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Q-Cells vs Vespa Solar Enerji - solar panel manufacturer comparison

Q-Cells
South Korea Founded 1999 Tier 1
Read the Q-Cells review
VS
Vespa Solar Enerji
Turkey
Read the Vespa Solar Enerji review
At a glance

Q-Cells has the broader catalog (89 vs 9 models). Vespa Solar Enerji leads on peak efficiency at 23.32%. Vespa Solar Enerji leans bifacial (100% 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.

Panel models
89 9
Highest power
675 Wp 630 Wp
Best efficiency
23.2% 23.3%
Average efficiency
21.2% 21.3%
Bifacial share
39% 100%
Average warranty
27 yrs 30 yrs
01

The two companies

Company facts, not datasheet figures
Q-Cells

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+
Tier 1 bankable
Yes
Vespa Solar Enerji
Headquarters
Turkey
02

Catalogue against catalogue

Averages over every model in the database
Metric Q-Cells Vespa Solar Enerji
Catalog & Power
Panel Models 89+80 9
Max Power 675 W+45 W 630 W
Avg Power 468 W 514 W+46 W
Efficiency
Max Efficiency 23.20% 23.32%+0.12 pp
Avg Efficiency 21.21% 21.31%+0.10 pp
Reliability & Warranty
Avg Temp Coefficient -0.325%/°C+0.010 -0.334%/°C
Bifacial Share 35 (39%) 9 (100%)+61 pp
Avg Warranty 27.0 yrs 30.0 yrs+3.0 yr

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.

03

What each of them builds

Cell technology across the market
Efficiency spread
Share of each catalogue in every efficiency band

Vespa Solar Enerji skews to higher efficiency: 11% of lineup is 23%+

Power spread
Share of each catalogue in every power band

Q-Cells offers more 600W+ panels (19% of lineup)

Q-Cells cell technology
Share of their models by cell architecture

Dominant cell tech: <strong>PERC</strong> (43%)

Vespa Solar Enerji cell technology
Share of their models by cell architecture

Dominant cell tech: <strong>PERC</strong> (89%)

04

The flagships

Highest-power models from each brand
05

Written summary

Checking cache...

Q-Cells, originally founded in Germany in 1999 and acquired by South Korean conglomerate Hanwha Group in 2012, operates today as Hanwha Qcells with corporate headquarters in Seoul and a substantial U.S. manufacturing presence in Dalton, Georgia - the largest silicon module production site in the Western Hemisphere, with annual capacity reported at approximately 8.4 GW. The brand holds confirmed Bloomberg NEF Tier 1 status, reflecting strong bankability and the financial depth of the Hanwha parent. Vespa Solar Enerji is a Turkish manufacturer based in Hacılar, Kayseri, operating from within an organized industrial zone; while ENF Solar lists the company with panel datasheets, no independent source confirms Tier 1 bankability or documents the company's aggregate annual production scale. On institutional footprint, Q-Cells holds an unambiguous advantage.

Q-Cells fields two principal panel families for the residential and light-commercial segment: the Q.TRON line, which uses N-type TOPCon cells and reaches efficiencies of up to 22.5%, and the Q.PEAK DUO line, based on PERC technology, which targets budget-conscious residential buyers. Both carry 25-year product warranties and EPEAT sustainability certification. The brand also supplies utility-scale projects. Vespa Solar Enerji's confirmed product range, per ENF Solar datasheets, covers high-wattage crystalline PERC and bifacial modules in the 445-555 Wp band, which suggests a commercial or utility orientation rather than residential rooftop focus, though independent performance reviews in English are essentially absent.

For a typical buyer in 2025 - whether a homeowner, commercial developer, or project financier - Q-Cells is the safer default: it offers documented bankability, a wide product portfolio with confirmed next-generation cell technology, and broad installer network coverage across North America and Europe. Vespa Solar Enerji may be a viable option for regionally sourced projects in Turkey or adjacent markets, but the absence of Tier 1 recognition and third-party reviews makes independent due diligence essential before specifying it on any project with long-term warranty reliance.

Generated by Claude Sonnet · 2026-06-21

06

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Something missing from a catalogue? Both lists are built from the datasheets in the database. If a model is absent, it has not been ingested yet.

Shop prices: See 25 Q-Cells offers

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.