3.85kW System

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Case Study 3- 3.85kW System

Background

This installation is on a modern detached house with a south westerly facing roof. The pitch on this roof is 45° which does impact the output of the panels.  30° pitch is optimum.

Solar PV System Specification

  • 22 x BP 4175T Photovoltaic Modules (dimension 9100mmx3200mm)
  • 1 x StecaGrid 2000+ Inverter and Slave
  • 1 x OFGEM approved total generation meter
  • Schuco mounting system

Predicted System Performance

  • Output = 3071kWh/year
  • Income and Savings = £1713/year*
  • Income & Savings after 25 years £48,784**
  • Cost to install £21,945 (September 2010)
  • Payback time 13 years**
  • Average Annual ROI 8.9%

*Based on 13p/kWh current energy price

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