WindyNation 60 Watt 60W Polycrystalline 12V 12 Volt Solar Panel Battery Charger &ndash; Boat RV Gate Off-Grid Perfect for 12 volt battery charging or wire multiple panels in series for 24 or 48 volt battery charging 25 year power output warranty and 5 year warranty on parts and labor UL 1703 Certified Solar Panels are ideal for off-grid applications High transmission tempered glass. Designed to handle 1 inch diameter hail traveling at terminal velocity and anodized aluminum frame Solar cable and MC4 Connectors come pre-attached to the solar panel for a quick and easy installation