Our most durable charge controller, the CEP220 is fully potted, IP68 waterproof, and features a heavy duty aluminum casing with heat sink fins for maximum heat dissipation. Extremely capable: Used in our Fortress solar generator, the CEP220 has a input voltage of 50V max and can charge SLA, AGM, Deep cycle lead acid, lithium iron phosphate (LiFePO4) and 3S Lithium Nickel Cobalt batteries like our lithium ion nickel oxide batteries. The CEP220 also features a 20A load output which makes it perfect for lighting applications. Prewired silicone insulated wire leads allow for fast installation. Wire leads are 10AWG 10ft long and include 5/16" ring terminals.