Using condensed water of Air Conditioner to top up a battery

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SUMMARY

Using condensed water from air conditioners as a top-up for flooded lead-acid batteries is a debated topic. While some users report successful long-term use of dehumidifier water, concerns about contaminants such as dust and algae from the air conditioning process are prevalent. The consensus leans towards using distilled water for battery maintenance to avoid potential degradation. Ultimately, while condensed water may be acceptable in certain conditions, distilled water remains the recommended choice for optimal battery health.

PREREQUISITES
  • Understanding of flooded lead-acid battery maintenance
  • Knowledge of water quality standards for battery top-up
  • Familiarity with air conditioning systems and their condensation processes
  • Basic principles of water filtration techniques
NEXT STEPS
  • Research the effects of contaminants in battery water on performance
  • Learn about proper filtration methods for water used in batteries
  • Investigate the impact of algae on battery life and performance
  • Explore best practices for maintaining flooded lead-acid batteries
USEFUL FOR

Battery maintenance professionals, automotive technicians, and anyone involved in the upkeep of flooded lead-acid batteries will benefit from this discussion.

signode
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Hi;

As we know that flooded lead acid battery needs to be top-up (watering) after passage of some time and it is recommended to use distilled water.
Many people say that water condensed by Air Conditioner is also very good to top-up the battery. Is it true?
 
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Rain water.
 
I have used water from a dehumidifier for many years.
 
It would make me nervous because fan+coil=dust collector.
 
russ_watters said:
It would make me nervous because fan+coil=dust collector.

There can be things that collect like you say. Usually they settle to the bottom of the bucket and are thrown out with the tail end of the water.
 
Does proper distilled water coat that much that you want to degrade your battery? All of these suggestions will have contaminants.
 
Windadct said:
Does proper distilled water coat that much that you want to degrade your battery? All of these suggestions will have contaminants.

You have no idea how many batteries I have to maintain. I have used this method successfully for years.
 
signode said:
Many people say that water condensed by Air Conditioner is also very good to top-up the battery. Is it true?
It may be true, in some cases. But in some climates I'd expect to find algae, the dripping pipes can be green with algae. Filtering would at least remove the bigger clumps.

Still, I think your boss would probably prefer that you used distilled water in his expensive batteries. :wink:
 

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