3.76kW System

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Case Study 4 – 3.76kW System

Background

This installation is 3.76kW system on the roof of a rear extension of an Edwardian property.  The array is facing in a south easterly direction, inclined to 30 degrees.  This job was a little more complex in that we had to reinforce the roof structure before installing the PV panels.

Predicted income and savings = £1278 per year

 Solar PV System Specification

  • 16 x Canadian Solar CS6P-235P Polycrystalline Solar Modules
  • 2 x Sunny Boy SB1700 Inverters
  • 1 x OFGEM approved generation meter
  • Schletter mounting system

Predicted System Performance

  • Output = 2471kWh/year
  • Income and Savings = £1278/year*
  • Income & Savings after 25 years £37,684**
  • Cost to install £13,825 (February 2011)
  • Payback time 10 years**
  • Average Annual ROI 10.9%**

*Based on 10.4p/kWh current energy cost

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