After a site visit and consultation with the client, we recommended the installation of a 3.70 kWh system. This system consisted of 20 Solar Century panels (roof 1- the panels will be laid in 3 rows of 3 panels in landscape. Roof 2 – 1 row of 3 panels in portrait. Roof 3 - 4 rows of 2 panels in portrait). All of the modules located on roof 1 and 3 were powered by 2 SMA SB1700 inverters. The 3 modules on the remaining roof were powered by individual Enecsys micro inverters.
The chart below shows the expected electricity generation of this system and the income that is produced by the feed in tariff. Note also that an electricity saving is made since the client no longer has to pay for the amount of electricity that his system produces.
|
System Size |
3.70 kWh |
|
Annual Generation kWh |
3,179 |
|
Electricity Saving @ 10 pence per kiloWatt |
£158.95 |
|
Feed In Tariff Income @ 43.3 pence per kiloWatt |
£1376,51 |
|
Export Premium @ 3p |
£47.69 |
|
Year 1 Income and Savings |
£1,583.15 |
|
Year 5 Income and Savings - cumulative * |
£8,341.25 |
|
Year 10 Income and Savings - cumulative * |
£17,846.47 |
|
Year 25 Income and Savings - cumulative * |
£55,352.33 |
|
Pay Back time for this project |
10.4 years |
* The feed in tariff is guaranteed for 25 years and is index linked and therefore rises each year. We have taken a 3% inflation figure for this illustration.
