NS 1080 doesn't back up during loss of power

[Norman_Long_Island]

I've had a Back-UPS NS 1080 for several years, but I don't think it ever switched to battery any time I've lost power. Any time there's been a sudden cut in power briefly my computer and monitor lose power instead of staying on. They are definitely plugged into the batter back up sockets and the display shows the battery fully charged but it seems to do nothing when there's a power loss.

[Teken]

Based only on the information provided here it would appear the RBC is EOL and needs to be replaced.

If you conduct a manual lights out / grid down test by removing AC power the system should continue to run for a period of time.

If not, than it’s highly likely the RBC needs replacement. The RBC is rated to provide 2-5 years of service life based on usage, temperature, and environmental conditions.

Its designed to sustain 260 full depletion cycles baring the above caveat’s. Your options are to replace the RBC with APC branded / third party or rebuild the pack using HR cells.

Its more economical to simply purchase quality cells like the original CSB branded and rebuild the pack.

Your system came with two 12 VDC 7.5 AH cells tide in series to produce 24 VDC. Please consider buying 9 / 10 AH cells to obtain longer operational runtime.

NOTE: Do not count on the Self Test to determine the RBC state of health. By the time this circuit actually detects a failed RBC it’s literally EOL! ☝️

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[Norman_Long_Island]

It makes sense the battery would need to be replaced. I've had it for years but I wasn't sure because the display shows it fully charged and I don't remember it backing up even when it was new. Thank you.

[Teken]

Please replace the RBC and report back the results. As a gentle reminder the following action items must be completed if available.

Install Date: Using APC Power Chute Software update the battery installation date if available. As doing so resets internal counters and charging tables if applicable. 

Self Test: Manually initiate a self test via button, Power Chute and let pass & recover to 100% SOC (State of Charge).

Battery Calibration: Manually initiate a battery calibration with a minimum of 30% attached load or greater. Allow the process to complete and RBC to recover back to 100% SOC.

Doing so will teach the system the current battery health and better reflect the operational runtime via LCD if available / Power Chute.

Finalize by marking the RBC with the battery installation date / battery calibration.

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