Voltalia Begins Commissioning of 10.5 MW Sinnamary Biomass Power Plant in French Guiana

Voltalia, an international renewable energy company, has announced the start of commissioning at its 10.5-megawatt biomass power plant in Sinnamary, French Guiana. This new facility joins Voltalia’s existing biomass plants in Kourou (1.7 MW) and Cacao (5.1 MW), both already operational, further expanding the company’s renewable energy footprint in the region.

The first boiler ignitions, a key step in the commissioning process, took place in early April 2025, initiating the plant’s technical testing phase. Once fully operational, the Sinnamary facility—set to become the largest biomass power plant in French Guiana—will provide up to 8 percent of the territory’s electricity needs. Robert Klein, CEO of Voltalia, commented, “The Sinnamary biomass power plant marks a turning point for French Guiana: it demonstrates that it is possible to produce low-carbon, reliable, and competitive energy locally, using resources from the territory. With this commissioning, Voltalia is directly contributing to strengthening French Guiana’s energy autonomy and the resilience of its power grid.”

Located on the Petit Saut site, the plant has an estimated annual production capacity of over 80 gigawatt-hours. The project plays a vital role in leveraging local resources to diversify and decarbonize French Guiana’s energy mix.