Nature's Generator is comprised of two natural ways to generate free electricity - solar and wind power. The Nature's Generator Gold System couples the power of the Nature's Generator with a Nature's Generator Power Panel. The Nature's Generator stores electrical energy in its internal battery and uses state-of-the-art electronics that convert 12-Volt power to 120-Volt everyday household electricity; it provides 720 Watt hours of run time. The Nature's Generator does not require gas to run which makes it the perfect emergency and backup power source for use inside your home. With the included Nature's Generator Power Panel you can keep your system charged and ready to go essentially creating your own solar power production plant.