With IPHost Network Monitor you can run simple snmp requests against a APC device in your network.
errorCondResolvedTime
error Cond Resolved Time
1.3.6.1.4.1.5528.100.1.100.5.1.1.7
The time the error condition was resolved (if it was resolved), in msec since 1/1/1970.
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IPHost Network monitor allows you to monitor errorCondResolvedTime on APC device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring APC uninterruptible power supplies right now.