"Ed" wrote in message
...
Thank you, Eric, this is a good start knowing that I have to upgrade a
bit.

How about a different route. How about adding a small 20 amp alternator to
the engine to charge the battery? You charge it on the way down with a
short engine run, or on the ground, assuming you left enough in the battery
to start the engine.

It has the added advantage of being able to recharge in flight, if the need
arises.
--
Jim in NC