On the sailboat all of our power needs are provided by the solar panels. That said, our biggest power user is the chart plotter/radar, which draws about 2 amps when it is operating. On the hook, we generally use very little power. All our lights are LED and we don't acutually use them much. My wife prefers candles. I was pleasantly surprised to find out how little power the electric winches use. We only use the windlass when the engine is running. We don't have a lot of the gadgets that many people do. I take my phone on the boat, but only as a back up for emergencies. It is off unless I need to make an emergency call, which has never happened. Our sound system is a battery powered radio and we generally use the handheld VHF, not the ship's radio. I think we transmitted once last year.

On the powerboat my solar panels keep up with the bilge pumps and refridgeration just fine unless it is cloudy for more than a day. Then I turn the refer off. At anchor all we have is lights (all LED), the refridgeration, the webasto heater and the presure water system (off unless we are actually running water). The Webasto is the biggest power user. That said, we have never gone over 30 amp hours in a day and that was on an October day when the Webasto heater was running for about 6 hours. Even in the Fall, the solar panels nearly keep up with all our needs. I am going to upgrade my battery capacity in the Spring to 400 amp-hours just to be sure