Preliminary surveys by the German Association of Energy and Water Industries (BDEW) showed that renewable energies account for the largest share of the German electricity mix. According to the survey, renewable plants generated 30 percent of the electricity in 2015. The most important renewable energy source for electricity production is onshore wind energy, followed by biomass. In absolute terms, electricity generation from renewable energies rose from 162.5 to 194.1 billion kWh. BDEW attributes this record figure to favorable weather conditions and further plant expansion.

Green electricity customers make a particularly large contribution to the expansion of new plants in Germany - if they purchase high-quality green electricity that is certified with the Grüner Strom-Label. This is because the Grüner Strom-Label guarantees investments in new green power plants. In 2015 alone, the certification of green electricity tariffs with the Grüner Strom-Label made it possible to support at least 80 high-quality energy transition projects, including many renewable power generation plants.

The fact that consumers support the energy transition with certified green electricity continues to be important, as the expansion of renewable energies has stalled. According to information from industry associations, the addition of wind and solar plants in 2015 remained far below the previous year's level.