Is your inverter big enough to handle the hot water heater?

Hot water heater is AC 120V. Water is also heated via the engine. Ran the
engine for about 10 minutes and got "warm" water. I'll probably never have a
use for it. The sun shower uses less power. We spent two hours cleaning the
freshwater tank. Just for handwashing and cleanup.
Couldn't really test the ho****er heater itself for long as lightening hit the
power transformer at the marina and knocked out power!

RB