background technology CN118889951A, the second pole (A) and the first pole (B) do not require the use of cable stays, are easy to construct, have low cost, and have shallow pile foundations, thus having little impact on the farmland ecology.

[0041] Thirdly, the standing photovoltaic array (J) is tall and sideways, and its photovoltaic panels (D) are easy to automatically spray water for cleaning, dust removal and cooling. Its shadow (P) moves quickly, stays on the same plant (U) for a short time, and can provide the plant (U) with enough light for normal growth.

[0042] Fourth, freestanding photovoltaic arrays (J) can use inexpensive rigid photovoltaic panels (D), while cylindrical photovoltaic poles must use twice as many expensive flexible or curved photovoltaic modules. For example, the current market price of rigid photovoltaic panels (D) is about 0.7 yuan / watt, while the current market price of flexible and curved photovoltaic modules for cylindrical photovoltaic poles with the same bending radius is about 2.6 yuan / watt. Compared to the former, the cost of using rigid photovoltaic panels (D) is several times cheaper (2 × 2.6 / 0.7 = 7.4 yuan / watt).

[0043] Fifth, the standing photovoltaic array (J) is superior to the low-profile photovoltaic supports in existing agricultural photovoltaic complementary systems (such as...). Figure 14 As shown in the figure, it does not occupy any land. It can be installed in any available space, such as field ridges, ditches, roadsides, etc. (no land is required). It does not hinder agricultural machinery operations or the growth of plants. It can protect the ecology while generating photovoltaic power.

[0044] Sixth, compared with the horizontally suspended "photovoltaic cell strips" in the background technology CN118889951A, the vertical stand-alone photovoltaic array (J) in this application does not hinder ultra-high mechanical operations, does not hinder drone spraying of pesticides, does not hinder rainwater falling, will not cause the soil below the "photovoltaic cell strips" to dry out or slow down plant growth, does not require the use of aerial work platforms for high-altitude construction operations, and has low implementation costs.

[0045] Seventh, workers can climb the poles to carry out construction, eliminating the need for aerial work platforms or other high-altitude work equipment. Construction is simple and cost-effective.

[0046] Eighth, compared with the horizontal "photovoltaic cell strip" in the background technology CN118889951A, the side-mounted photovoltaic panel (D) in this application is less prone to dust accumulation, is easy to be cleaned by rainwater, and is easy to remove dust by spraying water.

[0047] Ninth, by adjusting preset parameters such as the height-to-width ratio H / K and the width-to-span ratio K / T, the standing photovoltaic array (J) generates intermittent light (different from the current vertically installed bifacial photovoltaic power station) that can stimulate the growth of plants (U), thereby increasing crop yield and improving the ecological environment.

[0048] Tenth, Intermittent Lighting Stimulates Growth: The applicant once posed the following question to a certain AI model: "I conducted many experiments, shading the dragon fruit for 3-5 minutes every 20 minutes daily, alternating between shading and rapid, intermittent lighting. This stimulated dragon fruit growth and increased yield. Why?" The response was as follows: 1. Dragon fruit growth depends on the energy and nutrients produced by photosynthesis. However, prolonged sunlight exposure may lead to excessive accumulation of photosynthetic products, affecting normal respiration and thus impacting the overall metabolic balance of the crop. Intermittent lighting may help regulate the balance between photosynthesis and respiration, allowing the crop to accumulate energy and nutrients during periods of sunlight and perform necessary respiration during periods of shading, thereby optimizing the crop's growth state. 2. Light Signal Regulation: Light is not only the energy source for photosynthesis but also an important signal for crop growth and development. Intermittent lighting may simulate changes in light intensity in nature, which are perceived by the crop and converted into growth signals. Studies have shown that light signals can regulate physiological processes such as the crop's growth cycle, flowering time, and fruit development. Therefore, intermittent lighting may promote the growth and yield of dragon fruit by affecting light signal transduction pathways. 3. Reducing photoinhibition and photodamage: Under strong light, the photosynthetic system of crops may be inhibited or damaged, leading to a decrease in photosynthetic efficiency. Intermittent lighting can reduce the risk of crops being exposed to strong light for extended periods, reducing photoinhibition and photodamage. This helps protect the photosynthetic system of dragon fruit, maintaining high photosynthetic efficiency, thus benefiting crop growth and yield. 4. Experimental effect analysis: Intermittent lighting may promote the growth of dragon fruit branches and leaf expansion by regulating the secretion of growth hormones and the rate of cell division. Simultaneously, good growth conditions help crops better absorb and utilize nutrients, laying a solid foundation for flowering and fruiting. Light is one of the important factors affecting crop flowering and fruiting. Intermittent lighting may improve the flowering and fruit setting rates of dragon fruit by optimizing light signal transduction pathways and promoting crop growth and development. Furthermore, good growth conditions also help improve fruit quality and yield, making dragon fruit fuller and sweeter. In conclusion, your experiment, through intermittent light exposure, may have promoted photosynthesis and balanced growth and development in dragon fruit, thereby increasing its growth rate and yield.

[0049] Eleventh, it replaces dedicated sunshade nets and has a good sun protection effect: For shade-loving plants, the shade net also has the sunshade function of the existing sunshade nets, thus eliminating the need for sunshade nets and saving agricultural production costs.

[0050] In summary, this application replaces the horizontally suspended "photovoltaic cell strips" in the prior art CN118889951A with a dispersed, upright photovoltaic array (J), and replaces the shadows of the horizontal "photovoltaic cell strips" with the shadows of the vertical photovoltaic array (J). This overcomes many of the shortcomings described in the prior art, achieving the same intermittent sunlight yield-increasing effect with a more environmentally friendly intercropping scheme and lower facility costs. The towering photovoltaic panels in this application do not occupy land and can be installed in any available space, such as on the edges of roads, river channels, field ridges, squares, etc. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of the structure of a stand-up photovoltaic array (J) in this application (Example 1).

[0052] Figure 2 This is a schematic diagram of another stand-up photovoltaic array (J) in this application (Example 2).

[0053] Figure 3 This is a schematic diagram of the application scenario of the stand-up photovoltaic array (J) and crop intercropping in this application (Example 3).

[0054] Figure 4 This is a schematic diagram illustrating the application scenario of intercropping four standing photovoltaic arrays (J) with trees in this application (Example 4).

[0055] Figure 5 for Figure 4 A schematic diagram illustrating the application scenario of intercropping twelve standing photovoltaic arrays (J) with trees.

[0056] Figure 6 This is a schematic diagram of a high tower-type support structure component constructed from multiple uprights, horizontal beams, and diagonal beams.

[0057] Figure 7 This is a schematic diagram of a structure in which a photovoltaic panel (D) is fixed to a beam (C) via a connector (X).

[0058] Figure 8 This is a structural schematic diagram of a current connector (clamp).

[0059] Figure 9 This is a schematic diagram of a technical solution that is not recommended.

[0060] Figure 10 This is a schematic diagram of the application scenario of a row of photovoltaic arrays (J) located between a field and a road in this application (Example 5).

[0061] Figure 11 This is a schematic diagram of the longitudinal section of the tower in this application (Example 6) containing a hydrogen storage bag (Q).

[0062] Figure 12 This is a schematic diagram of the stand-up photovoltaic array (J) with an air vent (R) in this application (Example 7).

[0063] Figure 13 This is a schematic diagram of another stand-alone photovoltaic array (J) structure with an air vent (R) in this application (Example 8).

[0064] Figure 14 This is a schematic diagram of an application scenario for a current low-profile agricultural photovoltaic complementary system.

[0065] Figure 15 This is a schematic diagram of the shadow trajectory of a signboard photovoltaic array (J) in this application throughout the day.

[0066] Figure 16 A schematic diagram of the shadow trajectory of the 24 standing photovoltaic arrays (J) in this application arranged in a row throughout the day.

[0067] Figure 17 This is a schematic diagram of a current low-profile, unspaced, stand-alone photovoltaic application scenario.

[0068] Figure 18 This is a schematic diagram of the structure of the two stand-alone photovoltaic arrays (J) in this application (Example 9).

[0069] Figure 19 This is a schematic diagram of the structure of a stand-up photovoltaic array (J) in this application (Example 9).

[0070] The following are the symbol labels: A - First pole, B - Second pole, C - Beam, D - Photovoltaic panel, E - Lightning rod, F - Suspension cable, H - Sign height, I - Arrangement height, J - Photovoltaic array, K - Sign width, G - Irrigation pipe, L - Row spacing, N - Noon shadow, T - Sign spacing, S - Width, W - Irrigation water, X - Connector, Y - Leg, Z - Sprinkler (water) nozzle, U - Plant, Q - Hydrogen bag, P - Sign shadow, R - Vent. Detailed Implementation

[0071] To make the technical means, creative features, objectives and effects of this application easier to understand, the following describes this application in conjunction with specific implementation methods.

[0072] In the description of this application, it should be noted that the terms "upper" and "lower" and other terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0073] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "communication" should be interpreted broadly. For example, "communication" can refer to electrical connection or direct connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0074] Example 1.

[0075] like Figure 1 As shown, in a region at 50 degrees north latitude, on a plot of land of several thousand acres (such as a wheat field, vegetable garden, cornfield, orchard, or grassland), rows of standing photovoltaic arrays (J) are installed along a north-south direction, each with at least one first upright (B). Several crossbeams (C) are fixed to the south side of each first upright (B), with the length of each crossbeam (C) not exceeding 3 meters, preferably 0.3-0.69 meters. This allows for the installation of narrower standing photovoltaic arrays (J) to reduce the torque of strong winds and minimize the impact of the array's shadow (P) on plant (U) photosynthesis.

[0076] Multiple photovoltaic panels (D) are detachably mounted sideways on a beam (C) using clamps, clamps, and other photovoltaic connectors (X) (instead of using the local optimal tilt angle). They are arranged vertically along the height of the first upright (B) and electrically connected in series and / or parallel to assemble a vertically arranged photovoltaic module. In this way, the first upright (B) and the photovoltaic panels (D) constitute a standing photovoltaic array (J), with an overall height (H) of 3-30m, preferably not exceeding 15m. This is because, above 15m, wind resistance increases exponentially, significantly increasing the installation cost of the first upright (B).

[0077] The photovoltaic array (J) and plants (U) are interplanted, and the row spacing (L) of the photovoltaic array (J) is preferably 0.5-45m. The row spacing (L) or the spacing between the arrays (T) forms a planting space for crops, trees or pasture, and the average daily light transmittance of the ground in the planting space is preferably ≥25% to ensure that the plants (U) in the planting space can receive as much sunlight as possible to grow.

[0078] The height (H) of the photovoltaic array (J) ranges from 3m to 30m, and the width (K) ranges from 0.15m to 4.25m (preferably 0.3m to 1.9m). The aspect ratio H / K of the photovoltaic array (J) is ≥1.8, 3, 6, 12, 24, or 98 (preferably 3-24). The height (H) is preferably 4-15m, and most preferably 5-10m. This allows for a greater length of the shadow (P), enabling intermittent sunlight to cover a larger planting space, for example, allowing the shadow (P) to cover more than 25% or 50% of the planting space. In other words, a planting space is reserved between two photovoltaic arrays (J) for the growth of crops, trees, or pasture, with a daily average direct sunlight transmittance of ≥25% (preferably ≥75%).

[0079] By adjusting preset parameters such as the spacing (T), shadow width, shadow length, and intermittent period of the photovoltaic array (J), it is ensured that the shadow (P) of the photovoltaic array (J) blocks sunlight from illuminating the plants (U) at regular intervals (e.g., every 20-60 minutes). The blocking time for a single plant (U) should not exceed 30 minutes per instance, and preferably should not be less than 3 minutes per instance. This preset parameter creates intermittent light to stimulate plant (U) growth. In this way, intermittent light with suitable preset parameters can be generated, thereby stimulating crop growth and achieving the technical effect of increased yield from the shadow (P).

[0080] Ideally, the base of the photovoltaic array (J) should have a 0.5-3m high (Y) shelf without photovoltaic panels (D) to prevent nearby plants (U) from spending too much time in the shade (P), thus reducing photosynthesis and slowing growth. Studies show that the height of the shelf (Y) should ideally be more than 1.63 times the average height of the nearby plants (U).

[0081] Finally, by connecting the vertically arranged photovoltaic modules in multiple stand-up photovoltaic arrays (J) in series and / or in parallel to the same inverter, a photovoltaic power generation system can be formed.

[0082] The applicant conducted the following intermittent light experiment in a wheat-growing area of ​​the North China Plain (36°N latitude): a standing photovoltaic array (J) with a height H=15m; array width (K)=0.6m, H / K=24; and row spacing (L)=20m was used, thus ensuring that the shadow coverage (P) of the array on the winter solstice was <20%. The experiment showed that the wheat grew well, better than the control field by 92%.

[0083] Example 2.

[0084] like Figure 2As shown, in a field of thousands of acres (such as a wheat field, vegetable field, corn field, orchard, or grassland), rows of standing photovoltaic arrays (J) with a first pole (B) and a second pole (A) are installed along the north-south direction.

[0085] Multiple crossbeams (C) are fixed between the second upright (A) and the first upright (B), with the spacing between the crossbeams (C) preferably being 0.3-0.69m. In this way, due to the reinforcement provided by the second upright (A), the signboard photovoltaic array (J) can withstand strong wind torque, so photovoltaic panels (D) approximately 1134mm wide (equivalent to a standard panel) can be used to construct the signboard photovoltaic array (J).

[0086] Multiple photovoltaic panels (D) are detachably mounted sideways on a crossbeam (C) using clamps, brackets, and other photovoltaic connectors (X), and arranged vertically along the height of the first upright (B). These photovoltaic panels (D) are connected in series and / or in parallel to form a vertically arranged photovoltaic module. In this way, the second upright (A), the first upright (B), and the photovoltaic panels (D) constitute a standing photovoltaic array (J). For users in the Northern Hemisphere, the photovoltaic panels (D) can be installed facing south, or double-sided photovoltaic panels (D) can be installed with one side facing east and the other side facing west.

[0087] Preferably, in regions between 35° and 50° north latitude, the photovoltaic panels (D) on the stand-up photovoltaic array (J) are installed with the front facing south; in regions below 35° north latitude and in regions between 35° and 50° north latitude, the stand-up photovoltaic array (J) uses double-sided photovoltaic panels (D), with one side facing east and the other side facing west.

[0088] The overall height (H) of the photovoltaic array (J) is 3-30m, preferably not exceeding 15m. This is because, above 15m, wind resistance increases exponentially, significantly increasing the installation cost of the first pole (B) and the second pole (A).

[0089] The photovoltaic array (J) and the plants (U) are arranged in an interleaved manner, and the row spacing (L) is preferably 4-45m.

[0090] The second pole (A) or the first pole (B) is equipped with a lightning rod (F) at its top, and its grounding resistance is ≤10Ω.

[0091] The ratio of the overall height (H) of the standing photovoltaic array (J) to the width (S) of the photovoltaic panel (D) is H / S ≥ 1.8, 3, 6, 12, or 24, wherein the width (S) is preferably 0.3-1.5m, and most preferably 0.3-0.69m. This reduces the width and density of the standing photovoltaic array (J), increases the movement speed of the shadow (P) of the array (J), shortens the time the shadow (P) stays on the same plant (U), and allows the plant (U) sufficient light duration for normal growth. A search revealed no existing technology that arranges photovoltaic panels in a tall, side-standing manner and coordinates them with agricultural and forestry planting spaces according to a specific geometric relationship. The innovation of this application lies not only in the structure itself, but also in achieving intermittent lighting through precise spatial parameter design, thus realizing the synergistic optimization of photovoltaic power generation and planting.

[0092] Finally, by connecting the photovoltaic panels (D) of multiple stand-alone photovoltaic arrays (J) in series and / or in parallel to the same inverter, a photovoltaic power generation system can be formed.

[0093] Example 3.

[0094] like Figure 3 As shown, referring to the steps in the two examples above, a suspension cable (F) and an irrigation pipe (G) are horizontally suspended in the air between the standing photovoltaic array (J), with the irrigation pipe (G) suspended by the suspension cable (F). In this way, while generating photovoltaic power, water can also be sprayed (W) to irrigate the plants (U) in the field. The (horizontal) suspension cable (F) is also used (instead of the existing cable-stayed structure) to hold the standing photovoltaic array (J) in place, to resist wind force, stabilize the structure, and avoid the obstruction of agricultural machinery operations caused by using cable-stayed structures.

[0095] Tests show that adjusting the aspect ratio H / K and width-to-span ratio K / T of the stand-alone photovoltaic array (J) can increase the movement speed of the array's shadow (P) and shorten the time the shadow (P) stays on the same plant (U), thereby creating intermittent light that stimulates the plant (U) to grow. For example, by having the shadow (P) of the stand-alone photovoltaic array (J) block sunlight from illuminating the plant (U) every 20-60 minutes, and by continuously blocking and releasing the shadow on a single plant (U) for no more than 20 minutes and no less than 5 minutes, this intermittent light exposure to plants like dragon fruit (U) with set parameters can avoid the photosynthetic efficiency decrease caused by the activation of the photosynthetic inhibition mechanism by continuous strong light, thus stimulating plant (U) growth and increasing agricultural yield.

[0096] Figure 15The image shows the shadow (P) trajectory and data of a 15m high and 0.5m wide standing photovoltaic array (J) at 11 different times of day on the summer solstice in the region of 30° North latitude. The longest shadows (P) are at 64° West of North and 64° East of North, at 42.8m and 42.7m respectively. The shortest shadow (P) is at noon, at 4.1m, meaning the noon north shadow (N) is the shortest; therefore, the distance between the two shadows (T) should be ≥4.1m.

[0097] Figure 16 This refers to the trajectory of the shadows (P) formed by 24 standing photovoltaic arrays (J) at 11 times of the day. Technical parameters such as array height (H), array width (K), array spacing (T), row spacing (L), and aspect ratios H / K and K / T are adjusted to obtain intermittent shadows (P) and their frequency that stimulate plant (U) growth. By adjusting these parameters, it is guaranteed that the same plant (U) will be shaded every 20-60 minutes, with the shading time ideally not exceeding 30 minutes per instance and not less than 3 minutes per instance. It is also guaranteed that the shadows (P) can move a distance equal to the width of a midday shadow (P) every 1-20 minutes. In this way, the same plant (U) can be intermittently illuminated by the shadows (P) at this frequency through repeated shading and unshaking, thereby stimulating plant (U) growth.

[0098] The goal is to adjust the height (H) of the standing photovoltaic array (J) to ensure that when the solar altitude angle is greater than 15 degrees in the morning and evening, the longest shadow (P) of the standing photovoltaic array (J) will not be projected onto adjacent standing photovoltaic arrays (J), and it can cover most of the planting space. The spacing (T) between the standing photovoltaic arrays (J) should be adjusted so that the distance (T) ≥ the length of the shadow (P) of the standing photovoltaic array (J) at noon ≥ 4.1m; in other words, the distance (T) should ≥ the length of the north shadow (N) at noon ≥ 0.65m. This allows the standing photovoltaic array (J) to move throughout the day, creating intermittent sunlight that covers more than 25%, 50%, or even 67% of the planting space, ensuring that the intermittent sunlight covers most of the planting area.

[0099] Example 4.

[0100] like Figure 4 , Figure 5 , Figure 6As shown, referring to the three examples above, numerous standing photovoltaic arrays (J) are interspersed with trees and other plants (U). Ideally, cleaning nozzles (Z) connected to irrigation pipes (G) should be connected to the standing photovoltaic arrays (J) to clean and cool the photovoltaic panels (D), thereby improving power generation efficiency. In this way, the photovoltaic panels (D) can be automatically cleaned and cooled, achieving multiple objectives: irrigation, cleaning, and improved efficiency.

[0101] What needs to be commented on here is, such as Figure 9 The technical solution shown, as well as "a photovoltaic device erected using a high tower (CN221900805U)," are both photovoltaic devices erected using high towers. Because their photovoltaic panel (D) array is a nearly square rectangle, its area and shadow (P) are large, thus affecting plant (U) photosynthesis. Furthermore, because the photovoltaic panel (D) array is located at the top of the pole (where the lever arm is long), its wind bending moment is large. Calculations show that if... Figure 9 The method shown, where the photovoltaic panel (D) is installed at the top of the pole, would result in a bending moment on the pole caused by a category 12 typhoon, which would be 3.42 times the bending moment on the pole (with a shorter lever arm) caused by a photovoltaic panel (D) of equal area in this application. Therefore, this method is not recommended for implementation. Figure 9 The technical solution shown. In other words, adopting this application Figure 1-2 , Figure 12-13 The stand-up photovoltaic array (J) scheme shown is compared to the one using... Figure 9 The technical solution shown can reduce the cost of poles and their infrastructure by more than 3.42 times.

[0102] Example 5.

[0103] like Figure 10 As shown, the photovoltaic array (J) stands on the north side of the plot and is located on the south side of a road, field ridge, or ditch. Its shadow (P) is projected onto non-cultivated areas such as roads, field ridges, ditches, or rivers outside the fields. In this way, the towering photovoltaic array described in this application neither occupies farmland nor blocks the sunlight needed for crop growth, thus achieving the technical effect of photovoltaics not occupying land and the shadow not obstructing the fields.

[0104] Example 6.

[0105] like Figure 11As shown, hydrogen storage bags (Q) are installed inside a high tower or tower cylinder to form a photovoltaic energy storage device that integrates photovoltaic power generation and hydrogen energy storage, thus creating a photovoltaic-energy storage hydrogen fuel cell energy system. This significantly increases the safety distances such as the spacing between plates (T) and rows (L), preventing hydrogen leakage from any hydrogen bag (Q). The hydrogen will quickly diffuse and rise into the air, preventing a chain reaction of combustion. The hydrogen storage bag (Q) refers to the flexible containers such as hydrogen bladders and hydrogen bags (Q) in the applicant's prior patent "Photovoltaic-Energy Storage and Co-location Hydrogen Energy System and Photovoltaic-Energy Storage and Co-location Device (CN118920531B)". The aerial hydrogen storage technology solution, which involves placing hydrogen storage bags (Q) inside the tower, provides a sufficiently large safety distance compared to the ground-based hydrogen storage technology solution in the "Photovoltaic-Storage-Co-hydrogen Energy System and Photovoltaic-Storage-Co-hydrogen Device (CN118920531B)", and also saves land resources, thus maximizing the hydrogen storage capacity per unit area.

[0106] Example 7.

[0107] like Figure 12 As shown, referring to the above embodiments, on the south side of the first upright (B), eight relatively short photovoltaic panels (D) (e.g., 0.67m high) are detachably and sideways mounted on the (cross) beam (C) and the first upright (B) using connectors (X) such as clamps and clamps, with a large spacing between them. This creates a large air duct (e.g., 0.2-0.4m high) between adjacent photovoltaic panels (D) to reduce wind resistance. It is best to install the photovoltaic panels (D) sideways with reference to the optimal tilt angle for the local area. In this way, the resulting stand-alone photovoltaic array (J) not only has low wind resistance but also high power generation efficiency, can withstand strong winds, and reduces foundation investment.

[0108] Example 8.

[0109] like Figure 13 As shown, referring to the above embodiments, eight relatively short (e.g., 0.4m high) photovoltaic panels (D) are detachably and sideways installed on the south side of the first pole (B) and the second pole (A) via connectors (X), with a large spacing between them. This creates a large (e.g., 0.3m high) air vent (R) between adjacent photovoltaic panels (D) to reduce wind resistance. It is best to install the photovoltaic panels (D) at an angle relative to the local optimal tilt angle to create a wind-guiding slope, thereby directing airflow to the air vent (R). In this way, the resulting stand-alone photovoltaic array (J) acts like a louver, allowing ventilation while generating electricity, thus resisting strong winds and reducing wind-resistant costs.

[0110] What needs to be commented on here is, such as Figure 17The existing low-profile and unspaced standing photovoltaic system shown is an undesirable application because it is installed continuously in a low profile without spacing, so it does not create intermittent sunlight and cannot stimulate crop growth and increase yield.

[0111] Example 9.

[0112] like Figure 18 As shown in the above embodiments, the photovoltaic panel (D) is a double-sided photovoltaic panel (D). This double-sided photovoltaic panel (D) is vertically fixed to the south side of the beam (C) and / or the first upright (B) via a detachable connector (X). One side of the double-sided photovoltaic panel (D) faces east, and the other side faces west. This minimizes the obstruction of sunlight to the double-sided photovoltaic panel (D) at midday, thus avoiding brief periods of no electricity at midday.

[0113] Preferably, such as Figure 19 As shown, the diameter or thickness of the second pole (A) is 1-4 times the thickness of the frame of the double-sided photovoltaic panel (D); the ratio of the diameter or thickness of the second pole (A) located on the south side to the diameter or thickness of the first pole (B) located on the north side is 0.1-0.5. In this way, the duration of the second pole (A) shading the double-sided photovoltaic panel (D) at noon can be minimized, thus avoiding a very short period of noon power outage.

[0114] The above-disclosed embodiments are merely preferred embodiments of this application. The accompanying drawings are only schematic diagrams and are not drawn to scale. They cannot be used to limit the scope of this application. Equivalent variations made based on the claims of this application still fall within the scope of this application.

Claims

1. A tall photovoltaic signboard, characterized in that, It includes: ① Supporting structural components—— It consists of a first upright post B standing on the ground, and a beam C and / or a connector X fixed to the first upright post B; ② Vertically arranged photovoltaic modules—— It consists of photovoltaic panels D arranged longitudinally along the first upright post B, which are erected on their sides. These photovoltaic panels D are fixed to the beam C and / or the first upright post B by connectors X. The width S of these photovoltaic panels D ranges from 0.3m to 3.25m, and the height I of these photovoltaic panels D ranges from 3m to 30m. These photovoltaic panels D are electrically connected in series and / or parallel to form a standing photovoltaic array J. The height H of the standing photovoltaic array J ranges from 4m to 30m, the width K of the standing photovoltaic array J ranges from 0.3m to 4.25m, and the height-to-width ratio H / K of the standing photovoltaic array J ranges from 3 to 24.

2. The tall photovoltaic signboard according to claim 1, characterized in that: A second pole A is added next to the first pole B; the photovoltaic panel D is fixed between the second pole A and the first pole B by the connector X, thus forming a multi-pole supported photovoltaic array J.

3. The tall photovoltaic signboard according to claim 1, characterized in that: Between adjacent photovoltaic panels D, there is a pre-reserved air vent R for air venting and resistance reduction.

4. The tall photovoltaic signboard according to claim 1, characterized in that: The height H of the sign is between 5m and 15m, or between 6m and 15m; the height-to-width ratio H / K is between 4 and 24, or between 5 and 24.

5. The tall photovoltaic signboard according to claim 1, characterized in that: A standing photovoltaic array J stands at the edge of the site.

6. The tall photovoltaic signboard according to claim 1, characterized in that: At the bottom of the standing photovoltaic array J, there is a 0.5-3m high leg Y without photovoltaic panels D.

7. The tall photovoltaic signboard according to claim 1, characterized in that: In the region between 35° and 50° north latitude, the photovoltaic panels D on the stand-up photovoltaic array J are installed facing south; or, the photovoltaic panels D used in the stand-up photovoltaic array J are installed with one side facing east and the other side facing west.

8. The tall photovoltaic signboard according to claim 1, characterized in that: The photovoltaic panel D is fixed vertically to the south side of the beam C and / or the first upright B by means of a detachable connector X. The photovoltaic panel D is installed with one side facing east and the other side facing west.

9. The tall photovoltaic signboard according to claim 1, characterized in that: The diameter or thickness of the second pole A is 1-4 times the thickness of the frame of the photovoltaic panel D; or, the ratio of the diameter or thickness of the second pole A located on the south side to the diameter or thickness of the first pole B located on the north side is 0.2-0.5.

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