Nature Power 7.5-Watt Solar battery trickle charger takes the sun's energy and turns it into electric current and delivers a small current to your rechargeable 12-Volt batteries. This solar panel is a way to keep your vehicles batteries topped up during storage. A great alternative to traditional battery chargers since no AC power is required, you will not need to run extension cords or use up valuable driveway space for stored vehicles. Completely weatherproofed this solar panel can be installed outdoors permanently or temporarily using the included poles for tilting the solar panel towards the sun. Mounting hardware is included. Nature Power solar panels feature a sturdy aluminum frame and toughened glass top and are safe for temperatures ranging from -400F to 175F. Low current from this solar panel make it safe for your rechargeable 12-Volt battery, no charge controller required. Installs with ease and is maintenance free.