Build Your Own Solar Powered Heater by Recycling Plastic Bottles 2026

Build your Own Solar Energy Heater by Recycling Plastic Bottles. Do you want to have a low-cost solar heater using nothing more and nothing less than plastic bottles? A report from the Tucumán Provincial Engineering Council detailed ways to create these wonders cheaply and simply, especially for those who need to save money on gas from bottles or who use firewood to heat water.

This new implementation of alternative energy sources tries to take advantage of free solar energy and use plastic bottles that are thrown into the trash. The idea, in simple terms, is to create a small greenhouse in each bottle and pass a watering hose (polyethylene) through it.

In this way, the heat that is trapped in the bottle and is then absorbed by the hose (which is black) is transferred to the water and thus can be heated and save fuel such as gas, electricity or firewood.

Operating Instructions:

Step 1

Collect at least 30 one and a half liter disposable soda bottles, all the same (important) and remove the label.

Step 2

Buy at a hardware store or business in the industry, 12 meters of black irrigation hose (it is important that it is that color) and ¾ inch in diameter, 8 “T” unions and two elbows, a roll of Teflon and two ¾ inch ball wrenches.

Step 3

Have an electric drill and a ¾-inch cup drill bit. If you do not have that tool, you can, with patience, use a small kitchen saw-type knife to make holes in the bottles.

Step 4

A hole is made at the base of each bottle, equal to the diameter of the hole that the bottle has in the sector where the lid goes. Once the holes have been made in the 30 bottles, five lengths of two meters each must be cut from black polyethylene hose.

Next, the bottle is joined to the other, inserting the neck of one into the hole drilled in the base of the other, to form a column of six bottles, and then a 2-meter piece of hose is inserted into it. By repeating this step five times, all 30 bottles have been used and a “grill” is available, which is completed by putting elbows at the ends and “T” joints in the middle. The heater collector is thus assembled as indicated in the figure.

Step 5

This grill is placed in the sun, on a tin roof and preferably facing North, then water is introduced through the bottom. After 15 minutes of exposure to the sun's rays, water at about 45 or 50 degrees comes out of the top, ready to use. This happens due to a physical principle called “thermosyphon”.

Step 6

An insulated container can be added to store hot water, for which recycled 200 liter containers are used, which have not been used to transport dangerous chemicals.

The type used for the wholesale marketing of olives is ideal, with which you can build a homemade thermo-tank, so that the water heated by the sun, during the day, can also be used at night.

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