Solar PV

Solar panels also known as PhotoVoltaic (PV) panels generate electricity from daylight. PV works by changing photons of light into electrons using a silicone-based material. PV panels do not need direct sunlight for them to work. They only need daylight. The more daylight they are exposed to, the more electricity they produce.

PV panels are relatively straight forward to install and require very little maintenance. Their price has also dropped significantly in the last decade and are now a cost-effective renewable energy solution. A typical PV installation could save up to 69% off the homeowner’s energy bills depending on site specifics.

PV panels are relatively straight forward to install and require very little maintenance. Their price has also dropped significantly in the last decade and are now a cost-effective renewable energy solution. A typical PV installation could save up to 69% off the homeowner’s energy bills depending on site specifics.

How Solar Panels Work

Our diagram below showcases how Solar PV works:

For a typical 4KW domestic PV installation

*view references

A typical domestic solar installation of 4kW could, on average, produce 3,200 kWh a year. Most solar panel manufacturers provide a 20-year guarantee, showing that the industry has matured. This means a 4kW array could produce as much as 60,000 kWh within its lifetime.

Average installed
cost £7,200/€8280M 1

64,000kWh generation 2 in 20 years 2

Save 898kg of CO 2 /year 3 emissions 3

Equivalent of planting 90 pine trees 4

About Solar PV

In domestic settings it is more common for PV to be installed in roof-arrays rather than ground mounted solar installations. A roof-array installation sits on top or within the dwellings roof structure whilst ground mounted arrays are installed on freestanding structures on the ground. A good example of an in-roof PV array installation, where your tiles are removed and replaced by the solar panels can be seen in picture 1.

It is best to install a PV array in un-shaded areas. In the Northern Hemisphere PV arrays should be South Facing to optimise their yearly power output. Solar panels generate Direct Current (DC) electrical power and require an inverter to convert this into a usable form. The inverter will convert the DC power into Alternative Current (AC) power that can be used in the home or supply the mains grid in grid connected installations.

Easy To Access Resources

Access Additional Resources Below

Once complete with the correct information our calculators display: 

  • How much solar energy your site can generate a year
  • How much CO2 emissions you could be saving
  • The cost of the solar installation
  • The number of trees you would need to plant for achieving the same CO2 savings made by the solar system
Solar PV Energy Calculator (GBP)
Solar PV Energy Calculator (EUR)
Download PDF Leaflet

References:

1 Government Statistics

2 MCS Certified

3 Government Publications

4 Go Tree Quotes

 

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