That isn't at all what the article is talking about. It's talking about using battery farms to provide support to the electric grid for transient spikes in dem

That isn't at all what the article is talking about. It's talking about using battery farms to provide support to the electric grid for transient spikes in demand, a role that is more traditionally served by hydro-electric generators and natural gas. Using batteries to support the grid allows grid operators to reduce costs that arise from having to pay for standby capacity, as the batteries can supply power while generation capacity that is slower to respond comes online. It's not a panacea for grid operators by any means, but it's definitely a useful tool to have at hand.