An 'iron-air' battery has been developed in the US that can store electricity from wind or solar power stations for days at a time, slowly discharging it to the grid. The Iron-Air battery is a 'new class of cost-effective, multi-day energy storage system,' that can feed electricity for 100 hours at 1/10th the cost of lithium-Ion, the 'holy grail' in terms of renewable energy technology. These battery modules are grouped together in modular megawatt-scale power blocks, which comprise thousands of battery modules in an environmentally protected enclosure. Depending on the system size, tens to hundreds of these power blocks will be connected to the electricity grid. In early 2018 the first small scale tests of the new battery technology began and in 2020 they were able to purchase the patents of an Arizona-based battery company.

Source: Daily Mail July 22, 2021 15:11 UTC