DIY Solar Water Heater! – Solar Thermal COPPER COIL Water Heater! – Easy DIY (Full instr.) 170F

DIY Solar Water Heater. A Homemade “flat panel” COPPER COIL Solar Water Heater. Easy DIY. Full Instructions. super hot temps (sustained at 165F+). fast hot water. no electricity needed. easily hooks up to standard water tap/garden hose. reaches temps well over 150F (water pasteurization temp) so it works to clear/kill any pathogens (if a non-municipal source is used). it’s super portable so it’s good for camping/off-grid/emergency as well as everyday use. couple of notes: water flow rate verified with a measuring cup and a stopwatch. (roughly 1 oz. of hot water every 1 to 1.5 seconds and scaled up – one gallon every 2-3 minutes or 20-30 gallons per hour). about the copper tubing: a 50 foot roll of tubing is much cheaper than smaller rolls connected. *only $24.95 for 50 ft (but $17 for a 20 ft roll and $10 for a 10 ft roll). the glass is just standard window glass and the paint is flat black. it’s thin flat design allows it to be easily stored in a closet, under the bed etc… *”seal it” according to your climate conditions and whether you plan to leave it outside.


Mohammed Ali says:

nice video

MrMusic1950 says:

I used black PTFE pipe woven back and forth across the south end of my house. a copper heat transfer inside my water tank + a small central heating pump, header tank and antifreeze. works ok in winter too. enough heat for a bath, add electric heater for ten minutes & your heading for steamy bath.

Steven Bibeau says:

Nice job, Really simple Really reliable Would be great for a campsite.

Blair Balcaen says:

In Manitoba Canada we use black aqua line ABS tubing any ware in dia. from 3/4 inch to 1 1/4 inch with a small circ pump. i have generally put the coil on the house or garage roof or build a trellis type fence southern exposure is best. no need to enclose the ABS tubing. 65 to 70F water inlet temp produces hot water any ware from 105 to 125F. Below freezing temps system is drained and shut down

Mike Mccrary says:

if anyone has been in So. Fl. you will see on roofs a tall box going through roof this is a 100 gal storage tank. the tray’s on roof are 5’×3′ 2 trays 3/4 pipe going from tank (cold) to bottom of trays 3/4″ out of top end of tray to side of tank. then from top of tand to house hot plumbing. I am a plumber. in Miami, as said earlier a T&P valve must be used. cold water to trays city water supply temp.. hot out of tray about 170° look up copper solar and storage tank. this very old system requires no circulating pump.

Nam Le H. says:

What’s your inlet temp?

Eric Hawkins says:

I built such a SWH device like this in 1991, but used a Pex Pipe in Black from Isral with 100 meter x 16mm in a M2 box sealed with K glass, worked fantastic when i tested it while in Cyprus from 1994 to 1998

Josh Maxwell says:

What a fun project this was! I paid a little extra to have the wood pre-cut & assembled, and saved a lot of time as well.

john bosinger says:

Are these systems considered cross connections if tied into a potable water system, ex. household hot water heater?

Dan Hart says:

nice build as always and once again

Myles Nicholas says:

Too silly, black polyethylene pipe is so cheap to buy and retains the heat so easily.
Polycarbonate Sheets cut to size is my choice.
For plumbing use PEX pipe.

Frank Salman says:

Why did you paint it; Does the black direct more heat or was it just for looks and not necessary?

Chercogaming says:

Where did you bought that copper tubing?

Harshad Mistry says:

Fantastics ideas. Mindly wonderful created. I thanks lots off

Sergio Galaviz says:

what temperature need to be water solar heater outside for heat the hater like hot

Connie Cannon says:

I love this idea !!

Cylde Dellafish says:

Beautiful, thank you!

Przemysław Gruchała says:

desertsun02, can you build second solar heater, the same length and diameter of pipe, but with couple modifications.. ? Instead of painting wood to dark color, place there mirror, on the bottom and on sides of box. Glass is blocking infrared, so you’re wasting a lot of energy, you could search for plastic transparent for either IR and visible light.
You could try polarization filter (it’s passing light with right polarization and blocking and reflecting with the other one, randomly, so if you will join this with mirrors (perhaps on slightly curved backside of box), photons will be bouncing there and more will be absorbed).
You could also experiment with filling it by transparent oil. Or something with good heat capacity. Which will absorb photons and increase temperature to higher temperature than 100 C.
When you will have ready 2nd or even 3rd version, perform tests, but this time, measure mass/volume of water with g/mL precision, measure their temperature prior heating and after heating (+- 1 C precision electronic thermometer), measure time needed to heat certain mass/volume of water using stopwatch. Compare designs and release video with what you found, which design is the most efficient.

grandadan says:

Since i was i child i had already solar water heater right from a plastic pipe lol. Good idea but i need a km pipe one and the copper price is too high now LOL.

claud fenix says:

wouldn’t this attract lighting?

Игорь С says:

Зачем надо было использовать медь? Вполне достаточно ПВХ трубки

Readme .txt says:

Ideal for a night shower.

Tony Ochet says:

very awesome!

Graham Smith says:

I’m so glad you showed me how to make this, quite the work of art!

howtosavedishwasher says:

thank you for sharing this video, this DIY is awesomely easy to follow.. great job..

adel M.A.K says:


Jez Lucas says:

a mirror? are you sure that’s a benefit , reflection of heat and light ? would think it would have opposite effect

Dano Duncan says:

when I saw the thumbprint from the video, I was thinking you could probably increase that by painting it black… then I watched the video… 😉

iwantosavemoney says:

this is one way to go about it for sure I like the idea for sure. I think if I was going to build one I would build it in a metal box with insulation. to add to the durability and might make it a little more efficient. good job

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