WindyNation 2pcs 100 Watt Polycrystalline Solar Panel Off-Grid 12 Volt (12V) Battery Charging for RV Boat Two 100 Watt solar panel provides up to 200 watts of clean, free, renewable power Designed for RVs, cabins, homes, boats, back-up power and remote power use Perfect for 12 or 24 volt battery charging (see pictures in photo gallery for solar panel technical information) Two 100W solar panels can provide 600-1200 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.