--- title: "Bisol vs Q-Cells - Brand Comparison | ComparePV" description: "Compare Bisol vs Q-Cells solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background." source: "https://comparepv.com/bisol-vs-q-cells" --- # Bisol vs Q-Cells Q-Cells has the broader catalog (89 vs 12 models). Bisol leads on peak efficiency at 23.50%. Q-Cells leans bifacial (39% of lineup). ## The two companies | Attribute | Bisol | Q-Cells | | --- | --- | --- | | Country | Slovenia | South Korea | | Headquarters | Prebold | Seoul | | Founded | 2004 | 1999 | | Employees | 200-500 | 2000+ | | Annual capacity | \<1 GW/year | 11.2 GW/year | | Tier 1 | no | yes | | Listed | | NASDAQ: HQCL | | Website | [https://www.bisol.com](https://www.bisol.com) | [https://www.qcells.com](https://www.qcells.com) | BISOL Group is a European manufacturer of high-quality photovoltaic modules headquartered in Prebold, Slovenia. Founded in 2004, it is considered Europe's leading authentic solar module producer with a production capacity of 750 MW and products distributed in over 120 countries. The company operates debt-free and has... 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... ## Catalog & Power | Measure | Bisol | Q-Cells | Margin | | --- | --- | --- | --- | | Panel Models | 12 | 89 | +77 | | Max Power | 580 W | 675 W | +95 W | | Avg Power | 475 W | 468 W | +7 W | ## Efficiency | Measure | Bisol | Q-Cells | Margin | | --- | --- | --- | --- | | Max Efficiency | 23.50% | 23.20% | +0.30 pp | | Avg Efficiency | 21.75% | 21.21% | +0.54 pp | ## Reliability & Warranty | Measure | Bisol | Q-Cells | Margin | | --- | --- | --- | --- | | Avg Temp Coefficient | -0.291%/°C | -0.325%/°C | +0.034 | | Bifacial Share | 1 (8%) | 35 (39%) | +31 pp | | Avg Warranty | 29.6 yrs | 27.0 yrs | +2.6 yr | ## Efficiency distribution Bisol skews to higher efficiency: 33% of lineup is 23%+ | Efficiency band | Bisol | Q-Cells | | --- | --- | --- | | \<20% | 2 (16.7%) | 7 (7.9%) | | 20-21% | 1 (8.3%) | 29 (32.6%) | | 22-23% | 5 (41.7%) | 21 (23.6%) | | 23%+ | 4 (33.3%) | 2 (2.2%) | | 21-22% | 0 | 30 (33.7%) | ## Power distribution Q-Cells offers more 600W+ panels (19% of lineup) | Power band | Bisol | Q-Cells | | --- | --- | --- | | \<400W | 2 (16.7%) | 20 (22.5%) | | 400-499W | 4 (33.3%) | 41 (46.1%) | | 500-599W | 6 (50.0%) | 11 (12.4%) | | 600-699W | 0 | 17 (19.1%) | ## Cell technology Dominant cell tech: **PERC** (58%) Dominant cell tech: **PERC** (43%) | Technology | Bisol | Q-Cells | | --- | --- | --- | | PERC | 7 (58.3%) | 38 (42.7%) | | TOPCon | 5 (41.7%) | 8 (9.0%) | | N-type | 0 | 23 (25.8%) | | Unknown | 0 | 20 (22.5%) | ## Top panels, Bisol | # | Model | Power | Efficiency | Temp. coefficient | Technology | | --- | --- | --- | --- | --- | --- | | 1 | [BGO 580](https://comparepv.com/panel/bisol-bgo-580) | 580 | 23.5 | -0.290 | Monocrystalline | | 2 | [BGO 570](https://comparepv.com/panel/bisol-bgo-570) | 570 | 23.1 | -0.290 | Monocrystalline | | 3 | [BGO 560](https://comparepv.com/panel/bisol-bgo-560) | 560 | 22.7 | -0.290 | Monocrystalline | | 4 | [BBO 520](https://comparepv.com/panel/bisol-bbo-520) | 520 | 23.2 | -0.290 | Monocrystalline | | 5 | [BBO 510](https://comparepv.com/panel/bisol-bbo-510) | 510 | 22.8 | -0.290 | Monocrystalline | | 6 | [BBO 500](https://comparepv.com/panel/bisol-bbo-500) | 500 | 22.3 | -0.290 | Monocrystalline | | 7 | [BDO 460](https://comparepv.com/panel/bisol-bdo-460) | 460 | 23.0 | -0.290 | Monocrystalline | | 8 | [BDO 450](https://comparepv.com/panel/bisol-bdo-450) | 450 | 22.5 | -0.290 | Monocrystalline | | 9 | [BDO 440](https://comparepv.com/panel/bisol-bdo-440) | 440 | 22.0 | -0.290 | Monocrystalline | | 10 | [BDO 410](https://comparepv.com/panel/bisol-bdo-410) | 410 | 20.5 | -0.290 | Monocrystalline | ## Top panels, Q-Cells | # | Model | Power | Efficiency | Temp. coefficient | Technology | | --- | --- | --- | --- | --- | --- | | 1 | [Q.PEAK DUO ML-G12S.3 / BFG 675](https://comparepv.com/panel/q-cells-q-peak-duo-ml-g12s-3-bfg-675) | 675 | 21.7 | -0.340 | Monocrystalline | | 2 | [Q.PEAK DUO ML-G12S.3 / BFG 670](https://comparepv.com/panel/q-cells-q-peak-duo-ml-g12s-3-bfg-670) | 670 | 21.6 | -0.340 | Monocrystalline | | 3 | [Q.PEAK DUO ML-G12S.3 / BFG 665](https://comparepv.com/panel/q-cells-q-peak-duo-ml-g12s-3-bfg-665) | 665 | 21.4 | -0.340 | Monocrystalline | | 4 | [Q.PEAK DUO ML-G12S.3 / BFG 660](https://comparepv.com/panel/q-cells-q-peak-duo-ml-g12s-3-bfg-660) | 660 | 21.2 | -0.340 | Monocrystalline | | 5 | [Q.PEAK DUO ML-G12S.3 / BFG 655](https://comparepv.com/panel/q-cells-q-peak-duo-ml-g12s-3-bfg-655) | 655 | 21.1 | -0.340 | Monocrystalline | | 6 | [Q.PEAK DUO ML-G12S.3 / BFG 650](https://comparepv.com/panel/q-cells-q-peak-duo-ml-g12s-3-bfg-650) | 650 | 20.9 | -0.340 | Monocrystalline | | 7 | [Q.TRON XL-G2.3 / BFG 645](https://comparepv.com/panel/q-cells-q-tron-xl-g2-3-bfg-645) | 645 | 23.1 | -0.290 | Monocrystalline | | 8 | [Q.TRON XL-G2.3 / BFG 640](https://comparepv.com/panel/q-cells-q-tron-xl-g2-3-bfg-640) | 640 | 22.9 | -0.290 | Monocrystalline | | 9 | [Q.TRON XL-G2.3 / BFG 635](https://comparepv.com/panel/hanwha-q-cells-america-inc-q-tron-xl-g2-3-bfg-635) | 635 | 22.7 | -0.300 | Monocrystalline | | 10 | [Q.TRON XL-G2.3 / BFG 630](https://comparepv.com/panel/hanwha-q-cells-america-inc-q-tron-xl-g2-3-bfg-630) | 630 | 22.6 | -0.300 | Monocrystalline | ## Summary Bisol is a Slovenian manufacturer founded in 2004 and headquartered in Prebold, Slovenia. It is widely cited as Europe's largest authentic PV module producer, with an annual production capacity of approximately 750 MW - a figure supported by reporting on the company's planned capacity expansion through a new Slovenian plant scheduled to begin production by late 2027. Bisol is not explicitly listed on the BloombergNEF Tier 1 panel but is considered a bankable, established European brand. Q-Cells, by contrast, is a brand with German engineering roots - originally founded in Germany in 1999 - now owned by South Korean conglomerate Hanwha Group since 2012. Hanwha Qcells holds confirmed BloombergNEF Tier 1 status and has been named an S&P Global 2025 Tier 1 Cleantech company. Its global module production capacity stands at roughly 11 GW per year, with major manufacturing in South Korea, Malaysia, and a large US facility in Cartersville, Georgia. On institutional footprint and scale, Q-Cells is in a different league. Bisol targets the premium European residential and commercial rooftop segment, emphasizing European design and manufacturing as quality differentiators. The company has adopted TOPCon cell technology in part of its lineup and markets a 30-year product warranty as a headline offer. Q-Cells serves a broader market - residential rooftops in the US and Europe, mid-scale commercial, and increasingly utility-adjacent projects - through product families like Q.PEAK DUO and Q.TRON, the latter using the proprietary Q.ANTUM passivation approach and reaching efficiency ratings that SolarReviews and EnergySage place among the best available in the residential segment. For most buyers outside Europe, Q-Cells is the more practical default: wider installer network, deeper warranty support infrastructure, and consistent Tier 1 bankability. Bisol is a credible premium choice for European rooftop projects where locally manufactured panels carry regulatory or financing advantages, but it cannot match Q-Cells in global reach or institutional backing. \---LINKS--- \- https://comparepv.com/reviews/bisol \| Bisol Solar Panels Review 2026 - Pros, Cons and Specs \| review \- https://balkangreenenergynews.com/solar-module-maker-bisol-to-triple-production-capacity-with-new-slovenian-plant/ \| Bisol to triple production capacity with new Slovenian plant \| article \- https://www.solarreviews.com/blog/hanwha-q-cells-solar-panels-complete-review \| Expert Review of Qcells Solar Panels for 2025 - SolarReviews \| review \- https://www.energysage.com/solar/best-solar-panels-complete-ranking/q-cells-solar-panels-complete-review/ \| Q CELLS Solar Panels - The Complete Review - EnergySage \| review \- https://www.hanwha.com/newsroom/news/press-releases/hanwha-qcells-named-an-s-p-global-2025-tier-1-cleantech-company.do \| Hanwha Qcells named 2025 S&P Global Tier 1 Cleantech company \| article Sources: \- \[Bisol Solar Panels Review 2026 - ComparePV\](https://comparepv.com/reviews/bisol) \- \[Bisol to triple production capacity - Balkan Green Energy News\](https://balkangreenenergynews.com/solar-module-maker-bisol-to-triple-production-capacity-with-new-slovenian-plant/) \- \[Expert Review of Qcells Solar Panels - SolarReviews\](https://www.solarreviews.com/blog/hanwha-q-cells-solar-panels-complete-review) \- \[Q CELLS Solar Panels Complete Review - EnergySage\](https://www.energysage.com/solar/best-solar-panels-complete-ranking/q-cells-solar-panels-complete-review/) \- \[Hanwha Qcells named 2025 S&P Global Tier 1 Cleantech company\](https://www.hanwha.com/newsroom/news/press-releases/hanwha-qcells-named-an-s-p-global-2025-tier-1-cleantech-company.do) Written by claude-sonnet from the figures above. ## Other comparisons - [Bisol vs A.B. Energy](https://comparepv.com/bisol-vs-a-b-energy) - [AE Solar vs Q-Cells](https://comparepv.com/ae-solar-vs-q-cells) - [Bisol vs AEET](https://comparepv.com/bisol-vs-aeet) - [AIKO vs Q-Cells](https://comparepv.com/aiko-vs-q-cells) - [Bisol vs AKCOME](https://comparepv.com/bisol-vs-akcome) - [ARTsolar vs Q-Cells](https://comparepv.com/artsolar-vs-q-cells) --- Source: https://comparepv.com/bisol-vs-q-cells Not in this file, on the page: the distributions above drawn as charts.