Large-scale energy storage batteries for the power grid
240KW/400KW industrial rooftop - commercial rooftop - home rooftop, solar power generation system.
To provide 2.1 TWh of storage would require 16 279 Hornsdale-scale batteries, costing a notional US$ 1.1 trillion at 2017 prices. However, the cost of large-scale battery storage, like Hornsdale (which has been recently expanded), has already fallen to about US$300/kWh and the price tag today may be about half that in 2017.