JA Solar vs QSun Solar - solar panel manufacturer comparison
JA Solar has the broader catalog (504 vs 0 models). JA Solar leans bifacial (47% of lineup).
Both catalogues are read from the manufacturers' own datasheets. A brand is not scored against the market here, only against the other brand on this page.
The two companies
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...
- Founded
- 2005
- Headquarters
- Beijing, China
- Annual capacity
- 100+ GW/year
- Employees
- 37,289
- Listed
- SZSE: 002459
- Tier 1 bankable
- Yes
Catalogue against catalogue
An average over a catalogue describes the range a manufacturer publishes, not the module you would buy. A brand with two flagship panels and eighty older ones averages worse than one that has retired its back catalogue.
What each of them builds
JA Solar skews to higher efficiency: 15% of lineup is 23%+
JA Solar offers more 600W+ panels (14% of lineup)
Dominant cell tech: <strong>PERC</strong> (49%)
The flagships
Written summary
JA Solar was founded in 2005 in China and has grown into one of the world's leading solar module manufacturers, employing over 37,000 people and maintaining a production capacity exceeding 100 GW. The company holds Tier 1 bankable status from S&P Global Commodity Insights, is listed on the Shenzhen Stock Exchange, and jointly topped Wood Mackenzie's global solar module manufacturer ranking for H1 2025 - placing it alongside Jinko Solar, LONGi, and Trina Solar at the top of the industry. QSun Solar is a significantly smaller manufacturer without Tier 1 recognition, offering a portfolio of 35 modules with limited third-party reviews or independent performance data available in international markets.
JA Solar's 524-module portfolio spans a broad power range up to 740 Wp, with 44.3% of the lineup being bifacial, making it well suited for utility-scale ground-mount projects, commercial C&I rooftops, and residential installs alike. Average module power stands at 441.68 Wp, average efficiency at 20.87%, and the temperature coefficient of Pmax at -0.323%/°C is notably more favorable than QSun Solar's -0.366%/°C - an important advantage during peak summer output periods. Average product warranty across JA Solar's range reaches approximately 27.9 years. QSun Solar's portfolio, while narrower at 35 entirely monofacial modules, records a higher average power of 477.86 Wp and a maximum efficiency of 21.6%, with PERC technology covering 100% of its range. Its offering is best suited to straightforward residential rooftop installations where bifacial rear-side gain is not a priority and where the buyer values per-watt cost over bankability credentials.
For international buyers sourcing modules for project-financed utility-scale or commercial C&I deployments, JA Solar is the clear choice given its Tier 1 status, global supply chain resilience, deep and diverse product portfolio, and independently verified reliability - including PVEL Top Performer recognition in 2025. QSun Solar may appeal in small residential projects where financing requirements are absent and price sensitivity is high, but the lack of Tier 1 status and limited independent review coverage call for thorough due diligence before committing to a long-term installation.
Generated by Claude Sonnet · 2026-05-12
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Comparisons are computed from manufacturer datasheets held in the ComparePV database and may not reflect a brand's complete current lineup. Nothing on this page is paid placement.