Introduction: Easy and Inexpensive Solar Hot Water

This instructable will show you how to utilize the summer's sun to keep your water tank full of hot water for no expense. Watch the video above for the complete tour.

Step 1: Needs

1. 300 ft. of 3/4" black Polyethylene pipe. (Footage depends on size of roof)
2. 15 watt solar panel running a circulator pump directly.

3. Enough hoses, pipes, and aqueduct to get the water to your old water tank.

Step 2: Roof

Picture of Roof

- You will lay out the black pipes on your roof to soak up the sun's hot rays.

- A 15 watt solar panel will power the circulator pump indoors.

Step 3: The Circulator Pump

Picture of The Circulator Pump

- Place a nominal 12v circulator pump inside to keep water flowing from the roof, to the tank, and back out again.

* Make sue that you label the directions of all pipes, so you don't mix the hot and cold!

Step 4: Install a Valve on Outside Pipes

Picture of Install a Valve on Outside Pipes

- A valve is needed at the point where the outside line connects to the inside. This is to drain the system before winter cold freezes them.

Step 5: Install a Bypass

Picture of Install a Bypass

- On the inside, where the outside pipes come in, you need a bypass valve so that in winter your system still works.


Minyah (author)2017-05-14

Like it a lot... basically what I want to do with my off-grid cabin. Can you send me more info please

Regards Chris

fahking (author)2016-08-11

what temperature is the water come out at?

In the summer it will keep the tank around 120-130 deg F. In the spring and fall it is still a very helpful preheat and much of the time is warm enough for a shower.

DIY Hacks and How Tos (author)2016-07-12

Great renewable energy project. You've got my vote.

Thanks for your support. Now we've just got to get more people to the polling place.

About This Instructable




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