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solar water heater, solar pool pump

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Posted by doug on August 20, 2006, 12:08 pm
I'm contemplating the next step in our families contribution to
reducing global warming.  Does anyone have any experience with solar
water heaters?  We live in the hill country of Texas, lots of sun.  I'd
like to also consider a solar powered pool pump.  My biggest concern
with a water heater, is does it really work???  Can the tank store
enough energy from the previous day -- will we have hot showers first
thing in the morning before the sun rises?

we had a lot of success with insulating the attic, ducts, and putting
in a new high efficiency heat pump back in January -- between that and
a few other improvements, we've cut our electric bills in half
comparing 2005 to 2006 (January through July).  The biggest electricity
use left in our 2400 sq foot all electric house is the pool pump,
followed by the water heater.  So that is what I'll focus on next.  I'm
estimating our 2006 electricty usage will be about 19,000 to 20,000
kwatt hours total.  I think we can get that down to 10,000 kwatt hours
annually, or 27kwatts per day.  I figure that would be a good start
towards our families contribution to reducing CO2 emissions and helping
out with global warming.
- Doug

Posted by dold on August 20, 2006, 6:52 pm


Pool pumps draw too much power to run on a cheaply installed standalone
PV system.  I think it makes more sense to tie them into a whole house
system, where you take advantage of the solar when the pool pump isn't
running.  If you can grid tie on a Time-of-use net metering system, you can
send energy to the grid during the day, and run the pool pump at off peak

Wander around http://www.dsireusa.org/  to see what is available in the
areas that interest you, in terms of incentives and rebate programs.

Clarence A Dold - Hidden Valley Lake, CA, USA  GPS: 38.8,-122.5

Posted by SJC on August 20, 2006, 7:59 pm
 The question of solar pool pumps comes up on here now and then,
Here is one of the links that one of the readers provided.

Posted by doug on August 21, 2006, 2:23 pm

Thanks for your coments.

I thought the pool pump might make sense because it fits with the
calendar.  The pool pump needs to run lots more hours a day in the
summer than in the winter, because there's a lot less potential for
algae growth in the winter.

Posted by dold on August 21, 2006, 8:41 pm
 Clarence Dold said:

My thought for a solar pool heater... the pump would run when the sun was
shining, when the heater could supply heat.  But the pumps require too much
power.  A site that I found that sells complete soalr pool pump kits was
kind of high priced, I think around $-6000.  At that rate, you might as
well spend $0,000, and get the local rebates that apply if you hook a
solar system to the grid, in many places.

Clarence A Dold - Hidden Valley Lake, CA, USA  GPS: 38.8,-122.5

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