BayWa earnings before interest and tax from renewables showed a loss of almost €21m in the first three quarters of 2018, compared with a positive showing of just under €50m last year.
The company said project sales in the clean power business unit were not on a par with the level seen in the same period on 2017.
Previously projects totalling 250MW had been sold, but so far this year only 47MW has been offloaded.
Revenue from renewables was also down in the first nine months of 2018 to €827m from €844m.
BayWa said it expects to see a “significant jump” in earnings due to the sale of solar and wind farms totalling 450MW in the fourth quarter.
These anticipated sales will mean year end results are expected to exceed the previous year’s result, said chief executive Josef Lutz.