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

# DAH Solar vs Suntech

DAH Solar has the broader catalog (363 vs 255 models). Suntech leads on peak efficiency at 24.80%. DAH Solar leans bifacial (87% of lineup).


## The two companies


| Attribute | DAH Solar | Suntech |
| --- | --- | --- |
| Country | China | China |
| Headquarters | Hefei | Wuxi |
| Founded | 2009 | 2001 |
| Employees | 2000+ |  |
| Annual capacity | 10 GW/year |  |
| Tier 1 | yes | yes |
| Listed |  |  |
| Website | null | [https://www.suntech-power.com](https://www.suntech-power.com) |

DAH Solar is an innovation-driven and technology-leading company specializing in PV product manufacturing. They focus on R&D, manufacturing, and sales of high-efficiency PV modules, integrated PV systems, and solar energy storage systems. DAH Solar is known for its patented Full-Screen PV Module and SolarUnit...


## Catalog & Power


| Measure | DAH Solar | Suntech | Margin |
| --- | --- | --- | --- |
| Panel Models | 363 | 255 | +108 |
| Max Power | 725 W | 735 W | +10 W |
| Avg Power | 520 W | 505 W | +15 W |


## Efficiency


| Measure | DAH Solar | Suntech | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 23.34% | 24.80% | +1.46 pp |
| Avg Efficiency | 22.10% | 21.76% | +0.35 pp |


## Reliability & Warranty


| Measure | DAH Solar | Suntech | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.299%/°C | -0.316%/°C | +0.017 |
| Bifacial Share | 316 (87%) | 114 (45%) | +42 pp |
| Avg Warranty | 29.4 yrs | 28.4 yrs | +1.0 yr |


## Efficiency distribution

Suntech skews to higher efficiency: 19% of lineup is 23%+


| Efficiency band | DAH Solar | Suntech |
| --- | --- | --- |
| \<20% | 10 (2.8%) | 11 (4.3%) |
| 20-21% | 22 (6.1%) | 61 (23.9%) |
| 21-22% | 86 (23.7%) | 64 (25.1%) |
| 22-23% | 217 (59.8%) | 70 (27.5%) |
| 23%+ | 28 (7.7%) | 49 (19.2%) |


## Power distribution

DAH Solar offers more 600W+ panels (22% of lineup)


| Power band | DAH Solar | Suntech |
| --- | --- | --- |
| \<400W | 8 (2.2%) | 32 (12.5%) |
| 400-499W | 161 (44.4%) | 104 (40.8%) |
| 500-599W | 113 (31.1%) | 69 (27.1%) |
| 600-699W | 71 (19.6%) | 42 (16.5%) |
| 700W+ | 10 (2.8%) | 8 (3.1%) |


## Cell technology

Dominant cell tech: **TOPCon** (88%)

Dominant cell tech: **TOPCon** (71%)


| Technology | DAH Solar | Suntech |
| --- | --- | --- |
| TOPCon | 319 (87.9%) | 180 (70.6%) |
| PERC | 44 (12.1%) | 5 (2.0%) |
| Unknown | 0 | 65 (25.5%) |
| N-type | 0 | 5 (2.0%) |


## Top panels, DAH Solar


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [DHN-66Y18/DG-725](https://comparepv.com/panel/dah-dhn-66y18-dg-725) | 725 | 23.3 | -0.290 | Monocrystalline |
| 2 | [DHN-66Y18/DG-720](https://comparepv.com/panel/dah-dhn-66y18-dg-720) | 720 | 23.2 | -0.290 | Monocrystalline |
| 3 | [DHN-66Y18/DG-715](https://comparepv.com/panel/dah-dhn-66y18-dg-715) | 715 | 23.0 | -0.290 | Monocrystalline |
| 4 | [DAS-DH132NC-715](https://comparepv.com/panel/dah-solar-das-dh132nc-715) | 715 | 23.0 | -0.280 | Monocrystalline |
| 5 | [DHN-66Y18/DG-710](https://comparepv.com/panel/dah-dhn-66y18-dg-710) | 710 | 22.9 | -0.290 | Monocrystalline |
| 6 | [DAS-DH132NC-710](https://comparepv.com/panel/dah-solar-das-dh132nc-710) | 710 | 22.9 | -0.280 | Monocrystalline |
| 7 | [DHN-66Y18/DG-705](https://comparepv.com/panel/dah-dhn-66y18-dg-705) | 705 | 22.7 | -0.290 | Monocrystalline |
| 8 | [DAS-DH132NC-705](https://comparepv.com/panel/dah-solar-das-dh132nc-705) | 705 | 22.7 | -0.280 | Monocrystalline |
| 9 | [DHN-66Y18/DG-700](https://comparepv.com/panel/dah-dhn-66y18-dg-700) | 700 | 22.5 | -0.290 | Monocrystalline |
| 10 | [DAS-DH132NC-700](https://comparepv.com/panel/dah-solar-das-dh132nc-700) | 700 | 22.5 | -0.280 | Monocrystalline |


## 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 |


## Summary

DAH Solar and Suntech are both Chinese Tier 1 solar module manufacturers - as recognized by BloombergNEF - but they differ meaningfully in company history, scale, and product portfolio structure. Suntech, founded in 2001, is the older and historically more prominent brand, having once been the world's largest solar panel producer before a financial restructuring in 2013 that led to new ownership and a refocused business. DAH Solar, established in 2009 and headquartered in Hefei, China, has grown rapidly in the subsequent years, reaching a declared production capacity of 10 GW and a workforce of over 2,000 employees. Both manufacturers have maintained their Tier 1 bankability status through 2025, making them viable options for project finance and institutional procurement globally.

On the technology side, both companies have committed to TOPCon cell architecture as their primary technology. Suntech applies TOPCon across its entire product range of 136 modules, while DAH Solar uses it in approximately 79.6% of its broader 363-module catalog. DAH Solar leads on peak and average efficiency, with a maximum of 23.34% versus 23.2% for Suntech, and an average of 22.1% compared to 22.0%. DAH Solar also holds a meaningful advantage in temperature coefficient at -0.299%/°C versus -0.308%/°C for Suntech - a practical benefit in hot-climate deployments. The most striking portfolio difference is in bifacial coverage: DAH Solar's lineup is 87.1% bifacial, making it well-suited for utility-scale ground-mount and large commercial C&I projects where albedo gains matter, while Suntech's bifacial share of 42.6% points to a portfolio still weighted toward monofacial applications and conventional residential rooftop installs. Average module power is comparable at roughly 520 Wp for DAH Solar and 516 Wp for Suntech, and warranty terms are similar at around 29 years for both.

For international buyers choosing between the two, the decision hinges largely on application type and brand preference. Suntech's longer market history may carry more weight with conservative lenders and procurement teams in established European markets, while DAH Solar's superior bifacial portfolio breadth and slightly better thermal performance make it a stronger technical pick for ground-mount and large-scale commercial projects. Both are credible Tier 1 options for residential and commercial rooftop installations, with no decisive advantage separating them in that segment.

Written by claude-sonnet from the figures above.


## Other comparisons

- [DAH Solar vs A.B. Energy](https://comparepv.com/dah-solar-vs-a-b-energy)
- [AE Solar vs Suntech](https://comparepv.com/ae-solar-vs-suntech)
- [DAH Solar vs AEET](https://comparepv.com/dah-solar-vs-aeet)
- [AIKO vs Suntech](https://comparepv.com/aiko-vs-suntech)
- [DAH Solar vs AKCOME](https://comparepv.com/dah-solar-vs-akcome)
- [ARTsolar vs Suntech](https://comparepv.com/artsolar-vs-suntech)


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Source: https://comparepv.com/dah-solar-vs-suntech

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