Renewable energies show that the weather in Germany in May was not as bad as most people thought: The yield for solar managed a precision landing with 101 percent of the target value, and for wind 141 percent of the planned electricity was generated. "Even if most people felt that the weather was very bad last month, we can't say the same for the yield of renewable energies," says Markus W. Voigt, CEO of aream Group.

Germany was very well placed with 111 percent of its solar power target achieved, while Italy reached 104 percent in May. The outlier was again Spain with only 89 percent of the target. "This shows once again how important broad regional distribution is," says Voigt.

In terms of wind, on the other hand, last month made up decent ground: May was well above target, with 141 percent of the target achieved. "Overall target achievement, currently at 89 percent in the first five months, is also moving in the right direction after the division lagged behind in the first quarter of the year," says Voigt.