Take a step towards self sufficiency by generating your own electricity with solar panels.

Solar Photovoltaics (Solar PV) now form a pivotal part of the government' drive to widen access to low carbon electricity generation. The UK currently produces 14.9% of its electricity from renewable sources. That will need to increase to around 30% by 2020 in order to meet the government's renewable energy target.

Light commercial photovoltaic arrayIn-roof installation of a schuco photovoltaic arrayInstallation of a on-roof photovoltaic array4kWp on-roof array with polycrystalline panels

How do solar (Photovoltaic) arrays work?

Solar panels comprise of silicone cells, framed in aluminum, which energise when exposed to daylight to produce a current of electricity. The process of converting light energy into power is called the 'photovoltiac' effect.

A typical array comprises of roof mounted panels/collectors, an inverter and a electrical meter ('Generation meter'). The roof mounted collectors energise when exposed to daylight producing a current of electricity (DC 'direct' current), the generated electricity is fed via cables ('Strings') to the inverter which converts the DC electricity into a simulated AC current (which then can be used to run appliances in the home). The inverter sends the generated electricity directly into your fuse board to be used throughout the property, any un-used electricity is the 'fed' back to the grid.

They work best on a southerly facing roof that is clear from any shading (i.e.. from adjacent buildings or trees).

What is the 'Feed-in-tariff'?

The Government's clean energy cash back scheme ('Feed-in-tariff) is in place to provide an incentive for solar PV installations and consists of two parts - a 'generation tariff' and a 'export tariff', both of which are guaranteed for a 20-year period and are indexed linked with inflation.

Generation Tariff

The generation meter installed on a P.V. array records all electricity produced by the system (recorded in kWh's of electricity). The government, via your energy supplier, pays the owner of the system for all generated electricity produced by the system regardless of whether it has been used within the property. The generation tariff is currently around 4p/kWh.

Export Tariff

Generated electricity which is not used within the property is 'exported' back to the electricity grid; currently set at around 5p/kWh, it is assumed that 50% of the generated electricity shall be exported. This payment is provided on top of the 'generation tariff'.

TOTAL ANNUAL SYSTEM BENEFIT = Generation Tariff Payment + Export Tariff Payment + Electricity Savings (By using your own generated electricity)

The system typically pays for itself between 8-12 years.

Typical System Sizes

No. of P.V. Panels                             8                16

Installed Costs (Inc. VAT.)           £3,600          £5,400

Annual F.I.T Payment                    £130             £260

Annual Electricity Savings            £135              £269

Benefit After 20 Years                   £5,300           £10,580

In order to qualify for the feed-in-tariff, only Microgeneration Certification Scheme accredited PV panels must be used - as well as the installers themselves having full MCS certification (all our installations meet the criteria). An additional requirement, is that you will need to produce an Energy Performance Certificate rating of 'D' or above to qualify for the full F.I.T rate (below this rating shall receive a low F.I.T. tariff).

At Griffiths we use a range of top quality PV panels connected to SMA inverters. Our engineers have received specialist installation training at Schüco's training centre in Milton Keynes.
Installations on existing buildings are usually on-roof i.e. over your existing roof finish. New buildings can either have on-roof or in-roof systems that are level with the roof finish.

What do Griffiths offer?

Griffiths offer a no obligation survey and quotation; which a surveyor shall visit a property to determine the feasibility of installing a system. Provide a bespoke system design depending on the property and occupancy requirements, a full clear quotation which estimates the systems benefit to the customer including the amount of government funding the system may attract.

What are the benefits of Solar PV Systems?

  • Lower electricity bills
  • Funding from the governments Feed-in-tariff scheme
  • Improvements to a home's energy efficiency rating
  • Value to the property when selling.
Polycrystalline photovoltaic panels.Solar array on Griffiths 'solar store'Local customer with a four kilowatt array