Solar Panel Maintenance Myths: What’s Fact and What’s Fiction?
Solar Panel Maintenance Myths: What’s Fact and What’s Fiction?
Best practices from California Solar Broker for keeping your solar system at peak performance
Switching to solar is a long-term investment in energy savings—but to get the most from your system, it helps to understand how maintenance actually works. Solar panels are incredibly durable and low-maintenance, but misconceptions about cleaning, upkeep, and performance still persist.
Here are six of the most common myths about solar maintenance—and what California Solar Broker wants you to know instead.
Myth 1: Solar panels are self-cleaning
Reality: While sun, rain, and wind help, regular cleaning still makes a difference.
It’s true that most normal debris—like dust, leaves, and pollen—washes away naturally with weather. Solar panels are built to take a beating from sun and rain, and they’ll keep working even with some buildup.
But over time, grime can accumulate and reduce energy production. That’s why we recommend professional cleaning about every 6 months, especially if you live in a dusty climate, near farmland, or anywhere with heavy pollen.
Myth 2: Solar panels don’t need regular maintenance
Reality: A little upkeep goes a long way in keeping your system efficient.
Rainwater helps, but it’s not a substitute for routine maintenance. Left unchecked, buildup like bird droppings, tree sap, and dust can block sunlight from reaching the PV cells—and in extreme cases, reduce output by up to 25%.
Solar panels don’t need daily attention, but scheduling cleanings 1–2 times per year helps ensure long-term performance and keeps your system warranty in good standing.
Myth 3: You can (and should) clean your panels yourself
Reality: It’s safer—and smarter—to leave it to the pros.
We get the DIY urge, but climbing on your roof with a hose or cleaning tools is risky and usually ineffective. Improper cleaning methods or harsh materials can cause micro-scratches or water damage.
Professional solar cleaners are trained to handle a wide variety of roof types. They use soft-bristle tools, deionized water, and safe techniques that remove grime without damaging equipment—or risking your safety.
Myth 4: Dirty panels won’t produce electricity at all
Reality: Solar still works when dirty—it just works less efficiently.
Your system won’t shut down due to dust or debris, but output will dip. Even a light film of pollen or a few leaves can reduce your solar yield.
Think of dirt like sunglasses for your panels. They still work, but less light gets through. Regular cleanings keep your panels as clear and efficient as the day they were installed.
Myth 5: Cleaning panels can damage them or make them less efficient
Reality: Proper cleaning actually improves performance—and won’t harm your system when done right.
Some homeowners worry that scrubbing or washing panels will scratch the glass or damage the cells. That can happen if you’re using abrasive tools, but professional cleaners use purified water and soft brushes to avoid harm.
At California Solar Broker, we recommend trusted local professionals who understand exactly how to clean solar systems safely and effectively.
Myth 6: You have to turn off your solar system to clean it
Reality: Professional cleaners know how to work safely while your system stays on.
Most cleaning services don’t require a system shutdown. Your panels are designed to operate safely under routine maintenance. Unless your system includes specialized inverters or battery wiring, there’s no need to power down for cleaning.
Still, it’s always smart to check your inverter’s manual or consult your installer if you’re unsure. Or better yet, hire a licensed cleaner and let them handle the logistics.
Final Thoughts
Solar is low-maintenance—but not no-maintenance.
At California Solar Broker, we believe good habits lead to great returns. Keeping your panels clean helps maintain system efficiency, supports long-term savings, and ensures your solar investment pays off year after year.
Need help scheduling a professional cleaning or want an inspection on your current system
Contact us today and we’ll connect you with trusted maintenance partners in your area.