I get so confused when it comes to electric power, especially battery
output. How many AMPs can a battery put out before the battery is dead?
Say, a 12 volt battery. Could you put this as .. "if you have on a light
for xxx hours the battery is gone".

I know AMPs are the flow of power and volts is the possible amount ..
measure of flow and time . and light bulb.

Why am I asking? I was looking at this boat on a web site and the owner had
added a bank of small batteries. About half the size of the marine ones I'm
use to. The batteries were tied together so they became on big battery in
power possibility.

Now,, if he had 6 batteries and each one is an 8 volt .. does this mean he
has 8x6 = 48 volts of possible power? And how does this work out to amps. ?

batteries are heavy. how many do you carry. wouldn't a bunch be bad for
the boat??

also.. solar power.. how much power does one of those things give you?

thanks,