York Region Solar Installer

Solar Panel Installation in Markham, Ontario

Terawatt Solar installs residential and commercial solar systems for homeowners and businesses in Markham, our head office community in York Region. Our in-house design and installation team serves Unionville, Cornell, Cathedraltown and Berczy Village and the surrounding area.

Solar Installation in Markham

Markham is home to Terawatt Solar's own headquarters on Woodbine Avenue, which means Markham homeowners and businesses get the shortest response times for site visits, service calls and warranty follow-ups of any city we serve. We have completed residential and commercial installations across Unionville, Cornell, Cathedraltown, Berczy Village and the Markham industrial corridor along Highway 7.

Local Utility and Net Metering

Most properties in Markham are served by Alectra Utilities. Our team handles the interconnection application and net metering paperwork with your utility as part of every installation, so your system is approved to export surplus power back to the grid.

Why Markham Homeowners Choose Terawatt Solar

Working with a locally based, in-house installer means the team that designs your Markham system is the same team that installs it and handles any warranty service afterward. We size every proposal from your actual twelve-month usage, not a generic package, and walk you through available incentive programs before you commit.

Service Area
1-2 Days
Typical on-site response time for Markham customers, given our HQ location
Local Utility
Alectra Utilities
Net metering interconnection handled for you
Case Study

A Recent Installation, Markham

Terawatt Solar installation project in Markham, Ontario
System Size
9.8 kW
Est. Annual Savings
$1,520/yr
Install Time
2 Days
Warranty
25 Years

The Situation

A homeowner in Markham was paying well above the Ontario average for electricity and wanted to lock in predictable costs ahead of planned time-of-use rate changes.

Our Approach

Our design team reviewed twelve months of the homeowner's utility bills along with roof orientation and shading, then proposed a system sized to offset the bulk of their annual usage.

The Outcome

The system was installed by our in-house crew and passed Alectra Utilities's interconnection review without delay, and the homeowner now tracks production against the original estimate through their monitoring app.

FAQ

Common Questions

Do you install solar in all of Markham?
Yes, we serve Unionville, Cornell, Cathedraltown and Berczy Village and the surrounding Markham area.
How long does an installation take?
Most residential installs are completed in one to two days on site, with the full process from signed proposal to utility approval typically taking six to ten weeks.
Is a free quote really free?
Yes. Site assessments and proposals are free and come with no obligation to proceed.
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Get a Free Solar Quote in Markham

Our team will review your Markham property and provide a no-obligation proposal.

Get a Free Quote
Or call us directly at (877) 648-3323