If he really made that exact argument, he was very much beside the point. Nobody is planning to use batteries to buffer grid energy production. Batteries are fo

If he really made that exact argument, he was very much beside the point. Nobody is planning to use batteries to buffer grid energy production. Batteries are for small-scale storage. For large-scale storage, there are much better mechanisms. Pump-storage hydro is already widely deployed but can't be built up arbitrarily. There are other technologies in development, such as storing energy in the form of compressed air, or as heat inside huge concrete blocks.