Originally Posted by
LTNman
I used to install UPS's and they have a limited lifespan so I wonder if anyone changed the batteries when they time expired? Best to do it every 3 years but many companies forget which isn't helped when they sack their IT staff.
In large commercial systems UPS's are banks of batteries that the systems always run off. External or backup generator power trickle charges the batteries. There is no 'changeover' as far as the systems are concerned all power comes from batteries all the time. If someone is really determined they can break the rectifiers providing normal power to the machines - but that should be of no consequence to a remote backup system which would seamlessly take over and users should not notice.
We are not being told the whole or even partial story - quelle surprise!!