REALLY new to this
If you intend to use plug in 12v appliances with ''cigarette'' type sockets you will need to have a 12v ''cigarette'' type sockets installed if you do not have one on board already. These are pretty easy to install but will require an additional circuit breaker on your electrical panel.
The other issue is having adequate battery capacity and charging ability. Most small overnighters like the Catalina 22 have limited battery capacity and heat developing devices like an electric coffee pot require a more battery capacity than would normally be found on a small boat. Beyond that most small boats have outboards with limited charging capabilities making recharging from a high draw application pretty difficult qith normal outboard useage.
Most Catalina 22''s have small alcohol stoves which are a more efficient way to make coffee. We use a small Italian expresso pot but there are a wide range stove top coffee pots available out there.