JA Solar Review 2026
JA Solar manufactures 5 models across solar panels. Efficiency range 20.9%–22.6%.
Headquartered in China · Manufacturing in China
Founded 2005 by Jin Baofang · Headquartered in Beijing, China
Parent company: JA Solar Technology Co., Ltd.
Listed: SZ:002459
JA Solar at a glance
Certifications: IEC 61215 · IEC 61730 · UL 1703 · CEC Listed
Warranty: 12-yr product · 30-yr performance
Key milestones
- 2005 Founded in Hebei, China
- 2007 IPO on NASDAQ (JASO) - delisted 2018
- 2019 Relisted on Shenzhen Stock Exchange (002459)
- 2023 Launched DeepBlue 4.0 Pro with N-type TOPCon
Source: www.jasolar.com/html/en/about · Last updated 2026-05-27
JA Pros & Cons (data-driven)
+ Pros
- ✓ Average panel efficiency 21.7% exceeds industry baseline 21%
- ✓ Average product warranty 13.2yr exceeds industry baseline 12yr
- ✓ Low annual degradation 0.46%/yr (industry average ~0.5%/yr)
- ✓ 100% of SKUs triple-verified against manufacturer datasheets
− Cons
- ✗ Distributor and installer pricing varies — direct retail rarely available
- ✗ Some 2026 models depend on regional distributor availability
Pros and cons calculated against industry baselines: 21% panel efficiency, 12yr panel warranty, -0.32%/°C temp coeff, 90% battery RTE.
Current JA Solar Product List (5)
Solar Panels (5)
| Model | Wattage | Efficiency | Warranty | Verified | Score | Details |
|---|---|---|---|---|---|---|
| JAM78S30 590W | 590W | 22.6% | 15/30 yr | ✓ | 93 (A) | View → |
| DeepBlue 4.0 Pro 460W | 460W | 22.4% | 15/30 yr | ✓ | 92 (A) | View → |
| JAM54S31 415W | 415W | 21.5% | 12/25 yr | ✓ | 78 (B) | View → |
| JAM72S30 540W | 540W | 21.3% | 12/25 yr | ✓ | 77 (B) | View → |
| DeepBlue 3.0 400W | 400W | 20.9% | 12/25 yr | ✓ | 75 (B) | View → |
Spec Sheet Downloads
5 manufacturer-published datasheets available for JA Solar products. All links go to the official PDF on the manufacturer's website.
- PDF JA Solar DeepBlue 4.0 Pro 460W datasheet →https://www.jasolar.com/uploadfile/fujian/2024/1120/50da37384838dbe.pdf
- PDF JA Solar JAM72S30 540W datasheet →https://www.jasolar.com/uploadfile/2021/0706/20210706053524693.pdf
- PDF JA Solar JAM54S31 415W datasheet →https://www.jasolar.com/uploadfile/2023/0606/20230606021020430.pdf
- PDF JA Solar JAM78S30 590W datasheet →https://www.enfsolar.com/pv/panel-datasheet/crystalline/54940
- PDF JA Solar DeepBlue 3.0 400W datasheet →https://www.jasolar.com/uploadfile/2022/0928/20220928043341521.pdf
Recent JA News
SolarSpec does not republish third-party news. For the latest JA Solar news — product launches, financial filings, recalls, supply-chain updates — search Google News directly.
Search JA news on Google News →Related Brands
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Frequently Asked Questions
What is the SolarSpec Score for JA Solar?
JA Solar earns a SolarSpec Score of 83/100 (Grade B+) based on the weighted average of all 5 models in their 2026 lineup. The score combines efficiency, warranty, temperature coefficient, and verification status. See our /methodology/ page for the full formula.
How many solar products does JA Solar offer in 2026?
JA Solar offers 5 products in their 2026 lineup: 5 solar panels.
What is the most efficient JA Solar solar panel?
The most efficient JA Solar solar panel is the JAM78S30 590W at 22.6% efficiency with 590W output. JA Solar panels range from 20.9% to 22.6% efficiency across 5 models.
What warranty does JA Solar offer on solar panels?
JA Solar offers up to 15-year product warranty and up to 30-year performance warranty. Average annual degradation across the lineup is 0.46%.
Where are JA Solar solar panels manufactured?
JA Solar solar panels are manufactured in China.
Where can I download JA Solar datasheets?
We have direct manufacturer-published datasheet links for 5 of 5 JA Solar products. See the Spec Sheet Downloads section below for direct PDF links.
How we score brands
Every JA Solar model in our catalog is scored 0-100 using a transparent formula: efficiency (25 pts), product warranty (20 pts), performance warranty bonus (3 pts), temperature coefficient (12 pts), and datasheet verification (5 pts), on a 50-point baseline. The brand-level score is the simple average across all 5 models.
Read the full SolarSpec methodology →