---
title: "Q-Cells vs QSun Solar - Brand Comparison | ComparePV"
description: "Compare Q-Cells vs QSun Solar solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background."
source: "https://comparepv.com/q-cells-vs-qsun-solar"
---

# Q-Cells vs QSun Solar

Q-Cells has the broader catalog (89 vs 0 models). Q-Cells leans bifacial (39% of lineup).


## The two companies


| Attribute | Q-Cells | QSun Solar |
| --- | --- | --- |
| Country | South Korea |  |
| Headquarters | Seoul |  |
| Founded | 1999 |  |
| Employees | 2000+ |  |
| Annual capacity | 11.2 GW/year |  |
| Tier 1 | yes | no |
| Listed | NASDAQ: HQCL |  |
| Website | [https://www.qcells.com](https://www.qcells.com) |  |

Qcells is a renowned global provider of complete energy solutions, specializing in solar cells and modules, energy storage solutions, downstream project business, and energy retail. The company has a strong heritage dating back to its foundation in Germany and has become a leader in technology innovations. As an...


## Catalog & Power


| Measure | Q-Cells | QSun Solar | Margin |
| --- | --- | --- | --- |
| Panel Models | 89 | 0 | +89 |
| Max Power | 675 W | 0 W | +675 W |
| Avg Power | 468 W | 0 W | +468 W |


## Efficiency


| Measure | Q-Cells | QSun Solar | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 23.20% | - |  |
| Avg Efficiency | 21.21% | - |  |


## Reliability & Warranty


| Measure | Q-Cells | QSun Solar | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.325%/°C | - |  |
| Bifacial Share | 35 (39%) | 0 (0%) | +39 pp |
| Avg Warranty | 27.0 yrs | - |  |


## Efficiency distribution

Q-Cells skews to higher efficiency: 2% of lineup is 23%+


| Efficiency band | Q-Cells | QSun Solar |
| --- | --- | --- |
| \<20% | 7 (7.9%) | 0 |
| 20-21% | 29 (32.6%) | 0 |
| 21-22% | 30 (33.7%) | 0 |
| 22-23% | 21 (23.6%) | 0 |
| 23%+ | 2 (2.2%) | 0 |


## Power distribution

Q-Cells offers more 600W+ panels (19% of lineup)


| Power band | Q-Cells | QSun Solar |
| --- | --- | --- |
| \<400W | 20 (22.5%) | 0 |
| 400-499W | 41 (46.1%) | 0 |
| 500-599W | 11 (12.4%) | 0 |
| 600-699W | 17 (19.1%) | 0 |


## Cell technology

Dominant cell tech: **PERC** (43%)


| Technology | Q-Cells | QSun Solar |
| --- | --- | --- |
| PERC | 38 (42.7%) | 0 |
| N-type | 23 (25.8%) | 0 |
| Unknown | 20 (22.5%) | 0 |
| TOPCon | 8 (9.0%) | 0 |


## Top panels, Q-Cells


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [Q.PEAK DUO ML-G12S.3 / BFG 675](https://comparepv.com/panel/q-cells-q-peak-duo-ml-g12s-3-bfg-675) | 675 | 21.7 | -0.340 | Monocrystalline |
| 2 | [Q.PEAK DUO ML-G12S.3 / BFG 670](https://comparepv.com/panel/q-cells-q-peak-duo-ml-g12s-3-bfg-670) | 670 | 21.6 | -0.340 | Monocrystalline |
| 3 | [Q.PEAK DUO ML-G12S.3 / BFG 665](https://comparepv.com/panel/q-cells-q-peak-duo-ml-g12s-3-bfg-665) | 665 | 21.4 | -0.340 | Monocrystalline |
| 4 | [Q.PEAK DUO ML-G12S.3 / BFG 660](https://comparepv.com/panel/q-cells-q-peak-duo-ml-g12s-3-bfg-660) | 660 | 21.2 | -0.340 | Monocrystalline |
| 5 | [Q.PEAK DUO ML-G12S.3 / BFG 655](https://comparepv.com/panel/q-cells-q-peak-duo-ml-g12s-3-bfg-655) | 655 | 21.1 | -0.340 | Monocrystalline |
| 6 | [Q.PEAK DUO ML-G12S.3 / BFG 650](https://comparepv.com/panel/q-cells-q-peak-duo-ml-g12s-3-bfg-650) | 650 | 20.9 | -0.340 | Monocrystalline |
| 7 | [Q.TRON XL-G2.3 / BFG 645](https://comparepv.com/panel/q-cells-q-tron-xl-g2-3-bfg-645) | 645 | 23.1 | -0.290 | Monocrystalline |
| 8 | [Q.TRON XL-G2.3 / BFG 640](https://comparepv.com/panel/q-cells-q-tron-xl-g2-3-bfg-640) | 640 | 22.9 | -0.290 | Monocrystalline |
| 9 | [Q.TRON XL-G2.3 / BFG 635](https://comparepv.com/panel/hanwha-q-cells-america-inc-q-tron-xl-g2-3-bfg-635) | 635 | 22.7 | -0.300 | Monocrystalline |
| 10 | [Q.TRON XL-G2.3 / BFG 630](https://comparepv.com/panel/hanwha-q-cells-america-inc-q-tron-xl-g2-3-bfg-630) | 630 | 22.6 | -0.300 | Monocrystalline |


## Summary

Q-Cells, now operating as Hanwha Q CELLS, traces its origins to Germany where it was founded in 1999 before being acquired by South Korean conglomerate Hanwha Group in 2012. It is headquartered in Seoul and maintains a significant US manufacturing footprint, with module plants in Dalton and Cartersville, Georgia that together represent the largest solar manufacturing capacity in the Western Hemisphere. The company holds confirmed BloombergNEF Tier 1 status and, according to SolarReviews, ranked third among global solar panel manufacturers in 2025. Its global module production capacity is reported at roughly 11 GW annually. Q-SUN Solar is a Chinese manufacturer founded in 2014 and headquartered in Nanjing, Jiangsu, with reported annual module capacity above 4 GW. Its production facilities carry ISO 9001, ISO 14001, and ISO 45001 certifications and TUV Germany approval, but no BloombergNEF Tier 1 designation for Q-SUN Solar was found in publicly available sources as of mid-2025. On institutional footprint, Q-Cells holds a meaningfully stronger position.

Q-Cells' residential and commercial catalog centers on the Q.PEAK DUO range, built on Q.ANTUM DUO Z technology with efficiencies reaching up to roughly 21-22.5%, and the Q.TRON line which uses N-type TOPCon cells. The brand is known for a notably low temperature coefficient - as low as -0.29%/degC - which benefits output in hot climates, and pairs this with a 25-year product and performance warranty. Pricing is generally positioned 15-20% below premium-tier competitors such as Maxeon, making it a competitive choice for standard residential rooftops, commercial installations, and light utility projects. Q-SUN Solar focuses its lineup on N-type TOPCon modules across two main families: the Mercury Series covering mono-facial and bifacial variants spanning 400-720 W for commercial and utility-scale deployments, and the Onyx Series of full-black bifacial double-glass panels targeting residential aesthetics. The Onyx line reaches up to 23% module efficiency with a 30-year power output warranty and a low 0.4% annual degradation rate - specifications that are competitive on paper.

For most buyers in 2025, Q-Cells is the more defensible default: its BloombergNEF Tier 1 status eases project financing, its US domestic production reduces supply-chain and tariff exposure, and its long warranty track record is backed by a large, publicly accountable parent company. Q-SUN Solar is a credible option for cost-sensitive commercial or utility buyers who have vetted the manufacturer independently and are comfortable with a supplier that lacks confirmed Tier 1 bankability - but it carries more counterparty risk over a 25-30 year panel lifetime.

\---LINKS---

\- https://www.solarreviews.com/blog/hanwha-q-cells-solar-panels-complete-review \| Expert Review of Qcells Solar Panels for 2025 - SolarReviews \| review

\- https://solartechonline.com/blog/hanwha-q-cells-solar-panels-review-2025/ \| Hanwha Q CELLS Solar Panels Review 2025 - SolarTechOnline \| review

\- https://www.ecowatch.com/solar/reviews/qcells-solar-panels \| QCells Solar Panels Review 2025 - EcoWatch \| review

\- https://taiyangnews.info/business/hanwha-solutions-planning-8-4-gw-us-production-capacity \| Hanwha Solutions Planning 8.4 GW US Production Capacity - TaiyangNews \| article

\- https://www.enfsolar.com/q-sun-solar \| Q-SUN Solar manufacturer profile - ENF Solar \| article

Sources:

\- \[Expert Review of Qcells Solar Panels for 2025 - SolarReviews\](https://www.solarreviews.com/blog/hanwha-q-cells-solar-panels-complete-review)

\- \[Hanwha Q CELLS Solar Panels Review 2025 - SolarTechOnline\](https://solartechonline.com/blog/hanwha-q-cells-solar-panels-review-2025/)

\- \[QCells Solar Panels Review 2025 - EcoWatch\](https://www.ecowatch.com/solar/reviews/qcells-solar-panels)

\- \[Hanwha Solutions Planning 8.4 GW US Production Capacity - TaiyangNews\](https://taiyangnews.info/business/hanwha-solutions-planning-8-4-gw-us-production-capacity)

\- \[Q-SUN Solar manufacturer profile - ENF Solar\](https://www.enfsolar.com/q-sun-solar)

Written by claude-sonnet from the figures above.


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- [ARTsolar vs QSun Solar](https://comparepv.com/artsolar-vs-qsun-solar)


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Source: https://comparepv.com/q-cells-vs-qsun-solar

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