I don't think charging the batteries (Lipo) is a good idea... I think the only batteries that can handle the currents would be A123's... but then again, it would be for a short period, so who knows, maybe it could work?
“The modern astrophysical concept that ascribes the sun’s energy to thermonuclear reactions deep in the solar interior is contradicted by nearly every observable aspect of the sun.” —Ralph E. Juergens