The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘UPS’ Category

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GitHub – networkupstools/nut: The Network UPS Tools repository. UPS management protocol Informational RFC 9271 published by IETF at https://www.rfc-editor.org/info/rfc9271 Please star NUT on GitHub, this helps with sponsorships!

Posted by jpluimers on 2025/10/27

After having moved, I finally need to take a loog at [Wayback/Archive] GitHub – networkupstools/nut: The Network UPS Tools repository. UPS management protocol Informational RFC 9271 published by IETF at https://www.rfc-editor.org/info/rfc9271 Please star NUT on GitHub, this helps with sponsorships!

It supports a whole range of other UPS vendors, and we have a mix of vendors at home: APC, Cyberpower and Victron.

Documentation: [Wayback/Archive] Network UPS Tools – Welcome

To be continued….

Via [Wayback/Archive] Power Outage – YouTube (Level 2 Jeff).

Past blog posts mentioning Network UPS Tools:

  1. Some notes on apcupsd, a SUA3000XLI and a SUA48XLBP battery pack
  2. CP1500EPFCLCD – Backup UPS Systems | CyberPower

--jeroen

Posted in APC Smart-UPS, apcupsd, CyberPower, Hardware, Power User, UPS | Leave a Comment »

Power goes nuts – Network UPS Tools on a Raspberry Pi! – Jeff Geerlings -YouTube

Posted by jpluimers on 2025/07/17

Interesting NUT explanation: [Wayback/Archive] Save your servers! NUT on a Raspberry Pi! – YouTube.

Wonder how well it does with a combo of APC and Victron UPS systems.

Related:

--jeroen

Posted in apcupsd, Development, Hardware Development, Hardware Interfacing, Power User, Raspberry Pi, UPS | Leave a Comment »

Teardown of an APC Switched Rack PDU – AP7921 – YouTube

Posted by jpluimers on 2025/05/15

Cool to see how the innards exposed of a PDU model I have: [Wayback/Archive] Teardown of an APC Switched Rack PDU – AP7921 – YouTube

Related blog posts showing containing the AP7920 and AP7921 I have:

Product links with one level down the current models: Read the rest of this entry »

Posted in Hardware, Power User, UPS | Leave a Comment »

Some links on 12V ~18Ah UPS replacement batteries

Posted by jpluimers on 2024/11/27

The cells for the APC RBC7 and RBC55 UPS battery packs are all the same: 12V varying from 17Ah to 22Ah, has M5 leads for mounting the cables, and dimensions of ~76.5 * 181.5 * 167.5 mm

These cells are collectively named UB12180 but searching that term will get you prices that are not far from the APC ones, and APC wants to charge you an arm and a leg for them (around EUR 75 per cell).

Searching for the individual cell capacity will get you better offers.

Related blog posts:

Some links for finding them; maybe around Black Friday (it’s in a few days: 2024-11-29) I can really good deals:

Read the rest of this entry »

Posted in APC Smart-UPS, Development, Hardware Development, UPS | Tagged: | Leave a Comment »

Comparison of UPS Topologies: Line-interactive vs Online vs Offline | FS Community

Posted by jpluimers on 2024/05/31

For my link archive: [Wayback/Archive] Comparison of UPS Topologies: Line-interactive vs Online vs Offline | FS Community

The most important bits:

Read the rest of this entry »

Posted in Hardware, Power User, UPS | Leave a Comment »

APC SmartUPS Battery Float Voltage Calibration

Posted by jpluimers on 2023/07/19

For my link archive: [Wayback/Archive] APC SmartUPS Battery Float Voltage Calibration

It is my understanding that older BackUPS units could be adjusted with a potentiometer on the board. Calibration of newer models, and the SmartUPS line is factory set in the unit’s micro-controller. APC is of no assistance with units that are out of warranty. I’ve recently found information of how to recalibrate the battery float voltage through reprogramming the battery gain, and some information about modifying the UPS hardware, described below. I can’t take credit for discovering methods demonstrated, but hope it will be useful to another to have a coherent description.

Via:

Read the rest of this entry »

Posted in APC Smart-UPS, Development, Hardware Development, Power User, UPS | Leave a Comment »

Automatically shutting down an ESXi 6.7+ server from a CyberPower UPS using the PowerPanel Business Edition 4.x

Posted by jpluimers on 2021/07/09

Unlike the name PowerPanel Business Edition, this is a free tool. It allows you to manage your CyberPower UPS and to shutdown various systems, including an ESXi host.

It took CyberPower from version 3.3 to version 4.0 of the PowerPanel software to support ESXi 6.7. Reason was that VMware ESXi 6.5 was the latest version supporting vMA:

Below the steps to get PowerPanel 4.x up and running on ESXi 6.7+.

First of all, you have to ensure your CyberPower is connected to ESXi via USB.

Then you need to download and install the CyberPower virtual appliance “PowerPanel Business”

When the appliance runs, you have to virtually plugin the USB.

Finally configure the virtual appliance.

Read the rest of this entry »

Posted in CP1500EPFCLCD, CyberPower, ESXi6.5, ESXi6.7, Power User, UPS, Virtualization, VMware, VMware ESXi | Leave a Comment »

CP1500EPFCLCD – Backup UPS Systems | CyberPower

Posted by jpluimers on 2021/04/05

Reminder to self to write a bit more on the usage of a UPS my brother has got for a while now: CyberPower CP1500EPFCLCD which is Line-Interactive with Pure Sine Wave output.

Before buying the ESXi support seemed incredible.

Some links to start with:

 

Read the rest of this entry »

Posted in CP1500EPFCLCD, CyberPower, Hardware, Power User, UPS | 2 Comments »

APC UPS battery replacement for Smart-UPS 1500 (SUA1500) and XL 3000 (SUA3000XLT): batteries RBC7 and RBC55

Posted by jpluimers on 2016/11/28

The details of one of my UPS-es. Jeroen Wiert Pluimers - Google+

The details of one of my UPS-es. Jeroen Wiert Pluimers – Google+

On the right and bottom how the APC SmartUPS 1500 looked before cleaning. Despite APC claims of being non-spillable, lead acid batteries do eventually leak. APC just doesn’t tell you when (they say there is some fine print about replacing them, but hey – if the UPS doesn’t complain about capacity loss…).

Like I mentioned in my first post about the leaking, I cleaned the inside with sodium bicarbonate (easily to get – even in The Netherlands – as “baking soda” or “zuiveringszout” in most grocery shops. “zuiveringszout” is the same but much cheaper).

So after cleaning, you need to assemble a new battery pack and reinstall it. The RBC7 stock battery packs from APC are very expensive and since warranty expired on the UPS and APC batteries leaks anyway, it is much cheaper to re-assemble your own battery pack from a pair of UB12180 batteries. The same holds for the RBC55 (which are just basically two pairs of assembled UB12180 batteries). The decoding of these battery numbers are fairly easy: 12V holding 18.0 Ah of charge. Different battery manufacturers use different battery size nomenclature usually with a similar structure.

Disassembling and re-assembling the packs is fairly easy. Be sure to do this carefully: replacement sets of the APC battery connector wiring harness and fuse will set you back another USD/EUR 15-20 excluding shipping.

The below youtube videos are much clearer on this than any picture series I could have made, plus a series of Tweets figuring out the correct fuses to use.

Read the rest of this entry »

Posted in APC Smart-UPS, LifeHacker, Power User, UPS | Leave a Comment »

APC: getting ftp://ftp.apc.com/apc/public/software/pnetmib/mib/417/powernet417.mib turned out to be tricky

Posted by jpluimers on 2016/08/24

I tried updating my downloads for my APC7920 and APC7921 PDUs.

I knew the APC download site http://www.apc.com/nl/en/tools/download/index.cfm was slow and navigation unfriendly (lots of ERR_CACHE_MISS as you cannot ctrl-click on downloads), but it’s also buggy: Some of the ftp download URLs do not contain the authentication and one file would not download at all.

The solution for that is to prepend the credentials as username:password@ like these URLs where each first one is generated by the download site and each second one works:

  • ftp://ftp.apcc.com/restricted/hardware/nmcard/firmware/devipcfg_wiz/502/Device%20IP%20Configuration%20Wizard.exe
  • ftp://restrict:Kop$74!@ftp.apcc.com/restricted/hardware/nmcard/firmware/devipcfg_wiz/502/Device%20IP%20Configuration%20Wizard.exe
  • ftp://ftp.apc.com/restricted/hardware/nmcard/firmware/sec_wiz/104/SecWiz%201.04%20Install.exe
  • ftp://restrict:Kop$74!@ftp.apc.com/restricted/hardware/nmcard/firmware/sec_wiz/104/SecWiz%201.04%20Install.exe

The username is restrict and the password Kop$74! which requires single quotes on the command-line to prevent parameter and event expansion.

Otherwise you will get bash errors like these: event not found for the part starting with an exclamation mark and Login incorrect. for the parts having a dollar.

One file would not download at all: ftp://ftp.apc.com/apc/public/software/pnetmib/mib/417/powernet417 as all download attempts would time out:

  • Chrome with and without username:password@ (you will get a ERR_FTP_FAILED)
  • wget with and without username:password@ (it will result in a )
  • plain curl with and without username:password@ (it will result in a curl: (28) Timeout was reached)

The only command that would work was this:

curl -G ftp://ftp.apc.com/apc/public/software/pnetmib/mib/417/powernet417.mib > powernet417.mib

via: SimplicityGuy/pynoc – Travis CI

The trick is to:

  1. leave username and password away
  2. specify the -G (or –get) parameter forcing GET behaviour (which should be the default).

I’m not sure why it works, but it does.

–jeroen

Posted in *nix, APC Smart-UPS, cURL, Power User, UPS | Leave a Comment »

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