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

# JA Solar vs Solar-Fabrik

JA Solar has the broader catalog (504 vs 43 models). JA Solar leads on peak efficiency at 24.80%. Solar-Fabrik leans bifacial (100% of lineup).


## The two companies


| Attribute | JA Solar | Solar-Fabrik |
| --- | --- | --- |
| Country | China | Germany |
| Headquarters | Beijing | Laufach |
| Founded | 2005 | 1996 |
| Employees | 37,289 | 50-200 |
| Annual capacity | 100+ GW/year | \<1 GW/year |
| Tier 1 | yes |  |
| Listed | SZSE: 002459 |  |
| Website | [https://www.jasolar.com](https://www.jasolar.com) | [https://solar-fabrik.de](https://solar-fabrik.de) |

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...

Solar Fabrik is a German family-owned manufacturer of photovoltaic modules, specializing in high-quality glass-glass panels with N-TYPE/TOPCon technology and a 30-year product and performance warranty. Originally founded in Freiburg in 1996 as Solar-Fabrik AG, the brand was revived in 2016 after insolvency and...


## Catalog & Power


| Measure | JA Solar | Solar-Fabrik | Margin |
| --- | --- | --- | --- |
| Panel Models | 504 | 43 | +461 |
| Max Power | 740 W | 625 W | +115 W |
| Avg Power | 456 W | 450 W | +6 W |


## Efficiency


| Measure | JA Solar | Solar-Fabrik | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.80% | 24.27% | +0.53 pp |
| Avg Efficiency | 21.13% | 21.96% | +0.83 pp |


## Reliability & Warranty


| Measure | JA Solar | Solar-Fabrik | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.322%/°C | -0.285%/°C | +0.037 |
| Bifacial Share | 238 (47%) | 43 (100%) | +53 pp |
| Avg Warranty | 27.9 yrs | 29.8 yrs | +1.9 yr |


## Efficiency distribution

Solar-Fabrik skews to higher efficiency: 49% of lineup is 23%+


| Efficiency band | JA Solar | Solar-Fabrik |
| --- | --- | --- |
| \<20% | 112 (22.2%) | 5 (11.6%) |
| 20-21% | 99 (19.6%) | 3 (7.0%) |
| 21-22% | 112 (22.2%) | 3 (7.0%) |
| 22-23% | 107 (21.2%) | 11 (25.6%) |
| 23%+ | 74 (14.7%) | 21 (48.8%) |


## Power distribution

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


| Power band | JA Solar | Solar-Fabrik |
| --- | --- | --- |
| \<400W | 142 (28.2%) | 6 (14.0%) |
| 400-499W | 173 (34.3%) | 35 (81.4%) |
| 500-599W | 120 (23.8%) | 0 |
| 600-699W | 60 (11.9%) | 2 (4.7%) |
| 700W+ | 9 (1.8%) | 0 |


## Cell technology

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

Dominant cell tech: **TOPCon** (63%)


| Technology | JA Solar | Solar-Fabrik |
| --- | --- | --- |
| PERC | 247 (49.0%) | 1 (2.3%) |
| TOPCon | 146 (29.0%) | 27 (62.8%) |
| N-type | 90 (17.9%) | 2 (4.7%) |
| Unknown | 16 (3.2%) | 0 |
| HJT | 5 (1.0%) | 0 |
| Back Contact | 0 | 13 (30.2%) |


## 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, Solar-Fabrik


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [S4-DG625-132TMax](https://comparepv.com/panel/solar-fabrik-s4-dg625-132tmax) | 625 | 23.1 | -0.300 | Monocrystalline |
| 2 | [S4-DG620-132TMax](https://comparepv.com/panel/solar-fabrik-s4-dg620-132tmax) | 620 | 22.9 | -0.300 | Monocrystalline |
| 3 | [Mono S4 Halfcut BC White 490](https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-bc-white-490) | 490 | 24.0 | -0.260 | Monocrystalline |
| 4 | [Mono S4 Halfcut BC Series White 490W](https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-bc-series-white-490w) | 490 | 24.0 | - | Monocrystalline |
| 5 | [Mono S4 Halfcut BC White 485](https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-bc-white-485) | 485 | 23.8 | -0.260 | Monocrystalline |
| 6 | [Mono S4 Quartercut Premium DE Series 485W](https://comparepv.com/panel/solar-fabrik-mono-s4-quartercut-premium-de-series-485w) | 485 | 24.3 | -0.260 | Monocrystalline |
| 7 | [Mono S4 Halfcut BC White 480-490W](https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-bc-white-480-490w) | 485 | 23.8 | -0.260 | Monocrystalline |
| 8 | [Mono S4 Halfcut BC Series White 485W](https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-bc-series-white-485w) | 485 | 23.8 | - | Monocrystalline |
| 9 | [Mono S4 Halfcut BC Full Black 480W](https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-bc-full-black-480w) | 480 | 23.5 | -0.260 | Monocrystalline |
| 10 | [Mono S4 Halfcut BC White 480](https://comparepv.com/panel/solar-fabrik-mono-s4-halfcut-bc-white-480) | 480 | 23.5 | -0.260 | Monocrystalline |


## Summary

JA Solar and Solar-Fabrik represent two fundamentally different tiers of the global solar PV industry. JA Solar, founded in 2005 and headquartered in China, employs over 37,000 people and operates with a module production capacity exceeding 100 GW - making it one of the largest PV manufacturers in the world and placing it jointly at the top of Wood Mackenzie's Global Solar Module Manufacturer Ranking for the first half of 2025. It holds Tier 1 bankable status from both S&P Global Commodity Insights and BloombergNEF, which is essential for project finance on large installations. Solar-Fabrik, by contrast, was founded in Freiburg, Germany in 1996 as one of Europe's solar pioneers, but operates at a much smaller scale with 50-200 employees and under 1 GW of production capacity. It is not classified as Tier 1 bankable, though it holds the EUPD TOP BRAND PV designation for 2021-2024 and the SolarProsumer Award for 2022-2024, reflecting strong brand recognition in European residential markets.

JA Solar's broad portfolio of over 524 modules spans PERC (52% of the lineup) and a growing TOPCon range, with a maximum panel output of 740 Wp and an average module efficiency of approximately 20.9%. Around 44% of its panels are bifacial. This breadth makes JA Solar well-suited for utility-scale ground-mount projects, large commercial C&I installations, and any context where bankability and supply chain reliability are non-negotiable. Solar-Fabrik's smaller, more focused lineup of 21 modules is 100% bifacial and led by TOPCon technology (over 66% of models), with an average temperature coefficient of -0.286%/°C - slightly better than JA Solar's -0.323%/°C. The company reports a defect rate below 0.003% and offers an average warranty approaching 29.5 years. In May 2025, Solar-Fabrik broke ground on a new 300 MW domestic production facility in Germany, reinforcing its "Made in Germany" credentials for premium residential and light commercial applications.

For international buyers, the choice between the two comes down to project scale and positioning. JA Solar is the pragmatic, bankable choice for any project requiring financed procurement, large volumes, or a broad module selection - from residential rooftop to multi-megawatt ground-mount. Solar-Fabrik is best suited for premium residential or boutique commercial projects in Europe where buyers place high value on German engineering heritage, fully bifacial TOPCon performance, and a compact, quality-controlled product range, and where the absence of Tier 1 bankability is not a constraint.

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 Solar-Fabrik](https://comparepv.com/ae-solar-vs-solar-fabrik)
- [JA Solar vs AEET](https://comparepv.com/ja-solar-vs-aeet)
- [AIKO vs Solar-Fabrik](https://comparepv.com/aiko-vs-solar-fabrik)
- [JA Solar vs AKCOME](https://comparepv.com/ja-solar-vs-akcome)
- [ARTsolar vs Solar-Fabrik](https://comparepv.com/artsolar-vs-solar-fabrik)


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

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