Case Study 1 - 3.68 kW Domestic PV installation
Cavills Solar were requested by Mr & Mrs Wade to design a sytem that would produce as much electricity as possible on the roof of their house of Andover. They had a shallow pitched east/west facing roof and wanted a large PV system in order to take full advantage of the feed in tariff (FIT).
After a consultation with Mr & Mrs Wade and a site survey, Cavills Solar recommended the installation of a 3.68 kWh system. This system consisted of 16 solar PV panels connected to a SMA tracking inverter.
Return / Savings calculations:
We have calculated that the Wades will receive the following returns / savings:
- 3.68 kW of panels, will over a calender year, produce an estimated 2800 kW / hours of output. 2800 units produced x 43.3 pence per kiloWatt = £1230 income p.a. (from the FIT or geneartion tariff).
- 1400 @ 3 pence per kiloWatt = £42 (half of which is assumed to be the amount going back to grid). Savings on their present electrcity bills of £336 p.a.
Therefore the Wades can expect a yearly return of £1608 (this of course is index linked and tax free for 25 years).