Myth #1: Solar Panels Don’t Work in Cloudy or Cold Weather (The Truth Will Surprise You)
You might think solar panels need blazing sunshine to work. Logical, right? But here’s a shocker—solar PV systems still generate power on cloudy days and can actually perform better in cold weather.
If you’ve been holding back on solar because you live in a cloudy or chilly climate, it’s time to rethink. Let’s break this myth apart.
How Solar Panels Still Generate Power on Cloudy Days
A gloomy sky doesn’t mean your solar PV system stops working. Solar panels rely on daylight, not direct sunlight. Even on overcast days, they absorb diffuse sunlight and convert it into electricity.
Think of it like getting sunburned on a cloudy day. The sun’s rays still reach your skin—just as they still reach solar panels.
Here’s proof:
- Germany, known for its grey skies, is a global leader in solar power. If solar panels didn’t work in cloudy weather, Germany wouldn’t have invested so heavily in them.
- The UK, not exactly famous for endless sunshine, has seen a massive rise in home solar installations. Even with frequent cloud cover, solar PV systems deliver significant energy savings.
- Studies show that modern solar panels can still produce around 10-25% of their normal output on a fully overcast day.
If you live in a place with mixed weather, your solar PV system will still contribute to lower energy bills. Plus, if you add battery storage for home, you can store excess solar energy on sunny days and use it when needed.
Why Cold Weather Can Actually Improve Solar Efficiency
Here’s a surprise—solar panels perform better in cooler temperatures.
Like most electronics, solar PV systems work more efficiently when they stay cool. High temperatures can reduce panel performance, while cold weather keeps them operating at peak efficiency.
Here’s why:
- Solar panels convert sunlight into electricity. But when they get too hot, their efficiency drops.
- In colder climates, panels generate the same amount of electricity with less energy loss due to heat.
- Research shows that solar panels operate more efficiently at temperatures below 25°C.
Ever noticed how your smartphone overheats and slows down in summer? Solar panels work the same way. They prefer crisp, cool air over scorching heat.
This is why some of the best-performing solar PV systems are found in places with cold, sunny winters—like Canada, Sweden, and Scotland.
If you live in the UK, this is great news. Your panels will work efficiently year-round, even in winter.
The Real Factors That Affect Solar Panel Performance
If clouds and cold weather aren’t the real problem, what actually affects solar efficiency?
Here’s what truly makes a difference:
- Panel Angle and Position – The right tilt and orientation help maximise energy capture. South-facing roofs usually get the best results in the UK.
- Shading from Trees or Buildings – A little shade can lower output. Trimming trees or using micro-inverters can help.
- Dirt and Debris – A layer of dust or leaves can block sunlight. Occasional cleaning ensures peak performance.
- Panel Quality – Not all solar panels are created equal. High-efficiency panels produce more power and last longer.
If you’re serious about reducing energy bills, focus on optimising these factors. It’s far more important than worrying about the weather.
Cloudy or cold? No problem. Your solar PV system will still generate electricity and cut your home energy costs.
**Myth #2: Solar and Battery Storage Aren’t Worth the Investment (Breaking Down the Numbers)**
**The Long-Term Savings of Solar PV and Battery Storage**
You’ve probably heard it before: “Solar panels and battery storage are too expensive to be worth it.” But if you’re looking at just the upfront cost, you’re missing the bigger picture.
A solar PV system paired with battery storage isn’t just about shaving a few pounds off your energy bill today—it’s about locking in lower energy costs for decades. Energy prices are only going one way: up. By generating your own electricity, you’re protecting yourself from unpredictable rate hikes.
The average UK household using solar and battery storage can slash their electricity bills by up to 70%. That’s because a battery allows you to store excess energy during peak sunlight hours and use it when the sun isn’t shining. Without a battery, any unused solar power is sent back to the grid, often for a fraction of what you pay to buy it back later. With storage, you consume more of your own power and avoid those inflated evening rates.
Think of it as a hedge against inflation. Instead of being at the mercy of energy companies, you take control. A well-installed solar PV system with battery storage can last 25+ years, meaning you’re locking in savings for the long haul.
**How Government Incentives and Tariffs Improve ROI**
If you think solar and battery storage are too expensive, you might not be factoring in the financial incentives available. The UK government offers schemes that make switching to solar far more affordable than many realise.
The Smart Export Guarantee (SEG) allows you to earn money for selling unused solar energy back to the grid. While rates vary depending on the energy supplier, some pay up to 15p per kWh, turning your roof into a mini power station that generates passive income.
Then there’s zero VAT on solar panels and battery storage until 2027. That’s a 20% saving right off the bat, making solar more affordable than ever.
In Scotland and Wales, interest-free loans are available for homeowners looking to install solar panels and battery storage. In England, various local grants and financing schemes can further reduce upfront costs.
When you combine these incentives with rising energy prices, the payback period for a solar PV system with battery storage can be as short as 5 to 7 years. After that, it’s pure savings.
**Why Energy Independence Is More Valuable Than Ever**
Every time energy prices spike, more homeowners realise the value of energy independence. A solar PV system with battery storage gives you control over your electricity supply, reducing reliance on the National Grid.
Rolling blackouts, unexpected outages, and grid failures are becoming more common as demand increases. With a battery storage system, you keep your essential appliances running when the grid goes down. No more worrying about your fridge full of food spoiling or being left in the dark during a power cut.
Then there’s the environmental impact. Generating and storing your own renewable energy slashes your carbon footprint. The average UK home switching to solar and battery storage can reduce CO2 emissions by one tonne per year. That’s the equivalent of planting 50 trees annually.
Relying on fossil fuel-generated electricity isn’t just costly—it’s unsustainable. By investing in a solar PV system with battery storage, you future-proof your home against rising costs, grid instability, and environmental concerns.
Learn how to make solar and battery storage work for your home.
**Myth #3: Solar Panels and Batteries Require Constant Maintenance (Set It and Forget It?)**
**How Modern Solar Panels Are Designed for Low Maintenance**
Solar panels are not like your car—they don’t need regular oil changes, tune-ups, or constant attention. Once installed, they sit quietly on your roof, converting sunlight into electricity with almost no effort on your part. The reason? No moving parts.
Most high-quality solar PV systems are built to last 25 to 30 years with minimal upkeep. The materials used—tempered glass, aluminium frames, and weather-resistant coatings—are designed to withstand the elements. Rain, wind, snow, and even hail rarely pose a problem.
Dirt and debris can reduce solar efficiency slightly, but in most areas, rain naturally cleans the panels. If you live in a particularly dusty environment, an occasional rinse with a hose (or a quick wipe with a soft cloth) is enough to keep them performing well.
Manufacturers test solar panels under extreme conditions before selling them. They are designed to handle temperature swings, high winds, and even heavy snowfall. Unless you’re in an area with extreme pollution or frequent sandstorms, you won’t need to clean them more than once or twice a year.
If something does go wrong, most solar PV systems come with robust warranties—typically 20 to 25 years for performance and 10 to 12 years for product defects. In other words, they are built to last longer than most home appliances with far fewer maintenance headaches.
**Simple Battery Storage Care for Maximum Lifespan**
A home battery storage system is one of the smartest upgrades for energy independence, but what about maintenance? Unlike the lead-acid batteries of the past, modern lithium-ion solar batteries require little to no upkeep.
The biggest factor in ensuring a long battery lifespan is proper installation. If your home energy storage system is set up correctly by professionals, it will automatically manage charging and discharging cycles to maximise efficiency. There’s no need for you to tinker with settings or perform manual maintenance.
However, there are a few simple steps to ensure your battery performs optimally for years:
- Keep it in a stable environment. Excessive heat or cold can shorten battery life. Most home battery storage systems are designed to be installed indoors or in a temperature-controlled area. If placed outside, they should be shielded from extreme weather.
- Monitor performance through the app. Nearly all modern solar battery systems come with an app or monitoring platform. This gives you real-time insights into how much energy is stored and used, allowing you to spot any unusual changes before they become problems.
- Keep software updated. Like a smartphone, solar batteries receive firmware updates that improve performance and efficiency. Most updates happen automatically, but occasional manual updates may be necessary.
With proper setup and minimal attention, a solar battery can last 10 to 15 years before needing replacement. Unlike old battery systems that required frequent water refills and equalisation charges, today’s lithium-ion batteries are nearly maintenance-free.
**When (and If) You Actually Need Professional Maintenance**
While solar panels and batteries require little maintenance, there are rare cases where professional servicing is needed. Here’s when to call in the experts:
- Significant drops in performance. If you notice a sudden decrease in solar production or battery storage capacity, it could indicate a wiring issue, panel damage, or a faulty inverter. Most issues can be diagnosed remotely through monitoring apps, but a technician can inspect the system if needed.
- Physical damage. While solar panels are built to withstand harsh weather, falling branches, heavy hail, or improper installation can sometimes cause cracks or loose connections. An inspection will determine if a repair or replacement is necessary.
- Inverter failure. The inverter is the brain of your solar PV system, converting direct current (DC) from the panels into usable alternating current (AC) for your home. Inverters typically last 10 to 15 years, so they may need replacement before the panels do.
For peace of mind, many homeowners opt for an annual or biannual professional check-up. However, this is more about reassurance than necessity. In most cases, your solar PV system and battery storage will run smoothly for years with little intervention.
Solar PV and battery storage are designed to be as hassle-free as possible. Once installed, they work silently in the background, cutting energy bills and reducing your carbon footprint with almost no effort.
Get expert advice on designing, installing, and maintaining your solar PV and battery storage system by visiting our website.