Is Your Solar System Still Under Warranty?

If your solar system isn’t performing like it used to,  or your inverter has suddenly stopped working,  the first question most Sydney homeowners ask is:

“Is my solar system still under warranty?”

The answer isn’t always simple. Solar warranties vary by component, installer, manufacturer, and even how the system has been maintained. Many homeowners assume they’re covered… only to find out too late that their warranty has expired or been voided.

This guide breaks down solar panel warranties, inverter warranties, what voids coverage, and what your options are if your original installer is no longer around,  all from a local Sydney solar service specialist.

A typical residential solar system has multiple warranties, each covering different components.

Most solar panels come with two separate warranties:

Product Warranty (10–25 years)
Covers manufacturing defects such as:

• Frame failure

• Delamination

• Faulty junction boxes

• Premature panel failure

Performance Warranty (25 years)
Guarantees that panels will still produce a certain percentage of their original output over time (usually ~80–85% after 25 years).

👉 Important: Performance warranties don’t cover installation issues, inverter faults, or wiring problems.

Solar inverters have much shorter warranties than panels, which is why inverter failures are one of the most common solar issues in Sydney.

Typical inverter warranties:

• String inverters: 5–10 years (extendable on some models)

• Premium inverters (e.g. Fronius): 10–12 years

• Microinverters: 10–25 years (brand dependent)

Inverters work the hardest and are exposed to heat, dust, and power surges, making them the most likely component to fail first.

This is where many homeowners get caught out.

Your solar warranty may be void or rejected if:

• The system wasn’t installed to Australian Standards

• Unlicensed or unauthorised repairs were carried out

• There’s no evidence of system maintenance

• Water ingress or corrosion wasn’t addressed early

• The inverter wasn’t installed with proper ventilation

• The system was modified without approval

In Sydney, heat, humidity, salt air, and storms are common contributors to warranty issues, especially in coastal and inner-city areas.

If you purchased a home with an existing solar system, warranties may still apply, but only if certain conditions are met.

Do Solar Warranties Transfer to New Owners?

• Panel manufacturer warranties: Usually transferable

• Inverter warranties: Often transferable, but registration matters

• Installer workmanship warranties: Often not transferable

What helps:

• Original installation date

• Inverter serial numbers

• Proof of purchase or commissioning documents

If paperwork is missing, a professional solar system inspection can help identify the system age, condition, and remaining coverage.

This is extremely common across Sydney.

If your original installer has closed, changed names, or stopped responding:

• Manufacturer warranties may still apply

• You’ll need a qualified solar service provider to assess and manage claims

• Some manufacturers require formal diagnostics before approving replacements

MPV Solar regularly assists homeowners with warranty assessments and inverter fault diagnostics, even for systems we didn’t install.

To determine your warranty status, you’ll need:

• System installation date

• Panel brand and model

• Inverter brand, model, and serial number

• Any service or maintenance history

If you’re unsure, a solar system health check can:

• Identify failing components

• Confirm inverter fault codes

• Check installation compliance

• Determine warranty eligibility

MPV Solar is a Sydney-based solar service specialist providing:

• Solar system inspections

• Inverter fault diagnostics

• Warranty condition assessments

• Manufacturer-approved repairs

• Inverter replacements and upgrades

We regularly service systems installed by other companies and help homeowners understand their real options, without voiding warranties or risking unsafe repairs.

Whether your system is under warranty or not, we focus on safe, compliant, long-term solutions.

If your warranty has ended, you’re not out of options.

Depending on the issue, MPV Solar can:

• Replace failing inverters with modern, efficient models

• Repair or reconfigure system wiring

• Upgrade systems to support battery storage

• Improve performance with system optimisation

In many cases, upgrading an inverter can increase efficiency, monitoring capability, and future battery compatibility.

If your solar system is underperforming, showing fault codes, or you’re unsure about your warranty status, don’t guess.

MPV Solar provides professional solar system inspections, inverter diagnostics, and honest advice for Sydney homeowners.

Book a solar system check today and get clarity before small issues turn into expensive failures.