WindyNation 10 Watt 10W Polycrystalline 12V 12 Volt Solar Panel Battery Charger &ndash; Boat RV Gate Off-Grid 10 Watt solar panel provides up to 10 watts of clean, free, renewable power Designed for maintaining (trickle charge) 12 volt batteries in RVs, cabins, boats, battery operated gates, back-up power and any type of remote battery power use Perfect for 12 volt battery charging (see pictures in photo gallery for solar panel technical specifications and dimensional drawings) 10W solar panel can provide 35-70 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 with solar cable and blocking diode attached.