Solar Water Heater - Passive - Build/Install Breadbox (Video)
Solar water heater - Passive breadbox - build and install. Preheats water before the water goes to the regular water heater. Plans/design by Jeff Tiller. No pumps or moving parts other than valves and shutters. In the event of leaks or freezes in the solar water heater, the solar system can be bypassed and just use the regular system to heat water. There was no eligible tax refund for this system in the state of Georgia in 2012. Only federal refund of 30% as shown in the video which was nice.
No claim on the temp of the water as I only have a thermometer that reads air temp in the box and the tanks were painted with 'solar' paint to help keep the heat in the tanks. Air temp in the box routinely (April - October) goes to 140 degrees on sunny days, especially when sunny between 10 - 2 o'clock.
Since two tanks in the box, there is more hot water than a single40 gallon tank, but just not as high a temperature. This works well with a 50 gallon Jacuzzi. There is a goodly amount of hot water available on sunny days. This can be seen in that the box starting out at 140 degrees or more before the bath is still above 100 degrees after a 50 gallon plusjacuzzi bath.