Mitsubishi Heavy Industries (MHI) has announced a partnership with SSE plc, an electric utility company located in Scotland, for an energy storage demonstration project that will use two 40-foot cargo containers full of thousands of lithium-ion rechargeable batteries to store as much as 800 kWh of generated clean energy, with a maximum power output capacity of 2 megawatts. The recipient of the joint effort will be Scottish Hydro Electric Power Distribution plc, the arm of the SSE that's responsible for distributing power in Scotland.