As winter arrives and daylight hours grow shorter, homeowners with solar panels often wonder how to maintain peak performance during the coldest months. December brings unique challenges—snow, ice, fallen leaves, and reduced sun exposure can all affect your system’s efficiency. Fortunately, a few simple steps can help keep your panels producing power safely and effectively.
Here’s what you need to know about winter solar maintenance, and when it’s time to call a professional for help.
Keep Panels Clear of Snow and Ice
One of the biggest obstacles to winter solar performance is snow accumulation. Even a thin layer of snow can block sunlight, reducing your panel output dramatically. If snow is light and fluffy, it may slide off on its own thanks to the panel’s tilt. However, when a heavier snowfall hits, you may need to help things along.
Use a soft brush or a panel-safe snow rake to gently remove snow from panels without scratching the surface. Avoid metal tools, which can easily damage the glass. Never pour hot water on the panels—sudden temperature changes can crack the glass and cause long-term damage. If snow or ice seems difficult to remove or is located on a steep or inaccessible roof, it’s safer to wait for natural melting or call one of our professionals for help.
Clear Away Leaves, Branches, and Debris
Even in December, debris buildup can occur. Windstorms often blow branches and leaves onto roofs, and these can create shaded spots that weaken energy production. Safely removing debris keeps sunlight flowing freely to every cell on the panel.
If your home is surrounded by trees, consider trimming branches before winter fully sets in. Proper tree maintenance not only reduces shading but also prevents heavy limbs from falling and damaging panel frames during icy weather.
Watch for Shading and Winter Sun Position
The sun’s lower angle in winter means shadows stretch farther than they do in summer. A tree or structure that didn’t cast shade in July may create a noticeable shadow in December. Monitoring sun patterns throughout the season helps you understand whether shading is affecting production.
If you notice a drop in your energy output that doesn’t seem weather-related, a solar technician can evaluate the system to determine if shading, debris, or equipment malfunction is the cause.
Monitor System Performance Regularly
Most modern solar systems include an app or online portal to track energy production. Checking your system data during winter helps you spot sudden drops that could indicate a problem—such as a failed panel, a loose connection, or an inverter issue.
Pay attention to patterns: shorter days naturally produce less power, but drastic declines usually mean something needs attention.
When to Call a Professional
While basic cleaning and visual inspection can be done by homeowners, certain issues require expert help. Contact a professional solar technician if you notice:
• Cracked or broken panel glass
• Exposed wiring or loose mounting hardware
• Significant snow or ice you cannot safely remove
• Unexplained decreases in power output
• Physical damage from storms, fallen branches, or animals
Professionals have the tools and expertise to diagnose issues without voiding warranties or risking injury. They can also perform routine winter maintenance to keep your system running efficiently.
Keeping Your Solar System Winter-Ready
With regular monitoring, safe cleaning practices, and timely professional support, your solar panels can continue generating clean, reliable power even in December. A little winter preparation goes a long way—helping protect your investment and ensuring your home stays energy-efficient all season long.
Our team of Home Performance Experts has served the I-5 corridor from Blaine to Marysville, Oak Harbor to Concrete, and the San Juan Islands since 1972 with a mission of Improving Lives™. We look forward to serving you too! Contact Barron Solar today for solar panel repairs or assistance with clearing them of snow or ice.