"Hobbs" wrote in message
...

In summary - you will probably need more panel output if you want the
panel to recharge rather than maintain a charge. I'd suggest 20-30 watts
might be more like it as a minimum.


One other thing - if you have enough solar cell capacity to do a useful job
of charging then you also need a way to control the output of the solar
cells once the batteries are fully charged. So you'd better also budget for
a solar panel regulator.

Good luck with the project