--- title: "Just Solar vs Q-Cells - Brand Comparison | ComparePV" description: "Compare Just Solar vs Q-Cells solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background." source: "https://comparepv.com/just-solar-vs-q-cells" --- # Just Solar vs Q-Cells Q-Cells has the broader catalog (89 vs 42 models). Just Solar leads on peak efficiency at 23.82%. Q-Cells leans bifacial (39% of lineup). ## The two companies | Attribute | Just Solar | Q-Cells | | --- | --- | --- | | Country | | South Korea | | Headquarters | | Seoul | | Founded | | 1999 | | Employees | | 2000+ | | Annual capacity | | 11.2 GW/year | | Tier 1 | no | yes | | Listed | | NASDAQ: HQCL | | Website | | [https://www.qcells.com](https://www.qcells.com) | 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 | Just Solar | Q-Cells | Margin | | --- | --- | --- | --- | | Panel Models | 42 | 89 | +47 | | Max Power | 740 W | 675 W | +65 W | | Avg Power | 491 W | 468 W | +22 W | ## Efficiency | Measure | Just Solar | Q-Cells | Margin | | --- | --- | --- | --- | | Max Efficiency | 23.82% | 23.20% | +0.62 pp | | Avg Efficiency | 22.08% | 21.21% | +0.87 pp | ## Reliability & Warranty | Measure | Just Solar | Q-Cells | Margin | | --- | --- | --- | --- | | Avg Temp Coefficient | -0.306%/°C | -0.325%/°C | +0.018 | | Bifacial Share | 7 (17%) | 35 (39%) | +23 pp | | Avg Warranty | 28.5 yrs | 27.0 yrs | +1.5 yr | ## Efficiency distribution Just Solar skews to higher efficiency: 33% of lineup is 23%+ | Efficiency band | Just Solar | Q-Cells | | --- | --- | --- | | 20-21% | 8 (19.0%) | 29 (32.6%) | | 21-22% | 14 (33.3%) | 30 (33.7%) | | 22-23% | 6 (14.3%) | 21 (23.6%) | | 23%+ | 14 (33.3%) | 2 (2.2%) | | \<20% | 0 | 7 (7.9%) | ## Power distribution Q-Cells offers more 600W+ panels (19% of lineup) | Power band | Just Solar | Q-Cells | | --- | --- | --- | | \<400W | 7 (16.7%) | 20 (22.5%) | | 400-499W | 21 (50.0%) | 41 (46.1%) | | 500-599W | 7 (16.7%) | 11 (12.4%) | | 700W+ | 7 (16.7%) | 0 | | 600-699W | 0 | 17 (19.1%) | ## Cell technology Dominant cell tech: **TOPCon** (52%) Dominant cell tech: **PERC** (43%) | Technology | Just Solar | Q-Cells | | --- | --- | --- | | TOPCon | 22 (52.4%) | 8 (9.0%) | | Back Contact | 13 (31.0%) | 0 | | HJT | 7 (16.7%) | 0 | | PERC | 0 | 38 (42.7%) | | N-type | 0 | 23 (25.8%) | | Unknown | 0 | 20 (22.5%) | ## Top panels, Just Solar | # | Model | Power | Efficiency | Temp. coefficient | Technology | | --- | --- | --- | --- | --- | --- | | 1 | [JST-FCMH-740W-HD](https://comparepv.com/panel/just-solar-jst-fcmh-740w-hd) | 740 | 23.8 | -0.260 | Monocrystalline | | 2 | [JST-FCMH-735W-HD](https://comparepv.com/panel/just-solar-jst-fcmh-735w-hd) | 735 | 23.7 | -0.260 | Monocrystalline | | 3 | [JST-FCMH-730W-HD](https://comparepv.com/panel/just-solar-jst-fcmh-730w-hd) | 730 | 23.5 | -0.260 | Monocrystalline | | 4 | [JST-FCMH-725W-HD](https://comparepv.com/panel/just-solar-jst-fcmh-725w-hd) | 725 | 23.3 | -0.260 | Monocrystalline | | 5 | [JST-FCMH-720W-HD](https://comparepv.com/panel/just-solar-jst-fcmh-720w-hd) | 720 | 23.2 | -0.260 | Monocrystalline | | 6 | [JST-FCMH-715W-HD](https://comparepv.com/panel/just-solar-jst-fcmh-715w-hd) | 715 | 23.0 | -0.260 | Monocrystalline | | 7 | [JST-FCMH-710W-HD](https://comparepv.com/panel/just-solar-jst-fcmh-710w-hd) | 710 | 22.9 | -0.260 | Monocrystalline | | 8 | [JST-EBMH-560W-D](https://comparepv.com/panel/just-solar-jst-ebmh-560w-d) | 560 | 21.9 | -0.360 | Monocrystalline | | 9 | [JST-EBMH-555W-D](https://comparepv.com/panel/just-solar-jst-ebmh-555w-d) | 555 | 21.7 | -0.360 | Monocrystalline | | 10 | [JST-EBMH-550W-D](https://comparepv.com/panel/just-solar-jst-ebmh-550w-d) | 550 | 21.5 | -0.360 | 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 | ## Other comparisons - [Just Solar vs A.B. Energy](https://comparepv.com/just-solar-vs-a-b-energy) - [AE Solar vs Q-Cells](https://comparepv.com/ae-solar-vs-q-cells) - [Just Solar vs AEET](https://comparepv.com/just-solar-vs-aeet) - [AIKO vs Q-Cells](https://comparepv.com/aiko-vs-q-cells) - [Just Solar vs AKCOME](https://comparepv.com/just-solar-vs-akcome) - [ARTsolar vs Q-Cells](https://comparepv.com/artsolar-vs-q-cells) --- Source: https://comparepv.com/just-solar-vs-q-cells Not in this file, on the page: the distributions above drawn as charts.