Attacks on two DTEK solar farms last spring is a good example. They destroyed many solar panels and some of the transformers, which step up voltage for long distances or step it down for use in homes. Replacing the transformers and swapping out destroyed panels allowed the farms, which generate 400 megawatts, to be back up in seven days.
Timchenko said an attack on a thermal generating station, which experienced a similar amount of damage, took three to four months to rebuild.
You seem to be thinking small scale, the concept is decentralised electrical generation nation wide.
Not centralised energy generation such as a single solar plant, a single wind turbine field, a single coal plant, a single nuclear plant.
To cluster bomb a single PV plant (in one attack) would be “easy”, just as easy as a single coal plant.
To carpet bomb a whole nation (in one attack) with PV panels on every home, building, school, sports centre, field, farm would be logistically challenging.