What it costs: photovoltaics | Features

Photovoltaic systems	Capital cost £/kWp	Net present value for 60 years	Service life years
Monocrystalline
Monocrystalline silicon-based modules to IEC 61215, 150W nominal rating	7,000	13,700	25-30
Polycrystalline
Polycrystalline silicon-based modules to IEC 61215, 130W nominal rating. 10m² roof area	5,800	11,740	25-30
Polycrystalline silicon-based modules to IEC 61215, 65W nominal rating	6,200	13,340	20-25
Polycrystalline silicon panels integrated with roofing tiles or slates. PV tiled area 8 m²	6,500	13,870	20-25
Thin-film
Thin-film amorphous silicon photovoltaic cells to IEC 61646 integrated single-ply membrane roofing system. Roof area 35 m²	7,000	17,140	15-20
Notes: Costs are based on an installation with a nominal output of 5kWp. Aluminium mounting and frame, tempered low-iron glass, EVA encapuslant unless otherwise stated. System linked to the grid. Life-cycle costs include for cleaning, inspection, electrical checks, minor repairs and component replacement at the average of the range. A discount rate of 3.5% is used to calculate net present values. Costs are averages. Further information: Building LifePlans provide latent defects warranty for buildings www.blpinsurance.com. For building component durability information contact: peter.mayer@blpinsurance.com