According to the G3X installation manual, there are several 12 volt versions of the GAP 26 for experimental aircraft: 010-01074-00 (unheated), 010-01074-10 (heated but unregulated) and 010-01074-20 (heated and regulated). Looks as though you've got 010-01074-60, which is not listed in the experimental G3X installation manual, so I guess it's aimed at certified aircraft.