http://www.oekostrom-vergleich.com - Extraenergie Ökostrom Testbericht von Ökostrom Vergleich. Der Ökostromanbieter Extraenergie im Test. Kritik und Erfahrungen inklusive.Extra energy is a green energy provider Neuss, which is active in the German market since 2009. It is the company is a product of the extra energy GmbH provides extra energy the way, not only in Germany priced green electricity ("extra power"), but also gas tariffs with climate-neutral natural gas ("extra gas").