Portable Sun Tracking Solar Panel With A Windup Clock Drive

Step 6 Basic lead-acid battery power station:

A 12 Volt, 8.5 Amp-Hour sealed lead acid battery pack (a good match for the 12 Volt 12 Watt solar panel) is connected to the solar panel. The portable battery pack has an internal charge controller that prevents the solar panel from overcharging the battery. Lead acid batteries are also far more tolerant of fluctuating solar panel voltages than other types of battery packs. And the new breed of high rate sealed lead acid batteries have twice the capacity of those produced in the 1980's, making them a better choice than lithium-ion and nickel-metal hydride battery packs. The battery pack rests on a special, moveable rack, to provide heft and stability against gusting winds.