I would like to setup a solar charged/battery storage system for an RV/small camper environment.
Initially with one solar panel, one matched battery pair; but also allow the battery(ies) to be charged from 120VAC and/or auto alternator when available. I expect to add additional batteries and solar panels matched appropriately.
I expect to use only 12VDC powered devices in the RV, so no need for an inverter. I do not expect to try to power lots of gear at once.
I see lots of solar/battery setups, but none seem to include recharging by 120VAC and auto alternator in addition to solar, nor 12VCD loads exclusively.
Are there any special requirements for wire sizes depending on run length from solar panel to batteries? to charge controller? etc?