Power Electronics: The Invisible Critical Layer

Every watt of renewable generation passes through power electronics — inverters, converters, grid-forming controls. As inverter-based resources (IBR) displace synchronous generators, grids lose the inertia and fault current that traditional protection systems depend on. This is creating a trillion-dollar re-engineering problem: utilities must retrofit protection schemes, deploy grid-forming inverters (not just grid-following), and install synchronous condensers to restore stability. Companies at this intersection — Hitachi Energy, GE Vernova, Siemens Energy at scale; Grid Solutions, Amsc in niches — are seeing multi-year order books. This is a capital equipment supercycle, not a software story, and should be underwritten accordingly.