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I know this is a bad idea as the charging circuits are meant for lead acid. But assuming you use a brand with low temp charging protection, will it work? A chart shows at 14.6 volts the battery would be full. Automobile alternators and DC DC converters use 15 plus volts to charge their...

What I have noticed is that a residential solar install has all these unnecessary people with their hands out. The solar install company, the local county code, the power company, and the local guild of electricians at a minimum. And yet signature solar will sell us bifacial panels for dirt...

So I noticed many people complaining of bugs in parallel mode, and I noticed it requires a rat's nest of wires and setup. (for both the MPP and growatts brands) So I thought : why not use a large 12k watt split-phase ffor the 'main' house inverter, and put the EV charger on a separate 1...

So there are a bunch of system level things a full off grid system would need that end up all being a decision to switch a relay. Main 48v Battery voltage under threshold? Generator start relay. Generator already started? Starter relay off. Main 48v Battery over threshold? Relay to...

Downside: no warranty, long wait. Upside: these server rack batteries probably all come from the same factory, they look suspiciously similar. So it means you probably get a decent quality battery no matter the variant. Example...

So I was playing with pvwatts and I noticed that if you want max power in the summer months you face the panels straight up (like Will does), if you want more power on winter you angle them up. So the obvious thing to do if you have an off grid cabin or something in northern climates is have an...