Germany’s Association of Energy and Water Industries (BDEW) reports that renewable energy supplied nearly 21% of the country’s electricity during the first half of 2011.

Wind, biomass, solar, and hydro power plants generated 57 TWh during the first six months of the year, amounting to 20.8% of supply. Solar photovoltaic (solar PV) systems on rooftops of homes, farms, and factories generated 3.5% of the national supply, exceeding for the first time the quantity of electricity, 3.3%, produced by conventional hydroelectric power plants.

Wind generators produced 7.5% of Germany’s supply, and biomass 5.6%. For comparison, 57 TWh would have been sufficient to provide nearly 40% of California’s electricity consumption during the first six months of 2011.

This affirmation of the achievements of Germany’s renewable power promoters comes at an interesting juncture. BDEW is led by Hildegard MĂ¼ller, a political ally of Germany’s chancellor Angela Merkel and a one-time leading figure in the CDU, Germany’s ruling conservative party. MĂ¼ller and the BDEW have become increasingly vocal in their support for more renewable energy development in Germany. In April this year, following the Fukishima disaster, MĂ¼ller publicly called on Angela Merkel and the CDU to abandon nuclear power no later than 2023.