[EVO X]

Would they leave their machines on 24/7 though? 3 years seems a little short. We turn our machine off overnight, and dont usual,y stsrt it up till around noon, and our battery backups have lasted several years usually.

If you shutdown power to your UPS every night you are going to get longer protection from the device than if you let it run 24/7.

[BiglyCommentary]

Constant thermal cycling of electronics ages parts. I never turn off my systems and have had very, very few failures.