6 Easy Ways To Make A Solar Water Heater [Step By Step]

Written By: | Last Updated On: August 6, 2022
how to make a solar water heater

If you are looking for an in-depth guide on how to make a solar water heater, then this article is exactly what you are looking for.

In this guide, we will walk you through how to make a DIY solar water heater in 6 easy ways, step by step.

So without further ado, let’s jump right into the first way.

1. How to make a solar heater with a hose

It’s a very easy way so let’s start with the tools required

  • Hose
  • Plywood
  • Tubing

How to make DIY solar water heater with a hose step by step:

  1. First, you need to paint the hose black if it is not black it will help absorb the sun better.
  2. then coil the tube and attach it to your plywood.
  3. half inch tubing every 50 feet is almost exactly one gallon so 100 feet is recommended to heat about two gallons.
  4. make sure that you are putting your hose in a sunny place, the water can heat up to 133 degrees Fahrenheit after 30 minutes of sun.

2. How to build a solar heater with a screen Absorber


  • Wood to build a collector box
  • Staples and staple gun
  • glue or Silicone caulk
  • black aluminum screen

DIY Solar Heater step by step

  1. Similar to building a solar cooker, the first thing you need to do is to build your frame, we will build a woody frame with a shape of rectangular.
  2. then we will cut our black aluminum screen into three pieces one of them will be attached to the frame, and the other two will be for the bottom and top layers.
  3. Install the inlet and outlet vents: 
  4. Cut holes in the back of the collector for the inlet and outlet vents
  5. Attach the absorber box to the frame and make sure that you sealed any openings.
  6. To disperse the air flowing in via the intake, use a baffle.

3. Solar heater with a barrel


  • glow plug
  • copper wires
  • barrel
  • faucet
  • glue
  • drill
  • marker
  • solar panel or a collecter

How to make a solar water heater at home with a barrel step by step

  1. The first step is to prepare the barrel, we are using a barrel to contain the water which will be heated, so how to prepare it?
  2. The first thing is to mark two spots with the same size of the glow plug, then use the drill to make two holes of the same size but be careful while doing this step because the hole might go too much wider.
  3. now it’s time to put the two glow plug you have into the two holes that you just made, then use glue to glue them into the drill, make sure that u glued them well because it’s very important because this step may cause a leak of water.
  4. then attach the two wires to the two glow plug and the two other sides to the collecter which you made or the solar panel.
  5. the final step is to fill the drill with water then leave it for about 30-45 minutes and you will get the water heated.

4. Flat panel solar heater


  • plywood
  • board
  • copper pipes
  • glass
  • pipes
  • zip ties

How to make a flat panel solar heater

  1. the first thing you want to do is to create your frame, use plywood to make it, it’s better to make a rectangular shape.
  2. circularly tie the copper wires and then put them on the board, after that you must drill holes all around the board and use zip ties to secure the cable.
  3. put the board inside the frame, and don’t forget to drill holes where the pipes will pass.
  4. then cover the frame with the glass, and for a clean finish, attach the pipe to garden hose adapters.
  5. the final step is to paint your collecter box black.

5. Thermosyphon water heater


  • A collector box
  • Copper grid
  • Collecter manifold
  • Aluminum roll
  • Insulation sheet 

How to build a thermosyphon water heater step by step

  1. The first step is to build your collecter box and connect it to the storage tank with an efficient slope, and then when the sun hits it the water in there heats up.
  2. The water rises to the storage bank and then the collector transports cool water from the storage tank to the panel.

Advantages of the thermosyphon water heater

When the temperature in the collector falls below that in the tank, the water flow stop.

Disadvantages of the thermosyphon water heater

It can only be used in non-freezing regions because It doesn’t have any anti-freeze features.

6. Water heater using old fridge


  • Old fridge parts
  • Glass
  • Aluminum foil
  • Hoses 
  • Tape
  • plywood

How to make a solar water heater using an old fridge

  1. Most of us don’t know that the back of a fridge absorbs the heat well because it’s black, so we can consider it as a perfect collecter but before we start with it you must cut the grill.
  2. the first step is to build our frame with plywood, and then put your collecter into this frame
  3. Cover your collecter with a glass, and don’t forget to seal any cracks with tape
  4. The final step is to connect the hose to the entry and exit ports

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