An honorary german article, for the Association of Founders and Self-Employed Germany (VGSD e.V.). - The report covers the possibilities of self-power generation for small and medium-sized companies in Germany. We are using the example of a fictitious photovoltaic plant by Koblenz. Financial and regulatory issues will explain by an investment calculation. The report considers only photovoltaics for power generation. Other topics are Green IT and Local Energy Solutions. Local Energy Solutions shows the possibilities of DLT-Systems (blockchain) to open the energy market for private actors.