Our large 12 volt system, comes with a high torque motor and the swing door slinger. Uses a 12 volt rechargeable battery and has knock outs for the Boss Buck box mount solar panel or a traditional barrel mounted solar panel. Heavy duty steel mounting plate and 1/4"-20 thumbolts quickly attach and detach from the Boss Buck non-Typical 350, 600 or 1200 series feeders. Our design allows for the solar panel to be positioned even after the feeder has been filled. Simply rotate the Conversion kit to the position receiving the most ambient sunlight each day for optimal results. Timer holder allows the timer to stand upright.