You actually don’t need a multiplicator of 60Hz (or for sensible areas of the world 50Hz) of shot frequency to get AC. So a shot frequency of anything like 512Hz and 435Hz the next minute works. Energy is stored in capacitors and can be drained in a controlled fashion. You’ll probably need to double the number of output capacitors to get it running smoothly, switching between the banks at each shot. But that gives you the advantage that you’re utilizing the generator only for the amount of energy required.