Suntech vs Tongwei - solar panel manufacturer comparison
Suntech has the broader catalog (255 vs 122 models). Suntech leads on peak efficiency at 24.80%. 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
- 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: TOPCon (71%)
Dominant cell tech: TOPCon (47%)
The flagships
Written summary
Suntech is a Chinese solar manufacturer founded in 2001 in Wuxi that went bankrupt in 2013, was acquired by Shunfeng International Clean Energy in 2014, and more recently came under the management of Xiamen C&D Group from late 2024 before that group exited the role in mid-2025 in favor of Hongyuan Green Energy stepping into the pre-restructuring process. Despite this ownership turbulence, the brand still holds Bloomberg New Energy Finance Tier 1 bankability status, though its production footprint is far smaller than that of the leading Chinese giants. Tongwei, by contrast, was founded in 1982 in Chengdu originally as a feed and aquaculture business before pivoting into solar in the early 2000s, and it has since become the first PV manufacturer ever listed on the Fortune Global 500, with 2025 capacity figures around 95 GW of cells and 63 GW of modules per year. On institutional footprint and manufacturing scale, Tongwei is clearly the stronger of the two.
Suntech's lineup leans toward rooftop residential and commercial installations, with N-type TOPCon products such as the Ultra V Pro Mini series delivering 420-460 W and efficiencies around 22.5-23.2 percent, built with reinforced wind and snow load ratings suited to varied climates. Tongwei covers a broader technology base spanning PERC, TOPCon and HJT, including a mass-production heterojunction efficiency record above 26 percent, and it serves everything from residential rooftops to commercial and industrial sites and utility-scale ground-mount farms through product families like the high-power G12R series reaching 625 W.
For a typical international buyer, both brands clear the Tier 1 bankability bar, making them broadly interchangeable on paper, but Tongwei's larger scale, wider technology portfolio and steadier corporate structure make it the safer default for utility-scale or long-horizon projects, while Suntech remains a credible choice for smaller rooftop jobs provided the buyer is comfortable with its history of ownership changes.
Generated by Claude Sonnet 5 · 2026-08-25
Other brand comparisons
Shop prices: See 32 Suntech offers · See 73 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.