mariah @data.potato.engineer · Nov 22 Batteries! LiFePo4 (lithium iron phosphate) is ideal (most stable, longest-lasting... expensive) but even car batteries will do. You can get 12V, 24V, 48V, or even higher (V) batteries. 12V is what cars use. I like 24V for home + RV use. Get 4,800+ watt-hours of batteries (24V/200Ah or 12V/400Ah)
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An all-in-one inverter charger. These are dead-simple to work; just wire up the panels and battery and you're off to the races. Mine was $540. They make them $$ but for a small system this serves well. The unit you pick must match the voltage of your battery. Mine is for 24V.