---
title: "Canadian Solar vs Suntech - Brand Comparison | ComparePV"
description: "Compare Canadian Solar vs Suntech solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background."
source: "https://comparepv.com/canadian-solar-vs-suntech"
---

# Canadian Solar vs Suntech

Canadian Solar has the broader catalog (292 vs 255 models). Suntech leads on peak efficiency at 24.80%.


## The two companies


| Attribute | Canadian Solar | Suntech |
| --- | --- | --- |
| Country | Canada | China |
| Headquarters | Kitchener | Wuxi |
| Founded | 2001 | 2001 |
| Employees | 17,113 |  |
| Annual capacity | 51 GW/year |  |
| Tier 1 | yes | yes |
| Listed | NASDAQ: CSIQ |  |
| Website | [https://www.canadiansolar.com](https://www.canadiansolar.com) | [https://www.suntech-power.com](https://www.suntech-power.com) |

Canadian Solar Inc. is a global renewable energy company founded in 2001. Headquartered in Kitchener, Ontario, it manufactures solar PV modules and provides battery energy storage solutions. The company also develops utility-scale solar power and battery energy storage projects.


## Catalog & Power


| Measure | Canadian Solar | Suntech | Margin |
| --- | --- | --- | --- |
| Panel Models | 292 | 255 | +37 |
| Max Power | 730 W | 735 W | +5 W |
| Avg Power | 472 W | 505 W | +33 W |


## Efficiency


| Measure | Canadian Solar | Suntech | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.40% | 24.80% | +0.40 pp |
| Avg Efficiency | 20.66% | 21.76% | +1.10 pp |


## Reliability & Warranty


| Measure | Canadian Solar | Suntech | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.331%/°C | -0.316%/°C | +0.016 |
| Bifacial Share | 133 (46%) | 114 (45%) | +1 pp |
| Avg Warranty | 28.2 yrs | 28.4 yrs | +0.2 yr |


## Efficiency distribution

Suntech skews to higher efficiency: 19% of lineup is 23%+


| Efficiency band | Canadian Solar | Suntech |
| --- | --- | --- |
| \<20% | 128 (43.8%) | 11 (4.3%) |
| 20-21% | 36 (12.3%) | 61 (23.9%) |
| 21-22% | 41 (14.0%) | 64 (25.1%) |
| 22-23% | 50 (17.1%) | 70 (27.5%) |
| 23%+ | 37 (12.7%) | 49 (19.2%) |


## Power distribution

Canadian Solar offers more 600W+ panels (24% of lineup)


| Power band | Canadian Solar | Suntech |
| --- | --- | --- |
| \<400W | 104 (35.6%) | 32 (12.5%) |
| 400-499W | 72 (24.7%) | 104 (40.8%) |
| 500-599W | 45 (15.4%) | 69 (27.1%) |
| 600-699W | 64 (21.9%) | 42 (16.5%) |
| 700W+ | 7 (2.4%) | 8 (3.1%) |


## Cell technology

Dominant cell tech: **PERC** (67%)

Dominant cell tech: **TOPCon** (71%)


| Technology | Canadian Solar | Suntech |
| --- | --- | --- |
| PERC | 195 (66.8%) | 5 (2.0%) |
| TOPCon | 85 (29.1%) | 180 (70.6%) |
| HJT | 12 (4.1%) | 0 |
| Unknown | 0 | 65 (25.5%) |
| N-type | 0 | 5 (2.0%) |


## Top panels, Canadian Solar


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [CS7N-730TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-730tb-ag) | 730 | 23.5 | -0.290 | Monocrystalline |
| 2 | [CS7N-725TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-725tb-ag) | 725 | 23.3 | -0.290 | Monocrystalline |
| 3 | [CS7N-720TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-720tb-ag) | 720 | 23.2 | -0.290 | Monocrystalline |
| 4 | [CS7N-715TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-715tb-ag) | 715 | 23.0 | -0.290 | Monocrystalline |
| 5 | [CS7N-710TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-710tb-ag) | 710 | 22.9 | -0.290 | Monocrystalline |
| 6 | [CS7N-705TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-705tb-ag) | 705 | 22.7 | -0.290 | Monocrystalline |
| 7 | [CS7N-700TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-700tb-ag) | 700 | 22.5 | -0.290 | Monocrystalline |
| 8 | [CS7N-695TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-695tb-ag) | 695 | 22.4 | -0.290 | Monocrystalline |
| 9 | [CS7N-690TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-690tb-ag) | 690 | 22.2 | -0.290 | Monocrystalline |
| 10 | [CS7N-675MS](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-675ms) | 675 | 21.7 | -0.340 | Monocrystalline |


## Top panels, Suntech


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [STP735S-D66-Nsh+](https://comparepv.com/panel/suntech-stp735s-d66-nsh) | 735 | 23.7 | -0.280 | Monocrystalline |
| 2 | [STP730S-D66-Nsh+](https://comparepv.com/panel/suntech-stp730s-d66-nsh) | 730 | 23.5 | -0.280 | Monocrystalline |
| 3 | [STP725S-D66-Nsh+](https://comparepv.com/panel/suntech-stp725s-d66-nsh) | 725 | 23.3 | -0.280 | Monocrystalline |
| 4 | [STP720S-D66-Nsh+](https://comparepv.com/panel/suntech-stp720s-d66-nsh) | 720 | 23.2 | -0.280 | Monocrystalline |
| 5 | [STP715S-D66-Nsh+](https://comparepv.com/panel/suntech-stp715s-d66-nsh) | 715 | 23.0 | -0.280 | Monocrystalline |
| 6 | [STP710S-D66-Nsh+](https://comparepv.com/panel/suntech-stp710s-d66-nsh) | 710 | 22.9 | -0.290 | Monocrystalline |
| 7 | [STP705S-D66-Nsh+](https://comparepv.com/panel/suntech-stp705s-d66-nsh) | 705 | 22.7 | -0.290 | Monocrystalline |
| 8 | [STP700S-D66-Nsh+](https://comparepv.com/panel/suntech-stp700s-d66-nsh) | 700 | 22.5 | -0.290 | Monocrystalline |
| 9 | [STP675S-D66/Wmh](https://comparepv.com/panel/suntech-stp675s-d66-wmh) | 675 | 21.7 | -0.340 | Monocrystalline |
| 10 | [STP670S-D66/Wmh](https://comparepv.com/panel/suntech-stp670s-d66-wmh) | 670 | 21.6 | -0.340 | Monocrystalline |


## Summary

Canadian Solar was founded in 2001 and is headquartered in Guelph, Ontario, Canada, with the bulk of its manufacturing operations based in China. The company has been listed continuously on NASDAQ since 2006 and holds Tier 1 status confirmed by both BloombergNEF and S&P Global Commodity Insights, placing it among the most bankable solar module suppliers in the world. Its module production capacity exceeded 50 GW annually by end of 2025, making it one of the largest vertically integrated solar manufacturers globally. Suntech was also founded in 2001 and is headquartered in Wuxi, Jiangsu, China. Once a pioneer of the industry - reaching 1 GW annual production as early as 2008 - the company filed for bankruptcy in 2013 following a bond default and was subsequently acquired by Shunfeng International Clean Energy in 2014. The restructured Suntech retains Tier 1 status on BloombergNEF's list and reports cumulative historical shipments exceeding 55 GW, but its bankruptcy episode introduces an institutional uncertainty that Canadian Solar - with its unbroken public listing and sustained growth trajectory - does not carry. On overall institutional footprint, Canadian Solar holds the stronger position.

Canadian Solar's portfolio spans residential rooftop, commercial and industrial, and large utility-scale ground-mount applications. Its current generation centres on n-type TOPCon technology, headlined by a TOPCon 3.0 module achieving 24.8% cell conversion efficiency, alongside HJT-based modules under the HiHero series targeting premium and low-carbon segments. Bifacial configurations are available across product tiers. Suntech similarly focuses on n-type TOPCon through its Ultra V Pro series, covering output ranges from roughly 395 W to 720 W and reaching module efficiencies of up to around 23.2%. Suntech positions itself as a cost-competitive Tier 1 option - typically priced below Canadian Solar's comparable models - making it an appealing choice for price-sensitive residential buyers and mid-scale commercial developers.

For a typical buyer weighing bankability, product breadth, and long-term warranty confidence, Canadian Solar is generally the safer default. Its uninterrupted corporate history, stock-exchange listing, and manufacturing scale give lenders and project developers strong grounds to trust that warranties will be honoured. Suntech is a legitimate Tier 1 alternative and suits buyers where price sensitivity is high and the installing contractor provides supplementary warranty coverage. The two brands are not fully interchangeable on large, project-financed utility deals, but for residential and smaller commercial installations, Suntech's TOPCon panels deliver competitive performance at a lower upfront cost.

Written by claude-sonnet from the figures above.


## Other comparisons

- [Canadian Solar vs A.B. Energy](https://comparepv.com/canadian-solar-vs-a-b-energy)
- [AE Solar vs Suntech](https://comparepv.com/ae-solar-vs-suntech)
- [Canadian Solar vs AEET](https://comparepv.com/canadian-solar-vs-aeet)
- [AIKO vs Suntech](https://comparepv.com/aiko-vs-suntech)
- [Canadian Solar vs AKCOME](https://comparepv.com/canadian-solar-vs-akcome)
- [ARTsolar vs Suntech](https://comparepv.com/artsolar-vs-suntech)


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Source: https://comparepv.com/canadian-solar-vs-suntech

Not in this file, on the page: the distributions above drawn as charts.