It's a good idea to not use resistance heaters (coffee pots / hair dryers etc)and large power consuming (microwaves etc) appliances when off the Shore Power
All of that gear is for Power Boats with Automatic Generators
Our House Battery systems are designed for Cruising use of low power
consumers like Lights / Electronics and intermittant use of Fresh Water Pumps / Bilge Pumps. The largest electrical consumer will be the Fridge at
2-3AH average, which gives you about (2) days running before recharge
on a (2) 125 AH-6V House System. Running an Invertor for a Coffee Pot
doesn't really fit in to these small boat systems design limiations :nerd:
You would need to start the engine every time you wanted to use an
Appliance ! Also...get a Fridge with 12V Compressor to avoid invertor loss
Good Luck