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

# JA Solar vs SpolarPV

JA Solar has the broader catalog (504 vs 62 models). JA Solar leads on peak efficiency at 24.80%. JA Solar leans bifacial (47% of lineup).


## The two companies


| Attribute | JA Solar | SpolarPV |
| --- | --- | --- |
| Country | China | China |
| Headquarters | Beijing | Suzhou |
| 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) | [https://www.spolarpv.com](https://www.spolarpv.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 | SpolarPV | Margin |
| --- | --- | --- | --- |
| Panel Models | 504 | 62 | +442 |
| Max Power | 740 W | 700 W | +40 W |
| Avg Power | 456 W | 488 W | +32 W |


## Efficiency


| Measure | JA Solar | SpolarPV | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.80% | 22.86% | +1.94 pp |
| Avg Efficiency | 21.13% | 20.81% | +0.32 pp |


## Reliability & Warranty


| Measure | JA Solar | SpolarPV | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.322%/°C | -0.333%/°C | +0.011 |
| Bifacial Share | 238 (47%) | 17 (27%) | +20 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 | SpolarPV |
| --- | --- | --- |
| \<20% | 112 (22.2%) | 15 (24.2%) |
| 20-21% | 99 (19.6%) | 8 (12.9%) |
| 21-22% | 112 (22.2%) | 20 (32.3%) |
| 22-23% | 107 (21.2%) | 19 (30.6%) |
| 23%+ | 74 (14.7%) | 0 |


## Power distribution

SpolarPV offers more 600W+ panels (18% of lineup)


| Power band | JA Solar | SpolarPV |
| --- | --- | --- |
| \<400W | 142 (28.2%) | 16 (25.8%) |
| 400-499W | 173 (34.3%) | 13 (21.0%) |
| 500-599W | 120 (23.8%) | 22 (35.5%) |
| 600-699W | 60 (11.9%) | 10 (16.1%) |
| 700W+ | 9 (1.8%) | 1 (1.6%) |


## Cell technology

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

Dominant cell tech: **PERC** (48%)


| Technology | JA Solar | SpolarPV |
| --- | --- | --- |
| PERC | 247 (49.0%) | 30 (48.4%) |
| TOPCon | 146 (29.0%) | 28 (45.2%) |
| N-type | 90 (17.9%) | 0 |
| Unknown | 16 (3.2%) | 0 |
| HJT | 5 (1.0%) | 0 |
| BIPV | 0 | 4 (6.5%) |


## 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, SpolarPV


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [SPV700-TG12-132BD](https://comparepv.com/panel/spolarpv-spv700-tg12-132bd) | 700 | 22.6 | -0.300 | Monocrystalline |
| 2 | [SPV695-TG12-132BD](https://comparepv.com/panel/spolarpv-spv695-tg12-132bd) | 695 | 22.4 | -0.300 | Monocrystalline |
| 3 | [SPV690-TG12-132BD](https://comparepv.com/panel/spolarpv-spv690-tg12-132bd) | 690 | 22.2 | -0.300 | Monocrystalline |
| 4 | [SPV685-TG12-132BD](https://comparepv.com/panel/spolarpv-spv685-tg12-132bd) | 685 | 22.1 | -0.300 | Monocrystalline |
| 5 | [SPV680-TG12-132BD](https://comparepv.com/panel/spolarpv-spv680-tg12-132bd) | 680 | 21.9 | -0.300 | Monocrystalline |
| 6 | [SPV675-TG12-132BD](https://comparepv.com/panel/spolarpv-spv675-tg12-132bd) | 675 | 21.8 | -0.300 | Monocrystalline |
| 7 | [SPV670-TG12-132BD](https://comparepv.com/panel/spolarpv-spv670-tg12-132bd) | 670 | 21.6 | -0.300 | Monocrystalline |
| 8 | [SPV665-TG12-132BD](https://comparepv.com/panel/spolarpv-spv665-tg12-132bd) | 665 | 21.4 | -0.300 | Monocrystalline |
| 9 | [SPV660-TG12-132BD](https://comparepv.com/panel/spolarpv-spv660-tg12-132bd) | 660 | 21.3 | -0.300 | Monocrystalline |
| 10 | [SP605HM6-60L](https://comparepv.com/panel/spolarpv-sp605hm6-60l) | 605 | 21.4 | -0.340 | Monocrystalline |


## Summary

JA Solar and SpolarPV are both Chinese solar module manufacturers, but they occupy very different positions in the global market. JA Solar was founded in 2005, employs over 37,000 people, and operates with a production capacity exceeding 100 GW per year, making it one of the largest module manufacturers in the world. The company holds Tier 1 bankable status as recognized by S&P Global Commodity Insights and jointly topped Wood Mackenzie's Global Solar Module Manufacturer Ranking for H1 2025 - a strong signal of financial stability and institutional trust. SpolarPV, by contrast, is a much smaller producer that does not hold Tier 1 status, with a product catalog of 64 panel models compared to JA Solar's 524. Both manufacturers lead with PERC cell technology (52.1% and 46.9% of their respective portfolios), with TOPCon products rounding out the offering in both cases. JA Solar's maximum module power reaches 740 Wp with a peak efficiency of 24.4%, while SpolarPV's top module reaches 700 Wp and 22.86% efficiency.

JA Solar's broad portfolio, large bifacial share (44.3% of its lineup), and better average temperature coefficient (-0.3226%/°C versus -0.3353%/°C for SpolarPV) make it well suited for a wide range of applications - from residential rooftop installs to utility-scale ground-mount farms and commercial C&I projects where bankability is required for project finance. SpolarPV posts a marginally higher average module power (465.9 Wp versus 441.7 Wp) and slightly higher average efficiency (21.1% versus 20.9%), which may reflect a more compact, higher-wattage product focus within its smaller catalog. SpolarPV's dual-glass and bifacial offerings position it for niche commercial and agricultural applications, though its limited independent review history and non-Tier-1 status require buyers to exercise more due diligence.

For international buyers choosing between the two, JA Solar is the lower-risk option in virtually every scenario involving external financing, long-term energy yield guarantees, or institutional procurement. SpolarPV may appeal to cost-sensitive buyers in direct-purchase scenarios where Tier 1 bankability is not a contractual requirement, but the gap in scale, track record, and independent validation is significant and should be weighed carefully before committing to larger volumes.

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


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

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