Smart-UPS RT 5000 XL

[ssahl6934]

We have a Smart-UPS RT 5000 XL with one external battery. 

After running a self test, which runs every 14 days, now it gives the message 'Discharged Battery the battery power is too low to support the load.

LOad is 49%   

battery capacity 100%

input voltage:   209.1 VAC

Output Voltage:   207.7 VAC

Runtime remaining:  16sec

status shows:

Last battery transfer:   UPS Battery test

Internale Temperature:  23.8C

Runtime Remaining:  16sec

Input Voltage:  208.6 VAC      @ 60.0 Hz

Output Voltage:  207.9 VAC    @ 60 Hz

Load Current:   8.4 Amps

Output VA:   34.9%

Output Watts:   48.8%

Battery Capacity:  100.0%

Battery Voltage:  218.2 VDC

Num of External Batteries:  1

Rated Output Voltage:  208 VAC

Bypass Upper Voltage:  255 VAC

Bypass Lower Voltage:  160 VAC

Output Frequency Range  Auto 50/60 Hz

I've ran a UPS Self Check and a Runtime Calibration, this will take the battery capacity down to 20% or so and start spitting errors then show a 3sec runtime until it charges back up to 100% then gives me 16sec runtime.

last battery Replacement:  may  2023

Total Battery Capacity   0  (Amp Hours)