The existing factory is "Designed for capacity of 10,000 fuel...

The existing factory is "Designed for capacity of 10,000 fuel cell stacks per year" but there is room for expansion within the existing building and they have an option over adjoining "greenfield" site. If I remember correctly, those would give them production of 160,000 units/year.

That's for Gennex units. I have no idea how much additional space or time Bluegen assembly takes up. (But when the integrated mCHP orders come, I expect them to dwarf Bluegen sales by several orders of magnitude.)