Batteries provide renewable energy storage, and are required for any remote, stand-a-lone, or back-up renewable energy system. This stored energy runs the household at night or during periods when energy output exceeds energy input. Along with a battery system, you'll need a
charge controller (or regulator) to prolong battery life. The most basic function of a charge controller is to prevent battery overcharging. Real Goods has all your battery and charge controller needs here!
