The Sunforce Products 24V module delivers 170 watts for grid-connected systems. U.S.A. Application: Grid connected systems, Watts: 175, Dimensions L x W (in.): 32.5 x 62 x 1.8, LED Light: No, Material: Watertight tempered glass, EVA laminate and aluminum frame, Panel Type: 125mm multi-crystal silicon solar cells, Panels (qty.): 1, Battery Included: No 125mm multi-crystal silicon solar cells offer 12.68% module conversion efficiency Advanced surface texturing process increases light absorption and efficiency Subdued, natural look Bypass diodes minimize shade power drop Charge controller required for battery charging (Item# 121150 or 121138 recommended)