FAQ

How much does a solar PV system cost?
The installed cost of a PV system will depend upon the roof type, the size of the system, the type of module used and how the system is mounted. The price of solar PV has gone down dramatically however and we now offer quality domestic systems at very competitive prices. A 2 kilowatt system can cost as little as £3000.00 subject to survey.

How big a PV system do I need?
The size of solar system you need depends on several factors such as how much electricity or hot water or space heat you use, how much sunshine is available where you are, the size of your roof, and how much you’re willing to invest

Is solar power still a good investment?
Is solar power still a good investment? Yes! Solar is still a very good investment and is better than investing your money in some saving accounts or ISA’s. The price of solar panels keeps going down and the Feed in Tariff ( FiT) can provide an attractive source of income. If you are looking for an ethical place to put your money then solar PV will benefit you and the environment. With very good rates of return through the Governments Feed in tariff scheme.

What is the Feed In Tariff?
The Feed In Tariff (FIT) is the Government incentive scheme to encourage uptake of Micro-generation. In simple terms you earn revenue from the amount of electricity you generate and export to the grid. Electricity utility companies are obliged to buy renewable electricity at fixed above-market rates set by the Government. See our pages on the Feed in Tariff scheme for more information.

How much can I save by using a PV system?
A Solar PV system can generate up to 180 kilowatt-hours per square meter. A PV system rated at 1 kilowatt can produce up to 1800 kilowatt-hours a year. In conjunction with other installed low cost devices this could mean a saving of £130-£150 per installed kilowatt of solar PV. Factors such as region, household usage, annual sunshine and shading issues will affect these figures but Perrin Energy will always take this into consideration before making any estimates.

Can I use PV to power my home?
PV can be used to power almost all of your entire home’s electrical systems, including lights, cooling systems, and appliances. PV systems can be blended easily into both traditional and non-traditional homes. The most common practice is to mount modules onto a south-facing roof or wall, but with good system design East-West roofs can be used very efficiently.

Can I use PV to power my business?
PV systems can be used in virtually every conceivable structure for commercial buildings, PV can be used outdoors for security lighting as well as in structures that serve as car ports generating power and at the same time reducing utility bills through on-site power production, and generating revenue via the Feed in Tariff scheme.

 

How long does it take to install the average system?
The average domestic system is 4kWp and on a roof top will take one to two days to install.

What is an EPC?
An EPC is an energy performance certificate that assesses how energy efficient your home is. In order to qualify for a FIT you have to have an EPC rating of D or above.

If you do not have a current EPC we will commission one as part of the installation

How long do PV systems last?
A PV system that is well designed, installed and maintained can operate for much longer than 20 years. The PV module has no moving parts and can last more than 30 years. The best way to ensure and extend the life and effectiveness of your PV system is by having it properly installed and well maintained.

How do I know if I have enough sunlight for PV?
A PV system needs unobstructed access to the sunlight for most of the day. Climate is not really a concern because PV systems are relatively unaffected by severe weather. There is enough sunlight to make solar energy systems useful and effective almost anywhere in the world. Most homes have adequate roof space for a PV system, but systems can be placed on garage roofs even those that are flat or on ground mounted systems in gardens. Perrin Energy Limited will always give a true prediction of estimated output for your system.

Will I need to get planning permission?
Most domestic and small commercial properties will not need planning permission.

Some exceptions however are listed buildings and properties in a National Park, Area of Outstanding Natural Beauty or a conservation area. In all cases you should contact your local authority to seek clarification.

For all properties your local building control department needs to be informed, for systems under 50k we will do this through our competent persons scheme, for systems over 50kW and we will assist with the planning process although most roof top installations will be covered under permitted development

What does PV mean?
PV is short for photovoltaic, which comes from Greek: photo (meaning light) + voltaic), from the name of Alessandro Volta the Italian physicist, hence electricity (or energy) from Light.

Contact Perrin Energy for details ,advice and a free no obligation quotation.