Hey As, I am not concerned as much about run-time during a power out situation as much as just being able to keep my PC running when the UPS is plugged into a live (normal) power source. The wording on a UPS is kind of deceiving. You would think that a 900w UPS has a 900 watt output only when the line power is out. However it actually means that it can only handle 900w of load power (anything after the ups) at it;s peak performance no matter if the line power (utility) is on or off. 1 minute of run time is enough for me as I am just mainly getting the UPS for protection from grid anomalies.