AirWall is like a generic name – like battery. An AirWall is some combination of compressor, engine, tanks, & generator and software. Any of these can be varied and tailored to the circumstances independently.
So engines could be larger, tanks can be added or made larger. Not only that, by running engines at different revs the same engine can operate through a power range. Plus by adding a mode 2 external clean burner you can immediately triple the capacity.
the political shift for traditional central utility players. One is basically taking about a shift from centralised to decentralise energy and consumer control.