One of the biggest misconceptions about solar is that it requires constant maintenance and frequent repairs. The reality is exactly the opposite. Solar systems are one of the most reliable home improvement investments available today. Once installed, most homeowners rarely think about them. The system quietly produces electricity every day, reduces utility costs, and continues operating year after year with very little attention.
At Supreme Solar and Electric, we have installed and serviced thousands of solar systems throughout Fresno, Clovis, Palm Desert, and the surrounding areas. The vast majority of those systems continue operating without any major issues. In fact, most homeowners will go years without needing any service at all. That said, no electrical system is completely maintenance free. Over a 25 year system lifespan, there are a handful of repairs and service calls that can occur. Understanding these common issues can help homeowners know what to watch for and how to keep their systems operating efficiently.
Do Solar Panels Actually Need Repairs?
The first thing homeowners should understand is that solar panels themselves rarely fail. Modern solar panels are incredibly reliable. They have no moving parts, are designed to withstand rain, wind, heat, and hail, and typically carry production warranties of 25 years or more. Most service calls are not actually related to the solar panels.
Instead, they involve supporting equipment such as:
- Inverters
- Communication devices
- Electrical connections
- Batteries
- Monitoring systems
- Wiring
In other words, the electronics around the solar system are usually what require attention, not the panels themselves.
Communication and Monitoring Issues
One of the most common service calls we receive has nothing to do with power production. It is communication issues. Modern solar systems rely heavily on internet connectivity. Monitoring platforms allow homeowners and solar companies to track system performance, identify faults, and receive alerts when something needs attention. When communication is lost, the monitoring platform goes offline. The system may still be producing perfectly, but nobody can see what it is doing.
Common causes for service calls include:
- Changing internet providers
- Replacing WiFi equipment
- Updating passwords
- Router failures
- Signal strength issues
Because the system loses visibility, homeowners often assume something is wrong with the solar equipment when the real issue is simply a communication problem. This is probably the most common issue we see across all system types.
Service Calls for Inverter Failures
After communication issues, inverter failures are one of the most common repairs. The inverter is essentially the brain of the solar system. Its job is to convert the direct current electricity produced by solar panels into usable alternating current electricity for the home. Like any electronic device, inverters eventually wear out. Older inverter models were especially prone to issues because they often included built in display screens that sat directly in the sun for years. The combination of heat, UV exposure, and weather would eventually degrade components and shorten equipment life. Today, inverter technology is significantly better, but heat is still the enemy of electronics.
The Importance of Equipment Location
One of the best ways to extend inverter life is to install it in a shaded location.
Whenever possible, we try to place inverters:
- Inside garages
- Under covered patios
- Under roof eaves
- On north facing walls
- In shaded areas
When an inverter must be installed in direct sunlight, we often recommend adding a simple shade structure or protective canopy. These shade structures are inexpensive and can significantly reduce operating temperatures. Lower temperatures generally lead to longer equipment life and improved reliability. The same recommendation applies to batteries and other electronic equipment.
Electrical Connection Issues
Solar systems contain hundreds of electrical connection points. While these connections are designed to last for decades, occasional issues can occur.
Common examples include:
- Loose wire connections
- Damaged connectors
- Corrosion
- Moisture intrusion
- Junction box issues
Over time, environmental conditions can affect electrical connections, especially if water finds its way into a connection point. If moisture reaches conductors or terminals, it can create resistance, heat, and eventually system faults. Fortunately, these issues are typically easy to diagnose and repair when caught early. This is one reason regular monitoring is so important.
Critter Damage
One issue that surprises many homeowners is critter damage. Birds, squirrels, rodents, and other animals love solar systems. The area underneath solar panels provides shade, protection, and an ideal nesting environment. Unfortunately, some animals also enjoy chewing on wiring.
Common critter related issues include:
- Wire damage
- Communication cable damage
- Nesting underneath panels
- Debris accumulation
- Blocked airflow
Pigeons are especially common throughout California. Once a nesting area is established, it can quickly become a long term problem. This is why many homeowners choose to install critter guard around the perimeter of the solar array. Critter Guard helps prevent animals from accessing the space underneath the panels and is one of the best preventative maintenance investments available.
Battery Related Service Calls
Battery systems have become increasingly popular under NEM 3.0 because they help homeowners store excess solar production rather than exporting it to the utility grid. Modern batteries are extremely reliable, but they are still sophisticated electronic systems.
Occasionally, batteries may require:
- Software updates
- Communication troubleshooting
- Configuration adjustments
- Warranty service
- Component replacement
Most battery manufacturers now allow remote diagnostics, which means many issues can be identified and resolved without requiring extensive onsite troubleshooting. Fortunately, major battery failures remain relatively uncommon.
Microinverter and Optimizer Failures
Microinverters and power optimizers have excellent reliability records, but they are still electronic devices. Occasionally, individual units can fail. The good news is that when a microinverter fails, it usually affects only one panel rather than the entire solar system. This makes troubleshooting much easier.
In many cases, the repair process involves identifying the failed device and replacing it under warranty. Interestingly, it is often the electrical connections associated with the device that fail before the panel itself. For example, MC4 connectors, wire leads, and communication connections These components are often inspected before replacing any major equipment.
Do Solar Panels Themselves Fail?
Yes, but it is relatively rare. When solar panels fail, it is usually due to manufacturing defects, physical damage, extreme environmental exposure, or electrical issues. Most modern panels are extremely durable and designed to operate for decades. In our experience, panel failures occur far less frequently than inverter failures or communication issues. That is why solar panel warranties often extend 25 years or longer. Manufacturers have confidence in the long term reliability of the product.
Roof Related Service Calls
Sometimes the solar system is not the issue at all. The roof underneath it needs attention.
As roofs age, homeowners may eventually decide to replace roofing materials, repair leaks, and upgrade the roof structure. In these situations, the solar system may need to be temporarily removed and reinstalled. This process is commonly referred to as a remove and reinstall.
The solar equipment is carefully removed, stored, and then reinstalled once roofing work is complete. This is not technically a solar repair, but it is one of the most common long term maintenance expenses homeowners should be aware of.
How Often Do Solar Systems Actually Need Repairs?
Most homeowners will experience very few issues throughout the life of their system. The vast majority of solar systems simply operate day after day without intervention. Many homeowners never require service beyond occasional monitoring support or software updates.
When repairs do occur, they are typically related to:
- Communication issues
- Inverter failures
- Electrical connections
- Critter damage
- Battery troubleshooting
Actual solar panel failures remain relatively uncommon.
Catch Solar Issues Before They Become Major
The easiest way to catch problems early is to pay attention to monitoring and equipment indicators. If you enjoy using apps, check your monitoring platform periodically, paying attention to energy production, consumption, battery performance, and system alerts. If you are not someone who likes using apps, simply glance at the equipment whenever you walk by it. Most equipment has indicator lights that provide a quick snapshot of system health. Whether the equipment is in the garage, on the side of the house, or near the electrical panel, a quick glance at the LEDs can often tell you if everything is operating normally. It takes only a few seconds and can help identify issues before they become larger problems.
Solar systems are often described as “set it and forget it” technology, and for the most part, that description is accurate. Once installed, most systems operate for years with very little maintenance. The most common repairs are not usually related to the solar panels themselves. Instead, they involve supporting equipment such as inverters, monitoring systems, electrical connections, batteries, and wiring. The good news is that modern solar equipment is more reliable than ever.
Solar Installation, Monitoring, and Repairs with Supreme Solar
Combined with proper installation, quality components, and routine monitoring, most homeowners can expect decades of dependable performance. For the vast majority of solar owners, the experience is simple: The system gets installed, it produces electricity every day, and it quietly saves money month after month with very little attention required.
Trust Supreme Solar with your solar system installation, cleaning, monitoring, and repairs, and get the most from solar energy in Fresno. Request a FREE quote today.