German coal giant LEAG, which runs a total of four open pit lignite coal mines and four coal-fired power stations in Eastern Germany, has pledged to reinvent its product offering in a dramatic shift towards renewable energy with the help of iron-flow energy storage provider ESS and potentially others. The company is looking to replace its coal-fired power plants with a mix of renewable energy generation and long duration energy storage technology to directly replace the functionality of its coal-fired power stations, once technologies have been proven at a small scale the company is looking to deploy between 2-3 GWh of long duration energy storage alongside 7 GW of renewables, eliminating up to 20 million tons of carbon dioxide per…