Featuring the latest state-of-the-art solar panel with superior charging power the Parmak Magnum 12 Solar-Pak eliminates battery recharging, thereby saving you time and money. The sun`s energy charges the fencer by day and a sealed 12 volt rechargeable battery powers the fencer at night. Battery included. The Parmak Magnum 12 Solar-Pak was designed, developed and is manufactured exclusively by Parmak. 100% . Uses the same advanced and exclusive circuitry as the Parmak Magnum 12, including Parmak`s exclusive built-in performance meter. Our totally new and improved solar panel uses free energy from the sun to provide maximum shock. longer life. No operating costs! Power line convenience with a battery fencer.Parmak MAG12SP 12 Volt Magnum Solar Fencer: Solar garden fence comes with a fence charger Solar powered, uses free energy from the sun Low impedance for maximum power, longer life, no operating costs ‘s first solid-state solar powered electric fencer Features the latest state-of-the-art solar panel Solar Pak has all the great Magnum 12 features, plus solar power Complete with sealed 12 Volt gel battery Weatherproof, portable outdoor model Charges up to 30 miles of fence UL listed