[Edited Message Follows]
Simple system, fairly standard practice:
battery- Motor controller- motor
generator - battery charger (or inverter/charger if 120vac is needed) - battery
solar panels -charge controller - battery
a separate 12v system can be as simple as a dc-dc converter that converts traction battery voltage to 12v, but could also be a 12v battery with solar and a dc-dc to charge it from the traction pack, and a charger to run off the generator or shore power.
al three systems are basically stand-alone and can operate separately and simultaneously.
Voltage is decided upon based on power level but 12v means 4x higher amps than a 48v system and will need larger wires controller etc.
again, 120v battery will be dangerous in a marine environment. 72v is used, but notice the level of protection and quality of components in a 400v EV, it is difficult to achieve safety at that high voltage.
note that even with a 48v battery and 120vac you have to follow wiring and connection and grounding rules to not have safety and reliability problems.
note that even with a 48v battery and 120vac you have to follow wiring and connection and grounding rules to not have safety and reliability problems.
anton
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