Long duration storage costs need to fall substantially
A fascinating study on long duration energy storage (LDES) by a team from MIT, published in the journal Nature Energy, suggests that if costs of long duration energy storage fall to c.US$20/kWh then that would result in a 10% fall in grid power costs. The paper cites recent studies which suggest that usage of lithium-ion batteries is not viable (cost effective) for ESS once the share of renewables in the power grid exceeds a certain level. However, use of LDES would be economically viable if the renewable share of power generation exceeds the 80% level. Current costs of LDES mitigate...