[Nut-upsuser] Eaton 5PX 3rd party batteries

[Dan Langille]

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On Sat, Nov 30, 2024, at 8:16 PM, Simon Wilson wrote:
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> On Sunday, December 01, 2024 05:58 AEST, Dan Langille via Nut-upsuser <nut-upsuser at alioth-lists.debian.net> wrote:
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>> On Fri, Nov 29, 2024, at 3:35 PM, Dan Langille via Nut-upsuser wrote:
>> > On Wed, Nov 27, 2024, at 10:56 AM, Greg Troxel via Nut-upsuser wrote:
>> >> Dan Langille via Nut-upsuser <nut-upsuser at alioth-lists.debian.net>
>> >> writes:
>> >>
>> >>>> On the website, they say 5.73 pounds (5 lbs 11.6 oz).
>> >>>>
>> >>>> Two of the batteries were 5 lbs 11 oz. The rest were all 10, 9, or 8 oz.
>> >>>>
>> >>>> See my bar chart at https://bsd.network/web/@dvl/113555334752647203
>> >>>
>> >>> The batteries are all within 3% of the expected weight. Seems good enough for me.
>> >>>
>> >>> I gave some thought as to how to distribute those 16x batteries within the UPS (4x) and the external battery unit (12x).
>> >>>
>> >>> In the following, I'm omitting the 5lb part of the weight and mention only the ounces.
>> >>>
>> >>> Not that I think it will make much difference, but I'll put all the four equal batteries into the UPS (4x 10oz batteries).
>> >>>
>> >>> That will leave the following for the external pack:
>> >>> '
>> >>> * 2 x 11
>> >>> * 1 x 10
>> >>> * 7 x 9 
>> >>> * 2 x 8
>> >>>
>> >>> The other choice I'd make: put 2 x 11 and 2 x 10 in the UPS, leaving the external battery
>> >>> unit with:
>> >>>
>> >>> * 3 x 10
>> >>> * 7 x 9 
>> >>> * 2 x 8
>> >>>
>> >>> I don't know enough to know if this matters and I expect I'm merely overthinking this.
>> >>
>> >> You are definitely overthinking it :-) Perhaps you've previously been
>> >> diagnosed as a nerd!
>> >
>> > Possibly. I also have a rain-barrel project underway, and I know I'm 
>> > overthinking that one too.
>> >
>> >> But, I would either put the 4 strongest in the UPS, or the 4 weakest,
>> >> making the external pack better, since it is more important.
>> >>
>> >> I would suggest that you get a West Mountain CBA, if you want to
>> >> continue to overthink this. We are assuming that more lead is more
>> >> capacity, but there are also weak cells, not clearly related to missing
>> >> lead. What really matters, IMHO, is how many Ah one can pull out of
>> >> the battery, and measuring that directly seems more direct.
>> >
>> > I understand, and no, I'm done with this stage of the process. I don't want
>> > to geek out any further.
>> >
>> > So far, every battery has been charged. Each took about 30 minutes. When charged
>> > they measured about 13.3-13.5V. The first batteries I charged are now at about
>> > 12.9-13.1V - one was 12.8V
>> >
>> > They're sitting in a room that is about 63F.
>> >
>> > My next step is to pull the main battery from the 5PX and replace those 
>> > units. However,
>> > it's 3:30 PM and I'd rather start such a project earlier in the day 
>> > should
>> > thing take longer than expected. 
>> >
>> > One server has a drive ready to be replaced and two drives are to be
>> > relocated from the drive bays at the front to PCI slots in the rear of 
>> > the server.
>> > That process is waiting on parts. I was going to wait for those parts 
>> > and do the drives
>> > and batteries at the same time. I changed my mind; I'm not going to 
>> > wait. Plus,
>> > the batteries may be a big enough job by themselves. I am sure the 
>> > Eaton 5PX legacy
>> > is not a hot-swappable unit. I'll power everything down.
>> >
>> >> Thanks for posting about your journey; it has been illuminating to me.
>> >
>> > I'm glad it helps. I write mostly for selfish reasons and encourage 
>> > others to do so
>> > too. It helps to know what you did should something go wrong and/or you 
>> > want
>> > to repeat the procedure later. If you make your writing public it will 
>> > also
>> > help others and I'm thankful of that.
>> 
>> The batteries were replace earlier today. Details with photos in the this blog post:
>> 
>> https://dan.langille.org/2024/11/30/replacing-batteries-eaton-5px-5px2200rt-5pxebm48rt/
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>> Some tricky bits, especially a metal nut very close to the fuses... A slice of cardboard
>> helped me through that part.
>> 
>> BONUS: I ordered four more batteries than I needed (12). This means the UPS in the office,
>> which I'm sure will start screaming for new batteries soon, has a supply already on hand.
> None of the images load for me on that blog - maybe double check that?
> 

Oh I see. It's working fine in Safari.  I uploaded .heic images, not the .png I exported. I won't be able to fix that until tomorrow. Thanks for letting me know.

--
  Dan Langille
  dan at langille.org

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