As the colder months approach, many commercial solar panel owners wonder how the winter weather might affect the performance of their solar energy systems. While solar panels are designed to work year-round, winter brings unique challenges that can reduce their efficiency if not properly managed. However, with the right preparations, your solar panels can continue to perform at their best even during the chilly winter months.

Here’s a guide for commercial clients on winterising solar panels for optimal efficiency.

‍

1. Keep Panels Clear of Snow and Debris

One of the biggest challenges in winter is the accumulation of snow, leaves, or other debris on your solar panels. Snow and debris block sunlight from reaching the photovoltaic (PV) cells, reducing the amount of energy your system generates.

What You Can Do:

  • Monitor Snow Accumulation: If you experience heavy snowfall, it’s essential to remove any snow buildup on your panels. Use a soft broom or a snow rake designed for solar panels to gently clear off the snow without damaging the surface. Avoid using sharp objects or heavy equipment that could scratch or break the glass.
  • Install a Snow Guard or Panel Tilt: For installations on flat roofs, consider adding a snow guard or increasing the tilt of your panels. A slight tilt helps snow slide off naturally, reducing the need for manual clearing.
  • Professional Cleaning: If your panels are in hard-to-reach areas or covered by heavy, wet snow, consider hiring a professional cleaning service to ensure safety and effective removal.

‍

2. Ensure Proper Panel Angle and Orientation

Winter brings shorter days and lower sun angles, which can impact the amount of sunlight your solar panels capture. Optimising the angle and orientation of your panels can help mitigate this.

What You Can Do:

  • Adjust the Tilt Angle: Some solar panel systems allow for adjustable tilts, which can maximise sunlight exposure during the winter months. In general, a steeper angle is beneficial for winter months, as it helps capture more of the lower-angle sunlight and encourages snow to slide off.
  • Reevaluate Orientation: Ensure that your panels are oriented to capture the maximum amount of sunlight. For commercial rooftops, it may be worth consulting a solar expert to determine if adjustments can be made to enhance winter performance.

3. Regularly Inspect the System

Winter weather can cause wear and tear on your solar system, especially due to the increased risk of ice, snow, and extreme temperatures. Regular inspections are crucial for identifying potential issues before they lead to costly repairs.

What You Can Do:

  • Visual Inspections: Inspect your panels for any visible damage, such as cracks or loose connections. Check for any signs of ice formation or water pooling around the system, as this could lead to potential issues like freezing or corrosion.
  • Check the Wiring and Inverters: Cold temperatures can sometimes affect the wiring and inverters of your solar system. Ensure that all components are functioning correctly, and that cables are protected from harsh weather conditions.

4. Maximise Energy Efficiency Across Your Facility

Winter typically brings colder temperatures, which means your business may use more energy for heating and lighting. To ensure that your solar system continues to meet your energy needs during the winter months, maximise energy efficiency throughout your facility.

What You Can Do:

  • Upgrade Insulation: Ensure that your building is properly insulated to reduce the need for heating. The less energy you use for heating, the more your solar system can offset your total energy consumption.
  • Energy-Efficient Lighting: Consider switching to energy-efficient LED lighting throughout your facility to reduce energy demand.
  • Monitor Energy Use: Use energy management software to monitor and adjust your energy usage patterns. This will help you optimise your energy consumption and ensure that your solar system is providing as much support as possible.

‍

5. Maintain Your Solar Battery Storage System

For commercial clients using battery storage in conjunction with their solar panels, winter can impact battery performance due to colder temperatures. Batteries tend to perform less efficiently in colder weather, so it’s important to maintain and optimise them for winter.

What You Can Do:

  • Keep Batteries Warm: If possible, ensure that your solar batteries are kept in a warmer environment or invest in battery enclosures that help maintain optimal temperature levels. This can help preserve their efficiency and extend their lifespan.
  • Monitor Battery Health: Regularly check the charge cycles and health of your batteries to ensure they are working at their optimal capacity. Cold temperatures can cause batteries to discharge more quickly, so it’s essential to make sure they are fully charged when needed.

‍

6. Stay On Top of System Performance with Monitoring Tools

Many modern solar systems come equipped with performance monitoring tools that provide real-time data on energy production. During the winter months, use these tools to track your system's output and quickly identify any performance issues.

What You Can Do:

  • Check Performance Regularly: Ensure that your system is producing as expected by reviewing performance data. A noticeable drop in energy production may indicate a problem such as snow buildup, dirt, or damage to the system.
  • Alert Systems: Some monitoring tools can send you alerts if there is a significant reduction in energy production or if a fault occurs. This can help you address any issues quickly before they lead to a more significant problem.

‍

7. Consider a Professional Winterisation Check

If you're unsure about how to prepare your solar panels for winter or want to ensure everything is in top condition, it’s always a good idea to call in a professional for a winterisation check. A certified solar technician can assess your system and recommend any necessary adjustments to keep it running efficiently throughout the season.

What You Can Do:

  • Schedule an Inspection: Book a professional winterisation inspection to ensure that all components of your system are in top condition and ready to face the cold weather.
  • Maintenance Contracts: Many solar providers offer maintenance contracts that include seasonal checks and performance assessments. This can be a worthwhile investment to ensure that your system continues to deliver maximum value throughout the year.

While winter weather poses some unique challenges for commercial solar panel systems, with the right preparation and maintenance, you can ensure that your solar panels continue to perform at their best throughout the colder months. From keeping panels clear of snow to optimising your energy consumption, there are several strategies you can implement to protect your investment and maximise efficiency.

By taking the time to winterise your solar system, you can not only ensure optimal performance but also contribute to the long-term sustainability of your business, reducing energy costs and your carbon footprint year-round.

‍