Electrics

I know there are a lot of really talented and knowledgeable people out there. Maybe one of you has the answer I'm looking for. I have one of those aircraft which has to have an entry "Electrics always on" in the Aircraft.cfg file or the battery runs down and goes dead. Entries in the Aircraft.cfg file, other than the above don't seem to have any effect. It seems as though there needs to be an entry in the air file designating either a generator or an alternator. I have scoured the air file very carefully but can't find anything relevant (of course there are still quite a few unknowns). Anybody have any ideas?