Green Energy Lab, a research initiative for sustainable energy solutions, is part of the Austrian innovation campaign “Vorzeigeregion Energie” (“Showcase Region Energy”) of the Climate and Energy Fund. Green Energy Lab is Austria’s largest innovation laboratory for green energy. It comprises the test markets Vienna, Lower Austria, Burgenland, and Styria—all in all about five million end customers. More than 100 partners from research, industry, and the public sector join the energy suppliers of these four Austrian provinces, namely “Wien Energie” in Vienna, “EVN” in Lower Austria, “Energie Burgenland” in Burgenland, and “Energie Steiermark” in Styria, in order to develop customer- and demand-oriented, scalable solutions all the way from prototypes to marketability. Thanks to Green Energy Lab’s direct access to the core market of energy suppliers, new developments can immediately be tested on a large scale. By 2025, Green Energy Lab will have invested 100 million euros in innovative projects.