When searching for a solar pump consumers are presented with a number of options from sellers on Amazon, Ebay, large European pump corporations, local outfits and of course, RPS.

Sellers on Amazon and Ebay fall into the lower price range, $100 to $500, rated as 12V and use low quality brushed motors (read: motors that wear out within a year). These systems are also typically sold as “Direct Connect”, connecting a pump directly via wire to a solar panel. The pump will run, but only under completely ideal conditions. When the pump attempts multiple times to turn on under low light conditions, in early morning or later afternoon , that behavior ends up quickly burning the motor. This is because the pump requires quote a bit of current (measured in amps) upon start up. NO ability to use AC grid or generator backup power.

With an RPS solar pump, controllers are required. Our smallest system is 24V and goes up from there, uses brushless permeant magnet motors for continuous operation, and connect panels to an MPPT charge controller that then connects to a pump. Our controller have improved upon traditional controllers with some great new technology and new features. An MPPT controller allows the pump to operate even under less than ideal conditions using the Maximum Power Point function to optimize the running of the pump motor with variable frequency based on available power. With maximum power point tracking (MPPT) the controller monitors solar panel performance and makes adjustments as needed to the voltage and current in order to maintain maximum performance. The MPPT feature improves overall system efficiency, especially in low light, overcast conditions. The controller is integral in the “slow start/ slow stop” function that slowly ramps power to the pump up or down, eliminating the possibility of mechanical damage from torque upon start up. The RPS Optimizer controller also features low well shutoff and storage tank overflow sensors that some customers utilize. These will save the well from running dry and prevent over pumping and wasting water. There is also a Motor Speed setting. The motor speed setting on the RPS controller is a dial that adjusts the speed at which the pump operates. The pump can be set to operate at any speed desired and can be fine-tuned up or down to the amount of water needed on a daily basis. The RPS Optimizer controller is encased in a water resistant enclosure and is suitable for outdoor use. It features water resistant wire pass-through ports on the bottom, to prevent both moisture and bugs from entering the electronics. Special ability to connect up AC grid or a generator as backup power, made possible by a separate affordable converter accessory. Power and external sensor connections are made easy by the use of clamping screw terminals. Only a screwdriver is required to make the electrical connections to the controller. Dimensions are about 8 inches wide by 9 inches tall.

Controller Specs

Check out our Universal pump Controller Spec sheet for more details about what makes the RPS system so unique.