Mighty Mule FM352 Gate Opener For Dual Gates Up to 16-Feet Long and 550-Pounds Designed for gates up to 16-Feet (4.9 m) long and 550 lbs (249.5 Kg) per leaf AC or Solar powered to meet the needs of 100 Percent of the market. Designed for optimum solar performance with 10-Watt solar panel. Battery Operated - works with an automotive or marine battery (not included) which optimizes performance in cold weather.