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Old 11-12-2013, 03:36 PM   #1
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Batteries providing 120V

I was just offered a stack of 12 v batteries that can provide 120v. They came out of a portable X Ray machine. Should I ? This should start some interesting conversation.
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Old 11-12-2013, 03:51 PM   #2
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Hmmm...are there 10 - 12V batteries wired in series or are they wired in parallel powering a inverter?

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Old 11-12-2013, 04:25 PM   #3
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Why would you need that much battery power?

Note that it's direct current, not the AC that you get off of a power grid. The only think you could do with them is to put them into a parallel configuration (giving you 12v) so that you could power an inverter, or any other 12v apparatus for a considerable length of time.

The down side is that then you have to charge them.
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Old 11-12-2013, 04:31 PM   #4
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Why would you need that much battery power?

Note that it's direct current, not the AC that you get off of a power grid. The only think you could do with them is to put them into a parallel configuration (giving you 12v) so that you could power an inverter, or any other 12v apparatus for a considerable length of time.

The down side is that then you have to charge them.
The biggest down side would be the weight, approx. 400+ lbs.
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Old 11-13-2013, 08:18 AM   #5
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I was just offered a stack of 12 v batteries that can provide 120v. They came out of a portable X Ray machine. Should I ? This should start some interesting conversation.
What is the AH rating and size of the batteries?

This may be "doable" for a home "off grid" installation, but most likely not practical for a mobile one even if they are small (like a motorcycle battery).
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Old 11-13-2013, 08:28 AM   #6
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I was just offered a stack of 12 v batteries that can provide 120v. They came out of a portable X Ray machine. Should I ? This should start some interesting conversation.
It sounds to me like someone is trying to get rid of some old used batteries to avoid paying a disposal fee. I'd pass.
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Old 11-13-2013, 08:52 AM   #7
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These may be considerably smaller than reg deep cycle batteries as they were basically backup power for radiology equip intended for short term use. But still, the space and weight and bother of trying to keep them charged. And are they so old they won't hold a charge? Need more info. If price was right, and quality was good, and a/h was right, it might be ok to do and only use 2 in parallel. ???
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Old 11-13-2013, 09:15 AM   #8
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It sounds to me like someone is trying to get rid of some old used batteries to avoid paying a disposal fee. I'd pass.
It does sound like maybe that is the case. However, he might be able to turn the table on them - the scrap value of lead has really gone up lately. I had to scrap a huge 36v forklift battery at work a few months ago and had people fighting over who could take it our hands...
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Old 11-13-2013, 10:36 AM   #9
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Good idea!
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Old 11-13-2013, 03:53 PM   #10
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There are 120vdc to 120vac inverters. So, if the batteries are in good shape, and of high enough capacity, you might be onto the start of an emergency power back up system. For your home of course. I suspect that the batteries would be too heavy for all but the biggest RVs. We use 150AHr-130VDC at work, and that 52 cell lead-acid battery set weighs a lot!
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Old 11-13-2013, 06:54 PM   #11
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I manage several X Ray departments in Hospitals and these things are always available to me at no costs because it just goes to scrap. I didn't take the batteries, I just thought it would be an interesting subject to discuss here. they are small size batteries and used to produce X-rays using 120 kv and about 10-12 ma. They can usually stay charged with about 20 of these exposures. They were replaced because they couldn't keep a charge.
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Old 11-13-2013, 07:19 PM   #12
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ok, small capacity and shot. too bad, that could be the start of a good project.....
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