Comment by Animats

Good point on nomenclature.

A 100KW generator is no big deal. It's a truck Diesel engine coupled to a generator. Trailer-mounted, it can be towed with a pickup truck. It's a standard rental item for larger construction projects.

A 100KW laser is a big deal.

The big problem with this as an anti-drone weapon is that, unlike artillery shells or unguided missiles, drones can operate close to the ground, and the laser needs line of sight.