The UK is well known for its unpredictable weather. With plenty of showers and the occasional winter snowfall, it’s easy to assume the worst: without sufficient daylight, how can solar panels function?
However, the belief that panels stop working in poor weather is a myth, one that may prevent homeowners from joining the solar takeover. It’s an unfortunate assumption that Project Solar is here to dispel!
Join us as we clarify how solar production works and what you can do to keep your panels performing at their best.
Do solar panels work in cloudy weather?
Solar panels’ reliability in unfavourable weather has been proven time and time again.
Modern solar panel tech can capture a wide spectrum of light, including diffuse sunlight. Solar panels use photons to generate electricity, and these particles can still reach the panels in overcast conditions.
Many countries with varying weather patterns, like the UK, still find solar power to be a dependable energy source. Another great example is Germany, a country known for its cloudy weather.
Despite an almost permanent overcast in the cool seasons, they have one of the largest installed solar capacities in the world at 61 gigawatts!
The UK is also on track to generate record levels of summer solar power in 2024, with solar power output climbing by a quarter from June to August compared to levels in 2023. All this despite a relatively cool summer!
Do solar panels work in winter?
One of the most common misconceptions is that solar power is only effective during the summer months.
In reality, solar panels generate electricity from sunlight, not heat, so they continue to function even when temperatures drop (you can learn more about this in our ‘Debunking solar myths’ blog!)
Unlike other technologies that may struggle in colder conditions, solar panels can convert sunlight into electricity more effectively when they are not exposed to excessive heat.
Their reliability is clear from the positive solar statistics of areas with colder climates, like the UK and Northern Europe (all of whom have been successfully using solar energy for years!)
Will solar panels work in the rain and snow?
On rainy days, panels can still generate electricity from the diffused sunlight that penetrates clouds and precipitation.
Rain could even save you time between maintenance checks by acting as a natural cleaner. Dust, dirt, and other debris can accumulate on the surface of solar panels over time, which light rainfall washes away.
The same can be said for snow: many worry that snow accumulation will block sunlight, but most solar panels are designed with a dark, reflective surface, which accelerates the melting process.
Another lesser-known advantage of adverse weather is a phenomenon called the ‘albedo effect’. Snow on the ground can reflect additional sunlight onto the panel and potentially offset the lower output caused by shorter daylight hours.
What optimises solar panel efficiency?
While it’s impossible to predict the weather, homeowners can take some steps to help their panels operate at maximum efficiency.
Regular maintenance
Keeping your solar panels clean is essential for optimal performance.
Dirt, bird droppings, and leaves can accumulate on the panels and block sunlight. Regularly cleaning the panels (particularly if you live in a dusty or seaside area) can prevent a decline in output.
How often you’ll need to clean will depend on local weather conditions, but it’s generally advisable to clean panels once or twice a year.
Quality installers
Enlisting the services of a certified installer will ensure that your panels are correctly oriented for maximum sunlight exposure. As the largest and most experienced installer of solar panels across the UK, Project Solar has already helped 45,000 homes and businesses.
With our help, you can be confident in your solar panel performance!
Professional advice
Expert advice is invaluable. That’s why the knowledgeable team at Project Solar can assess your energy needs and recommend the most efficient solar models. Our proactive approach to renewable tech means you get the most out of your solar system, now and in the future!
Join the solar takeover with Project Solar!
When you’re ready to make the switch, we’ll be waiting to guide you through the process. Project Solar offers tailored solar PV systems, integrated roof tiles and other personalised solutions for domestic and commercial purposes. If you’d like to learn more, contact us today.