E27 Victron LiFePO4 with Smart BMS CL 12-100

What began as a reconnaissance mission to trace some wires to learn how my boat ticks and make sure I wasn’t sitting on a electrical fire waiting to happen has turned into the addition of a dedicated house battery, and an eventual all-out revamping of the entire 12v system on June Bug.

Whoever set up the electrical system and battery bank before I bought the boat did a decent job of joining two 58Ah lead acid “hybrid” starter/deep cell batteries from Costco in parallel, charged by a 3-stage...