Multiple-Input DC Meter for Bi-Directional Energy Tracking
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Solution Overview
Problem
Utility companies lack a system to accurately track and bill DC power usage, and the market is devoid of a unified solution to measure both AC and DC power using a single system.
Innovation Solution
A Multiple Input DC watt hour meter capable of measuring and monitoring AC and DC power, configured to measure energy consumption and generation from various DC power sources, including photovoltaic sources, battery storage, and electric vehicles, with features like wireless communication, backup power management, and bi-directional energy flow control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If utility companies use traditional separate AC and DC metering systems, then AC power measurement is reliable, but DC power usage cannot be accurately tracked and billed
Solution Approach 1:
The patent combines AC and DC metering capabilities into a single unified metering device. The system integrates multiple input terminals that can simultaneously accept both AC and DC power connections, with internal circuitry that independently measures and tracks energy from each source type, eliminating the need for separate metering systems
Solution Approach 2:
The metering system is designed with universal functionality to handle multiple power source types. It includes configurable input terminals and measurement circuits that can adapt to measure both alternating current and direct current power flow, providing a single device that performs what previously required multiple specialized instruments
2Measurement precision
If multiple separate metering devices are used for AC and DC power, then each measurement is accurate, but installation cost and complexity increase
Solution Approach 1:
The invention merges multiple independent metering functions into a single integrated device. The unified meter contains separate measurement circuits for AC and DC power that operate simultaneously, reducing the total number of devices from two or more separate meters to one consolidated unit, thereby simplifying installation and reducing complexity
3Ease of manufacture
If traditional metering systems are used, then installation is straightforward for single power sources, but material and installation costs increase for multiple power sources
Solution Approach 1:
By combining multiple metering functions into one device, the system reduces the quantity of installation materials required. Instead of installing multiple separate metering devices with associated wiring, mounting hardware, and connection components, a single unified meter requires fewer materials while providing the same comprehensive measurement capability for multiple power sources
Data Source
AI summary
Some embodiments describe a DC meter system that can be placed in-line between a power source and an electrical load. In some embodiments, the DC meter system includes a DC meter that has multiple inputs for receiving electricity from multiple power sources. In some embodiments, the DC meter has one or more outputs, each capable of delivering electricity to a different electrical load. In some embodiments, the DC meter can combine electricity from two or more of the multiple inputs into one of the outputs. In some embodiments, the DC meter has a controller that can enable a user to deliver electricity from a particular input to a particular output. In some embodiments, the DC meter is configured to enable transition of electricity between an input and an output in a bi-directional manner. In some embodiments, the DC meter can record an amount of electricity transmitted in either direction.