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I finished building the MPPT charger. I'd go install it and test it out if it wasn't 119 outside right now. The voltage monitoring is working well. It was pretty noisy and had an offset of a few volts. Now, it's accurate to +/- 0.05 volts. So, since my output needs to be around 55.2v when done charging, it will stop around 55.15 or 55.25. That's good enough. There's just a tiny bit more wiring to do. I'll start with 1 string of 5 panels, for a total power of 5*280 watts. First, I'll charge the batteries with the inverter off, and then I'll turn the inverter on at the same time.
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