Germany invests in energy storage technology to harvest cheap surplus energy from the renewables and balance supply and demand over time. The spot price for ele

Germany invests in energy storage technology to harvest cheap surplus energy from the renewables and balance supply and demand over time. The spot price for electricity here reliably oscillates between 30 and 50 € / Mwh per day, with occasional periods with negative prices on windy/sunny days. Energy storage can be used to pocket the arbitrage, so there is a direct incentive to deploy it.