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

# Canadian Solar vs CSUN

Canadian Solar has the broader catalog (292 vs 35 models). Canadian Solar leads on peak efficiency at 24.40%. Canadian Solar leans bifacial (46% of lineup).


## The two companies


| Attribute | Canadian Solar | CSUN |
| --- | --- | --- |
| Country | Canada | China |
| Headquarters | Kitchener | Nanjing |
| Founded | 2001 | 2004 |
| Employees | 17,113 | 1000-5000 |
| Annual capacity | 51 GW/year | 2-3 GW/year |
| Tier 1 | yes | yes |
| Listed | NASDAQ: CSIQ |  |
| Website | [https://www.canadiansolar.com](https://www.canadiansolar.com) | [https://www.csun-solar.com](https://www.csun-solar.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.

China Sunergy (CSUN) is a Chinese manufacturer of solar cells and photovoltaic modules headquartered in Nanjing, Jiangsu. The company produces high-efficiency mono- and multicrystalline solar cells and modules from production facilities in China and, historically, Turkey. It was formerly listed on NASDAQ and was...


## Catalog & Power


| Measure | Canadian Solar | CSUN | Margin |
| --- | --- | --- | --- |
| Panel Models | 292 | 35 | +257 |
| Max Power | 730 W | 670 W | +60 W |
| Avg Power | 472 W | 478 W | +6 W |


## Efficiency


| Measure | Canadian Solar | CSUN | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.40% | 21.60% | +2.80 pp |
| Avg Efficiency | 20.66% | 20.15% | +0.51 pp |


## Reliability & Warranty


| Measure | Canadian Solar | CSUN | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.331%/°C | -0.366%/°C | +0.035 |
| Bifacial Share | 133 (46%) | 0 (0%) | +46 pp |
| Avg Warranty | 28.2 yrs | 25.0 yrs | +3.2 yr |


## Efficiency distribution

Canadian Solar skews to higher efficiency: 13% of lineup is 23%+


| Efficiency band | Canadian Solar | CSUN |
| --- | --- | --- |
| \<20% | 128 (43.8%) | 11 (31.4%) |
| 20-21% | 36 (12.3%) | 13 (37.1%) |
| 21-22% | 41 (14.0%) | 11 (31.4%) |
| 22-23% | 50 (17.1%) | 0 |
| 23%+ | 37 (12.7%) | 0 |


## Power distribution

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


| Power band | Canadian Solar | CSUN |
| --- | --- | --- |
| \<400W | 104 (35.6%) | 15 (42.9%) |
| 400-499W | 72 (24.7%) | 5 (14.3%) |
| 500-599W | 45 (15.4%) | 8 (22.9%) |
| 600-699W | 64 (21.9%) | 7 (20.0%) |
| 700W+ | 7 (2.4%) | 0 |


## Cell technology

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

Dominant cell tech: **PERC** (94%)


| Technology | Canadian Solar | CSUN |
| --- | --- | --- |
| PERC | 195 (66.8%) | 33 (94.3%) |
| TOPCon | 85 (29.1%) | 2 (5.7%) |
| HJT | 12 (4.1%) | 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, CSUN


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [CSUN670-132M](https://comparepv.com/panel/csun-csun670-132m) | 670 | 21.6 | -0.350 | Monocrystalline |
| 2 | [CSUN665-132M](https://comparepv.com/panel/csun-csun665-132m) | 665 | 21.4 | -0.350 | Monocrystalline |
| 3 | [CSUN660-132M](https://comparepv.com/panel/csun-csun660-132m) | 660 | 21.2 | -0.350 | Monocrystalline |
| 4 | [CSUN655-132M](https://comparepv.com/panel/csun-csun655-132m) | 655 | 21.1 | -0.350 | Monocrystalline |
| 5 | [CSUN650-132M](https://comparepv.com/panel/csun-csun650-132m) | 650 | 20.9 | -0.350 | Monocrystalline |
| 6 | [CSUN645-132M](https://comparepv.com/panel/csun-csun645-132m) | 645 | 20.8 | -0.350 | Monocrystalline |
| 7 | [CSUN600-156M](https://comparepv.com/panel/csun-csun600-156m) | 600 | 21.4 | -0.360 | Monocrystalline |
| 8 | [CSUN595-156M](https://comparepv.com/panel/csun-csun595-156m) | 595 | 21.2 | -0.360 | Monocrystalline |
| 9 | [CSUN590-156M](https://comparepv.com/panel/csun-csun590-156m) | 590 | 21.1 | -0.360 | Monocrystalline |
| 10 | [CSUN585-156M](https://comparepv.com/panel/csun-csun585-156m) | 585 | 20.9 | -0.360 | Monocrystalline |


## Summary

Canadian Solar was founded in 2001 in Guelph, Ontario by Dr. Shawn Qu, has been listed on Nasdaq since 2006, and now operates in more than 20 countries with module manufacturing capacity exceeding roughly 50 GW per year, with plans to expand toward about 55-56 GW by the end of 2026. The company has consistently held Tier 1 status on BloombergNEF's bankability list, meaning projects using its panels can realistically access non-recourse bank financing. CSUN, formally China Sunergy, was founded in 2004 in Nanjing and was once Nasdaq-listed as well, but it was delisted in 2016 following financial difficulties, and as of 2025 it no longer appears on BloombergNEF's Tier 1 list, despite having held that status in the past. Institutionally, Canadian Solar sits in a clearly stronger and more stable position, backed by greater scale and consistent bankability recognition.

Canadian Solar's catalog spans multiple use-case-specific lines: the TOPHiKu and TOPBiHiKu series built on N-type TOPCon cells for residential, commercial, and utility-scale ground-mount projects, a premium HiHero line using HJT technology reaching efficiencies around 22.5 to 24.4 percent, and the more budget-oriented HiKu series based on PERC cells. CSUN's lineup is smaller and less segmented, with around eight residential module options including half-cell, full-cell, and bifacial designs, efficiencies generally above 20 percent, and a standard warranty structure of 12 years on product and 25 years on performance, though without confirmed independent durability testing.

For a typical buyer, whether a residential installer or a commercial project developer, Canadian Solar is the safer default choice thanks to its confirmed bankability, broader and more segmented product range, and larger manufacturing footprint, which generally translates into easier access to warranty support and project financing. CSUN can still be a reasonable option for cost-sensitive, smaller-scale installations, but it carries more risk given the manufacturer's weaker financial track record and its current absence from the Tier 1 list.

Written by claude-sonnet-5 from the figures above.


## Other comparisons

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


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

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