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

[Dan Langille]

On Sat, Nov 30, 2024, at 8:55 PM, Dan Langille via Nut-upsuser wrote:
> 
> On Sat, Nov 30, 2024, at 8:16 PM, Simon Wilson wrote:
>> 
>> 
>> 
>> 
>> 
>> 
>> On Sunday, December 01, 2024 05:58 AEST, Dan Langille via Nut-upsuser <nut-upsuser at alioth-lists.debian.net> wrote:
>> 
>>  
>> 
>> 
>>> 
>>> 
>>> 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/
>>> 
>>> 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.
> 

Fixed. Thank you for letting me now. I appreciate it.

--
  Dan Langille
  dan at langille.org

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