I have 2007 Encore and a couple of years ago had a similar problem. What I found that was causing the problem was the battery disconnect switch. On my unit this switch (solenoid)is located in a compartment behind the left side duals. If you can locate the switch, I would suggest bypassing it temporary to see if your problem goes away. One other thing that can be wrong with this switch, mine was mounted wrong. To operate properly, the solenoid has to be mounted up or down, it will not operate correctly mounted on it's side.
Hope this helps.