Of the UPSes that kept the test bed alive for between 21 and 26 minutes, Powercom's SMK-2000A lasted the longest with a runtime of 25 minutes, 41 seconds. But considering that the unit is rated at 2,000 VA, and not 1,500 VA as requested for this roundup, this unit really should have outlasted the other UPSes.
Even if you don't know anything about UPS power ratings, it's easy to see that something rated at 2,000 should contain 33 percent more of whatever than something rated at 1,500. So, in theory, the Powercom SMK-2000A should have lasted about 33 percent longer than average, which, for this roundup, was 24 minutes. Test Center engineers figure that the Powercom UPS should have lasted about 32 minutes. But just because it did not last that long doesn't mean that the Powercom UPS is not a worthwhile product.

The front panel indicators on the unit are good. It features separate bar graphs for load level and battery level, with additional indicators for line and battery status. The back panel features six protected outlets along with a pair of RJ45/RJ11 jacks for protecting network equipment from voltage transients. Of course there's also a serial port for communication with a server.

The documentation included with the Powercom UPS looks amateurish, but it is complete enough to refer to and written well enough to be easily understood. The output of this UPS is a clean sine wave regardless of whether it's on AC power or battery.