"If every stove in America were shipped with a battery, it would add up to tens of gigawatts of power, Calisch said. That’s capacity that can be aggregated and tapped when the grid is stressed."
Back of an envelope calculation: 100 million distributed batteries × 10 kWh each = 1,000 GWh = 1 TWh. If those batteries could each provide 5 kW: 100 million × 5 kW = 500 GW. That would be comparable to, or larger than, the entire short-duration storage requirement in some US 100%-clean-grid scenarios.
Of all the many forces working in renewables favor, here's another. The grid storage a 100%-renewables grid needs can be largely self-building. Decentralized self-building systems always win out against inefficient centralized systems in the end.
How smaller, distributed batteries could help the grid