Hi everyone, I wanted to share my recent experience with setting up an EVSE load balancing system. It’s been a fascinating journey, and I hope my setup can inspire or help others who are looking to optimize their EV charging with renewable energy integration.
The Setup:
I’ve designed my system to operate in three modes: Manual, Hybrid, and Solar. Each mode serves a specific purpose depending on my energy needs and availability. Here’s a brief overview of how it works:
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Manual Mode:
- This is the simplest mode where I manually set the charging current. The EVSE charges at the specified rate regardless of solar production. It’s great for times when I want full control over the charging process.
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Hybrid Mode:
- In this mode, the automation adjusts the charging current based on solar production while allowing a configurable amount of power to be drawn from the grid. This ensures that I’m still utilizing renewable energy as much as possible without relying solely on solar power.
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Solar Mode:
- This mode is designed to maximize solar energy usage. The EVSE only charges when there’s excess solar power available. If the minimum solar power threshold isn’t met, the charging stops, and it resumes once the threshold is reached again.
Key Components:
- EVSE Integration: I’m using the Lektrico 1P7K, but this setup can work with other EVSE models like Wallbox.
- PV System: Essential for solar mode, as it provides the data needed to determine solar production.
- Automation Tools: I’ve created custom helpers in Home Assistant, including a counter for current control, a dropdown for mode selection, and a number input for hybrid mode limits.
Challenges and Solutions:
One of the biggest challenges was ensuring the automation could dynamically adjust the charging current based on real-time solar production. I had to experiment with different thresholds and step sizes to get smooth operation. Another hurdle was ensuring compatibility with my existing Home Assistant setup, which required some tweaking of MQTT entities and state sensors.
**Why This Matters:**For anyone looking to reduce their carbon footprint or optimize energy usage, integrating EV charging with renewable energy is a fantastic step. This setup not only helps in managing energy consumption but also ensures that I’m making the most of my solar panels.
**Final Thoughts:**Setting up this system was a rewarding experience. It combines technology, sustainability, and a bit of creativity. I’d love to hear from others who have implemented similar solutions or have suggestions for improvement. Let’s continue to explore and share innovative ways to make our homes and lifestyles more sustainable!
Cheers,
[Your Name]