Ok, thanks for the information. However, is there a battery that is rechargeable by DC current (from a solar panel) but can still be used with a BEC to provide a stable 5v and 3+amps? My idea is to create a system such that the solar panel charges the battery which could be used to power the board in the case of low sunlight. Is that possible? Thanks for all your help!
EDIT: Specifically is there a SBEC that uses NiMH or similar? Thx