The energy transition comes with challenges. Renewable energy still fluctuates in availability and power grids are not yet able to manage new supplies of energy. To overcome these hurdles, the Dutch research institution TNO developed 'PowerMatcher'. This smart energy system solution is a proven way to match energy supply and demand, get the most effective use out of green energy, and prevent overload. PowerMatcher turns ordinary power grids into Smart Grids that efficiently integrate green energy resources, and manage the load with more precision and efficiency. The TNO offers this technology on an open-source platform to accelerate innovation.