--- title: "Suntech vs Tongwei - Brand Comparison | ComparePV" description: "Compare Suntech vs Tongwei solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background." source: "https://comparepv.com/suntech-vs-tongwei" image: "https://comparepv.com/og/compare/manufacturers/suntech/tongwei.png" --- # Suntech vs Tongwei Suntech has the broader catalog (255 vs 122 models). Suntech leads on peak efficiency at 24.80%. Tongwei leans bifacial (69% of lineup). ## The two companies | Attribute | Suntech | Tongwei | | --- | --- | --- | | Country | China | China | | Headquarters | Wuxi | Chengdu | | Founded | 2001 | 2013 | | Employees | | | | Annual capacity | | | | Tier 1 | yes | yes | | Listed | | SSE: 600438 | | Website | [https://www.suntech-power.com](https://www.suntech-power.com) | [https://en.tongwei.com.cn](https://en.tongwei.com.cn) | ## Catalog & Power | Measure | Suntech | Tongwei | Margin | | --- | --- | --- | --- | | Panel Models | 255 | 122 | +133 | | Max Power | 735 W | 750 W | +15 W | | Avg Power | 505 W | 584 W | +78 W | ## Efficiency | Measure | Suntech | Tongwei | Margin | | --- | --- | --- | --- | | Max Efficiency | 24.80% | 24.20% | +0.60 pp | | Avg Efficiency | 21.76% | 22.59% | +0.83 pp | ## Reliability & Warranty | Measure | Suntech | Tongwei | Margin | | --- | --- | --- | --- | | Avg Temp Coefficient | -0.316%/°C | -0.284%/°C | +0.031 | | Bifacial Share | 114 (45%) | 84 (69%) | +24 pp | | Avg Warranty | 28.4 yrs | 29.5 yrs | +1.2 yr | ## Efficiency distribution Tongwei skews to higher efficiency: 41% of lineup is 23%+ | Efficiency band | Suntech | Tongwei | | --- | --- | --- | | \<20% | 11 (4.3%) | 2 (1.6%) | | 20-21% | 61 (23.9%) | 6 (4.9%) | | 21-22% | 64 (25.1%) | 14 (11.5%) | | 22-23% | 70 (27.5%) | 50 (41.0%) | | 23%+ | 49 (19.2%) | 50 (41.0%) | ## Power distribution Tongwei offers more 600W+ panels (53% of lineup) | Power band | Suntech | Tongwei | | --- | --- | --- | | \<400W | 32 (12.5%) | 0 | | 400-499W | 104 (40.8%) | 41 (33.6%) | | 500-599W | 69 (27.1%) | 16 (13.1%) | | 600-699W | 42 (16.5%) | 33 (27.0%) | | 700W+ | 8 (3.1%) | 32 (26.2%) | ## Cell technology Dominant cell tech: TOPCon (71%) Dominant cell tech: TOPCon (47%) | Technology | Suntech | Tongwei | | --- | --- | --- | | TOPCon | 180 (70.6%) | 57 (46.7%) | | Unknown | 65 (25.5%) | 6 (4.9%) | | PERC | 5 (2.0%) | 10 (8.2%) | | N-type | 5 (2.0%) | 44 (36.1%) | | HJT | 0 | 5 (4.1%) | ## 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 | ## Top panels, Tongwei | # | Model | Power | Efficiency | Temp. coefficient | Technology | | --- | --- | --- | --- | --- | --- | | 1 | [TWMNF-66HD750](https://comparepv.com/panel/tongwei-solar-twmnf-66hd750) | 750 | 24.1 | -0.280 | Monocrystalline | | 2 | [TWMNF-66HD745](https://comparepv.com/panel/tongwei-solar-twmnf-66hd745) | 745 | 24.0 | -0.280 | Monocrystalline | | 3 | [TWMNF-66HD740](https://comparepv.com/panel/tongwei-solar-twmnf-66hd740) | 740 | 23.8 | -0.280 | Monocrystalline | | 4 | [TWMHF-66HD740X](https://comparepv.com/panel/tw-solar-twmhf-66hd740x) | 740 | 23.8 | -0.240 | Monocrystalline | | 5 | [THC G12-66 Bifacial](https://comparepv.com/panel/tongwei-thc-g12-66-bifacial) | 740 | 23.8 | -0.280 | Monocrystalline | | 6 | [TWMNF-66HD735](https://comparepv.com/panel/tongwei-solar-twmnf-66hd735) | 735 | 23.7 | -0.280 | Monocrystalline | | 7 | [TWMHF-66HD735X](https://comparepv.com/panel/tw-solar-twmhf-66hd735x) | 735 | 23.7 | -0.240 | Monocrystalline | | 8 | [TWMHF-66HD730X](https://comparepv.com/panel/tw-solar-twmhf-66hd730x) | 730 | 23.5 | -0.240 | Monocrystalline | | 9 | [TWMNF-66HD730](https://comparepv.com/panel/tongwei-solar-twmnf-66hd730) | 730 | 23.5 | -0.280 | Monocrystalline | | 10 | [TWMNF-66HD725](https://comparepv.com/panel/tongwei-solar-twmnf-66hd725) | 725 | 23.3 | -0.280 | Monocrystalline | ## 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 420-460W 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 625W. 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. Written by claude-sonnet-5 from the figures above. ## Other comparisons - [Suntech vs A.B. Energy](https://comparepv.com/suntech-vs-a-b-energy) - [AE Solar vs Tongwei](https://comparepv.com/ae-solar-vs-tongwei) - [Suntech vs AEET](https://comparepv.com/suntech-vs-aeet) - [AIKO vs Tongwei](https://comparepv.com/aiko-vs-tongwei) - [Suntech vs AKCOME](https://comparepv.com/suntech-vs-akcome) - [ARTsolar vs Tongwei](https://comparepv.com/artsolar-vs-tongwei) --- Source: https://comparepv.com/suntech-vs-tongwei Not in this file, on the page: the distributions above drawn as charts.