Associate
- Joined
- 18 Dec 2008
- Posts
- 625
I bought an Eaton 3S 850 G2 back in November last year after I experienced a power cut that took out my Router and NAS for several hours. As it turned out the Eaton 3S not a very good UPS.
Mine failed after about 6 months of use. As the adage goes buy cheap buy twice. I discovered that the VA rating does not mean much and it’s the size of the battery and the quality of the inverter that matters. Eaton 3S is basically a glorified surge protector with a tiny battery not worth the £130 I paid.
I have replaced the Eaton 3S 850 G2 with an APC SMT750IC which works great in TrueNAS using the same usbhid-ups driver as the Eaton. It does cost 3 times as much, but I think it’s worth it, considering it costs less than a high-capacity HDD’s these days.
The Eaton failed to gracefully shut down my NAS three weeks ago during its first power outage despite draining the battery, and once a week thereafter it would shut down for no reason without draining the battery (it might even have been the UPS that caused the RCD to trip originally). I reached out to Eaton who claimed the original power cut could have corrupted the firmware and advised a factory reset, but I find that hard to believe.
So, the moral of this story is if you are looking for a UPS get one that is a real line‑interactive, pure sine wave output, with a large battery, and efficient inverter.
Mine failed after about 6 months of use. As the adage goes buy cheap buy twice. I discovered that the VA rating does not mean much and it’s the size of the battery and the quality of the inverter that matters. Eaton 3S is basically a glorified surge protector with a tiny battery not worth the £130 I paid.
I have replaced the Eaton 3S 850 G2 with an APC SMT750IC which works great in TrueNAS using the same usbhid-ups driver as the Eaton. It does cost 3 times as much, but I think it’s worth it, considering it costs less than a high-capacity HDD’s these days.
The Eaton failed to gracefully shut down my NAS three weeks ago during its first power outage despite draining the battery, and once a week thereafter it would shut down for no reason without draining the battery (it might even have been the UPS that caused the RCD to trip originally). I reached out to Eaton who claimed the original power cut could have corrupted the firmware and advised a factory reset, but I find that hard to believe.
So, the moral of this story is if you are looking for a UPS get one that is a real line‑interactive, pure sine wave output, with a large battery, and efficient inverter.
