In Germany, the tariffs and the degression rates are usually revised every four years but some additional adjustments are possible and have been recently used for photovoltaics. In response to the increasingly rapid deployment of solar power, the government introduced a volume responsive degression system in 2009 for photovoltaics.8 The system was revised in 2010 and in 2011 as solar generation capacities continue to expand at a high pace. These adjustments have been insufficient to control the development of photovoltaics and the government is revising again the support measures. Feed-in tariffs should be cut further and the degression system could be made more efficient by basing it on an analysis of price elasticities.