CellCube Storage Systems Inc. announced the sale of a modular energy storage system to a French multi-national green energy developer for their internal technology proof of concept. CellCube's FB Modular will be deployed in the south of France near the city of Montpellier. The system will be collocated to a large-scale solar park and will provide multiple value streams for power delivery into the grid system. The company will additionally perform application testing for grid scale support services like primary control and several grid balancing features.