An American-Swiss start-up has created a mechanical energy storage system to mitigate against the variability of renewables. When demand is low, excess renewable electricity is used to raise 35-ton bricks, which produce kinetic energy when they return to the ground under the force of gravity when electricity demand is high.
The BBC reports that a small town in Scotland will become the first to be completely powered by green hydrogen gas as part of the H100 project. A 200m wind turbine will generate electricity to power an electrolyser, which turns water into hydrogen gas and oxygen. The hydrogen will then be stored in pressurised secure tanks, before being pumped into people’s homes.