sizing solar panel

Hi
I can only confirm that the Strobl units are far superior to many other
units as I am using them on my DUO. 1to1,5 hrs in the sun in the
morning usually recharges the 7amp Batterie completly (which you use to
start flying with) you switch to charge the other batterie during
flight and you can keep on switching them like this and you usually end
up a long day with 1 Batterie fully charged and the second one down to
about 12.5V. This is especially handy if you are using the transponder
as well. Sofar never switched more than
once during a flight. A Strobl Solarpanel on the Trailer to charge a
portable Buffer Batterie is the Cherry on the Cake. We fly with
Solarpower so lets charge our Batteries with Solarpower.