"Go" wrote in message
oups.com...

However, for an in-flight use, where the pv is basically augmenting the
battery supply a charge controller isn't needed.

Until somebody forgets that there is no controller and the glider happens
to spend a few days out of the trailer...

I have ruined enough batteries from overcharging to have finally had the
lesson forever drilled into my head; charge controllers are cheap and necessary.

With longer term
charging & sustaining an inexpensive controller is essential if you
want to get the full life out of the batteries.

I agree.

Regards,
Vaughn