Gravitricity has just constructed a demonstration project using a 15-metre high rig, assembled at a grid-connected site at the Port of Leith, Edinburgh. The demonstrator uses two 25-tonnes weights suspended by steel cables. In one test we’ll drop the weights together to generate full power and verify our speed of response. Gravitricity develops low-cost techniques for sinking shafts exactly where storage is required. This means storage can be deployed to save money on electricity use infrastructure such as EV Charging Stations, or to save on grid-connection costs for intermittent renewable generators.