- Church-Wellesley
- Also solar battery storage
75/100 SolarPanelFinder Score
- Says it is licensed
- Says it has been going since 2018
6/6 details published6 of 6 details published
Best Solar Panel Installers in Toronto & the GTA
Last updated By The SolarPanelFinder Rooftop Desk
What it costs143 solar panel installers serve Toronto and the GTA, compiled August 2026.
3,240 Google reviews · median 4.6★ · typical installed residential solar, Ontario average $2.42–$3.50 per watt installed (CAD), per Solar Calculator Canada, Ontario Solar Calculator (2026)
- Markham
74/100 SolarPanelFinder Score
- Says it is licensed
- Says it has been going since 2016
5/6 details published5 of 6 details published
- Also solar battery storage
73/100 SolarPanelFinder Score
- Says it is insured
- Says it has been going since 2021
5/6 details published5 of 6 details published
- Oakville
72/100 SolarPanelFinder Score
- Says it has been going since 1998
- Says it is with the Electrical Safety Authority (ESA)
6/6 details published6 of 6 details published
- King West
70/100 SolarPanelFinder Score
- Says it has been going since 2005
6/6 details published6 of 6 details published
- Islington-City Centre West
69/100 SolarPanelFinder Score
- Says it is licensed
- Says it is insured
6/6 details published6 of 6 details published
- Newmarket
69/100 SolarPanelFinder Score
- Says it is licensed
- Says it is insured
5/6 details published5 of 6 details published
- Mississauga
- Also solar battery storage
68/100 SolarPanelFinder Score
- Says about 25 years going
- Says it is with the Electrical Safety Authority (ESA)
6/6 details published6 of 6 details published
- Mississauga
63/100 SolarPanelFinder Score
- Says about 15 years going
5/6 details published5 of 6 details published
- Vaughan
- Also solar battery storage
63/100 SolarPanelFinder Score
- Says it has been going since 2018
- Says it is with NABCEP
6/6 details published6 of 6 details published
- Richmond Hill
60/100 SolarPanelFinder Score
- Says it is licensed
- Says it is insured
6/6 details published6 of 6 details published
- Oshawa
- Also solar battery storage
60/100 SolarPanelFinder Score
- Says it is licensed
- Says it has been going since 2018
6/6 details published6 of 6 details published
143 solar panel installers cover Toronto and the GTA here, at a median 4.6★ across 3,240 Google reviews. Solar Calculator Canada, Ontario Solar Calculator (2026) puts installed residential solar, Ontario average at $2.42–$3.50 per watt installed (CAD). Order comes from one published score across reviews, what each company states on its own site, and how complete its record is. No company buys a position.
Every row names its source
Toronto pricing for solar panel installation
Solar Calculator Canada, Ontario Solar Calculator (2026) puts installed residential solar, Ontario average at $2.42–$3.50 per watt installed (CAD), and 5 kW system, before incentives at $12,000–$17,500 per system (CAD) (Green Building Canada, Solar Panels Cost in Canada (updated 14 Jan 2026)). Posted figures normally exclude HST. The two headline rows are below; the remaining 7 line items, each naming its own source, are on the cost guide.
| Item | Typical range | Unit | Source |
|---|---|---|---|
| Installed residential solar, Ontario average | $2.42–$3.50 | per watt installed (CAD) | Solar Calculator Canada, Ontario Solar Calculator (2026) |
| 5 kW system, before incentives | $12,000–$17,500 | per system (CAD) | Green Building Canada, Solar Panels Cost in Canada (updated 14 Jan 2026) |
Arithmetic, not opinion
How does SolarPanelFinder rank solar panel installers?
No position is for sale. 34% of rated solar panel installers clear 4.8★, so the gaps here are narrow, and the published score is what separates them. The formula, in full.
Calculators
Price the job before you call anyone
Each of these works out a number from figures you enter, and names every source it uses on screen.
Questions to ask your installer
- How old is the roof, and do you recommend redoing it before the array goes on?
- Which panels and inverters are you quoting, and how long is each separate warranty? What the equipment tiers cost
- Micro-inverters, optimisers or a string inverter for my shading, and why that one?
- Who files the building permit, the ESA notification and the utility connection application?
- What annual output does this design model, and what assumptions is that built on?
Frequently asked questions
Toronto and the GTA: what is solar panel installation running to?
- Solar Calculator Canada, Ontario Solar Calculator (2026) puts installed residential solar, Ontario average at $2.42–$3.50 per watt installed (CAD), and 5 kW system, before incentives at $12,000–$17,500 per system (CAD) (Green Building Canada, Solar Panels Cost in Canada (updated 14 Jan 2026)). Those figures normally exclude HST. Every line item and its source sits in the solar panel installation cost guide.
How do I choose a solar panel installer in the GTA?
- Get three itemized written quotes and read what differs between them, not just the total. SolarPanelFinder lists 143 solar panel installers at a median 4.6★, the middle company sitting on 16 reviews. Ask each one for proof of licence and insurance, plus recent local addresses you can call. SolarPanelFinder does not check licences or insurance.
Which permits apply to solar panel installation in Ontario?
- An ESA permit and inspection for the electrical work, usually a municipal building permit for a roof-mounted array, and an application to Toronto Hydro, Alectra or Elexicon to connect to the grid. Who files each one is set out on our Ontario incentives and approvals page. Ask before you sign.
Can a company pay for a higher spot on SolarPanelFinder?
- No. Order comes from one published score out of 100: a review-weighted Google rating, what each company states about itself on its own site, and how complete its record is. Money changes nothing. 34% of rated solar panel installers clear 4.8★, so the gaps are narrow. The formula is published on our methodology page.
Elsewhere on this site
What should you read next?
The other Greater Toronto Area categories on SolarPanelFinder, plus what this work costs.
More than solar panel installation? See the whole directory
This site does not take quote requests and passes nothing to anyone. Every profile shows the company's own phone number and website, so you contact whoever you want to, directly.