Heckert Solar vs Resun Solar - solar panel manufacturer comparison
Resun Solar has the broader catalog (236 vs 155 models). Heckert Solar leads on peak efficiency at 24.30%. Heckert Solar leans bifacial (42% 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
Heckert Solar is a German company based in Chemnitz, Saxony, specializing in the development, production and distribution of solar modules. Founded in 1992, the company has become a leading supplier of photovoltaic products, serving customers in over 120 countries. They manufacture high-quality, durable, and efficient...
- Founded
- 1992
- Headquarters
- Chemnitz, Germany
- Annual capacity
- 0.8 GW/year
- Employees
- 201
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
Heckert Solar skews to higher efficiency: 17% of lineup is 23%+
Resun Solar offers more 600W+ panels (29% of lineup)
Dominant cell tech: <strong>TOPCon</strong> (34%)
Dominant cell tech: <strong>TOPCon</strong> (66%)
The flagships
Written summary
Heckert Solar is a German module manufacturer headquartered in Chemnitz, producing panels exclusively in Germany since the early 2000s, with a plant in Langenwetzendorf running at roughly 400 MW annually that is slated for expansion into the multi-gigawatt range as part of a broader domestic manufacturing consortium. Resun Solar, by contrast, is a Chinese manufacturer founded in 2005, operating two production bases in Jiangsu province with annual capacity around 3 GW, and holding IEC, TUV and VDE certifications along with Chubb insurance backing on its output. On raw manufacturing scale Resun has the stronger footprint, while Heckert Solar's advantage lies in being a fully domestic European producer, which can matter for buyers with local-content or supply-chain requirements.
Heckert Solar's lineup centers on n-type TOPCon cells, including its bifacial glass-glass Zeus series rated for mechanical loads up to 8,100 Pa, aimed at residential rooftops, commercial roof arrays, and ground-mount or agri-PV installations. Resun Solar has likewise moved its portfolio toward TOPCon technology, offering large-format 210mm modules reaching up to 720 W for utility-scale and ground-mount projects, alongside a residential-oriented range in the 380-460 W bracket. Both brands advertise performance warranties extending up to 30 years, putting them on comparable footing in terms of long-term guarantees.
For a typical international buyer, Heckert Solar suits projects that prioritize European manufacturing provenance and premium brand positioning, such as residential or commercial installations in the EU. Resun Solar is generally the more cost-competitive option for large ground-mount or utility-scale deployments where production scale and unit economics dominate the decision. Since both rely on comparable TOPCon cell technology, the choice between them often comes down to sourcing logistics and budget rather than a meaningful gap in underlying panel technology.
Generated by Claude Sonnet 5 · 2026-08-17
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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.