Jump to content

Solar Panel Heat

Recommended Posts

I am wondering how much heat is generated from the bottom of solar panels? Is it enough to use as a solar water heater by stringing black pipe under the panels? A few years ago I made a solar heater for a friends pool that circulated 300 gallons of 140 degree water twice a day in his pool. If solar panel generate enough heat it would reduce propane use and add to boondocking time. Thanks, Kurt

Link to comment
Share on other sites

Solar panels are dark and don't "generate" heat as much as become hot from the sunlight. You would be counting on heat transfer between the bottom of a panel mounted on stand-offs and the solar heater.


I have two Unisolar 69-watt "peel-and-stick" panels and two solid 240-watt panels on my rooftop. When I point a Harbor Freight laser heat sensor at the inside of the roof I can tell where the glued-down panels are (hottest), where there are no panels (cooler), where the standoff-mounted solid panels are (coolest).


But I don't think you could put a "solar heater" under a solid panel and have it get as hot as it would get if it were in direct sunlight. After all, it's in the shade.



Link to comment
Share on other sites

You'd get some reasonably hot water, not as hot as directly using the sun for heat though. A side gain would be that your panels would be cooler and if you had an MPPT controller it would make a tiny bit more power.


Downside would be more thermal stress on your panels as your cold water hit the back of them unevenly.


I'd guess it would be a fun project but not really practical.

Link to comment
Share on other sites


This topic is now archived and is closed to further replies.

This topic is now closed to further replies.
RVers Online University


Our program provides accurate individual wheel weights for your RV, toad, and tow vehicle, and will help you trim the pounds if you need to.

Dish For My RV.

RV Cable Grip

RV Cable Grip

All the water you need...No matter where you go

Country Thunder Iowa

Nomad Internet

Rv Share

RV Air.

Find out more or sign up for Escapees RV'ers Bootcamp.

Advertise your product or service here.

The Rvers- Now Streaming

RVTravel.com Logo

  • Create New...