Electronics > Beginners

Checkng Smart UPS Inverter funcion

<< < (3/3)

smallfreak:

--- Quote from: Jeroen3 on May 30, 2023, 10:53:42 am ---When you buy two of the same you could opt to balance them before placing in series in the unit. I'd assume this is the reason for the price of the genuine ones.

--- End quote ---
Just to provide a summary...

I certainly did not want to change chemistry. All my previously listed batteries were Lead-Acid variants ranging from "High-Quality" to "Great Value", depending on the marketing blahblah...

I did order a set from the cheap end of the list, balanced them overnight to +/- 1mV before I put them in series. The UPS attested them a 70% charge and after fully charging they were accepted as good.

Inverter is working fine, run time is within specs. So all perfect with the device.  8) :-+

I managed to grab an old service manual where there is listed a series of checks to determine the proper function. One of it is a load/runtime test with various loads up to the full 450W (700VA). I did not do THAT, since I assume that draining the entire charge within 4 minutes  :o  will noatably reduce battery life.

I'm glad that this 20 year old UPS (manufactured in 2003) is still good like fresh, although I learned about a long standing "R38" thermal design problem with these models that might need attention in the next 20 years.

darkspr1te:
If the UPS is one of the many APC smartUPS types then you can reset the battery parameters via the USB/serial cable.
see
https://networkupstools.org/protocols/apcsmart.html
for details


darkspr1te

Vovk_Z:

--- Quote from: smallfreak on June 05, 2023, 09:33:33 am ---Inverter is working fine, run time is within specs. So all perfect with the device.  8) :-+
......
I'm glad that this 20 year old UPS (manufactured in 2003) is still good like fresh, although I learned about a long standing "R38" thermal design problem with these models that might need attention in the next 20 years.

--- End quote ---
Nice to hear a feedback.
But the year 2003 may mean it needs recap electrolytes. I don't remember the whole story about whether it was done. Typically all 22 uF 25-50 V, and several large ones.

Navigation

[0] Message Index

[*] Previous page