From some sites/charts, the average cost per KW/Hr is about 15 cents in the US (9.3 cents in MS where I live). That makes the current credit to be 15% to almost 25% of current costs - expiration of the credit should decrease wind farms, but I’m sure they’ll find an even more expensive way of supporting/requiring them.
average cost per KW/Hr
- - - - -
That unit makes no sense. Did you mean kWH? (kiloWatt-Hour)