Why!, would be the first question to answer.
Solar panels are the power source of LAST Resort.
Understand that a ~100 watt panel is going to be about a square yard in size.
100 watts is less than 10 amps at 12 volts.
It will only deliver the full rated 10 amps under a full, dark blue sky, at noon, with the panel purposefully pointed South, and tracking the moving Sun.
The advertising guys were not lying about its specifications, the just left out all those important details.
If you Mount the panels horizontally, pointing straight up, and you live North of Miami; You can expect to only collect the equivalent of 2-3 hours worth of Sun energy on a cloudless day. Even less if it is hazy, and much less if it is cloudy/overcast.
You could use it to recharge a battery if taking a a few days to do it is acceptable.
There will not be enough power to operate any significant equipment for more than an hour or so.
If you have access to Shore power, Alternator power, Generator Power, Or possible even Wind power; they will be a better choice.
Now it you are on a sail boat, and a few days from shore, the Solar option starts to look better.
But even sail boats usually opt for the Wind Power solution to charge a battery all day so they can have lights for an hour in the evening.
