In the impact assessment supporting the current consultation on solar PV cost control, available at:"http://www.decc.gov.uk/assets/decc/Consultations/fits-review/4320-feedin-tariffs-review-phase-2a-draft-impact-asses.pdf"we estimate that an April 2012 reference installation of 2.6 kW or receiving the pre-consultation generation tariff of 43.3 p/kWh would achieve a return of 15% based on our central cost assumptions. We calculate that its annual generation tariff income would be around £960 and that its annual export tariff income would be around £35 (assuming 50% of electricity produced was used onsite). As well as direct FITs income, an installation will have other income streams which feed into the return calculation (bills savings, post-tariff revenue). For more details on DECC's methodology for calculating returns is available at:"http://www.decc.gov.uk/assets/decc/11/consultation/fits-comp-review-p1/3742-explanation-rate-return-calc-domestic-pv.pdf"DECC is collecting evidence to update its cost estimates to support the Government response to the current consultation on solar PV cost control, available at:"http://www.decc.gov.uk/assets/decc/Consultations/fits-review/4309-feedin-tariffs-scheme-phase-2a-consultation-paper.pdf"The consultation closes on 3 April.