4.0kWp East/West

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Case Study – 4.0kWp East/West Array, Bletchley Milton Keynes


This installation is a 4.0kWp system mounted in an East/West configuration to achieve maximum output for the available space on this flat garage roof.  The panels are mounted at 10 degrees and the frame is weighted down wioth concrete paving stones to avoid having to penetrate the roof membrane.

Solar PV System Specification

  • 16 x Suntech STP245S-20/Wd Solar Modules
  • 1 x Aurora Power-One PVI-3.6-OUTD  16A Inverter
  • 1 x OFGEM approved single-phase generation meter
  • K2 East/West flat roof mounting frame mounting frame

Predicted System Performance

  • Output = 2926kWh/year
  • Income and Savings = £1590/year*
  • Cost to install £9,135 inc VAT (February 2012)
  • Payback time 6 years

*Based on 43.3p Feed-in Tariff, 13.75p/kWh current energy cost, 75% usage.