Tiit Nurmela’s house, in Norrtälje Stockholm, is equipped with solar panels with a peak effect of 10.8 kWp*. During 2019 a total of 8,000 kWh or energy were generated, of which only 3,000 kWh were used. A geothermal heat pump was installed in December 2019, which further increases the amount of excess energy being produced […]