This is a hypothetical situation but it’s winter here and the boat’s in storage, so... Here I am, sitting on the boat, at anchor. No shore power, but the 370W PV is keeping the LFP bank happy via the Victron 100/30 MPPT. I control both the starter/engine bank (FLA) and the house bank (2 100AH Battle Borns in parallel) with a 1-2-All-Off switch. BUT, I forgot to switch the circuit to “2” (house bank/LFPs) when I anchored, and the loads drained my FLA engine battery. The Orion 12/12-30 is off because the engine is off. Can I switch to “ALL” to allow the LFPs to push amps into the FLA battery to give it enough juice to start the engine? Yes, I’d measure the voltage at the FLA battery to be sure I had enough power to start the engine without compromising the LFP bank. Advice and suggestions, please?
