Bobby Boucher wrote on Jan 9^th, 2013 at 12:35am:

The quick fix that would at least get us by.. would make it so that when the CaptainSim APU generator is on-line, the FSX APU generator was also "on" (bool)..  battery stays charged.. problem solved.. This has been an issue long enough, that it's fair for us to get impatient..

I agree with you. I feel awful for moaning but at the end of the day, it's an error in the design so should be addressed swiftly.