Smart UPS 3000 XL, run on partial battery pack?

Anonymous user · ‎2021-06-29

Hello:

I've got a Smart UPS 3000 XL (rack mount). The batteries are going on 5 years old, so I would like to recondition them with a separate battery conditioner. I pulled the battery pack and noticed that it has two 48V battery arrays connected in parallel (4 12V batteries for each of the two arrays, for a total of 8 batteries). Will it hurt anything to remove one of the arrays (4 batteries), and run the UPS on the remaining array of 4 batteries? It will take the conditioner about 3 weeks to complete so I want to make sure this won't harm the 4 batteries left in the UPS unit for this amount of time. This should maintain the 48 volts, but I'm assuming that the total runtime on battery will be lower, which is not a big deal at the moment. I just want to confirm that this won't cause the UPS to overcharge or do anything to the 4 remaining batteries since 4 are missing. I noticed that when I removed the 4 batteries, the battery meter on the front of the UPS unit was at 3 out of 5 bars, then the next day it was at a full 5 out of 5 bars.

Thank you for your help!!

--
Chris

Anonymous user · ‎2021-06-29

Hello:

I've got a Smart UPS 3000 XL (rack mount). The batteries are going on 5 years old, so I would like to recondition them with a separate battery conditioner. I pulled the battery pack and noticed that it has two 48V battery arrays connected in parallel (4 12V batteries for each of the two arrays, for a total of 8 batteries). Will it hurt anything to remove one of the arrays (4 batteries), and run the UPS on the remaining array of 4 batteries? It will take the conditioner about 3 weeks to complete so I want to make sure this won't harm the 4 batteries left in the UPS unit for this amount of time. This should maintain the 48 volts, but I'm assuming that the total runtime on battery will be lower, which is not a big deal at the moment. I just want to confirm that this won't cause the UPS to overcharge or do anything to the 4 remaining batteries since 4 are missing. I noticed that when I removed the 4 batteries, the battery meter on the front of the UPS unit was at 3 out of 5 bars, then the next day it was at a full 5 out of 5 bars.

Thank you for your help!!

--
Chris

See Answer In Context

Anonymous user · ‎2021-06-29

Just for the record, I've had half of the batteries removed for about 3 weeks and no issues, while I condition the other half of the batteries. In fact, the self test has passed as the unit has stayed online without any warning lights. Thanks again for the feedback.

Anonymous user · ‎2021-06-29

Hello:

I've got a Smart UPS 3000 XL (rack mount). The batteries are going on 5 years old, so I would like to recondition them with a separate battery conditioner. I pulled the battery pack and noticed that it has two 48V battery arrays connected in parallel (4 12V batteries for each of the two arrays, for a total of 8 batteries). Will it hurt anything to remove one of the arrays (4 batteries), and run the UPS on the remaining array of 4 batteries? It will take the conditioner about 3 weeks to complete so I want to make sure this won't harm the 4 batteries left in the UPS unit for this amount of time. This should maintain the 48 volts, but I'm assuming that the total runtime on battery will be lower, which is not a big deal at the moment. I just want to confirm that this won't cause the UPS to overcharge or do anything to the 4 remaining batteries since 4 are missing. I noticed that when I removed the 4 batteries, the battery meter on the front of the UPS unit was at 3 out of 5 bars, then the next day it was at a full 5 out of 5 bars.

Thank you for your help!!

--
Chris