Solar powered, long endurance air vehicles are really only valid between 40N and 40S. Above the Artic and Antartic Circle pretty much a non-started for many months of the year.
So in the same way the British forces don't tend to use desert sand paint when in Norway, and probably left their skis behind when going to Iraq, what you are saying is that Zephyr 8 is best used where it is appropriate to use it?