PV solar panels work by using the photovoltaic effect to convert sunlight into electricity.
The panels are made of solar cells, which are typically made of silicon, a semiconductor material.
When the sun shines onto a solar panel, the solar cells absorb the energy from the sunlight and create electrical charges that move in response to an internal electrical field in the cell. This causes electricity to flow from the panel to the grid or a battery.
This will very much depend on how much and when you use your electricity and how efficient your appliances are.
You can expect to generate excess electricity in the summer which can potentially offset the energy you use from the grid in the winter months.
A combination of energy efficient appliances and light bulbs along with some potential lifestyle changes can help to reduce your electricity bill by over two-thirds.
The solar panels themselves are designed to be self-cleaning. However, over a period of time their performance can be affected by a build-up of debris such as leaves, tree sap, and bird matter.
We would recommend that the panels should be cleaned on a yearly basis. This should be carried out by personnel who are suitably qualified to work at height, or with equipment which would enable the cleaning to be carried out from ground level.
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.
It would take an average household around 7 years to recoup the initial investment, however we have seen some systems with battery storage on track for payback times of less than 6 years.
Solar panels indeed work on cloudy days, although their efficiency is reduced compared to sunny days. They generate less electricity because they receive diffuse sunlight instead of direct sunlight. Here are some key points:
Cloudy Day Output:
On a cloudy day, solar panels typically produce 10-25% of their output on a clear day. So, while they won’t be as effective, they still contribute.
Edge of Cloud Effect:
During partially cloudy days, there’s something called the “edge of cloud” effect. When sunlight peeks out from behind a cloud, a combination of direct and reflective sunlight can temporarily boost energy production.
Most solar panels come with a warranty of 25 to 30 years. They can continue to produce electricity beyond this period but might operate at reduced efficiency.
This would also very much depend onthe servicing and maintenance of the solar panels too.
The size of the system depends on your energy consumption, location, available roof space and budget.
A site survey is carried out to determine the best options for you.