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

# JA Solar vs Solar Power Vietnam

JA Solar has the broader catalog (504 vs 5 models). JA Solar leads on peak efficiency at 24.80%. Solar Power Vietnam leans bifacial (100% of lineup).


## The two companies


| Attribute | JA Solar | Solar Power Vietnam |
| --- | --- | --- |
| Country | China | Vietnam |
| Headquarters | Beijing |  |
| Founded | 2005 |  |
| Employees | 37,289 |  |
| Annual capacity | 100+ GW/year |  |
| Tier 1 | yes | no |
| Listed | SZSE: 002459 |  |
| Website | [https://www.jasolar.com](https://www.jasolar.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 | Solar Power Vietnam | Margin |
| --- | --- | --- | --- |
| Panel Models | 504 | 5 | +499 |
| Max Power | 740 W | 735 W | +5 W |
| Avg Power | 456 W | 725 W | +269 W |


## Efficiency


| Measure | JA Solar | Solar Power Vietnam | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.80% | 22.90% | +1.90 pp |
| Avg Efficiency | 21.13% | 22.58% | +1.45 pp |


## Reliability & Warranty


| Measure | JA Solar | Solar Power Vietnam | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.322%/°C | - |  |
| Bifacial Share | 238 (47%) | 5 (100%) | +53 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 | Solar Power Vietnam |
| --- | --- | --- |
| \<20% | 112 (22.2%) | 0 |
| 20-21% | 99 (19.6%) | 0 |
| 21-22% | 112 (22.2%) | 0 |
| 22-23% | 107 (21.2%) | 5 (100.0%) |
| 23%+ | 74 (14.7%) | 0 |


## Power distribution

Solar Power Vietnam offers more 600W+ panels (100% of lineup)


| Power band | JA Solar | Solar Power Vietnam |
| --- | --- | --- |
| \<400W | 142 (28.2%) | 0 |
| 400-499W | 173 (34.3%) | 0 |
| 500-599W | 120 (23.8%) | 0 |
| 600-699W | 60 (11.9%) | 0 |
| 700W+ | 9 (1.8%) | 5 (100.0%) |


## Cell technology

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

Dominant cell tech: **TOPCon** (100%)


| Technology | JA Solar | Solar Power Vietnam |
| --- | --- | --- |
| PERC | 247 (49.0%) | 0 |
| TOPCon | 146 (29.0%) | 5 (100.0%) |
| N-type | 90 (17.9%) | 0 |
| Unknown | 16 (3.2%) | 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, Solar Power Vietnam


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [SPV735-66SN210](https://comparepv.com/panel/solar-power-vietnam-spv735-66sn210) | 735 | 22.9 | - | Monocrystalline |
| 2 | [SPV730-66SN210](https://comparepv.com/panel/solar-power-vietnam-spv730-66sn210) | 730 | 22.7 | - | Monocrystalline |
| 3 | [SPV725-66SN210](https://comparepv.com/panel/solar-power-vietnam-spv725-66sn210) | 725 | 22.6 | - | Monocrystalline |
| 4 | [SPV720-66SN210](https://comparepv.com/panel/solar-power-vietnam-spv720-66sn210) | 720 | 22.4 | - | Monocrystalline |
| 5 | [SPV715-66SN210](https://comparepv.com/panel/solar-power-vietnam-spv715-66sn210) | 715 | 22.3 | - | Monocrystalline |


## Summary

JA Solar was founded in 2005 and is headquartered in China, listed on the Shenzhen Stock Exchange (SZSE). With a workforce exceeding 37,000 employees and a production capacity of over 100 GW, the company ranks among the largest solar module manufacturers in the world, consistently placing near the top in global annual shipments. JA Solar holds Tier 1 bankable status, reflecting its financial stability and the confidence that lending institutions place in its long-term viability as a supplier - a critical consideration for project finance. Its portfolio spans 524 panel models, with PERC technology accounting for over 52% of the lineup, and an average module efficiency of approximately 20.9% reaching up to 24.4% in flagship products. Solar Power Vietnam is a Vietnamese manufacturer that does not hold Tier 1 bankable status and operates with a considerably narrower product portfolio of just 5 modules. However, its entire lineup is built on TOPCon cell technology and all panels feature a bifacial design, resulting in a notably higher average efficiency of 22.58% compared to 20.87% for JA Solar. The average panel output stands at 725 Wp and the maximum reaches 735 Wp, indicating a strategy focused exclusively on premium, high-performance products.

In terms of practical applications, JA Solar's breadth of portfolio and proven global track record make it well suited to the full spectrum of installations - from residential rooftop systems and commercial C&I projects to large utility-scale ground-mount plants. Its Tier 1 status is particularly relevant for project finance scenarios where lenders require bankable equipment from a vetted supplier. The average warranty across its portfolio is approximately 27.9 years, and a temperature coefficient of Pmax averaging -0.32%/°C is well within comfortable ranges for temperate climates. Solar Power Vietnam's technically advanced but narrow portfolio positions it as a niche option for projects where maximum efficiency per square meter is critical - such as space-constrained commercial rooftop installations or C&I applications seeking premium bifacial TOPCon performance. Its 30-year average warranty is a notable strength on paper, though it must be weighed against the absence of third-party bankability validation.

For international buyers comparing the two, JA Solar is the lower-risk choice for most applications - its Tier 1 status, extensive global references, and broad product availability significantly reduce procurement and project-financing risk. Solar Power Vietnam's all-TOPCon, all-bifacial lineup offers compelling efficiency figures and a longer stated warranty, but the absence of Tier 1 bankability and a very limited panel portfolio mean that thorough due diligence on its financial stability and warranty-backing capacity is essential before committing to any significant procurement volume.

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


---

Source: https://comparepv.com/ja-solar-vs-solar-power-vietnam

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