APC Smart-UPS 1500 (SMT1500) Performance Analysis. As the Smart-UPS 1500 is a line-interactive UPS, there’s a delay between the time the power is cut to when the system is restored on battery power.

I've got a couple of ~10 year old APC UPS that I have my home rack plugged into. A recent power outage killed the battery on the SMT1000 and while I was waiting for a replacement battery to ship ...