After quite a bit of digging I found out that most APC ups would probably work. I installed the Back-UPS BR1000MS (comes with USB cable) in Ubuntu 14.04 and also installed the apcupsd package which worked great in Linux. I tried to set up my DS112 to connect to the acpupsd and discovered that the Diskstation is set up to work with the nut package (Network UPS Tools). So i installed nut in Ubuntu in master mode and configured the diskstation to connect to the nut server. Success.btodd01 wrote: ↑Tue Apr 24, 2018 10:57 pmI couldn't figure out how to edit my post. Turns out that the APC guy recommended the APC BR1000MS 1000 VA Pure SineWave 10 Outlets 2 USB Charging Ports Back-UPS Pro Battery Backup. I see the BR1000 not MS. Just wondering if anybody has had any experience with this and whether will interact properly with this UPS.
I am sure that if I installed the ups on the diskstation (via usb) that it also would have worked just fine but I'm not sure I could get my linux pc to connect to the ups via diskstation.
In summary I discovered that most new ACP ups's and probably othet brands will work with most devices. If you have several devices that connect to the ups setting up one machine as the server and the rest as clients work pretty well.
The way I set mine up, all devices will run for 20 + minutes and when battery starts getting low it will shut down the the server. Clients poll the server and you can get them to shut down first - after doing some reading.
When I tried looking at compatibility, I found out that newer ones may not have been tested but bigger brand names(lots of ACP models) were likley supported via nuts or apcupsd servers running on linux and other platforms.