I was reading about other peoples solutions, and it seems to be assumed
that everyone has, and knows about, the King, "Pic a watt" heater.
First I have heard of it.

A web search shows www.boat-electric.com, but there is no price or link
for purchase (unless they hide it and I'm not smart enough to find it).
Great business model that is.

I know the folks over at Boat Electric.
Good people. Maybe not the world's best webmasters.

You won't get any better service from anybody.

They have a toll free number: 1-800-458-5680.

Ask for Lori or "Ski".

They'll take good care of you, and from what I have heard the Pic a watt is a
very good electric heater