Canadian Solar vs CSUN - solar panel manufacturer comparison
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).
Both catalogues are read from the manufacturers' own datasheets. A brand is not scored against the market here, only against the other brand on this page.
The two companies
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.
- Founded
- 2001
- Headquarters
- Kitchener, Canada
- Annual capacity
- 51 GW/year
- Employees
- 17,113
- Listed
- NASDAQ: CSIQ
- Tier 1 bankable
- Yes
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...
- Founded
- 2004
- Headquarters
- Nanjing, China
- Annual capacity
- 2-3 GW/year
- Employees
- 1000-5000
- Tier 1 bankable
- Yes
Catalogue against catalogue
An average over a catalogue describes the range a manufacturer publishes, not the module you would buy. A brand with two flagship panels and eighty older ones averages worse than one that has retired its back catalogue.
What each of them builds
Canadian Solar skews to higher efficiency: 13% of lineup is 23%+
Canadian Solar offers more 600W+ panels (24% of lineup)
Dominant cell tech: <strong>PERC</strong> (67%)
Dominant cell tech: <strong>PERC</strong> (94%)
The flagships
Written 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.
Generated by Claude Sonnet 5 · 2026-09-16
Other brand comparisons
Shop prices: See 40 Canadian Solar offers · See 1 CSUN offer
Comparisons are computed from manufacturer datasheets held in the ComparePV database and may not reflect a brand's complete current lineup. Nothing on this page is paid placement.