Good question. It all depends.... Ice box is good = no power.
How much time do you spend camping without power or being
hooked up to the tow vehicle? My Trillium
has a 130Amp Hour
Trojan deep cycle battery
. With just lights
(LEDs) and a satellite
entertainment radio... probably used about 5 to 10 Amp Hour per
day... so it is easy to go close to a week and not worry about
charging the battery
. When hooked up to the tow vehicle for
a while the battery
is fully recharged.
I use a ham radio while camped so need more power. I built a
system with a 150 watt panel and a good controller.
Total cost was about $400 to $500. Unless there is no sun I can
use a lot of power and the system is fully recharged every day.
Hope this helps....