Model SCC515-5: 12V Controller w/5 Watt Panel Solar Battery Charger optimizes all solar panels charge rates. It actively monitors your battery's voltage any time the sun is up. It features exclusive U.S. Patented high frequency Pulse Mode desulfation circuitry, designed to safely reverse and eliminate battery sulfation, the #1 cause of early battery failure. The internal program adjusts its output several times a second based on this reading to quickly and correctly charge your battery. When used as a maintainer, the BatteryMINDer will maximize your battery’s life and storage capacity. The long-term float (maintenance) stage can add years of service. This solar battery charger/maintainer/desulfator prevents over/under charging. It also safely extends the life and performance of all batteries. Solar battery charger SCC-005 works with all sizes, types and brands of 12V lead-acid batteries including, but not limited to: flooded (filler cap / maintenance-free / VRLA / SLA), gel, AGM (Optima / Odyssey / etc), starter, deep cycle and hybrid.