I've tried to get APC's powerchute software to work and after a month dealing with them (but actually getting it up and running) there are much easier ways of going about it than hooking it up to your ESX hosts. I will say this was about a year ago and their first gen of the product, but my first impressions weren't good and have never even though about going back to revisit it. At the time all they did was took their free Linux version of the software and re-branded it for "VMware ESX" plus charged you 100$ per copy and made it so the linux version wouldn't install on ESX. Nothing changed, just complete 100% copy of the product but with a different name. I worked with their support for 2-3 weeks going back and forth and had me jumping through hoops, adding switches, changing the procedure that was published to get it to install, installed additional pieces, trying steps in different orders until it worked... it was bad.
In short what I decided to do was just install the powerchute software on a windows (or it could be a linux box) with the free copy and have it just execute a powershell script that would shut down the VM's and the hosts. It is much cleaner and more controlled that way anyways.
"RParker wrote: I guess I was wrong, everything CAN be virtualized "