I live in the ship the whole year. From 1. april - 1. november I am at a mooring. The rest of the year I am slipped at the local diesel distributor that is closed in the winter.
Electricity is a challenges, so I use a generator (2,5 KW) that works around three hours a day. Usually during the evening when I am looking at TV or using the computer any way. That takes care of charging the batteries (440 amp/h) and heating of the water for shower and dish washing/clothes-washing. If I need to use power-tools during daytime the generator takes care of that as well.
The generator is an inexpensive one, so the current is "filtered" through a 1500 watt pure sinus inverter for delivering power to the applications that demand (clean) 220 volts, like portable computer, TV and some of the power tools.
Rowing the dinghy ashore for shopping takes care of the surplus weight.
Use your head, ram the wall till it falls.