16.66kW School System

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Case Study – 16.66kW Solar PV System on Bedfordshire School


This installation is 16.66kWp system on the flat roof of a school building.  The array is facing slightly east of south and using special flat roof mounting brackets the panels are inclined to 20 degrees.  We had to account for some shading from surrounding roof profiles.

Solar PV System Specification

  • 68 x Suntech STP245S-20/Wd Solar Modules
  • 1 x SMA Tripower 15000TL Inverter
  • 1 x OFGEM approved 3-phase generation meter
  • FlatFix mounting frame

Predicted System Performance

  • Output = 10,950kWh/year
  • Income and Savings = £2759/year*
  • Cost to install £34,690 exc VAT (February 2012)
  • Payback time 12 years**

*Based on 15.2p Feed-in Tariff, 10p/kWh current energy cost, 100% usage.

**Assumes 2% inflation, 3% annual increase in energy costs