The Sunforce 50032 15 Watt Solar Battery Charger gives you another reason to love the sun – it’ll help keep your 12V batteries charged. Just plug this helpful 15 Watt battery charger into your vehicle’s 12 Volt lighter socket and position the panel to pick up the most daylight possible or connect directly to the battery with included battery clamps. Made of durable ABS plastic and amorphous solar cells, this unit comes with built-in blocking diode technology that protects against battery discharge at night. You can also use this device to maintain the charge on any 12 Volt battery for clean, silent operation of various electronics, such as, deer feeders and pumps. The 50032 is a great choice for automobiles, recreational vehicles, tractors, all terrain vehicles, boats, electric fences, telemetry and more. The amorphous solar panel is even effective on cloudy days! The complete unit includes all wiring and accessories needed for installation. With a maximum temperature range of -40 to 176-degrees Fahrenheit, this unit measures 15.5 x 2.5 x 41.5 inches (WxHxD). The manufacturer recommends using the Sunforce 60012 7 Amp Charge Controller in tandem with this charger for optimal results.