Do Solar Panels Work in Winter or Cloudy Weather?
As more Australian households switch to solar power, many homeowners wonder: Do solar panels still work in winter or on cloudy days? The short answer is yes — solar panels do work in colder, cloudier conditions, though performance may vary slightly with the weather. Let’s explore how they operate and what you can expect throughout the year.
☁️ Solar in Cloudy and Overcast Conditions
Solar panels are most efficient in direct sunlight, but they don’t shut down when it’s cloudy. They can also use indirect (diffuse) sunlight, meaning they still generate electricity even on overcast days.
- On cloudy or rainy days, panels typically produce 10–30% of their peak output.
- Rain can actually help clean panels by washing away dirt and debris, which boosts performance afterward.
❄️ Solar Performance in Winter
Despite colder temperatures and shorter days, solar panels continue working well in winter. In fact, cooler weather can improve the efficiency of solar panels.
???? Key Winter Facts:
- Solar panels convert light, not heat, into electricity.
- Cold weather has no negative impact on performance — and can even improve it.
- Snow is rare in many parts of Australia, but when it does occur, it typically melts quickly and slides off the panels.
???? Winter vs. Summer Output in Victoria
In regions like Ballarat and across Victoria, you can expect:
- Summer (6.6kW system): 28–34 kWh/day
- Winter: 18–24 kWh/day
- Cloudy Days: 8–14 kWh/day
Even during the cloudiest, shortest days, solar still helps reduce your electricity bills — especially if you time your energy use to match solar generation.
???? Real-Life Example: Scott & Leanne, Ballarat VIC
Scott and Leanne live in a 100-year-old cottage and save around $1,500 per year on energy bills thanks to their 4.5kW solar system.
- Summer output: 23 kWh/day (17 kWh exported to the grid)
- Winter output: 9 kWh/day on average, peaking at 18 kWh on sunny winter days
- Their smart energy habits — like running appliances during daylight — maximise solar usage and savings
???? Should I Add a Battery for Winter?
Adding a solar battery can help you:
- Store excess energy generated during the day
- Use that stored energy at night or during peak rates
- Minimise drawing power from the grid
Victorian households using battery storage report up to $650 extra in annual savings. Batteries can also provide backup power during outages, especially useful during storm season.
???? Tips for Getting the Most from Solar in Winter
- Install panels on a north-facing roof to maximise winter sun exposure.
- Use a monitoring app to track when your system is producing the most energy — and shift your appliance usage accordingly.
- Consider a heat pump hot water system set to run during daylight hours to use free solar power.
- Regularly clean and maintain your panels to ensure optimal performance.
- Avoid shading, especially during the winter solstice when shadows are longest.
???? Planning Your Solar System? Here’s What to Do
- Discuss your energy habits with Ballarat Soalr Panels — including any future plans like switching to electric heating.
- Size your system properly — bigger isn’t always better if you can’t use or store the energy effectively.
???? Why Winter Bills May Still Rise (And How to Offset It)
You might notice a higher electricity bill in winter, even with solar panels. Here’s why:
- Increased usage for heating and lighting
- Shorter daylight hours reducing solar output
- Less solar energy exported = lower bill credits
Smart energy habits and possible battery storage help you balance usage across seasons.
✅ Final Word
Yes — solar panels absolutely work in winter and on cloudy days. While output may be reduced compared to peak summer conditions, you’ll still generate usable energy, reduce your reliance on the grid, and lower your power bills.
Whether you’re in Ballarat, Ararat, or anywhere across Victoria, winter doesn’t stop solar from working — and it’s still a smart investment all year round.
???? Ready to Harness Solar Year-Round?
We’re here to help you plan the right system for your home — tailored for local weather and your energy needs.
Contact us today for a free consultation and quote.