I recently received one of these. I've yet to incorporate it into my setup but I just had to comment on it. after a test run This is designed to wire in line between your batter and the linear actuator for up down operation. I have tested it with an actuator and it works great. A press of the up button extends the actuator (if wired correctly),it will keep extending until it reaches the limit or you press the down button. A second press of the down button moves the actuator the opposite direction and will continue to move it until it reaches the limit switch or you stop it with a press of the up button. So it is possible to move the actuators to any position from fully extended to fully compressed. My reason for getting this was to incorporate it with the SunTura but it would work fine on its own. If your solar array doesn't have a tracker but you have to move your arrays N/S position each season this would be a nice add. Also I believe this will be handy in areas that receive lots of snow, the right tilt can make snow removal an easy chore!