Solar Panel 20 Watt High-efficiency Mono-crystalline High-efficiency solar panel contains 18 cells. Impact resistant tempered glass surface allows maximum light transmission Engineered for the rugged location to withstand hail, snow and ice. Weather resistant junction box contains bypass diode and is conduit ready with strip connectors. Max. Power: 20 Watts, VPM: 17.64V, IPM: 1.2A