Solar PV


If you’re thinking about installing a Sunuser PV system, the chances are you’ve got some questions to ask us. Please find below some of the most frequently asked questions.

What is the Feed-In Tariff (FIT)?

The Feed-In Tariff (FIT) is a Government scheme to encourage households to invest in electricity generating technology. By installing a Sunuser PV system you will be eligible to get paid through the FIT for all the electricity your system generates, whether you use it or not. This money is tax-free, index linked and guaranteed to be paid by the Government for 20 years. You would also get paid for any surplus electricity exported back to the grid.

How do I register for the Feed-In-Tariff (FIT) payments?

Contact the ‘Microgeneration Department’ of your electricity supplier and ask them to send you their application form for the Solar Photovoltaic FIT. We will then help you complete this form and you’re ready to go!

What is an EPC and why do I need one?

An EPC is an Energy Performance Certificate which tells you the energy rating of a property i.e. how energy efficient a building is. To receive the highest FIT rate, your property must have achieved a rating of ‘D55’ or above. As part of our service, we arrange for an energy assessor to visit your property in order to produce an EPC. This Certificate is valid for 10 years.

Can I combine or convert a solar thermal system and a solar PV system?

No, they are two separate systems that cannot be combined or converted in any way. They work independently of one another – solar thermal systems generate hot water and solar PV systems generate electricity. Many Sunuser customers have both solar thermal and solar PV systems.

My property doesn't face south - will I still get good results from my PV system?

Yes, Sunuser PV systems will work efficiently and effectively on easterly and westerly, as well as southerly facing houses.

My roof is partly shaded. Will a PV system work?

If any of the PV array is shaded, the entire system performance would be reduced. We strive to design systems to ensure optimum performance and if we consider a roof unsuitable we would advise you accordingly. For example, trees may be trimmed or cut down, alternative roofs could be used or systems could be mounted on the ground.

Does the system require maintenance?

The glazed modules are essentially self-cleaning as rain will remove any dust or debris.

I live in a Conservation Area. Will I need to apply for Planning Permission to install a PV system?

The PV installation is usually classed as a ‘permitted development’. Only in certain conservation areas or if your property is Listed may Planning Permission be needed. Sunuser will check this for you and if necessary complete and submit the full Planning Application on your behalf.

Do PV systems still work in the winter?

Yes. Electricity will be generated even when there is no direct sunlight. For example, on 4th February our 3.78 kWp system at our Head Office generated 8.19kWh.

Will the installation damage my roof?

No. The PV modules are secured by our experienced installation engineers to rails fastened to brackets, which are attached to the underlying roof timbers. There are no structural alterations to the roof and the solar PV modules are easily removed. Only the highest quality MCS approved roof fixing systems are used and each PV modules weighs only 20kg spread over 1.64m².

What guarantees and technical support do Sunuser PV customers receive?

Each installation comes with a comprehensive 2 year guarantee. The inverter is guaranteed for 5 years and the solar PV modules have a 25 year performance warranty we know will be honoured. All Sunuser customers have access to our highly trained technical department via telephone or e-mail to ensure they are making the most of their system.

What happens if there’s a power cut?

Sunuser PV systems are all entirely grid connected; they do not run on batteries. If there is a power cut to your property, your PV system will automatically switch off. This is a safety measure to ensure the protection of anyone who may be working on the electricity circuit within your property.

Should I wait a few months to get my Sunuser PV system?

No! Act now, the Feed-In Tariff rate will be reduced every 3 months.

What is a kWh?

‘kWh’ stands for a kilowatt hour. This is the same as a ‘unit’ of energy on your electricity bill.