Unpredictable returns.. of investment

We had a refreshing summer storm yesterday here at Degerö, with gust speeds exceeding 20 m/s. For our house, it meant more than 50% energy surplus as the 5 kW wind turbine generated 2.6kW in average for more than 20 hours. It’s a record this year. Peak power reached 8.2 kW after which the turbine automatically slowed […]