Common Solar Panel Issues and How We Fix Them

Over time, even the best solar systems can experience performance issues. Whether it’s a drop in energy output or a sudden inverter fault, understanding the most common solar panel issues, and how to fix them, can save you time, money, and stress.

At MPV Solar, we diagnose and repair all types of solar system problems, ensuring your system operates efficiently and safely for years to come.

Your inverter is the “brain” of your solar system,  it converts DC energy from your panels into usable AC electricity for your home.
When it fails, your entire system can stop producing power.

Common inverter issues include:

• Error codes or flashing lights

• Low or zero energy output

• Overheating or unusual noise

How we fix it:
Our licensed technicians inspect the inverter, check for firmware issues, test connections, and confirm correct voltage levels. If needed, we can replace your inverter with a reliable model that’s compatible with your existing system,  often restoring full performance the same day.

Physical damage to panels can occur from hail, falling branches, or improper installation. Even small cracks can reduce output or allow water to penetrate, leading to corrosion.

Signs of damaged panels:

• Visible cracks or discolouration

• Drops in system efficiency

• Water marks or burn spots

How we fix it:
We perform a panel inspection and performance test, isolating affected modules and safely replacing damaged panels. Our team ensures the new panel matches your existing array’s voltage and efficiency to maintain consistent performance.

Faulty wiring is a common but often hidden issue in aging solar systems. Loose or corroded connections can interrupt current flow, cause arcing, or even pose fire risks.

Warning signs:

• System shutting down intermittently

• Reduced energy yield despite sunny days

• Burning smell or signs of heat near junction boxes

How we fix it:
We conduct a comprehensive electrical inspection, testing cables, isolators, and junction points. Any faulty or degraded wiring is replaced using high-quality, weather-resistant components that comply with current Australian standards.

All solar systems lose efficiency slowly over the years, but excessive drops may indicate hidden issues like dirt build-up, shading, or microcracks.

Our solution:
We use advanced testing tools to check each panel’s performance and identify underperforming areas. After cleaning, recalibrating, and replacing faulty parts, we’ll provide a system health report outlining your system’s new performance metrics.

• CEC-accredited electricians and installers

• No subcontractors

• Fast diagnosis and repair turnaround

• Servicing all brands, whether we installed your system or not

We’re a family-owned Sydney business, committed to restoring your solar system’s efficiency and protecting your investment.

If your system isn’t performing like it used to, don’t wait until your next bill surprises you.

Contact MPV Solar today for a professional inspection and same-day service across Sydney.