Good control of your solar water heating circulating pump with appropriate set points can make a big difference in the efficiency of the solar water heater.  On my system I set the turn ON point for the pump when the temperature of the collector rises 6 degrees C above the temperature in the bottom of […]

We have been having some pretty cloudy weather lately, and that has been a challenge for those of us who depend on our solar hot water systems. But I have noticed that even on days when there is cloud cover all day we still make some hot water. I read where the evacuated […]

Today, here in the mountains, was overcast and light rain on and off all day. But the solar evacuated tubes out back made hot water off and on all day. Sure enough the water was not scalding hot but the collectors made water that was warmer than what was in the bottom of […]