13 solar installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in London: Gladiator Roofing & Solar, CR Score 61/100; 4.6★ from 48 Google reviews; open 24/7.
Most-reviewed: Toews Power Inc, 25 Google reviews at 4.8★, the most of 13 ranked after Gladiator Roofing & Solar; ranked #10.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
13 London solar installers are ranked here by CR Score, from ten published factors. 1 is open 24/7, 3 open Saturdays and 1 open Sundays, based on posted hours. The median Google rating is 4.9★ across 13 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Gladiator Roofing & Solar | 61 | 4.6★ (48) | Norfolk County, 20 km away | 24/7 | Overall |
| 2 | FowlerSolar (Solar Panel Installers/Repairs) | 57 | 5.0★ (9) | Norfolk County, 24 km away | Sat | — |
| 3 | The Solar Store | 56 | 5.0★ (3) | London | — | — |
| 4 | SunTap Technologies Inc. | 55 | 4.8★ (5) | Norfolk County, 26 km away | — | — |
| 5 | Arcadian Projects Inc. | 53 | 4.4★ (21) | New Hamburg, 62 km away | — | — |
| 6 | Solcan | 53 | 4.7★ (12) | Norfolk County, 51 km away | — | — |
| 7 | JYR Energy | 52 | 4.9★ (13) | Norfolk County, 58 km away | — | — |
| 8 | Arntjen Solar NA Inc | 52 | 4.9★ (7) | Woodstock, 41 km away | — | — |
| 9 | Sciencetech Inc | Solar Simulator and Spectroscopy Instrumentation | 52 | 5.0★ (5) | London | — | — |
| 10 | Toews Power Inc | 50 | 4.8★ (25) | Huron East, 39 km away | — | Most reviews |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and review volume: 4.6★ from 48 Google reviews, the most in London.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Norfolk County, 24 km away
Ranked #2 because of its Google rating and trade focus: 5.0★ from 9 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in London
Ranked #3 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Solar energy system service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Norfolk County, 26 km away
Ranked #4 because of its Google rating and trade focus: 4.8★ from 5 Google reviews, listed on Google as “Solar energy company”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in New Hamburg, 62 km away
Ranked #5 because of its Google rating and trade focus: 4.4★ from 21 Google reviews, listed on Google as “Solar energy system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Norfolk County, 51 km away
Ranked #6 because of its Google rating and trade focus: 4.7★ from 12 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Norfolk County, 58 km away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 13 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Woodstock, 41 km away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 7 Google reviews, listed on Google as “Solar energy company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in London
Ranked #9 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Solar energy equipment supplier”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Huron East, 39 km away
Ranked #10 because of its Google rating and review volume: 4.8★ from 25 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Huron East, 42 km away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Solar energy system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Aylmer, 31 km away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Electrical installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Aylmer, 37 km away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Electrician”.
Based on 8 of 10 factors; credentials and recency not yet collected.
20 more solar installers within 64 km that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| 1st Choice Home Solutions | 4.6★ (160) | In London |
| Accell Roofing Inc | 4.8★ (61) | In London |
| Canadian Solar Solutions | In London | |
| Davinci Contractors Group Inc. | 4.6★ (57) | In London |
| DLS Electric (London) Inc. | 4.8★ (69) | In London |
| Elway Electric Ltd. | 4.9★ (119) | In London |
| German Energy Alternatives Inc. | In London | |
| German Solar Corporation | 3.0★ (2) | In London |
| HoverTEK Aerial Drone Inspections Ontario | In London | |
| Irradiance Inc. | In London | |
| Koala Insulation of London | 5.0★ (21) | In London |
| London Electric | 5.0★ (9) | In London |
| Murray Power and Generation Inc. | 1.0★ (1) | In London |
| Polar Energy Systems - Insulation Services | 4.2★ (15) | In London |
| SnX Solar Panels | In London | |
| Sol Source Power, LLC | 5.0★ (2) | 59 km |
| Somerton Electric | 4.9★ (219) | In London |
| Spark Power | 5.0★ (3) | In London |
| Studerus Electric Inc. | 4.7★ (61) | In London |
| Warehouse Guys | London's Best Choice for Hot Tubs, Kitchens & Pools | 4.6★ (249) | In London |
US national ranges converted to CAD, not adjusted for London. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Solar panel installation | CA$38,690 | CA$43,760 | CA$47,600 | Per system: about 12 kW at about $2.60 per watt, before incentives. US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026) | October 2026 |
We scored 13 London solar installers on ten factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed October 22, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In London data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |