Bill Ponton’s new Report, “The Cost of Increasing Wind Power: A Reality Check,” contains a short but pithy section addressing the question of energy storage. Here’s the question to be addressed: If after the first round of overbuilding, adding new wind generation resources adds little useful energy and most of the added generation ends up getting “curtailed,” then why not just add some batteries or other energy storage to the system? Wind energy advocates suggest that some form of batteries can store the excess electricity production until it is needed, and everything will then just balance out in perfect [...]