Decisions are made:
we will be using a Pixhawk (using Ardurover firmware) as the main unit. It will do all the navigation and steering tasks.
Via serial connection an Arduino will keep track of the health status (mainly battery / solar power) and will set drive modes according to that via MavLink (lower power – lower throttle for example..). It will also generate messages to be send via Rockblock (Iridium satelite network) like GPS position, voltages, speed, temp etc.
Now we are waiting to get all the stuff shipped!