energy source scale tariff (p/kWh) duraction (years) anaerobic digestion ≤500kW 12.1 20 anaerobic digestion >500kW 9.4 20 hydro ≤15kW 20.9 20 hydro >15kW - 100kW 18.7 20 hydro >100kW - 2MW 11.5 20 hydro >2MW - 5MW 4.7 20 micro-CHP <2kW 10.5 10 solar PV ≤4kW new 21 25 solar PV ≤4kW retrofit 21 25 solar PV >4kW - 10kW 16.8 25 wind ≤1.5kW 36.2 20 wind >1.5 - 15kW 28 20 wind >15 - 100kW 25.3 20 wind >100 - 500kW 19.7 20 wind >500kW - 1.5MW 9.9 20 wind >1.5MW 4.7 20