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Happy to help. And you nailed the simile. Add in: the water is always trying to get in and, in the case of saltwater, always tearing things apart. Also, UV light is constantly attacking everything. UV embrittlement is a tireless enemy.
I did the hull speed and endurance modeling based on a 600Ah 48v nominal LiFePO4 traction bank. The banks that I built are 8 discrete banks of 16s 100Ah LiFePO4 cells (so 800Ah, 48V nominal), each bank with its own BMS and cell-leveling. Each bank has its own charge and discharge contactor (think: relay switch on steroids), with all banks connected to separate charge and discharge common buses. The banks can be charged by solar, regeneration (sailing the boat), and shore power. Shore power is handled by a 4000W inverter-charger + isolation transformer, although I only have it linked up to a 30A shore power inlet. Two banks of bi-facial solar rated for 1800W total feed into two MPPTs connected to the common charge bus.