2018 was a record year for solar panel owners. The yield was 10-25% higher than expected, according to calculations by researchers from Utrecht University. It is striking that owners in the east of the Netherlands benefit most.
"We were already saying this in October, when many owners had generated the same amount of energy with their solar panels as they would usually have done in an entire year. With the sunny weeks in the last quarter, especially in October, we now see a record yield," says Wilfried van Sark, professor of solar energy at Utrecht University.
Compared to the long-term averages from 1981 to 2010, in 2018 solar panels had about a 10-25% greater yield, depending on the location in Netherlands. The national average surplus yield in 2018 compared with 1981-2010 was 18.9%.