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

# JA Solar vs Q-Cells

JA Solar has the broader catalog (504 vs 89 models). JA Solar leads on peak efficiency at 24.80%.


## The two companies


| Attribute | JA Solar | Q-Cells |
| --- | --- | --- |
| Country | China | South Korea |
| Headquarters | Beijing | Seoul |
| Founded | 2005 | 1999 |
| Employees | 37,289 | 2000+ |
| Annual capacity | 100+ GW/year | 11.2 GW/year |
| Tier 1 | yes | yes |
| Listed | SZSE: 002459 | NASDAQ: HQCL |
| Website | [https://www.jasolar.com](https://www.jasolar.com) | [https://www.qcells.com](https://www.qcells.com) |

JA Solar is a global leader in the manufacturing of high-performance photovoltaic products. Founded in 2005, the company designs, develops, manufactures, and sells solar cells and modules. JA Solar's products are used in ground-mounted power plants, commercial & industrial rooftop PV systems, and residential rooftop...

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 | JA Solar | Q-Cells | Margin |
| --- | --- | --- | --- |
| Panel Models | 504 | 89 | +415 |
| Max Power | 740 W | 675 W | +65 W |
| Avg Power | 456 W | 468 W | +12 W |


## Efficiency


| Measure | JA Solar | Q-Cells | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.80% | 23.20% | +1.60 pp |
| Avg Efficiency | 21.13% | 21.21% | +0.08 pp |


## Reliability & Warranty


| Measure | JA Solar | Q-Cells | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.322%/°C | -0.325%/°C | +0.003 |
| Bifacial Share | 238 (47%) | 35 (39%) | +8 pp |
| Avg Warranty | 27.9 yrs | 27.0 yrs | +0.9 yr |


## Efficiency distribution

JA Solar skews to higher efficiency: 15% of lineup is 23%+


| Efficiency band | JA Solar | Q-Cells |
| --- | --- | --- |
| \<20% | 112 (22.2%) | 7 (7.9%) |
| 20-21% | 99 (19.6%) | 29 (32.6%) |
| 21-22% | 112 (22.2%) | 30 (33.7%) |
| 22-23% | 107 (21.2%) | 21 (23.6%) |
| 23%+ | 74 (14.7%) | 2 (2.2%) |


## Power distribution

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


| Power band | JA Solar | Q-Cells |
| --- | --- | --- |
| \<400W | 142 (28.2%) | 20 (22.5%) |
| 400-499W | 173 (34.3%) | 41 (46.1%) |
| 500-599W | 120 (23.8%) | 11 (12.4%) |
| 600-699W | 60 (11.9%) | 17 (19.1%) |
| 700W+ | 9 (1.8%) | 0 |


## Cell technology

Dominant cell tech: **PERC** (49%)

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


| Technology | JA Solar | Q-Cells |
| --- | --- | --- |
| PERC | 247 (49.0%) | 38 (42.7%) |
| TOPCon | 146 (29.0%) | 8 (9.0%) |
| N-type | 90 (17.9%) | 23 (25.8%) |
| Unknown | 16 (3.2%) | 20 (22.5%) |
| HJT | 5 (1.0%) | 0 |


## Top panels, JA Solar


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [JAM66D46-740/LB](https://comparepv.com/panel/ja-solar-jam66d46-740-lb) | 740 | 23.8 | -0.290 | Monocrystalline |
| 2 | [JAM66D46-735/LB](https://comparepv.com/panel/ja-solar-jam66d46-735-lb) | 735 | 23.7 | -0.290 | Monocrystalline |
| 3 | [JAM66D46-730/LB](https://comparepv.com/panel/ja-solar-jam66d46-730-lb) | 730 | 23.5 | -0.290 | Monocrystalline |
| 4 | [JAM66D46-725/LB](https://comparepv.com/panel/ja-solar-jam66d46-725-lb) | 725 | 23.3 | -0.290 | Monocrystalline |
| 5 | [JAM66D46-720/LB](https://comparepv.com/panel/ja-solar-jam66d46-720-lb) | 720 | 23.2 | -0.290 | Monocrystalline |
| 6 | [JAM66D46-715/LB](https://comparepv.com/panel/ja-solar-jam66d46-715-lb) | 715 | 23.0 | -0.290 | Monocrystalline |
| 7 | [JAM66D46-710/LB](https://comparepv.com/panel/ja-solar-jam66d46-710-lb) | 710 | 22.9 | -0.290 | Monocrystalline |
| 8 | [JAM66D46-705/LB](https://comparepv.com/panel/ja-solar-jam66d46-705-lb) | 705 | 22.7 | -0.290 | Monocrystalline |
| 9 | [JAM66D46-700/LB](https://comparepv.com/panel/ja-solar-jam66d46-700-lb) | 700 | 22.5 | -0.290 | Monocrystalline |
| 10 | [JAM66D46-695/LB](https://comparepv.com/panel/ja-solar-jam66d46-695-lb) | 695 | 22.4 | -0.290 | Monocrystalline |


## 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

JA Solar was founded in 2005 in China and has grown into one of the world's largest solar manufacturers, with a workforce exceeding 37,000 employees and a production capacity of over 100 GW per year. Q-Cells, now operating as Hanwha Q CELLS under South Korean conglomerate Hanwha, was founded in 1999 and carries a production capacity of 11.2 GW. Both manufacturers hold Tier 1 bankable status - JA Solar is listed on the Shenzhen Stock Exchange (SZSE) and Q-Cells on NASDAQ. The scale difference is substantial: JA Solar's catalogue spans 524 panel models compared to Q-Cells' 91, reflecting the Chinese manufacturer's strategy of covering the entire market spectrum from residential to utility. JA Solar achieved second place and Q-Cells third place in SolarReviews' 2025 manufacturer rankings, underlining that both are widely regarded as top-tier choices.

Both manufacturers lead their portfolios with PERC cell technology - accounting for 52% of JA Solar's lineup and 38% of Q-Cells'. JA Solar reaches a maximum panel output of 740 Wp and a peak module efficiency of 24.4%, positioning it strongly for utility-scale ground-mount projects and large commercial C&I installations where maximising output per string and minimising cost-per-watt are the primary drivers. Q-Cells achieves a slightly higher average portfolio efficiency of 21.26% versus 20.87% for JA Solar, and its proprietary Q.ANTUM technology incorporates anti-PID and anti-LID safeguards that appeal to buyers in demanding climates. Q-Cells also operates the largest solar manufacturing facility in the Western Hemisphere in Dalton, Georgia - a compliance advantage in markets that favour Western supply chains. Warranty terms across both portfolios are comparable: JA Solar averages 27.85 years and Q-Cells 27.09 years. Bifacial panel share is similar at 44.3% for JA Solar and 41.8% for Q-Cells.

Buyers choosing between the two will generally find JA Solar the stronger option for price-sensitive, large-scale deployments where output variety and supply reliability matter most. Q-Cells suits projects where premium brand perception, Western manufacturing credentials, or proven anti-degradation technology in residential or commercial rooftop contexts are the deciding factors.

Written by claude-sonnet from the figures above.


## Other comparisons

- [JA Solar vs A.B. Energy](https://comparepv.com/ja-solar-vs-a-b-energy)
- [AE Solar vs Q-Cells](https://comparepv.com/ae-solar-vs-q-cells)
- [JA Solar vs AEET](https://comparepv.com/ja-solar-vs-aeet)
- [AIKO vs Q-Cells](https://comparepv.com/aiko-vs-q-cells)
- [JA Solar vs AKCOME](https://comparepv.com/ja-solar-vs-akcome)
- [ARTsolar vs Q-Cells](https://comparepv.com/artsolar-vs-q-cells)


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

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