This is forwarded from gentoo bug #408893 (https://bugs.gentoo.org/show_bug.cgi?id=408893).
The output of all apcupsd related commands is N/A. This bug was confirmed from a second user as well.
The sample conky configuration used was:
${apcupsd localhost 3551}
${apcupsd_model}* ${apcupsd_status}
Mode: ${apcupsd_upsmode}
LOAD :${apcupsd_load}% TIME LEFT:${apcupsd_timeleft}m
Capacity: ${apcupsd_charge}% ${apcupsd_temp}
Load Bar: ${apcupsd_loadbar}
This was reported two years ago in v1.8.1 though it was never fixed.
https://sourceforge.net/tracker/?func=detail&aid=3083859&group_id=143975&atid=757308
If you build from source you could try using the debian patch for apcupsd.
http://patch-tracker.debian.org/patch/series/view/conky/1.9.0-2/fix-apcupsd.patch
You can also get the same information using "apcaccess status" in a script.