In June, many people in Germany complained about the heat - but the sun still did not shine more than usual. This was also reflected in energy production from photovoltaics, which remained within expectations. Wind power, on the other hand, lagged behind. "For investors, diversification therefore remains the trump card", says Markus W. Voigt, CEO of the aream Group.

Germany managed to reach almost perfect production from solar energy in June, reaching 97 percent of the target. Spain was slightly below the target at 91 percent. Italy, on the other hand, overachieved its target with a figure of 131 percent. "In total, 106 percent of the target value has thus been achieved since the beginning of the year", Voigt said. "In other words, the plants exceeded the measured irradiation by a good six percent."

Wind, on the other hand, blew rather weakly last month. Here, the German plants recorded a target achievement of only 59 percent. That dropped the figure for the first six months of the year to 86 percent, down from 89 percent in May.

Nature cannot be predicted - depending on the location, wind strength and solar radiation are sometimes above and sometimes below target, causing the energy harvest to fluctuate. For investors, this means: "The decisive factor in renewable energies is a good mix of both energy forms and locations", says Voigt. If you only invest in one wind farm or one solar park, the fluctuations will hit you harder. If, on the other hand, the investment portfolio is well mixed, the returns from investments in renewable energies are easy to calculate. This is because short-term fluctuations in production always even out over the course of the year.