Sustainable energy solutions, such as renewable energies, energy storage and smart grids, are causing a transformation of the energy market and require a transformation of the companies operating in the field of energy. Consumer focus is shifting away from purely standard products and is accompanied by increasing customer demands. Customers want comprehensive, sustainable and affordable energy solutions. To meet these demands, companies need to adapt their product portfolio, create a customer journey that is aligned with customer needs, and develop internal processes that enable customer-centric offerings. Traditional energy suppliers must evolve into holistic solution providers for the energy transition at home. To successfully serve the increasing demand for sustainable energy solutions, it is necessary to have access to products and installation capacities and to enter into close partnerships with various partners. This leads to a more complex value chain.