Watermaker water for Wet Cell Batteries? - SailNet Community
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post #1 of 13 Old 4 Weeks Ago Thread Starter
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Watermaker water for Wet Cell Batteries?

Hi,
We are currently anchored in Barra de Navidad, Mexico and just replaced our (AGM) house batteries with four wet cell golf cart batteries. Being new to wet cells I have a water question:
Can we use water from our Spectra watermaker to fill these 4 batteries when they need water, without doing any damage? Or is commercial distilled water the only way to go?
Thnks,
Chip
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Re: Watermaker water for Wet Cell Batteries?

No

You need distilled or DI water. You can made DI water by getting a DI filter. I have one i got off amazon for like $20

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Re: Watermaker water for Wet Cell Batteries?

I also wondered that some years back when my watermaker was turning out 20ppm water. I got an emphatic no!
I've no idea what a DI filter is, but I'd not risk my batteries on a $20.00 filter. Distilled water is cheap and you shouldn't be using much at all. If you are, then you have a serious problem which I would suggest you address ASAP!

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Re: Watermaker water for Wet Cell Batteries?

A DI filter is a filter with ion exchange resin in it that exchangers dissolved chemicals in water for H+ and OH- ions, which combine to make H2O. Places that need real pure water run their distilled or RO water through them. When i was a field chemist i carrier a squeeze bottle with a screen filter and DI resin in it to make pure water for doing chemical testing because i couldnt carry around jugs of water.

So that $20 filter makes very pure water!

Now you know that which could have been looked up very easy. Next time you go to water your batteries and run out of distilled store brought water and cant find some in easy walking distance, ......... it will be too later to have gotten that $20 filter.

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Re: Watermaker water for Wet Cell Batteries?

Hi Chip,

Trojan [the battery manufacturer] indicates we can use watermaker water in our T105 FLA batteries if the TDS is <100ppm.

Even our dehumidifier water averages 25ppm... We use both after testing the product is within spec.

Here is Trojan's whitepaper discussing this.

Of course, if distilled water is readily available... why not?

Cheers! Bill


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Re: Watermaker water for Wet Cell Batteries?

Not so fast. Trogen's chloride spec is 5 ppm. I doubt any desal unit is that low. The German standard is 0.5 ppm chloride.

It isn't just TDS.

(I was on an ASTM subcommittee that worked on this)

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Re: Watermaker water for Wet Cell Batteries?

Don's correct. Deionization (DI) filters were everywhere in our chemical labs because we needed ultra pure water.

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Re: Watermaker water for Wet Cell Batteries?

A jug is what..a buck?
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Re: Watermaker water for Wet Cell Batteries?

Quote:
Originally Posted by RegisteredUser View Post
A jug is what..a buck?
In some places. In others, it is almost impossible to find distilled or deionized water. Most of South and Central America only sell pint or quart bottles of "battery water" (distilled water colored yellow) for something like $5. When we did occasionally find gallons distilled water for sale, we hoarded it.

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Re: Watermaker water for Wet Cell Batteries?

For real distilled water, try the pharmacies. Or ask any medical lab where they get it. Distilled water is used for lots more things than batteries.
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