The growing mismatch between Germany’s renewables capacity and the strength of its electricity network is leading to curtailment, crazy pricing and challenges for neighboring nations. Although Germany is generating record amounts of clean energy in the north, its grid is too weak to transport all the power down to load centers in the south — a longstanding challenge for the country that's only getting worse. One of the most visible effects of this renewable energy saturation on the German grid is negative wholesale electricity prices, or times when consumers are effectively being paid to use excess power.