on a 28 foot trailable power/sailer which has an 800w 25 litre electric
hotwater system designed for shore power
as engine propulsion
is by outboard
so no engine heat exchanger
the system by a Honda
EU 2.2 generator
which I generally only need to run for about an hour every second or third day using the surplus power not required for recharging my tiny 168 amp portable lithium
battery bank.( The yacht also has an AGM
battery) I only have 320w of solar panels
(partially shaded) yet cook via an induction cooktop and have compressor refrigeration
and have no lpg or propane
or power bank heat the 25 litres in about 35 minutes.
The generator only uses about a litre per hour and I choose to run it when motoring adding very little additional noise
The battery unit can be controlled by phone
app so is safely in an under settee vented box as shown.
A very flexible arrangement with other uses for both the generator and my portable lithium battery/ inverter/ high speed charger/ solar
controller unit with both coming off the yacht for other home and camping uses.
Ultimately cheaper and more flexible than huge built in battery banks supported by large fixed solar
arrays and safer than having lpg/propane gas onboard in my view.