This 900VA UPS backup battery from APC is designed for shoots with mains powered computers. As soon as the APC detects that there is not power from the wall, it will ring its alarm and provide power until the user can backup and shut down properly.

We want to make it very clear this isn't designed to run a digital setup for more than a few minutes - its not a generator.

See below for usage and power graph.

SPECS:

Output Max Configurable Power (Watts) 540 Watts / 900VA

Output Frequency (sync to mains)50/60 Hz +/- 1 Hz Unsynchronised, 50/60 Hz +/- 3 Hz Sync to mains

Load Crest Factor 3 : 1