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Title: Not Truly Parallel with the Grid
Review: This might or might not be a problem with all APC products, but we had an issue in my company where we were using this model APC UPS. All of a sudden, all power to the load disappeared, and the display on the APC started flashing, saying it had an F08 system fault. If you look that up in the Installation and Operation guide, it's a fan fault. I'm sorry: a fan fault disconnects the grid from the load? That's completely unacceptable behavior. The whole point of a UPS is that it's UNINTERRUPTIBLE!!! If the grid is ok, the load should be powered. Period. We are going to return all or most of our APC units and replace them with something better: a truly on-line double-conversion model that FAILS ON.
