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Originally Posted by John Clay  |
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Sure it's consistent. The model that lasts 20 minutes at max load has an attached battery pack, instead of just the internal. |
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The 20 minute model shouldn't have been included in that comment - that's a model with a secondary battery as you mentioned....but for the other basic units the unit ratings are based on different run times varying from 3 to 8 minutes - that is inconsistent from an Electrical Engineering point of view.
If there is no industry accepted standard for the UPS spec, and there doesn't seem to be one, then the run time at maximum load should be part of the basic spec of each unit.
I'm not picking on APC here, Belkin and Cyberpower are actually worse when it comes to a decent electrical spec.
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