Au contraire, most of the power would go to an automatic shunt system to earth ground in the event the grid was lost. I think you'll find many electrical generating systems have a shunt capability and/or a phasing offset designed to neutralize the no-load flyback and over-voltage runaway.

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The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)