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

# JA Solar vs Philadelphia Solar

JA Solar has the broader catalog (504 vs 99 models). JA Solar leads on peak efficiency at 24.80%. Philadelphia Solar leans bifacial (67% of lineup).


## The two companies


| Attribute | JA Solar | Philadelphia Solar |
| --- | --- | --- |
| Country | China | Jordan |
| Headquarters | Beijing | Amman |
| Founded | 2005 | 2007 |
| Employees | 37,289 | 51-200 |
| Annual capacity | 100+ GW/year | 0.58 GW/year |
| Tier 1 | yes | yes |
| Listed | SZSE: 002459 |  |
| Website | [https://www.jasolar.com](https://www.jasolar.com) | [http://www.philadelphia-solar.com](http://www.philadelphia-solar.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...

Philadelphia Solar is a Jordanian Tier 1 solar module and steel mounting structure manufacturer that was established in 2007. It is the first MEA-based company to manufacture, develop, design, construct, own, and operate utility-scale, commercial and industrial photovoltaic plants. The company exports to over 52...


## Catalog & Power


| Measure | JA Solar | Philadelphia Solar | Margin |
| --- | --- | --- | --- |
| Panel Models | 504 | 99 | +405 |
| Max Power | 740 W | 650 W | +90 W |
| Avg Power | 456 W | 471 W | +15 W |


## Efficiency


| Measure | JA Solar | Philadelphia Solar | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.80% | 23.53% | +1.27 pp |
| Avg Efficiency | 21.13% | 20.90% | +0.24 pp |


## Reliability & Warranty


| Measure | JA Solar | Philadelphia Solar | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.322%/°C | -0.333%/°C | +0.011 |
| Bifacial Share | 238 (47%) | 66 (67%) | +19 pp |
| Avg Warranty | 27.9 yrs | 26.9 yrs | +1.0 yr |


## Efficiency distribution

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


| Efficiency band | JA Solar | Philadelphia Solar |
| --- | --- | --- |
| \<20% | 112 (22.2%) | 28 (28.3%) |
| 20-21% | 99 (19.6%) | 16 (16.2%) |
| 21-22% | 112 (22.2%) | 25 (25.3%) |
| 22-23% | 107 (21.2%) | 21 (21.2%) |
| 23%+ | 74 (14.7%) | 9 (9.1%) |


## Power distribution

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


| Power band | JA Solar | Philadelphia Solar |
| --- | --- | --- |
| \<400W | 142 (28.2%) | 28 (28.3%) |
| 400-499W | 173 (34.3%) | 21 (21.2%) |
| 500-599W | 120 (23.8%) | 43 (43.4%) |
| 600-699W | 60 (11.9%) | 7 (7.1%) |
| 700W+ | 9 (1.8%) | 0 |


## Cell technology

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

Dominant cell tech: **PERC** (55%)


| Technology | JA Solar | Philadelphia Solar |
| --- | --- | --- |
| PERC | 247 (49.0%) | 54 (54.5%) |
| TOPCon | 146 (29.0%) | 0 |
| N-type | 90 (17.9%) | 37 (37.4%) |
| Unknown | 16 (3.2%) | 8 (8.1%) |
| 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, Philadelphia Solar


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [PS-MNB156(HCBF)-650W](https://comparepv.com/panel/philadelphia-solar-ps-mnb156-hcbf-650w) | 650 | 23.3 | -0.290 | Monocrystalline |
| 2 | [PS-MNB156(HCBF)-645W](https://comparepv.com/panel/philadelphia-solar-ps-mnb156-hcbf-645w) | 645 | 23.1 | -0.290 | Monocrystalline |
| 3 | [PS-MNB156(HCBF)-640W](https://comparepv.com/panel/philadelphia-solar-ps-mnb156-hcbf-640w) | 640 | 22.9 | -0.290 | Monocrystalline |
| 4 | [PS-MNB156(HCBF)-635W](https://comparepv.com/panel/philadelphia-solar-ps-mnb156-hcbf-635w) | 635 | 22.8 | -0.290 | Monocrystalline |
| 5 | [PS-MNB156(HCBF)-630W](https://comparepv.com/panel/philadelphia-solar-ps-mnb156-hcbf-630w) | 630 | 22.6 | -0.290 | Monocrystalline |
| 6 | [PS-MNB144(HCBF)-600W](https://comparepv.com/panel/philadelphia-solar-ps-mnb144-hcbf-600w) | 600 | 23.2 | -0.290 | Monocrystalline |
| 7 | [PS-MNG144(HCBF)-600W](https://comparepv.com/panel/philadelphia-solar-ps-mng144-hcbf-600w) | 600 | 23.2 | -0.290 | Monocrystalline |
| 8 | [PS-MNB144(HCBF)-595W](https://comparepv.com/panel/philadelphia-solar-ps-mnb144-hcbf-595w) | 595 | 23.0 | -0.290 | Monocrystalline |
| 9 | [PS-MNG144(HCBF)-595W](https://comparepv.com/panel/philadelphia-solar-ps-mng144-hcbf-595w) | 595 | 23.0 | -0.290 | Monocrystalline |
| 10 | [PS-MNB144(HCBF)-590W](https://comparepv.com/panel/philadelphia-solar-ps-mnb144-hcbf-590w) | 590 | 22.8 | -0.290 | Monocrystalline |


## Summary

JA Solar and Philadelphia Solar are both Tier 1 bankable manufacturers, but they occupy dramatically different positions in the global solar market. JA Solar was founded in 2005 in China, is listed on the Shenzhen Stock Exchange, employs over 37,000 people, and operates a manufacturing capacity exceeding 100 GW - making it the second-largest module shipper worldwide, with shipments reaching approximately 79 GW in 2024. Philadelphia Solar, founded in 2007 and headquartered in Amman, Jordan, is a far smaller operation with a production capacity of around 0.58 GW and a staff of 51-200 employees. Despite the size difference, both companies have achieved Tier 1 bankability status, giving project financiers confidence in either brand. Philadelphia Solar's Jordan origin provides a strategic advantage for markets subject to anti-dumping or countervailing duties on Chinese goods, as its modules are currently exempt from such tariffs in several jurisdictions.

Technologically, the two manufacturers take distinct paths. JA Solar offers a broad portfolio of 524 panel models spanning PERC (approximately 52% of the range) and newer TOPCon lines, with an average efficiency of around 20.9%, a maximum of 24.4%, and bifacial options covering roughly 44% of the catalogue. The depth of its range makes it well suited to residential rooftop installs, large-scale C&I projects, and utility-scale ground-mount developments where volume, price competitiveness, and supply chain reliability matter most - the company earned Top Performer status in the PVEL 2025 Scorecard for the tenth consecutive time. Philadelphia Solar's compact catalogue of 14 models is built entirely on N-type cells, every panel is bifacial, average efficiency reaches nearly 23%, and the temperature coefficient of -0.29%/°C is better than JA Solar's average of -0.32%/°C. A standard 30-year performance warranty rounds out a technically premium proposition that suits utility-scale ground-mount projects, agrivoltaic installations, and C&I rooftops where maximizing yield per square meter is the primary objective.

For international buyers choosing between the two, the decision hinges on project scale, supply chain priorities, and technology preference. JA Solar is the lower-risk choice for high-volume procurement, offering proven logistics, a broad product range, and highly competitive pricing. Philadelphia Solar is the stronger option when N-type bifacial performance, tariff exemptions outside China, or supplier diversification are decisive factors - accepting a narrower selection and potentially longer lead times as trade-offs.

Written by claude-sonnet from the figures above.


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


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

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