Power is always in short supply when not in a marina and connected to the mains. Various systems are adopted by sailors to compensate for loss of power. Historically the main system was a wind generator, but recent improvements in PV technology means that solar is becoming the go to system to replenish power offshore.
I do have a very powerful alternator on the main engine and a second less powerful, and a really good generator, which top up the batteries quite quickly, but obviously call on diesel to run, which on long passages may be needed for propulsion if we become becalmed.
So I set about fixing arches to the davits and solar panels on top. I now have the capacity to produce 600w in good sun, which will make us nearly self sufficient in power, if the sun shines!
Carioca Sailing 