Canadian Solar vs Tongwei - solar panel manufacturer comparison
Canadian Solar has the broader catalog (292 vs 122 models). Canadian Solar leads on peak efficiency at 24.40%. Tongwei leans bifacial (69% 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
- Founded
- 2013
- Headquarters
- Chengdu, China
- Listed
- SSE: 600438
- 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
Tongwei skews to higher efficiency: 41% of lineup is 23%+
Tongwei offers more 600W+ panels (53% of lineup)
Dominant cell tech: <strong>PERC</strong> (67%)
Dominant cell tech: <strong>TOPCon</strong> (47%)
The flagships
Written summary
Canadian Solar was founded in 2001 and has been listed on NASDAQ since 2006; it is formally headquartered in Canada, though most of its manufacturing and engineering base sits in China. The company appears on BloombergNEF's Tier 1 list and was named to S&P Global Commodity Insights' inaugural Premier List of Tier 1 Cleantech Companies for 2025, with annual production capacity around 61 GW. Tongwei, founded in 1982 and headquartered in Chengdu, is the first PV manufacturer to be included in the Fortune Global 500, reflecting its financial scale; it also carries BNEF Tier 1 status and an A rating in the PV ModuleTech bankability rankings, with module capacity exceeding 90 GW and cell capacity above 150 GW as of 2025. On raw manufacturing scale and vertical integration, Tongwei currently holds the stronger institutional footprint, though Canadian Solar has a longer track record and brand recognition in Western markets.
Both companies now center their catalogs on N-type TOPCon cell technology. Canadian Solar additionally markets a heterojunction (HJT) line under the HiHero name, reaching efficiencies up to 24.8 percent with a notably low temperature coefficient, aimed mainly at commercial and utility-scale projects. Tongwei, sold internationally under the TW Solar brand, offers TOPCon modules across multiple formats, from smaller rooftop-oriented panels to large G12-based modules rated up to 770 W, used chiefly in utility-scale plants and C&I installations. For an international buyer this generally translates to Canadian Solar being positioned as a more established, premium-adjacent brand with a mature distribution and warranty network, while Tongwei competes aggressively on price and raw manufacturing capacity at comparable bankability.
For a typical buyer, whether a residential customer or a utility-scale developer, the two brands are largely interchangeable in terms of bankability and technological maturity; the practical choice usually comes down to local distributor availability, pricing, and warranty terms rather than a fundamental quality gap between the manufacturers.
Generated by Claude Sonnet 5 · 2026-08-06
Other brand comparisons
Shop prices: See 40 Canadian Solar offers · See 70 Tongwei offers
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.