If I am reading you right, apologies if I am getting your point wrong, you are proposing using 120v DC from the batteries to run standard AC appliances as well as the drive motor. This can’t be done, DC and AC systems must be separate. Also, 120vdc system voltage is doable, but much less standard than 48v which is a common voltage in larger solar systems.
Further, it is generally accepted that 48v is the highest relatively safe voltage, above that you have to be much more rigorous about your wiring and moisture protection. The difficulties of higher voltages are not insurmountable but if you want a system that is safe and insurable, you’d be better off going with 48v as it is safer and more standard than 120v.
120vdc as from a battery will not run most standard AC appliances, you’d have to use an inverter to make AC from the DC and that would run the AC house loads. The wiring for AC and DC follows different standards, for a 120vdc system every plug and connection would have to be esoteric and coded to disallow connection to any normal appliance. This negates any convenience gained by having the AC system and DC system the same voltage.
Further, it is generally accepted that 48v is the highest relatively safe voltage, above that you have to be much more rigorous about your wiring and moisture protection. The difficulties of higher voltages are not insurmountable but if you want a system that is safe and insurable, you’d be better off going with 48v as it is safer and more standard than 120v.
120vdc as from a battery will not run most standard AC appliances, you’d have to use an inverter to make AC from the DC and that would run the AC house loads. The wiring for AC and DC follows different standards, for a 120vdc system every plug and connection would have to be esoteric and coded to disallow connection to any normal appliance. This negates any convenience gained by having the AC system and DC system the same voltage.
Generators (normal ones at least) only make AC which would have to be converted and controlled to charge batteries or run a motor.
AC motors can be speed controlled, but the electricity needs to be converted from AC to DC and back again, losing efficiency and adding complication.
24kw is a lot, that’s 480 amps at 50v, you’d need big wires, but you could go with 72v, which is a common system voltage in dc drives if you really need that much power. That would take the amps down to 330, which is still big but not too bad.
Consult with the thunderstruck people, they’ll get you sorted out.
That would be a great boat to go electric with, you’ll have plenty of room for batteries and solar!
AC motors can be speed controlled, but the electricity needs to be converted from AC to DC and back again, losing efficiency and adding complication.
24kw is a lot, that’s 480 amps at 50v, you’d need big wires, but you could go with 72v, which is a common system voltage in dc drives if you really need that much power. That would take the amps down to 330, which is still big but not too bad.
Consult with the thunderstruck people, they’ll get you sorted out.
That would be a great boat to go electric with, you’ll have plenty of room for batteries and solar!
anton
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