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

# JA Solar vs Runtech China

JA Solar has the broader catalog (504 vs 21 models). JA Solar leads on peak efficiency at 24.80%. JA Solar leans bifacial (47% of lineup).


## The two companies


| Attribute | JA Solar | Runtech China |
| --- | --- | --- |
| Country | China | China |
| Headquarters | Beijing | Xi'an |
| Founded | 2005 | 2008 |
| Employees | 37,289 | 50+ |
| Annual capacity | 100+ GW/year |  |
| Tier 1 | yes |  |
| Listed | SZSE: 002459 |  |
| Website | [https://www.jasolar.com](https://www.jasolar.com) | [http://www.runtechenergy.com](http://www.runtechenergy.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...

Runtech Energy, founded in 2008, is a leading independent solar production supplier and designer. They are a trader of solar modules and PV project developer, with over 500MW of premium quality modules deployed worldwide. Runtech is committed to providing high-quality solar products and system integration services.


## Catalog & Power


| Measure | JA Solar | Runtech China | Margin |
| --- | --- | --- | --- |
| Panel Models | 504 | 21 | +483 |
| Max Power | 740 W | 420 W | +320 W |
| Avg Power | 456 W | 301 W | +155 W |


## Efficiency


| Measure | JA Solar | Runtech China | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.80% | 24.30% | +0.50 pp |
| Avg Efficiency | 21.13% | 18.59% | +2.55 pp |


## Reliability & Warranty


| Measure | JA Solar | Runtech China | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.322%/°C | -0.350%/°C | +0.028 |
| Bifacial Share | 238 (47%) | 1 (5%) | +42 pp |
| Avg Warranty | 27.9 yrs | 25.0 yrs | +2.9 yr |


## Efficiency distribution

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


| Efficiency band | JA Solar | Runtech China |
| --- | --- | --- |
| \<20% | 112 (22.2%) | 13 (61.9%) |
| 20-21% | 99 (19.6%) | 4 (19.0%) |
| 21-22% | 112 (22.2%) | 3 (14.3%) |
| 22-23% | 107 (21.2%) | 0 |
| 23%+ | 74 (14.7%) | 1 (4.8%) |


## Power distribution

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


| Power band | JA Solar | Runtech China |
| --- | --- | --- |
| \<400W | 142 (28.2%) | 16 (76.2%) |
| 400-499W | 173 (34.3%) | 5 (23.8%) |
| 500-599W | 120 (23.8%) | 0 |
| 600-699W | 60 (11.9%) | 0 |
| 700W+ | 9 (1.8%) | 0 |


## Cell technology

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


| Technology | JA Solar | Runtech China |
| --- | --- | --- |
| PERC | 247 (49.0%) | 0 |
| TOPCon | 146 (29.0%) | 0 |
| N-type | 90 (17.9%) | 0 |
| Unknown | 16 (3.2%) | 21 (100.0%) |
| 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, Runtech China


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [RT420WM](https://comparepv.com/panel/runtech-china-rt420wm) | 420 | 21.6 | -0.350 | Monocrystalline |
| 2 | [RT415WM](https://comparepv.com/panel/runtech-china-rt415wm) | 415 | 21.3 | -0.350 | Monocrystalline |
| 3 | [RT410WM](https://comparepv.com/panel/runtech-china-rt410wm) | 410 | 21.0 | -0.350 | Monocrystalline |
| 4 | [RT405WM](https://comparepv.com/panel/runtech-china-rt405wm) | 405 | 20.8 | -0.350 | Monocrystalline |
| 5 | [RT400WM](https://comparepv.com/panel/runtech-china-rt400wm) | 400 | 20.5 | -0.350 | Monocrystalline |
| 6 | [RT395WM](https://comparepv.com/panel/runtech-china-rt395wm) | 395 | 20.2 | -0.350 | Monocrystalline |
| 7 | [RT390WM](https://comparepv.com/panel/runtech-china-rt390wm) | 390 | 20.0 | -0.350 | Monocrystalline |
| 8 | [RT-355M](https://comparepv.com/panel/runtech-china-rt-355m) | 355 | 18.5 | -0.410 | Polycrystalline |
| 9 | [RT 355M](https://comparepv.com/panel/runtech-china-rt-355m-1) | 355 | 18.5 | -0.410 | Polycrystalline |
| 10 | [RT-350M](https://comparepv.com/panel/runtech-china-rt-350m) | 350 | 18.0 | -0.410 | Polycrystalline |


## Summary

JA Solar and Runtech China are both China-headquartered solar manufacturers, but they occupy vastly different positions in the global market. JA Solar was founded in 2005 and is publicly listed on the Shenzhen Stock Exchange (SZSE). With over 37,000 employees and a production capacity exceeding 100 GW, it ranked jointly at the top of Wood Mackenzie's Global Solar Module Manufacturer Ranking in H1 2025 and shipped approximately 79.4 GW of modules in 2024 alone. It holds Tier 1 status from S&P Global Commodity Insights, confirming its financial resilience and bankability. Runtech China, founded in 2008 and operating with just over 50 employees, is a significantly smaller outfit with a limited panel catalog of 21 models and no independently verified Tier 1 standing, positioning it as a niche or value-segment supplier rather than a mainstream volume manufacturer.

On the technology side, JA Solar offers a broad portfolio of 524 panel models spanning PERC (its dominant technology at 52.1% of the lineup) and newer TOPCon-based products, reaching a maximum output of 740 Wp and an average efficiency of 20.87%. Its bifacial share of 44.3% and average warranty of 27.85 years make it a strong fit for residential rooftop installs, commercial C&I projects, and large-scale utility ground-mount arrays alike. Runtech China's portfolio tops out at 420 Wp with an average efficiency of 18.59%, a bifacial share of under 5%, and a 25-year average warranty - figures that are adequate for basic off-grid or small residential applications but fall short of the performance benchmarks expected in competitive utility or commercial tenders. The cell technology classification for the entire Runtech lineup is listed as unknown, which introduces additional due-diligence risk for procurement teams.

For international buyers choosing between the two, JA Solar is the clear recommendation for any project requiring bankability, long-term service support, and a well-documented technology roadmap. Runtech China may suit buyers with limited budgets and straightforward low-power requirements, but the lack of Tier 1 certification and narrow product transparency make it a difficult choice for projects requiring third-party financing or long operational horizons.

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


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Source: https://comparepv.com/ja-solar-vs-runtech-china

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