FAQs
How do solar panels work?
A solar PV panel consists of many cells made from layers of semi-conducting material, most commonly silicon. When light shines on this material, a flow of electricity is created.
The cells don’t need direct sunlight to work and can even work on cloudy days. However, the stronger the sunshine, the more electricity generated.
Solar PV systems are made up of several panels, with each panel generating around 355W of energy in strong sunlight. Typical systems contain around 15 panels and generate direct current (DC) electricity. Because the electricity used for household appliances is alternating current (AC), an inverter is installed along with the system to convert DC electricity to AC. This electricity can be used throughout your home, or exported to the grid.
Do I need permission to have them installed?
Solar PV panels are considered ‘permitted developments’ and often don’t require planning permission. However, exceptions apply and it’s best to check with your local planning office for guidance. If you live in a listed building, conservation area or national park, additional restrictions may apply.
If you’re planning to install a solar PV system in your home, you must register it with your Distribution Network Operator (DNO). The DNO is the company responsible for bringing electricity to your home. Usually, your installer will register the device for you.
The UK Government has advice on how to register your new energy device in England, Scotland and Wales.
Do I have enough space?
Space is a key consideration. The average system size is around 4.2kWp and this will typically take up around 25m2 roof area.
An unshaded, South facing roof is ideal for maximum electrical output. East or West facing roofs could still be considered, but North facing roofs are not recommended. A system facing East or West will yield around 15-20% less energy than one facing directly South.
Shaded roofs
Any nearby buildings, trees or chimneys could shade your roof and have a negative impact on the performance of your system.
Finding an unshaded spot is best, however sometimes shading is unavoidable. Some solar PV systems can minimise the impact of shading using ‘optimisers’. If you don’t have shading, the use of optimisers is not necessary or beneficial, other than the increased monitoring opportunities they offer – they won’t generate more energy.
How long does the installation take?
Most domestic solar panel installations take no more than a day, with minimum disruption.
Typically, the scaffolding will be erected a couple of days before the solar PV installation team arrive. We will then mount the panels on the roof and install the inverter and batteries. Finally, we commission your new system.
How much does a solar panel system cost?
A typical residential solar panel system costs between £4,000 and £10,000 Costs vary based on system size, panel type, and additional components like batteries.
Are solar panels maintenance free?
Solar panels are nearly maintenance-free, typically requiring only occasional cleaning and periodic inspections to ensure optimal performance. They are designed to last 25 to 30 years with minimal upkeep.
Do they need to be in direct sunlight to work?
No, the panels can be on any facing roof and they don’t have to be in direct sunlight to work. The panels that we use are Tier 1 and are designed specifically for the UK climate.
