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Old 11-22-2022, 04:53 PM   #35
tiltrider1
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As I mentioned in post #19. His best option is probably to run a second independent 30a line into the boat just for some heat.

It can be done very inexpensively as long as it’s kept independent of the primary system. He could put the heaters on a rotary switch that allows them to either source the 50a or 30a shore power. This would give him the best of both worlds.

The second line would not be on an isolation transformer. However, with just the heaters on the second line you could avoid the need to combine the grounds between this system and the rest of the boat. If you added a rotary switch make sure the grounds get switched as well.
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