Series.
As in Series Hybrids vs. Parallel. The "Volt" is a Series Hybrid.
So the Million Dollar question is did they change this Prototype Escape from Parallel to Series.
If my assumptions are correct and they have added a plug in capacity as well as swapped out for Lithium Ion Batteries, this would be a clone drive-train to the "Volt".
Does anyone see the pattern here and the significance of it?
Sounds series to me.
And one more thing... The Fuel Cell is as James Carville would say boob bait for bubbas... Any engine would work to run the generator.