WindyNation 30 Watt 30W Polycrystalline 12V 12 Volt Solar Panel Battery Charger &ndash; Boat RV Gate Off-Grid 30 Watt solar panel provides up to 30 watts of clean, free, renewable power Designed for maintaining 12 volt batteries in RVs, cabins, boats, battery operated gates, back-up power and remote power use Perfect for 12 volt battery charging (see pictures in photo gallery for solar panel technical specifications and dimensional drawings) 30W solar panel can provide 100-200 Watt Hours of power per day (depends on sunlight availability) Grade A solar cells; Heavy duty anodized aluminum frame, 5 year warranty on parts and labor, Delivered ready for connection!