Top-Rated Solar Installers in Markham, ON
9 local companies ranked by 1,647 Google reviews. Free to compare, no sign-up.
Short answer: The top-rated solar installers in Markham are Constant Home Comfort (4.8★, 605 reviews), Imperial Energy (4.8★, 128 reviews), Haneco Energy (4.8★, 82 reviews).
Solar installers in Markham, ranked
- 4.8 (605 Google reviews)201 Don Park Rd Unit 2, Markham, ON L3R 1C2
- 4.8 (128 Google reviews)85 Royal Crest Ct #3, Markham, ON L3R 9X5
- Haneco EnergyAlso installs batteries4.8 (82 Google reviews)215 Shields Ct #3, Markham, ON L3R 8V2
- 5.0 (17 Google reviews)461 Esna Park Dr #18, Markham, ON L3R 1H8
- 4.7 (585 Google reviews)70 Shields Ct, Markham, ON L3R 9T5
- ElectrovoltageAlso installs batteries4.7 (31 Google reviews)118 Highland Park Blvd, Markham, ON L3T 1B7
- Signature Electric LtdAlso installs batteries4.6 (85 Google reviews)400 Esna Park Dr Unit 1, Markham, ON L3R 3K2
- New Dawn Energy SolutionsAlso installs batteries4.6 (67 Google reviews)7321 Victoria Park Ave #8, Markham, ON L3R 2Z8
- Terawatt SolarAlso installs batteries4.6 (47 Google reviews)7030 Woodbine Ave #500, Markham, ON L3R 6G2
Together these 9 companies average 4.7★ across 1,647 reviews. Constant Home Comfort has the most reviews (605).
Ranked by Google rating weighted by review count, collected September 2026. Rankings are not paid for. How we rank and how we make money.
Listed here? Get your top-rated badge for your website or print the Markham rebate sheet for your customers.
What a solar costs in Markham
Canada has no public solar price survey. Get 2 or 3 quotes for the same size system and compare price per watt with our solar quote checker.
That could cut your cost by up to $10,000 if you qualify. Most rebates have rules (income, your current heating, a registered contractor, approval before work starts).
Rebates: our verified program data, checked monthly. Always confirm the exact amount for your home.
Talk to a registered energy advisor first. Some rebates need an evaluation or heat load calculation before any work starts. See the top-rated registered energy advisors in Markham. Read when to call an energy advisor.
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How much sun does Markham get?
Markham averages about 3.9 peak sun hours a day, more than 37% of the 123 cities we track. As a rough guide, each kilowatt of panels here makes about 1,130 kWh a year (after typical system losses). A good installer will give you a roof-specific estimate that accounts for shading and roof angle.
Source: Open-Meteo historical solar radiation, 2020-2024. Production estimate assumes 80% system efficiency.
Before you hire a solar installer
- Ask for a production estimate for your roof (kWh per year) and how shading was measured.
- Ask which panels and inverter they use, and who backs the warranty if the company closes.
- Ask how your utility credits extra power you send to the grid, and whether a battery makes sense for you.
Questions about solar installers in Markham
Who is the best solar installer in Markham?
Based on Google reviews, the top-rated solar installers in Markham are Constant Home Comfort (4.8★, 605 reviews), Imperial Energy (4.8★, 128 reviews), Haneco Energy (4.8★, 82 reviews). We rank by a review-weighted score, so companies with many strong reviews rank above those with only a few.
How are the solar installers in Markham ranked?
We list 9 solar companies in Markham, ranked by Google rating weighted by review count. Together they have 1,647 Google reviews and average 4.7 stars, collected September 2026. Constant Home Comfort has the most reviews (605). No company pays to be listed or ranked.
How much does solar installation cost in Markham?
Canada has no public solar price survey, so we do not quote a typical price. Get two or three quotes for the same size system and compare the price per watt.
Are there rebates for solar panels in Markham?
Yes. Our verified program data shows solar rebates up to $5,000, battery rebates up to $5,000 open in Markham. Most rebates have rules, such as income, your current heating, a registered contractor, or approval before work starts, so check the rebate page before you sign.
How much power do solar panels make in Markham?
Markham averages about 3.9 peak sun hours a day, more than 37% of the 123 cities we track. As a rough guide, each kilowatt of panels here makes about 1,130 kWh a year (after typical system losses). A good installer will give you a roof-specific estimate that accounts for shading and roof angle.
What should I ask a solar installer before I hire?
Ask for a production estimate for your roof (kWh per year) and how shading was measured. Ask which panels and inverter they use, and who backs the warranty if the company closes. Ask how your utility credits extra power you send to the grid, and whether a battery makes sense for you.
Before you call anyone, check what solar rebates you can get in Markham. Many programs require approval or a registered contractor before work starts.
Planning more upgrades? See the top-rated heat pump installers, insulation installers, home battery installers, energy advisors in Markham.
How to read these results
- Open the profile.How a installer describes its own work tells you a lot. Look for jobs like yours.
- Read the Google reviews.Stars and counts come from Google Maps. Click through and read what past customers wrote, good and bad.
- Check for program badges.A green registered-contractor badge means the company is on the program's own list, which some rebates require.
- Compare three.Do not stop at the first good installer. Three quotes show you the real range in price, equipment and plan.
Not ready to talk to a contractor yet?
Short reads and quick quizzes. Learn the rules first, then call.
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Questions to ask99 Questions That Make a Heat Pump Installer Sweat (In a Good Way)
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