Getting ready for hurricane season and I'm doing my monthly generator check. The generator (Troy-bilt 11,000/7550 watt) is producing AC just fine. It ran things during the last two hurricanes without a problem 120/240 volts and 60Hz. I went to check the 12VDC output for battery charging and its only 8.5 volts. Its not a real big deal, I keep a trickle charger on it to keep the starting battery up, and I can't really see needing to charge batteries from the generator, I just like things to work the way they are supposed to. Any ideas on why I'm getting low dc output?