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Thank you for all of this information, I very much appreciate it. And great points about all the gotchas.. I suppose it's like an RV -- you have all the problems of a house and all the problems of a vehicle, neatly rolled into one :)
Converting to an electric motor is interesting to me (if I understood correctly). I guess I never thought about that as an option, it makes sense on a sailboat for sure -- what kind of battery setup does that require? And if you want to be free of shore power for your other electronics, I suppose that also makes a lot of sense.
I think my boat office will remain a dream, but it's a fun one to entertain.
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.