How to make distilled water for inverter battery?

By Matthew Joseph Nandirio •  Updated: 09/23/21 •  6 min read

There is no better choice than distilled water for better self-life for inverter batteries. Hence, no matter where you are, always use distilled water. Once you have invested a lump sum amount on battery, you better make the best of the investment.

However, we all might not have easy availability of distilled water. I know people nowadays prefer to use RO purifiers and advanced aqua guards for drinking water. So, it is quite difficult to obtain distilled water every time. You can check out simple videos to make your DIY distilled water for batteries.

Solar Inverter
Solar Inverter

Before getting into the details, let us first understand two important factors.

What is distilled water? Why is it ideal for inverter batteries?

Distilled water is a type of purified water. To be more precise, distillation is a process of filtration. In contrast to other modes of purification, distillation can be done easily. Significantly, battery manufacturers always recommend using distilled water to complement power generation.

Moreover, distilled water can improve the self-life of the battery. It meets the exact requirement of TDS and PH level necessary for inverter battery. Excess impurities present in tap water can block the layers of the inverter battery. Eventually, it restricts the performance of power generation.  

Therefore, it is ideal to use distilled water for inverter batteries. So, how to make distilled water for inverter batteries?

Fuel Distillation

Here, I have listed some tricks you can use to make distilled water at home. I am sure you have two pots and a stove nearby! Now, pour some water into the pots. Oh yes! You need some ice cubes too! That’s all you need for making distilled water.

#Step One

Place a large pot on the burner and add as much water as you need. First, place the small pot inside the large one. The small pot should float by the water in the large pot. The drill is to circulate the water vapor. Make sure there is plenty of airflow between the two pots.

#Step Two

In the second stage, of course, you need to turn the burner on! Try to keep it between medium to medium-high flame. Alternatively, you can turn on a steady simmer between 180 to 200 degrees F. the trick is to maintain the range perfect.

#Step Three

Furthermore, after a few minutes, place the lid upside down. This will help to accumulate the condensed water easily. Once you are done with the process, take out some ice cubes. After that, you need to fill the inverted lids with plenty of ice cubes. This will trigger the condensation process.

#Step Four

Sit back and relax till the first batch of ice cubes melts down. Then, you need to keep supplying the ice cubes twice an hour. You can repeat the supply 4 to 5 times. At this point, be careful when dumping the melted ice outside.

#Step Five

After two to three hours of process, you will notice the dripped-down water in the small pot. Finally, you can collect the water and use it. Again, from 8 to 9 cups of regular water, you can produce only one cup of distilled water.

Interestingly, making distilled water is the ultimate fun. Once you are successful in the process, you can try out making a larger amount next time. However, you might be wondering how much time you need to invest in the process!

If you have two to three hours in hand, you can easily produce a large amount within the same time. So, is it the only way to make distilled water for the inverter battery? No. Today, I will introduce another method to make distilled water for inverter batteries.

Solar Distillation process

Interestingly, the equipment is almost the same for both the process. However, you can use a large diameter pot with a glass cover. Even the process is also scientifically the same. The only difference is, in place of the burner, you will use solar heat.

Therefore we can say, this process is sustainable and environment-friendly. On the other hand, you might not need to participate in the process actively. Let me just give a quick snap of the process.

If you already read the first part, you know the equipment. Just like the first process, you will place a small pot on a larger pot. Make sure the pots are made of steel or glass. It will help to absorb the heat from the sun.


Checklists for the solar distillation process

  • Moreover, when the process is all about condensation, the hotter the climate, the faster the result.
  • Hence, always make sure to place the pots on a hot sunny day. It is better to try out the process between 12 to 4 P.M.
  • If you see the fig., you will find the large pot is quite stretched. It will help to enhance hot air circulation.
  • In addition, if you can use a glass lid, you will easily monitor the result from the top.
  • If you don’t have a glass lid, you can make a simple solar cover. However, the lid of the jar should be slightly insulated.
  • You can also use a glass jar and put some water in a container instead. The condensed water would be accumulated in the jar. In that case, you can place the jar on a solar reflector to increase the heat level.
  • You should fill the water when the remnant water gets evaporated.

Competitive analysis between the two processes of distillation

Now, let us compare the two methods and find out with process is easier:

Parameters of ComparisonFuel distillationSolar distillation
TimeTwo to three hoursFive to six hours (depends on the climate)
LocationAnywhereHot and humid region is more suitable
EquipmentTwo pots(large and small), ice cubes, burner, glass lid.Two pots or jars, glass lid, cold water.
AccessibilityEasily accessibleRequire proper climatic set-up
AffordabilityConsumption of fuel might cost a few amountsRelatively cheap

Now, it’s your take to choose what is convenient for you. While solar distillation is a restricted process, fuel distillation can be done anywhere. Hence, based on the availability of the resources, you can try out one of these two methods.

I hope this blog has helped you to learn the two processes. So, if you want to know more important facts to improve the performance of your inverter battery, please continue reading.

People also asked:

Which water is used for the inverter battery?

In ideal conditions, distilled water is the best choice for an inverter battery. The balance of PH and TDS level help to boost the performance and enhance self-life.

Is boiled water the same as distilled water?

Of course not! If you read the process of distillation, you will understand the huge difference between the two. DISTILLED WATER CAN ELIMINATE ALL THE IMPURITIES AND MICROORGANISMS.  

 What is better for battery, distilled or purified water?

Most of the purified water contains essential minerals. On the other hand, distilled water removes the minerals, too, which is ideal for an inverter battery. If distilled water is not available a couple of times, you can use purified water. However, for regular usage, the former is ideal.

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Matthew Joseph Nandirio

Matthew Joseph Nandirio is the Founder of walkingsolar. After graduating from the University of Houston in 2002, matt started working as an electrical and electronic engineer for several multi-national solar energy companies. He has a wide range of experiences including solar system requirement analysis, planning, maintaining, debugging and even solar device development through research. He now shares his 20 years of expertise through his articles on the walkingsolar website. Further, he is also the author of two books on Solar Technology, “Solar Power for Villages” and “DIY Solar System for Dummies”.