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  • ARDUINO MPPT SOLAR CHARGE CONTROLLER (Version-3.0)

    I think the instructions should be updated to correct the error. As is, its just a matter of time before something burns. Adding a diode to block supply from the battery would be a sensible step until the author decides to correct the topology.I ended up building my own design from scratch. It's fully scallable too. I made a few PCBs and have given them to a few friends. I got carried away but finally have a robust design. It consumes ~40ma with wifi logging. Minimal heatsink ing needed.It can handle 100V on the input and so far have one of them running with 5 * 200w panels. I found electrical protection quite challenging to account for all scenarios including MOSFET and logic controller failures (important as I am away from home for periods at time). But it's solid now.

    A picture of a few revisions. They handle about 15A continuous output and have temperature throttling of the MOSFET long durations above 15A. Starting to get it to fit on one board now.

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  • ARDUINO MPPT SOLAR CHARGE CONTROLLER (Version-3.0)

    Just remove it from the code. Originally I was experimenting with periodically increasing the step size to help find the MPPT point. My idea was that if it got stuck on a local max a periodic step would force it to move and re-evaluate.

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