Well I dropped the airplane off at Aircraft Systems, Inc. (Rockford, IL, KRFD). If anyone can figure this out Terry Norris can. Sometimes when I try to engage the starter all electrical power drops off line. If I toggle the master switch several time, sometimes it come back. Other times during cruise the alternator goes off line and I see almost 30 amp draw. I've changed the master switch, battery solenoid at the battery; and just last week at annual the mechanic changed the battery (which wasn't old and seemed fine to me). The problem is the problem is intermittent. It is hard to figure out when you can't duplicate it on demand. Hope this solves the problem, we want to fly the Mooney to Sun N Fun next month.