Should I use my 12v cabin lights while I am at the dock? The onboard charger is plugged in. Will this ruin my battery?
On the topic of chargers and lighting, I'm was an electrician in the Navy and should know this, but don't:
My first night on my boat (last December), I checked my charger because ... well, long story full of problems. The point is, my 120-12 volt converter is putting out amps, but the voltage output is only 10 volts. I don't understand: in order to charge the batteries -- which it does seem to be doing -- doesn't the voltage output have to be greater than that of the batteries, which varies at times between 12 and 14 volts?
Am I an idiot ... or a big idiot?
My other related question on lighting is this: I am a liveaboard and need more lighting. Should I install 120 volt since I am always on marina-paid shore power when in port; or should I install more 12 volt so that, when sailing, I can use it? Advise anyone.