I am having problems with my 912 ULS. It has 250 hours on the Hobbs. I have a relatively new Odyssey PC680 battery in it and I keep it on an Odyssey trickle charger. Despite the charger showing 5 bars as fully charged, the battery voltage on the second start of the day, after flying for over an hour, can drop from 12.3 to 10.4 while trying the start it. The initial start of the day goes great and it fires off immediately. I have changed the battery, the Ducati regulator rectifies and the AV5001 fuse panel and associated wiring so far. I intend to replace the battery again tomorrow. I am looking for any suggestions at this point to track down the intermittent problem. Thank you all in advance!