Electricity grids used to be domestic plumbing. Cross-border interconnectors turned them into instruments of alignment, large power transformers turned them into strategic bottlenecks with two-year lead times, and remote attacks turned them into targets.
Stockpile the boring hardware
Transformer reserves, black-start capacity and manual-operation drills are the grid equivalents of ammunition stockpiles. States fund fighter squadrons on shorter lead times than they accept for the transformers their bases depend on.