Homemade solar water heater with soda bottles


Calentador solar de agua casero con botellas de gaseosa


This graphic manual shared on the internet comes to our hands to make our own homemade solar water heater, in a few simple steps.


Instructions are given through descriptive bullets.






The first thing you will have to do is collect enough PET bottles to carry out this project. Everything will depend on the capacity you want for your heater. The more capacity, the more bottles you will have to use.


I recommend you start with a small project, where you will learn enough technique to undertake larger projects.


calentador solar 1


Preparing plastic bottles.


You must clean the bottles, remove the caps and labels. Leave them clean, as you work with them you will appreciate it 😉


calentador solar 2


We prepare the bottles.


You must make a hole in the base of each bottle that you are going to use, of a size enough to pass the polystyrene pipe that we are going to install between them. It should not be larger than the mouth of the bottle, since the spout must pass through it so as not to complicate the installation further.


calentador solar 3



Threading the polystyrene spout through the bottle.


calentador solar 4


Here you have an outline of how the set should look once you complete it.


calentador solar 5


If you have doubts or not exactly what you were looking for, here are more proposals to make your own homemade solar heater .


How it works.


Its general operation can be seen in the following bullet point. But in a simple way we can say that a solar heater works like a heat trap, where solar radiation is trapped by the greenhouse effect inside the heater. These heaters do not need external power to operate. They use the principle of convection to move the water.


calentador solar 6
General scheme:
calentador solar 7
calentador solar 8
calentador solar 9
calentador solar 10


If you liked the idea but it doesn’t suit your needs, you can try this other heater .


 calentador solar con botellas de gaseosas






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