Järkisähkö 24 kk Järkisähkö 24 kk is a fixed term agreement for a longer period. Järkisähkö 24 kk facts Fixed term After ending date the agreement continues valid until further notice. The product and price may change. Combined energy sources The electricity is produced with both renewable and nonrenewable energy sources, f.ex. nuclear energy. For households Järkisähkö 24 kk is a product for households whose electricity use is less than 100 MWh a year. Make your agreement online