The Sun Came Out

Whoohoo! The sun came out today and the collector ramped up to 110F. It was nice to see the pump pumping and the tank slowly warm up. Controller claimed only a couple KWH generated today, but it was below 32 this morning and only reached 40 or so. Pump seems to be short cycling in these conditions...maybe pumping to fast? I might try the medium speed setting to see if the system behaves differently. It's a Grundfos three speed with an external speed switch, easy to switch.