Smart Load Management for EV Charging Without Panel Upgrades
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Solution Overview
Problem
The increasing adoption of electric vehicles and solar systems can overload existing electrical infrastructure, leading to circuit tripping, device malfunctions, and the need for costly electrical panel upgrades.
Innovation Solution
A smart load manager (SLM) apparatus and intelligent electric vehicle supply equipment (EVSE) units monitor and distribute power load to optimize EV charging, preventing overload by dynamically adjusting charging rates based on available power, thereby avoiding the need for electrical panel upgrades.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electric vehicles and solar systems are added to houses and buildings, then the charging and energy generation capacity increases, but the electrical infrastructure becomes overloaded causing circuits to trip and devices to malfunction
Solution Approach 1:
The system dynamically adjusts EV charging rates in real-time based on available power from solar systems and grid supply. The load manager continuously monitors power availability and modifies charging parameters to prevent overload while maximizing charging capacity, transforming the static electrical infrastructure into a dynamic, adaptive system.
Solution Approach 2:
The invention changes operational parameters by adjusting charging rates, power distribution ratios, and load allocation based on real-time conditions. By varying these parameters dynamically, the system optimizes EV charging capacity while maintaining electrical system stability without requiring infrastructure upgrades.
2Power
If the maximum power load is increased to accommodate EV charging, then the charging speed and capacity improve, but costly electrical panel upgrades are required
Solution Approach 1:
The system implements partial action by providing EV charging at variable rates based on available power rather than always at maximum capacity. This allows the existing electrical infrastructure to handle EV charging loads without requiring upgrades, as the charging power is adjusted to match what the current system can safely provide.
Solution Approach 2:
By changing the operational parameter of charging rate from fixed maximum to dynamically adjusted levels, the system achieves effective EV charging capability without increasing the maximum power load capacity of the electrical infrastructure, thereby avoiding upgrade costs.
3Ease of operation
If power is traditionally distributed based on maximum total load, then the system is simple to manage, but it cannot optimize EV charging or reduce solar installation costs
Solution Approach 1:
The load manager implements feedback control by continuously monitoring power consumption, solar generation, and grid availability, then using this information to dynamically adjust EV charging rates. This closed-loop feedback system optimizes power distribution for EV charging while maintaining simple operation through automated control.
Solution Approach 2:
The system achieves multi-functionality by simultaneously managing traditional household power distribution, solar energy integration, and EV charging optimization. The load manager performs multiple functions including load balancing, rate adjustment, and cost reduction strategies, making the power distribution system adaptable to various needs without sacrificing ease of operation.
Data Source
AI summary
A solar system installed at a house or building, which may include solar panels and a solar inverter. When the solar system is installed at the house or building, the power load associated with the solar system might overload an electrical panel. This might force the owner of the house or building to spend thousands of dollars on an electrical panel upgrade. To avoid such an expensive upgrade, a smart load manager (SLM) is disclosed that can communicate with the solar inverter and can control it. The SLM can function as a real-time load shedding device, thereby avoiding the cost of a load center/panel upgrade, while enabling a safe and cost-effective solar system installation.