All the apcupsd_* variables print "N/A", there is nothing printed on the console, even with -DD. I had to specify ${apcupsd localhost 3551} even though this should be the default, but w/o this it would constantly print "Conky: APCUPSD getaddrinfo: Name or service not known" to the console. This is with conky 1.8.1 running on Ubuntu 11.10 x64. The Ubuntu bug report...
2012-04-10 04:43:33 PDT in Conky