Q-Cells vs Sonnen - solar panel manufacturer comparison
Q-Cells has the broader catalog (89 vs 0 models). Q-Cells leans bifacial (39% 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
Qcells is a renowned global provider of complete energy solutions, specializing in solar cells and modules, energy storage solutions, downstream project business, and energy retail. The company has a strong heritage dating back to its foundation in Germany and has become a leader in technology innovations. As an...
- Founded
- 1999
- Headquarters
- Seoul, South Korea
- Annual capacity
- 11.2 GW/year
- Employees
- 2000+
- Listed
- NASDAQ: HQCL
- Tier 1 bankable
- Yes
Sonnen is a German energy storage technology company specializing in intelligent home battery systems, most notably the sonnenBatterie — the world's first all-in-one lithium-ion home battery system commercially available. The company also develops virtual power plant (VPP) solutions and energy community platforms...
- Founded
- 2010
- Headquarters
- Wildpoldsried, Germany
- Employees
- 1000-2000
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
Q-Cells skews to higher efficiency: 2% of lineup is 23%+
Q-Cells offers more 600W+ panels (19% of lineup)
Dominant cell tech: <strong>PERC</strong> (43%)
The flagships
Written summary
Q-Cells, now officially branded Hanwha Q CELLS, is a solar panel manufacturer headquartered in Thalheim, Germany, operating under South Korea's Hanwha Group following an acquisition in 2012. It holds Bloomberg NEF Tier 1 status - confirming strong bankability and financial backing - and has expanded heavily into US manufacturing, with facilities in Dalton and Cartersville, Georgia that together represent several gigawatts of annual module capacity. Anticipated total shipments were reported to exceed 9 GW in 2025, placing it firmly among the top-tier global module suppliers by volume. Sonnen, by contrast, is a German energy storage company founded in 2010 and headquartered in Wildpoldsried, Germany; it was fully acquired by Shell in 2019. Sonnen does not manufacture solar panels at all - it produces residential battery systems (the sonnenBatterie, sonnenCore+, and sonnenEvo lines). In terms of institutional footprint for panel supply, Q-Cells is the clear incumbent.
Q-Cells' core product families - the Q.PEAK DUO and Q.TRON series - target premium residential rooftops and light commercial installations. The company's proprietary Q.ANTUM technology is PERC-based, and the company has publicly announced development roadmaps for TOPCon and perovskite-silicon tandem cells (achieving a reported 28.6% efficiency record on a tandem cell in late 2024). Efficiency ratings for current commercial modules sit in the 20-22.5% range. Sonnen's products sit in a different category entirely: its LFP-chemistry home batteries integrate with any solar array and are positioned as a premium behind-the-meter storage solution, with installed costs typically in the $12,000-$18,000 range for a single 10 kWh unit and a 10,000-cycle warranty.
For a buyer sourcing solar modules, Sonnen is simply not a relevant alternative to Q-Cells - they address different parts of a solar system. A buyer building a residential solar-plus-storage setup in 2025 would evaluate Q-Cells for the generation side and could consider Sonnen as one battery option (alongside Enphase, Tesla Powerwall, or Franklin WH) for the storage side. Q-Cells is the stronger default for panel procurement given its Tier 1 status, US domestic manufacturing eligibility, and broad installer network.
Generated by Claude Sonnet · 2026-06-12
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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.