Sure, that's something that always was already possible... The Dude can check/graph/alert anything you can monitor over SNMP (so of course, you need SNMP functionality enabled on your APC UPS).Is it already possible to use SNMP for checking status of APC UPS?
we also built a small box that is monitoring input voltage and batt voltage und speaks with the mikrotik-ups-monitor
it also monitors the temperatur and turns a fan on an d off and sends email in case of overtemperature