In the People's Republic of Massachusetts (sorry, my politics are showing...) it is legal to utilize "net metering". That means one can use electricity whenever you want, generate at any level you like and whenever you want, and you only get billed for the NET amount you use (presumably zero or close) at the end of the month. So the utility is functioning as a huge battery, so to speak...
This is allowable (1) up to 60 kW (no problem for Listeriod-heads) (2) in accordance with the utilities interconnection guidelines and (3) with appropriate metering.
So, that's what I'm going to do. I'll utilize a common 5 hp, 3-phase motor (my shop has a 3 phase, 208 volt service) as an induction generator, running slightly over synchronous speed (i.e. 1835 rpm, as opposed to 1765 rpm as a motor). I'll just advance the governor knob until my ammeter indicates nearly fulll load amps on the motor and awaaaaay we go. No hassles with synchronizing, voltage control, etc., etc. I have a motor starter we'll use as a contactor.
The interconnection will require the following protection: Under/over voltage (IEEE symbol 81O/U), under frequency (IEEE 27) and reverse power (IEEE 32). All of which I have here in the shop in various places.
Wish me luck...
JS