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

# JA Solar vs Silfab

JA Solar has the broader catalog (504 vs 47 models). JA Solar leads on peak efficiency at 24.80%. JA Solar leans bifacial (47% of lineup).


## The two companies


| Attribute | JA Solar | Silfab |
| --- | --- | --- |
| Country | China | Canada |
| Headquarters | Beijing | Mississauga |
| Founded | 2005 | 2010 |
| Employees | 37,289 | 800+ |
| Annual capacity | 100+ GW/year | 1.6 GW/year |
| Tier 1 | yes | yes |
| Listed | SZSE: 002459 |  |
| Website | [https://www.jasolar.com](https://www.jasolar.com) | [https://www.silfabsolar.com](https://www.silfabsolar.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...

Silfab Solar is a North American leader in the design, development, and manufacture of high-efficiency, premium-quality solar cells and modules. Leveraging over 40 years of solar experience, they operate fully automated facilities in Washington, South Carolina, and Ontario, Canada. Their products are designed and...


## Catalog & Power


| Measure | JA Solar | Silfab | Margin |
| --- | --- | --- | --- |
| Panel Models | 504 | 47 | +457 |
| Max Power | 740 W | 640 W | +100 W |
| Avg Power | 456 W | 429 W | +27 W |


## Efficiency


| Measure | JA Solar | Silfab | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.80% | 22.92% | +1.88 pp |
| Avg Efficiency | 21.13% | 20.56% | +0.57 pp |


## Reliability & Warranty


| Measure | JA Solar | Silfab | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.322%/°C | -0.341%/°C | +0.020 |
| Bifacial Share | 238 (47%) | 14 (30%) | +17 pp |
| Avg Warranty | 27.9 yrs | 30.0 yrs | +2.1 yr |


## Efficiency distribution

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


| Efficiency band | JA Solar | Silfab |
| --- | --- | --- |
| \<20% | 112 (22.2%) | 19 (40.4%) |
| 20-21% | 99 (19.6%) | 5 (10.6%) |
| 21-22% | 112 (22.2%) | 10 (21.3%) |
| 22-23% | 107 (21.2%) | 13 (27.7%) |
| 23%+ | 74 (14.7%) | 0 |


## Power distribution

JA Solar offers more 600W+ panels (14% of lineup)


| Power band | JA Solar | Silfab |
| --- | --- | --- |
| \<400W | 142 (28.2%) | 22 (46.8%) |
| 400-499W | 173 (34.3%) | 10 (21.3%) |
| 500-599W | 120 (23.8%) | 12 (25.5%) |
| 600-699W | 60 (11.9%) | 3 (6.4%) |
| 700W+ | 9 (1.8%) | 0 |


## Cell technology

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

Dominant cell tech: **PERC** (45%)


| Technology | JA Solar | Silfab |
| --- | --- | --- |
| PERC | 247 (49.0%) | 21 (44.7%) |
| TOPCon | 146 (29.0%) | 1 (2.1%) |
| N-type | 90 (17.9%) | 19 (40.4%) |
| Unknown | 16 (3.2%) | 6 (12.8%) |
| 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, Silfab


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [SIL-640 XL](https://comparepv.com/panel/silfab-sil-640-xl) | 640 | 22.9 | -0.290 | Monocrystalline |
| 2 | [SIL-630 XL](https://comparepv.com/panel/silfab-sil-630-xl) | 630 | 22.6 | -0.290 | Monocrystalline |
| 3 | [SIL-620 XL](https://comparepv.com/panel/silfab-sil-620-xl) | 620 | 22.2 | -0.290 | Monocrystalline |
| 4 | [SIL-590 XM+](https://comparepv.com/panel/silfab-sil-590-xm) | 590 | 22.8 | -0.290 | Monocrystalline |
| 5 | [SIL-580-XM+-BIFACIAL](https://comparepv.com/panel/silfab-sil-580-xm-bifacial) | 580 | 22.4 | -0.290 | Monocrystalline |
| 6 | [SIL-570 XM+ BIFACIAL](https://comparepv.com/panel/silfab-sil-570-xm-bifacial) | 570 | 22.1 | -0.290 | Monocrystalline |
| 7 | [SIL-570 XM+](https://comparepv.com/panel/silfab-sil-570-xm) | 570 | 22.1 | -0.290 | Monocrystalline |
| 8 | [SIL-540-XM-BIFACIAL](https://comparepv.com/panel/silfab-sil-540-xm-bifacial) | 540 | 22.7 | -0.290 | Monocrystalline |
| 9 | [SIL-530 QM](https://comparepv.com/panel/silfab-sil-530-qm) | 530 | 22.3 | -0.290 | Monocrystalline |
| 10 | [SIL-530 XM](https://comparepv.com/panel/silfab-sil-530-xm) | 530 | 22.3 | -0.290 | Monocrystalline |


## Summary

JA Solar and Silfab represent two very different tiers of the global solar PV manufacturing landscape. JA Solar was founded in 2005 in China, is listed on the Shenzhen Stock Exchange, and has grown into one of the world's top module producers - according to Wood Mackenzie's H1 2025 Global Solar Module Manufacturer Ranking, it jointly topped the global list alongside Trinasolar. With a production capacity exceeding 100 GW, a workforce of over 37,000 employees, and a product portfolio of 524 panel models, JA Solar operates at a scale few competitors can match. Silfab, by contrast, was founded in 2010 in Canada and has positioned itself as the leading solar module manufacturer in North America, operating facilities in Ontario and Bellingham, Washington. With a production capacity of 1.6 GW and a focused lineup of 14 models, Silfab targets the premium residential and commercial segment of the North American market. Both manufacturers hold Tier 1 bankable status, confirming their financial stability and manufacturing consistency for project finance purposes.

On the technology side, JA Solar's portfolio is broad but still predominantly PERC-based (over 52% of models), with its newer Deep Blue series incorporating TOPCon cells and bifacial designs. Its maximum panel output reaches 740 Wp with peak efficiency of 24.4%, while average efficiency across the full range sits at 20.9%. Silfab's narrower lineup leans heavily into N-type technology (over 71% of models), yielding a higher average efficiency of 21.7%, a slightly better average temperature coefficient of -0.31% per degree Celsius, and a full 30-year linear power warranty as standard. For utility-scale and large ground-mount projects, JA Solar's scale, pricing competitiveness, and broad module selection make it a natural fit. Silfab's domestic manufacturing credentials - including Buy American Act certification and a track record with U.S. federal and military installations - make it the preferred choice for U.S. public procurement and residential installers who prioritize local sourcing.

For international buyers choosing between the two, the decision largely hinges on geography and priorities. Installers and developers in Europe, Asia-Pacific, or emerging markets will find JA Solar far more accessible through established distribution networks, with a competitive price-to-performance ratio that suits everything from residential rooftop to utility-scale. Buyers in North America - particularly those working under domestic content requirements or seeking a premium brand with strong local support - will find Silfab a credible and well-warranted alternative, even if its production scale limits volume pricing advantages compared to the Chinese giants.

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)
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- [AIKO vs Silfab](https://comparepv.com/aiko-vs-silfab)
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- [ARTsolar vs Silfab](https://comparepv.com/artsolar-vs-silfab)


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Source: https://comparepv.com/ja-solar-vs-silfab

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