Buying used UPS

[Trilex]

Some one is selling a Eaton 5130 in fb for 80AUD$. Is it worth it, replacement battery cost nearly 300$. Can you just wire a battery to the connector? https://www.youtube.com/watch?v=jQIkmCAdqYg

[Aereldor]

Batteries are usually designed to be swappable. If it's being sold for that low, it probably needs new batteries anyway though. 

[leadeater]

Yes the UPS is rather good, for $80 totally worth considering. You should only use the proper replacement batteries for it which you can buy as you know. You cannot just buy any old Lead Acid/VRLA battery and connect them up to the UPS, it has a set working voltage range so you need to get the correct type, not all batteries are the same even of the same type.

 

I have a 9130 with my own external battery bank I made, dangerous work and should only be attempted if you know what you are doing and have experience doing it.

 

You won't get much run time on battery with the UPS so you should be installing it for the purpose of power protection and automated shutdown of devices if you need that. The battery bank I made for mine is huge, I got the batteries for free, but the UPS's have hard coded capacity values and enforced run time shutdowns so no matter how much capacity you connect to it the run time possible will not change.

 

Before investing a lot of money in to a UPS and any kind of battery systems make sure you look at why you are buying it

• Power protection : Buy a UPS
• Power loss protection (long time on battery): Grid Tied Inverter with batteries and sub board to power protected devices

[LWM723]

Yes you can wire up another battery, no problem. I've done that many times.

[Trilex]

On 2/19/2021 at 9:15 PM, leadeater said:

Yes the UPS is rather good, for $80 totally worth considering. You should only use the proper replacement batteries for it which you can buy as you know. You cannot just buy any old Lead Acid/VRLA battery and connect them up to the UPS, it has a set working voltage range so you need to get the correct type, not all batteries are the same even of the same type.

 

I have a 9130 with my own external battery bank I made, dangerous work and should only be attempted if you know what you are doing and have experience doing it.

 

You won't get much run time on battery with the UPS so you should be installing it for the purpose of power protection and automated shutdown of devices if you need that. The battery bank I made for mine is huge, I got the batteries for free, but the UPS's have hard coded capacity values and enforced run time shutdowns so no matter how much capacity you connect to it the run time possible will not change.

 

Before investing a lot of money in to a UPS and any kind of battery systems make sure you look at why you are buying it

• Power protection : Buy a UPS
• Power loss protection (long time on battery): Grid Tied Inverter with batteries and sub board to power protected devices

I'm only look to back up my server rack, just enough to shutdown. I'll check it out, thanks the the help!