How Much Energy Do Drainback Solar Water Heater Pumps Use?
One question that a lot of people interested in solar hot water heaters have is “how much energy do the circulating pumps in a drainback solar hot water heater use?”. Since the pump is only on for a few minutes each day the cost is less than two dollars a month. I recently tested a drainback solar hot water heater using a Kill a Watt power meter. If you don’t have a Kill a Watt, get one so you can find out what is wasting energy in your home. You can find one at Amazon at the link below. The Kill a Watt, left plugged in, with the solar controller and pump both plugged into it, for twenty four hours on a sunny day, showed only .5 Kwh used. If your energy costs you ten cents a kilowatt hour, this means the solar water heater pump will cost you about five cents a day. Not too bad, for nearly free hot water! The Kill A Watt Power Monitor. Click On The Photo For More Info (link to Amazon.com page) .
