GCL vs Resun Solar - solar panel manufacturer comparison
Resun Solar has the broader catalog (236 vs 232 models). GCL leads on peak efficiency at 24.50%. GCL leans bifacial (65% 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
GCL is a global company focusing on green energy and high-efficiency photovoltaic materials. They are known for their innovation in polysilicon and wafer technologies, with a focus on low-carbon solutions. GCL is committed to building a low-carbon PV value chain and advancing global clean energy transformation.
- Founded
- 1990
- Headquarters
- Suzhou/Hong Kong, China
- Annual capacity
- 30+ GW/year
- Employees
- 6000+
- Tier 1 bankable
- Yes
Resun Solar Energy Co., Ltd. specializes in developing and manufacturing high-quality, cost-effective photovoltaic solar modules. With factories accredited by ISO9001 & 14001, their panels are certified by TUV, IEC61215, IEC61730, and other international quality systems. The company's sales network spans over 80...
- Founded
- 2007
- Headquarters
- Suzhou, China
- Annual capacity
- 1 GW/year
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
GCL skews to higher efficiency: 28% of lineup is 23%+
GCL offers more 600W+ panels (44% of lineup)
Dominant cell tech: <strong>TOPCon</strong> (47%)
Dominant cell tech: <strong>TOPCon</strong> (66%)
The flagships
Written summary
GCL is the brand under which the Chinese GCL Group - one of the world's largest producers of polysilicon and granular silicon (FBR) technology - sells solar modules, and its subsidiary GCL System Integration (GCL-SI) has held BloombergNEF Tier 1 bankability status since 2016, meaning its modules have been used in multiple non-recourse bank-financed projects. GCL-SI's module manufacturing capacity is estimated at around 29-30 GW per year, placing it among the significant global suppliers, though still smaller than top-tier players like Jinko or LONGi. Resun Solar, by contrast, is a considerably smaller Chinese manufacturer headquartered in Suzhou with factories in Changzhou, operating since the mid-2000s, with claimed annual capacity ranging from roughly 1 GW to 5 GW depending on the source; no independent BloombergNEF Tier 1 confirmation for Resun Solar could be found. In terms of institutional footprint and financing track record, GCL has a clear edge over Resun Solar.
Backed by its parent group's integrated supply chain spanning cells, modules and raw materials, GCL offers a broad product range covering residential rooftop, commercial and industrial, and utility-scale ground-mount applications, and appears more frequently in larger commercial projects internationally, including Europe. Resun Solar's lineup is centered on TOPCon-based modules across a wide power range, certified to TUV, IEC and UL standards, and is typically positioned toward smaller rooftop and export markets across more than 20 countries, without the same depth of bank-financing references as GCL.
For a typical buyer, especially one needing bank financing or strong long-term warranty backing, GCL is the safer default choice given its confirmed Tier 1 status and larger production scale. Resun Solar can be a reasonable value option for smaller residential installations, but buyers should verify local distributor support and warranty terms more carefully, since its market position is far less documented.
Generated by Claude Sonnet 5 · 2026-08-01
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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.