Do you have a solar controller? It will do the work for you, only opening the solar valve when heat is available and needed. I run my VS pump from 8a to 10p at 1100 rpm on solar standby, skimming and making chlorine with the SWG. When solar heat is available the solar controller ramps up the pump speed and opens the solar valve. It allows you to set a high point, we have ours set to 93.