RA-6 - Daisy Chain Accessory Maximize your charging power. The RA-6 allows you to connect several PowerFilm® chargers in parallel for increased current output (amps). By connecting multiple panels, you can achieve a combined output of up to 20 amps. RA-8 - 15' Extension Cord with Alligator Clips Protect yourself from being stuck with a dead battery, thanks to the RA-8 extension cord, which can conveniently connectto a car or boat battery. Includes professional marine-grade components ready to attach to your PowerFilm Solar Panel. RA-9 - Charge Controller Regulate your battery charge and protect from overcharging with the RA-9. It features 100% solid state electronics. All power switching is done with MOFSET's - no mechanical relays are used. Rated 4.5 amps @ 12V. RA-11 - 15 ft. Extension Cord with o-ring Battery Terminal Connectors The perfect solution for semi-permanent battery charging applications. The RA-11 extension cord features ring terminal ends, plus an extra 15' of range.