Technology Householder Stream – Average cost per unit Community Stream – Cost Ranges Solar £3,289 £1,764 - £132,000 Wind £16,610 £8,625 - £45,514 Hydro £10,876 £10,108 - £35,050 Ground Source Heat Pump £11,039 £2,200 - £177,628 Biomass £8,742 £9,131- £201,730 Biofuels n/a £44,460 District Heating £2,975 £27,500 - £66,629 Combined Technologies n/a £3,280 - £133,619 S2W-22222