After connecting a new APC 1300 VA model number BX1300G UPS to a Windows Server 2012 Essentials system, I found that I didn't need to install the UPS manufacturer's software for monitoring the battery state in the UPS. Windows automatically detected the UPS and provided information on the battery charge for the UPS. I had previously enabled hibernation mode on the server, so I configured the system to hibernate when the battery charge for the UPS becomes critically low.
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