just did a search and I think I got it covered, still if some with
experience would like to comment please do.
Udo
"Udo Rumpf" wrote in message
. ..
If I want to maintain a 12 volt 7amp/h Battery with a solar cell panel
what rating would I need during flight, if after 4 hrs I wanted
to have a usable, not full, charge in my 12 Volt battery.
Right now, my as good as new battery is useless after 4 hours.
and what size would the panel be?

Udo