Smart-UPS X750 sudden battery power too low.

[jwood_ok]

Hey all, I have a Smart-UPS X750 that, while a little up there in age, doesn't look like it's due for a battery replacement for about a year.

A couple of days ago, it suddenly said that the battery power was too low to support the load.  The load should not have changed.  Here's what is showing: in the logs at about that time - any ideas?

03/22/2025	09:17:08	Device	UPS: The battery power is too low to support the load; if power fails, the UPS will be shut down immediately.
03/22/2025	09:17:05	Device	UPS: RFC1628 MIB UPS is no longer on battery.
03/22/2025	09:17:05	Device	UPS: No longer on battery power.
03/22/2025	09:16:44	Device	UPS: RFC1628 MIB UPS is on battery.
03/22/2025	09:16:44	Device	UPS: On battery power in response to distorted input.
03/20/2025	19:53:19	System	NTP update successful.
03/19/2025	01:46:23	Device	UPS: RFC1628 MIB UPS is no longer on battery.
03/19/2025	01:46:23	Device	UPS: No longer on battery power.

[Teken]

Remove AC Mains from the wall outlet. Time how long the system run for before shutting down and report the same here.

When you reply upload the event, data, ups logs along with a screen capture of the UPS NMC About Tab.

Questions Ask . . . 👍

[jwood_ok]

Hey @Teken Thank you for the information.  I'm not currently on site, so I can't do this at this time.  I was kind of hoping there may be information that could be gathered remotely.  We may have someone going to the site next week at some point.

[Teken]

All of the relevant validation tests requires a person to be onsite. More specifically completing a static & dynamic load tests.

Removing AC Mains with the loads attached is a dynamic tests. It will accurately reflect the current state of the system and battery cartridge.

The service life of the battery cartridge is rated for 2-5 years. Which is based on usage, temperature, and environmental conditions.

When someone gets on site document what the battery cartridge indicates as the production date vs what is displayed on the NMC. 

Afterwards the validation can commence and time the operational runtime and compare it to the APC Runtime Calculator.

If the chart indicates a load say 200 watts is equivalent to 30 minutes but you see 6 - Replace. Obviously if you see only 1-3 minutes - Replace.

If the runtime is 20-25 minutes it’s time to order a replacement in the near future. 

Questions Ask . . . 👍

[jwood_ok]

Thank you.  We'll see if we can get eyes on it next week.

[jwood_ok]

Unfortunately, I'm not sure all the instructions were done as to what you instructed me, but I do believe that the AC input was removed and this is the log from that (I cleaned up some SMTP error messages I was getting, but otherwise this is what was in there):

04/02/2025 08:54:35 Device UPS: RFC1628 MIB UPS is no longer on battery. 0x3602
04/02/2025 08:54:35 Device UPS: No longer on battery power. 0x010A
04/02/2025 08:54:33 Device UPS: RFC1628 MIB UPS is on battery. 0x3601
04/02/2025 08:54:33 Device UPS: On battery power in response to distorted input. 0x0109
04/02/2025 08:50:16 Device UPS: A discharged battery condition no longer exists. 0x0108
04/02/2025 08:35:17 Device UPS: A low battery condition no longer exists. 0x0110
04/02/2025 08:35:17 Device UPS: The battery power is too low to support the load; if power fails, the UPS will be shut down immediately. 0x0107
04/02/2025 08:35:16 Device UPS: RFC1628 MIB UPS is no longer on battery. 0x3602
04/02/2025 08:35:16 Device UPS: No longer on battery power. 0x010A
04/02/2025 08:31:20 Device UPS: A discharged battery condition no longer exists. 0x0108
04/02/2025 08:31:20 Device UPS: The battery power is too low to continue to support the load; the UPS will shut down if input power does not return to normal soon. 0x010F
04/02/2025 08:31:19 Device UPS: RFC1628 MIB UPS is on battery. 0x3601
04/02/2025 08:31:19 Device UPS: On battery power in response to none. 0x0109
04/02/2025 08:31:19 Device UPS: The power for switched outlet group 1, Outlet Group 1, is on. 0x0185
04/02/2025 08:31:19 Device UPS: The power for the main outlet group, Unswitched Group, is on. 0x0185
04/02/2025 08:31:19 Device UPS: The battery power is too low to support the load; if power fails, the UPS will be shut down immediately. 0x0107
04/02/2025 08:31:19 Device UPS: Restored the local network management interface-to-UPS communication. 0x0101
04/02/2025 08:30:59 System Network service started. IPv6 address FE80::2C0:B7FF:FEF4:36F1 assigned by link-local autoconfiguration. 0x0007
04/02/2025 08:30:57 System Network service started. System IP is 10.59.27.25 from manually configured settings. 0x0007
04/02/2025 08:30:48 System Network Interface restarted. 0x0002
04/02/2025 08:16:35 Device UPS: A discharged battery condition no longer exists. 0x0108
04/02/2025 08:16:35 Device UPS: The battery power is too low to continue to support the load; the UPS will shut down if input power does not return to normal soon. 0x010F
04/02/2025 08:16:35 Device UPS: RFC1628 MIB UPS is on battery. 0x3601
04/02/2025 08:16:35 Device UPS: On battery power in response to distorted input. 0x0109

[Teken]

What are the results to the questions and tests?!? 🤔

[jwood_ok]

Unfortunately, I was not given any information on the battery catridge.  I was given based on the unit being unplugged from AC:

I got ~20 minutes of uptime on the UPS with normal load. The capacity said 8% before I started, then went down slowly, even though it continuously said there was less than one minute of runtime left.

[Teken]

Unfortunately who ever went on site just wasted everybody’s time. 🤦‍♂️

All of the tests and questions were posed by me were to help you and the company to narrow the root cause and reduce wasted resources and finances.

Regardless, the easiest thing to do is replace the battery cartridge and date the physical battery case.

Once installed the system will prompt the user to confirm a new battery cartridge. Toggle from No to Yes and enter the month and year than select enter.

Allow the new battery cartridge to display 100% SOC. Once the system indicates 100% SOC manually initiate a Self Test.

Once complete, allow the battery cartridge to return to 100% SOC. Complete the process by manually initiating a Battery Calibration with at least 30% attached load.

Once complete allow the battery cartridge to recharge back to 100% SOC. These steps must be completed exactly as described here. ☝️

Report back the short / long term results with the following logs: Event, Data, UPS

Questions Ask . . . 👍