I am using X10 CM15A for the controler and a AM466 Appliance Module for the switching. I have a M14A motion dector with a light sensor tweeked with tape to test for bright sun. I am still tweeking the light sensor with tape or I may add a variable resistor in line to get the sensor to tweek to the right point. I am thinking of adding a weeder tech board to the system to have better inputs of temp testing pre and post the solar panels to allow more control of the pump.
Steve