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Old 02-14-2019, 08:27 PM   #6
motion30
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Join Date: Jan 2010
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Quote:
Originally Posted by wkearney99 View Post
Do a google search on 12v for water heaters in RVs. There's more and more overlap between RVs and boats these days. The consensus I got was it's a lot less trouble to just use AC. Especially if you're powering this with excess wattage.

If you really wanted to be efficient for hot water it's better to just use a loop of tubing through a solar water heating panel. Much better energy transfer straight from solar to the tank. But that's not likely practical on a boat.
My buddy installed that system on his sailboat. He only has one water heating panel and it works well in the summer oh, but it's not quite enough in the winter time in South Florida. I think the installation of another water heating panel would be enough. on my boat routing the plumbing from the hardtop to the bilge would be problematic
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