Solar Panel Efficiency

Solar Panels Efficiency: A UK Consumer’s Guide

Solar panels have recently become increasingly popular in the UK as a sustainable and cost-effective way to generate electricity for homes and businesses.

As more people choose to install solar panels, it is vital to understand the efficiency of these panels and how to choose the best solar panel installers for your needs:

What Is Solar Panel Efficiency?

Most solar panels come with an efficiency rating of 15-20%, meaning they can convert 15-20% of the sunlight they receive into usable electricity. However, some solar panels on the market have an efficiency rating of up to 22%, which can be a significant difference in the amount of energy generated.

This refers to the amount of energy a solar panel can convert from sunlight to electricity. The efficiency of solar panels can vary depending on the type and quality of the panel and the amount of sunlight it receives.

Choosing the Best Solar Panel Installers

When installing home solar panels, it is crucial to choose the best solar panel installers for your needs. There are quite a few factors to consider when choosing a solar panel installer, such as experience, qualifications, and certifications.

The first step in choosing a solar panel installer is researching the company. Look for reviews and testimonials from your previous clients and information about their experience and qualifications. 

It is also important to get multiple quotes from different solar panel installers to compare prices and services. Ensure that the quotes include all the costs associated with installing solar panels, such as equipment, labour, and any necessary permits or paperwork.

Factors That Affect Solar Panel Efficiency

Several factors can affect the efficiency of solar panels, some of which are outside of your control. However, understanding these factors can help you maximise the efficiency of your solar panels and get the most out of your investment.

  1. Location and Orientation

The location and orientation of your solar panels can significantly impact their efficiency. Solar panels are most efficient when they are installed on a roof facing south and receiving direct sunlight throughout the day. However, even if your roof faces east or west, you can still generate significant electricity.

  1. Temperature

Solar panels are most efficient when they are cool, which is why they are often installed on the roof where they can be exposed to air. If your solar panels become too hot, their efficiency can decrease, which is why choosing a solar panel installer that uses high-quality panels designed to withstand high temperatures is vital.

  1. Shading

Shading can also have a significant impact on the efficiency of solar panels. Even partial shading from trees or buildings can lessen the amount of sunlight that reaches your panels, lowering their efficiency. This is why choosing a solar panel installer that can design a system that minimises shading is essential.

  1. Maintenance

Finally, regular maintenance is essential to maximise the efficiency of your solar panels. This includes cleaning the panels to remove any dust or debris and checking for any damage or defects that may affect their efficiency.


Installing solar panels can be a cost-effective and sustainable way to generate electricity for your home or business. However, it is important to understand the efficiency of solar panels and how to choose the best solar panel installers for your needs. 

By considering all the factors that affect solar panel efficiency and choosing an experienced and certified solar panel installer, you can maximise the benefits of solar energy and reduce your carbon footprint.

EDC Renewables specialises in setting up solar energy systems, battery storage, and EV charging stations for residential properties throughout South Wales. With more than three decades of expertise in the home improvement industry, we have successfully installed windows, doors, conservatories, extensions, fascia, soffits, and guttering. 

In response to the ever-growing demand for renewable energy, we have now extended our knowledge and experience to include sustainable energy solutions. Contact our solar panel installers today to get a quote!

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