HDF Energy and its equity partners announced the start of the construction of CEOG Renewstable® Power Plant in French Guiana. CEOG is the world’s first multi-megawatt hydrogen power plant, and the large green hydrogen storage of intermittent electricity sources (128MWh). The Renewstable® power plant, designed and developed by HDF, will supply a 100% renewable, stable and dispatchable power to 10 000 households at a lower cost than the diesel power plant, but without emitting any greenhouse gas, fine particle, noise or fumes. A Renewstable® power plant produces electricity using local sources of clean energy to fully sustain the local needs, reducing exposure to oil price volatility, supply risks, and saving foreign exchange. Representing a total investment of USD 200 million, CEOG is an optimised combination of a solar park, a hydrogen long-term energy storage and a battery (short-term energy storage) to produce 24/7 baseload power. It is the first time that a renewable energy project supplies a grid through a capacity-based Power Purchase Agreement, usually used for thermal power plants. This type of electricity offtake contract guarantees the availability and stability of the electricity produced by CEOG. This last characteristic is essential for powering isolated grids or reducing congestion on large networks.