"The 10-pack of Sunforce durable, weatherproof, high efficiency grid-tied crystalline solar panels is designed for residential and commercial applications. Package provides up to 2400 Watts of total solar power. Requires a charge controller sold separately to prevent over-charging of battery. Panel Type Crystalline, Material Crystalline, Battery Type 24V, Panels qty. 10, Watts 240, Dimensions L x W in. 59 x 39 x 1 6/16, Battery Included No. Each 240 Watt panel features an anodized aluminum alloy frame with low iron tempered glass for years of dependable service Maximum power voltage of 30.54V Open circuit voltage of 37.26V Safe operating temperature range of -40C to +85C Each panel measures 58.90in.L x 38.94in.W x 1.54in.D Includes mounting holes on panel frame"