Top-Rated Solar Installers in Markham, ON

9 local companies ranked by 1,647 Google reviews. Free to compare, no sign-up.

Ratings collected September 2026 · Page updated September 30, 2026

9Companies
1,647Google reviews
4.7★Average rating
Sep 2026Data collected
Ranked by Google reviewsNever paid forFree to compare

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 9 listed

Sort by
  1. 1
    Constant Home ComfortTop pickMost reviewsAlso installs insulation
    4.8 (605 Google reviews)
    201 Don Park Rd Unit 2, Markham, ON L3R 1C2
    Call (888) 829-1875WebsiteGoogle reviewsProfileDirectionsEmail [email protected]
  2. 2
    Imperial EnergyTop pick
    4.8 (128 Google reviews)
    85 Royal Crest Ct #3, Markham, ON L3R 9X5
    Call (800) 925-7868WebsiteGoogle reviewsProfileDirections
  3. 3
    Haneco EnergyTop pickAlso installs batteries
    4.8 (82 Google reviews)
    215 Shields Ct #3, Markham, ON L3R 8V2
    Call (905) 604-8335WebsiteGoogle reviewsDirectionsEmail [email protected]
  4. 4
    BrightCore Electrical
    5.0 (17 Google reviews)
    461 Esna Park Dr #18, Markham, ON L3R 1H8
    Call (647) 368-8878WebsiteGoogle reviewsProfileDirectionsEmail [email protected]
  5. 5
    Eco Star Home Services Co.
    4.7 (585 Google reviews)
    70 Shields Ct, Markham, ON L3R 9T5
    Call (416) 321-8666WebsiteGoogle reviewsDirectionsEmail [email protected]
  6. 6
    ElectrovoltageAlso installs batteries
    4.7 (31 Google reviews)
    118 Highland Park Blvd, Markham, ON L3T 1B7
    Call (416) 828-6976WebsiteGoogle reviewsDirectionsEmail [email protected]
  7. 7
    Signature Electric LtdAlso installs batteries
    4.6 (85 Google reviews)
    400 Esna Park Dr Unit 1, Markham, ON L3R 3K2
    Call (416) 490-8093WebsiteGoogle reviewsProfileDirectionsEmail [email protected]
  8. 8
    New Dawn Energy SolutionsAlso installs batteries
    4.6 (67 Google reviews)
    7321 Victoria Park Ave #8, Markham, ON L3R 2Z8
    Call (416) 855-9377WebsiteGoogle reviewsProfileDirectionsEmail [email protected]
  9. 9
    Terawatt SolarAlso installs batteries
    4.6 (47 Google reviews)
    7030 Woodbine Ave #500, Markham, ON L3R 6G2
    Call (877) 648-3323WebsiteGoogle reviewsDirectionsEmail [email protected]

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 never paid for. How we rank and how we make money.

Listed here? Get your free top-rated badge for your website.

What a solar costs in Markham

Typical installed priceNo official survey

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.

Solar rebates open in Markhamup to $5,000
Battery rebates open in Markhamup to $10,000

That could cut your cost by up to $15,000 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.

Get free quotes from these solar installers

Pick up to 3 companies and tell them what you want done. We send your request straight to them. Free, no obligation.

Which companies should quote?
What do you want done?

We only share your details with the companies you pick, and never sell them. Privacy policy.

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

  1. Ask for a production estimate for your roof (kWh per year) and how shading was measured.
  2. Ask which panels and inverter they use, and who backs the warranty if the company closes.
  3. 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 in Markham.

See every rebate in Markham

Compare top-rated local installers, ranked by Google reviews, and see the rebates you can stack. Free for homeowners.

See Markham rebates →
From Sam

Get the monthly rebate update

Once a month: new and changing rebate programs across every province and state we cover, plus what's new in heat pumps, solar and batteries. Short, sourced, no marketing.

No spam, ever. Unsubscribe anytime.

See your rebates and top installers