Harness solar energy to continuously recharge the 12V battery (sold separately) in your boat, RV, ATV or emergency backup with the Nature Power 3W Semiflex Monocrystalline Solar Panel Battery Trickle Charger. The wafer-thin, high-efficiency panels are light enough to mount on a window with suction cups (sold separately), can mold to a curved surface and are strong and durable. Waterproof and resistant to weather and corrosion. Provides up to 0.3 amps of power. Includes battery clamps and a DC plug.