Solar PV Installation

Solar PV Installation

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Is solar right for you? Here’s a quick guide on whether your home could be suitable for a solar panel installation…

GenFIT’s free desktop survey

Finding out whether your roof is suitable for a solar pv installation just got simpler with our free desktop survey.

We use Google Earth aerial and streetview images to quickly determine your roofs type, orientation and the amount of solar panels which will fit in your desired location.

Desktop assessments only take 20 minutes with a fixed price quote and performance estimate by email shortly after.


To get most benefit from a solar power system must have a roof which faces a southerly direction. In the UK, solar panels facing South will generate the most total energy across a year. East and West facing facing  are still very efficient.


Solar panel angle also has an effect on the amount of energy generated. The minimum angle for solar panels to self-clean is 10 degrees from horizontal. The further North your location the steeper panels can be mounted to achieve optimal output.


Shading has a huge effect on the performance of solar pv systems so should be avoided where possible. You will need to consider whether there are any chimneys, trees, buildings or other obstructions that could disrupt performance of your solar panels.

Micro-inverters allow solar panels to operate independently, mitigating the effects of shading on an array.

Solar PV Performance

Solar PV installers must be registered with the Microgeneration Certification Scheme (MCS) to enable you to claim the Feed In Tariff (FITs).

All MCS installers must use the industry standard MCS Solar PV calculation:

Estimated solar AC generation (kWh/yr) = System size (kWp) x kWh based on postcode location / orientation / pitch (Kk) x Shading Factor (SF)

Delivery of solar energy is seasonal, with systems generating circa 5 times more energy in July than in December.

On average an optimally positioned unshaded 4kW (16 panel) domestic PV system will generate approx. 3700 kWh/yr, which is equivalent to £890 income and savings in year 1.


Solar PV systems require minimal maintenance as there are no moving parts. Solar PV panels typically come with a 25 year performance warranty, and usually last significantly longer

Solar PV inverters, which convert solar DC to grid AC electricity may need to be replaced after 12-15 years.

Energy monitoring allows you to keep track of your solar panels performance over it’s lifetime.

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