If by 30% tax credit you mean they are being handed enough money to pay for 3x the net capacity in renewables and then having their energy price subsidized by a

If by 30% tax credit you mean they are being handed enough money to pay for 3x the net capacity in renewables and then having their energy price subsidized by an amount higher than the total cost of unsubsidized renewables on top of that, and that rate payers must pay however much they spend on it no matter how far over budget it goes, then yes.