Solar Panel Repair in Toronto

Licensed Toronto electrical contractors serving homes and businesses since 1991, with solar repair, maintenance, and electrical coordination handled as one connected system.

Solar Services Built Around the Property

A solar project rarely exists on its own. A homeowner may also be planning an EV charger or battery. A commercial property may already have tenant metering, larger electrical loads, or work being coordinated with other contractors.

That is why we look at what the solar system is connecting to, not just what is has to be repaired.

At Langstaff & Sloan, we work as electrical contractors in Toronto and across Ontario, supporting businesses, property managers, and homeowners with safe, reliable, and code-compliant electrical systems. Whether you need a high-voltage upgrade, a full system repair, or emergency troubleshooting, our work is shaped by the real conditions and requirements of your property.

Residential

Residential Solar Panel Repair
Ground-Mounted Solar Panels
Solar Panel Repair & Maintenance
Solar + Battery Storage
Solar Panel Cost Assessments

Commercial

Commercial Solar Repair
Solar System Design & Build
Commercial Solar Repair & Troubleshooting
Sub-Metering Integration

Solar Panel Repair Starts With the Cause

When solar production drops, replacing a panel is not always the answer. The fault may be at the module, but it may also be an inverter issue, damaged wiring, a poor connection, monitoring equipment, or another part of the electrical system. We would rather establish what has failed before recommending what needs to be replaced.

Our solar panel repair and maintenance work can include:

Troubleshooting reduced or inconsistent output
Inverter faults and replacement
Damaged panel assessment and replacement
Wiring and connection repairs
Storm and weather-related damage
System checks following roof or building work
Panel cleaning where buildup is affecting performance

That troubleshooting background is important to us. We already spend a significant part of our electrical work finding faults in systems we did not originally install. We repair them, by visting coming into an existing property, understanding what is there, and working backward from the problem.

Before We Repair Panels, We Check What They Connect To

Before a residential solar panel repair, we look at whether the property’s existing electrical system is operating properly and identify any issues affecting system performance.
That matters in Toronto homes that may have older wiring, previous renovations, service limitations, or other significant electrical loads. Our experience with rewiring and service upgrades helps us diagnose those issues and determine the right repair approach.
If you are experiencing issues with solar panels alongside a battery or EV charger installation, we can consider those systems together. On commercial properties, the same approach extends to distribution, tenant loads, sub-metering, and other building systems.

What Does Solar Panel Reapir Cost in Toronto?

Solar panel repair cost depends on more than the issue with the panels.
The final cost of repairing a solar system can change with:

Type and extent of system damage
Panel condition and repair requirements
Roof access and mounting issues
Roof or structural repairs
Electrical troubleshooting or service upgrades
Battery storage or connected system issues
Engineering, permits, and utility requirements
Site access and repair complexity

A low repair estimate doesn’t necessarily mean two solar service proposals are comparable. One property may need only a minor solar panel repair, while another may require electrical troubleshooting, component replacement, structural repairs, or more extensive system coordination.

For a meaningful Toronto solar panel repair cost, we assess the property and determine the repair solution the system actually requires.

The Advantage Is Everything Behind the Solar Panels

Our experience does not begin at the solar array.

Since 1991, we have worked across the electrical systems that solar ultimately connects to: service capacity, distribution, rewiring, commercial construction, sub-metering, troubleshooting, and newer loads such as EV chargers.

That wider experience becomes valuable when the project touches something else. A homeowner may need a service upgrade before adding solar and vehicle charging. A property manager may need generation coordinated with commercial sub-metering. A contractor or architect may need the solar scope integrated with a larger electrical project.

Langstaff & Sloan is led by Rob Sloan, President and Master Electrician, a Certified Electrical Technician and Vice President of the Ontario Electrical League GTA West Chapter. We are also members of the Merit Open Shop Contractors Association.

For us, the question is not only whether solar fits the property. It is whether it fits the electrical system behind it.

How We Take a Solar Project From Site to Connection

We keep the electrical, repair, and approval requirements connected from the start.

Assess the System

Review panel condition, system performance, electrical connections, inverter status, and existing service.

Diagnose the System

Plan the panels, inverter, mounting, and battery storage where applicable.

Coordinate Repairs & Requirements

Coordinate required permits, ESA requirements, and utility-related repair requirements where applicable.

Repair the System

Complete the required solar repairs, component replacements, electrical corrections, and system adjustments.

Complete Testing and System Verification

Test system performance, verify repairs, and confirm proper operation.

Confirm Operation

Verify system performance and walk the owner through monitoring, repairs completed, and key components.

For grid-connected projects, ESA and utility requirements are considered early so they do not become a last-stage obstacle.

Solar Service Across Toronto and the GTA

We take on residential and commercial solar work in:

Toronto
Etobicoke
Scarborough
Mississauga
Oakville
Markham
Vaughan
Burlington
Other GTA and select Southern Ontario locations depending on the project

For a solar repair to an existing system, or a commercial project that has to coordinate with other building infrastructure, the first step is understanding what is already there.

Solar Panel Repair for Toronto Properties

Bring us the property details, existing solar system conditions, and any performance concerns. We will assess the system, identify the cause of issues, and determine the repairs or adjustments required to restore proper operation.

Langstaff & Sloan Inc. — licensed electrical contractors serving Toronto and the GTA since 1991.

Frequently Asked Questions

Can you repair solar panels installed by another company?

Yes. We can assess and repair existing solar systems even when another company completed the original installation. Our priority is identifying where the issue is occurring before recommending a repair or replacement. This may involve inspecting the panels, inverter, electrical connections, monitoring equipment, or other system components.

Do you handle net metering and utility interconnection paperwork?

We coordinate the applicable utility connection and inspection requirements as part of the project. The exact process depends on the local electricity distributor and system size. Toronto Hydro requires grid-connected generation projects to follow its distributed energy resource connection process, including ESA approval before final connection.

Roof-mounted or ground-mounted solar panels: which is right for my property?

It depends on usable space, orientation, shading, roof condition, structural considerations, electrical routing, and the system capacity required. Roof mounting makes use of existing building space, while ground-mounted solar panels may provide more flexibility where sufficient land is available. We assess the site before recommending either approach.

Do you repair commercial solar systems for multi-unit or office buildings?

Yes. Our commercial solar service includes system troubleshooting, repairs, performance assessments, and integration with existing electrical infrastructure. For multi-unit properties, repairs may also require consideration of building loads, common-area systems, sub-metering, utility coordination, and how the work affects an occupied property.