Rising energy costs are a significant concern for many homeowners and businesses, making it crucial to maximise the value of solar investments.
As of 2025, more than 1.5 million UK homes already have solar panels, and it is likely that every one of those homeowners will be interested in learning how to maximise the efficiency of their solar panels to help generate the best return from their energy investment.
In this article, we’ll explore practical steps to enhance the efficiency of your solar panels so that you can achieve lasting benefits from your investment.
First, a bit about us.
At Apex Doma, our accredited team delivers customised solar panel and battery storage solutions that maintain efficiency and long-term performance. Our goal is to ensure every system operates at its full potential, helping clients cut energy costs and contribute to a more sustainable future.
Understanding Solar Panel Efficiency
Solar panel efficiency is the measure of how effectively panels convert sunlight into electricity. The higher the efficiency, the more energy you can generate from the same amount of sunlight.
Solar efficiency testing is conducted under standard conditions that evaluate performance in relation to light levels, temperature, and other environmental factors.
Additionally, efficiency is not determined by the panels alone.
Roof angle, shading, system design, and maintenance all affect how well a system performs. The quality of inverters, batteries, and monitoring technology also affects how much usable power is available.
Working with accredited solar installers helps ensure that each part of the setup is functioning at its best, reducing energy costs and delivering reliable performance over the long term.
Key Factors That Affect Efficiency
A number of factors can influence how well your solar panels perform on a daily basis. These include:
- Environmental factors – Sunlight hours, shading from trees or nearby buildings, and high temperatures can reduce efficiency. Panels tend to perform better in steady light with minimal obstruction.
- Panel type and age – Different panel types vary in performance, while older systems gradually lose efficiency over time. Selecting quality panels helps maintain stronger output.
- Inverter quality – The inverter converts the energy from your panels into usable electricity. A high-quality inverter supports consistent performance and maximises efficiency.
- Installation angle and orientation – Panels positioned at the right tilt and facing an optimal direction capture more sunlight throughout the year, leading to greater energy production and reduced costs.
To find out how your system could be improved, contact Apex Doma today for a free consultation.
Installation Tips for Maximum Output
The way your system is installed also has a major impact on performance.
A thorough roof assessment should always take place ahead of any installation, as this helps identify structural suitability and highlights potential shading issues so they can be addressed at the installation stage.
Once panels are in place, angle and orientation become critical. Positioning panels to capture the maximum amount of sunlight throughout the year supports stronger energy production.
Our engineer-led installers apply the expertise needed to set up systems for long-term efficiency. Their technical knowledge helps prevent common installation issues and provides peace of mind that your panels will continue to deliver reliable results for years to come.
Regular Maintenance & Cleaning
How often do you clean and maintain your solar panels?
Regular cleaning is important as even a light layer of dust can lower efficiency over time. Leaves and other debris also prevent sunlight from reaching the surface, reducing the amount of energy your system can generate.
Light cleaning with water is often enough, though in cases of heavy build-up, calling a professional is the safer option. Usually, panels should be checked in spring and autumn, with additional inspections after storms or prolonged dry periods. This helps to keep your system running efficiently throughout the year.
Monitoring & Smart Tech
Performance monitoring systems make it easier to track how efficiently your solar panels are working. These tools highlight changes in output and allow you to spot underperformance quickly.
Spotting these drops at an early stage means they can be resolved before they effect energy savings, keeping your system reliable over the long term.
Smart meters and connected energy management systems add another layer of control. They show when your panels are generating the most electricity and help you adjust usage to match peak production. Linking panels, batteries, and household devices through one system provides a clear overview of energy generation and consumption.
Want help in this area? Learn more about how Apex Doma integrates monitoring and smart technology through our solar installation services.
Integrating Battery Storage
Adding a battery to your solar setup allows surplus energy generated during the day to be stored and used later, such as in the evening or on cloudy days. This approach increases the practical value of your system, as the electricity you produce is available when it’s needed most.
Battery storage increases overall efficiency by reducing reliance on the grid and helping to lower energy bills, even though it doesn’t change the technical efficiency rating of your panels.
Want a battery of your own?
Apex Doma is a certified GivEnergy Installer and Powerwall Installer, offering tailored solutions for homeowners and businesses. When paired with your solar panels, a professionally installed battery turns stored energy into a dependable resource that supports consistent output and helps reduce bills.
When to Upgrade or Expand Your Panels
Solar panels are built to last, but efficiency naturally declines as systems age. After many years in service, the energy produced may no longer meet the needs of your household or business.
At this stage, it may be worth considering an upgrade. This could involve replacing older panels, installing a new inverter to improve energy conversion, or adding battery storage to make better use of the electricity generated.
Not sure if this applies to your property and system? Apex Doma acts as a trusted advisor, tailoring our solutions to suit each property and guiding you on when upgrades will add meaningful value.
Request a free quote today to explore your options.
Solar Panel Efficiency FAQs
What angle is best for solar panel efficiency in the UK?
In the UK, solar panels are most efficient at a tilt of around 30 to 40 degrees, ideally facing south to capture the maximum sunlight throughout the year.
Are solar panels still efficient in winter?
Yes! Solar panels remain efficient in winter, though shorter days and lower sun levels mean reduced energy generation compared to summer.
Do solar panels need a lot of maintenance?
No, solar panels require very little maintenance. They have no moving parts, so aside from occasional cleaning to remove debris and periodic professional checks, they typically continue to work efficiently for many years.
