What innovation by James Watt made reliable, location-independent power available for textile mills?

Answer

Steam engine with an external condenser

James Watt’s continuous modifications to the steam engine, notably the design with an external condenser in 1774, made reliable, location-independent power available.

What innovation by James Watt made reliable, location-independent power available for textile mills?
inventionmachineIndustrytextileManufacturing