I see a safety hazard with the exposed battery terminals (as shown in the picture "A 12 Volt 230 Ah lead-acid battery"). AFAIK, lead-acid batteries are less pow

I see a safety hazard with the exposed battery terminals (as shown in the picture "A 12 Volt 230 Ah lead-acid battery"). AFAIK, lead-acid batteries are less powerful than Li-ion/LFP but would probably still start a fire or give nasty sparks if something metallic falls onto the battery. (I'd be happy to be corrected.) > The drawback of a 12-volt system is the relatively large currents required to charge the battery and power the inverter. This requires thicker, more expensive cabling to prevent energy losses in the cabling. Arguably it's only for the discharging via the inverter that you need the thick cables, as otherwise they don't need to be thicker than the cables from the panels. (The current for charging could be much lower than the maximum discharge current.) -- Except if the MPPT steps down the voltage from the panels to the battery by a lot.