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

# JA Solar vs S-Energy

JA Solar has the broader catalog (504 vs 91 models). JA Solar leads on peak efficiency at 24.80%. S-Energy leans bifacial (77% of lineup).


## The two companies


| Attribute | JA Solar | S-Energy |
| --- | --- | --- |
| Country | China | South Korea |
| Headquarters | Beijing | Seoul |
| Founded | 2005 | 2011 |
| Employees | 37,289 |  |
| Annual capacity | 100+ GW/year |  |
| Tier 1 | yes | no |
| Listed | SZSE: 002459 |  |
| Website | [https://www.jasolar.com](https://www.jasolar.com) | [https://www.s-energy.com](https://www.s-energy.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...


## Catalog & Power


| Measure | JA Solar | S-Energy | Margin |
| --- | --- | --- | --- |
| Panel Models | 504 | 91 | +413 |
| Max Power | 740 W | 665 W | +75 W |
| Avg Power | 456 W | 512 W | +56 W |


## Efficiency


| Measure | JA Solar | S-Energy | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.80% | 22.38% | +2.42 pp |
| Avg Efficiency | 21.13% | 21.00% | +0.14 pp |


## Reliability & Warranty


| Measure | JA Solar | S-Energy | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.322%/°C | -0.339%/°C | +0.017 |
| Bifacial Share | 238 (47%) | 70 (77%) | +30 pp |
| Avg Warranty | 27.9 yrs | 27.7 yrs | +0.1 yr |


## Efficiency distribution

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


| Efficiency band | JA Solar | S-Energy |
| --- | --- | --- |
| \<20% | 112 (22.2%) | 0 |
| 20-21% | 99 (19.6%) | 50 (54.9%) |
| 21-22% | 112 (22.2%) | 34 (37.4%) |
| 22-23% | 107 (21.2%) | 7 (7.7%) |
| 23%+ | 74 (14.7%) | 0 |


## Power distribution

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


| Power band | JA Solar | S-Energy |
| --- | --- | --- |
| \<400W | 142 (28.2%) | 4 (4.4%) |
| 400-499W | 173 (34.3%) | 36 (39.6%) |
| 500-599W | 120 (23.8%) | 40 (44.0%) |
| 600-699W | 60 (11.9%) | 11 (12.1%) |
| 700W+ | 9 (1.8%) | 0 |


## Cell technology

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

Dominant cell tech: **PERC** (59%)


| Technology | JA Solar | S-Energy |
| --- | --- | --- |
| PERC | 247 (49.0%) | 54 (59.3%) |
| TOPCon | 146 (29.0%) | 25 (27.5%) |
| N-type | 90 (17.9%) | 0 |
| Unknown | 16 (3.2%) | 12 (13.2%) |
| 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, S-Energy


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [SL85-66BDL-665R](https://comparepv.com/panel/s-energy-sl85-66bdl-665r) | 665 | 21.4 | -0.340 | Monocrystalline |
| 2 | [SL85-66BDL-660R](https://comparepv.com/panel/s-energy-sl85-66bdl-660r) | 660 | 21.3 | -0.340 | Monocrystalline |
| 3 | [SL85-66BDL-655R](https://comparepv.com/panel/s-energy-sl85-66bdl-655r) | 655 | 21.1 | -0.340 | Monocrystalline |
| 4 | [SL85-66BDL-650R](https://comparepv.com/panel/s-energy-sl85-66bdl-650r) | 650 | 20.9 | -0.340 | Monocrystalline |
| 5 | [SL85-66BDL-645R](https://comparepv.com/panel/s-energy-sl85-66bdl-645r) | 645 | 20.8 | -0.340 | Monocrystalline |
| 6 | [SL65-78TDP-625R](https://comparepv.com/panel/s-energy-sl65-78tdp-625r) | 625 | 22.4 | -0.300 | Monocrystalline |
| 7 | [SL65-78TDP-620R](https://comparepv.com/panel/s-energy-sl65-78tdp-620r) | 620 | 22.2 | -0.300 | Monocrystalline |
| 8 | [SL65-78TDP-615R](https://comparepv.com/panel/s-energy-sl65-78tdp-615r) | 615 | 22.0 | -0.300 | Monocrystalline |
| 9 | [SL65-78TDP-610R](https://comparepv.com/panel/s-energy-sl65-78tdp-610r) | 610 | 21.8 | -0.300 | Monocrystalline |
| 10 | [SL65-78TDP-605R](https://comparepv.com/panel/s-energy-sl65-78tdp-605r) | 605 | 21.7 | -0.300 | Monocrystalline |


## Summary

JA Solar, founded in 2005 and headquartered in China, is one of the world's largest photovoltaic module manufacturers, with a production capacity exceeding 100 GW and a workforce of over 37,000 employees. The company is listed on the Shenzhen Stock Exchange, holds Tier 1 bankable status, and jointly claimed the top position in Wood Mackenzie's Global Solar Module Manufacturer Ranking for the first half of 2025. S-Energy is a South Korean manufacturer founded in 2011, operating at a significantly smaller scale - with production capacity of approximately 500 MW - and does not currently hold Tier 1 bankable status. JA Solar's product portfolio spans 524 panel models, compared to 91 for S-Energy. Both manufacturers rely primarily on PERC cell technology - JA Solar at 52.1% of its portfolio and S-Energy at 59.3% - while JA Solar has also been aggressively expanding into TOPCon. JA Solar leads on peak specifications, with a maximum module power of 740 Wp and maximum efficiency of 24.4%, versus S-Energy's 665 Wp and 22.38%. However, S-Energy's more concentrated portfolio of newer models delivers a higher average power output of 512 Wp compared to JA Solar's 442 Wp, and a notably higher bifacial share of 76.9% versus 44.3%.

JA Solar's Tier 1 bankable status and global manufacturing footprint - including a new facility in Oman targeting Europe, the Middle East, and the US - make it the standard choice for utility-scale ground-mount projects and large commercial C&I installations where lender and investor bankability requirements are non-negotiable. Its broad portfolio, reaching up to 740 Wp and 24.4% peak efficiency, supports high-density installations that minimize land use. S-Energy's strength lies in its bifacial-heavy product mix, making it well suited to flat-roof commercial deployments and residential rooftop installs where rear-side irradiance capture can improve system yield meaningfully. Its average module power of 512 Wp is competitive for commercial-scale rooftop and smaller C&I projects. S-Energy's average temperature coefficient of -0.339%/°C is marginally less favorable than JA Solar's -0.323%/°C, a consideration in warmer climates. Warranty terms are comparable across both portfolios, averaging 27.85 years for JA Solar and 27.75 years for S-Energy.

For international buyers - particularly project developers, EPCs, and institutional investors - JA Solar's Tier 1 bankability, massive production scale, and established global distribution network make it the lower-risk procurement choice for financed projects. S-Energy may appeal to buyers focused on bifacial residential or smaller commercial installations where Tier 1 status is not a hard financing requirement and a high bifacial ratio in the available product range aligns well with the installation type, though buyers seeking project finance from lenders that mandate Tier 1-rated modules should weigh this constraint carefully.

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


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Source: https://comparepv.com/ja-solar-vs-s-energy

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