--- title: "Q-Cells Q.TRON BLK M-G2.1+/AC (Power class 420W) vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675 - Solar Panel Comparison | ComparePV" description: "Compare Q-Cells Q.TRON BLK M-G2.1+/AC (Power class 420W) vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/hanwha-q-cells-america-inc-q-tron-blk-m-g2-1-ac-power-class-420w/q-cells-q-peak-duo-ml-g12s-3-bfg-675" updated: 2026-09-11 --- # Q-Cells Q.TRON BLK M-G2.1+/AC (Power class 420W) vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675 15 differences, and they point both ways The largest is temperature coefficient: 0.040 %/°C better in heat. 3 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Q-Cells Q.TRON BLK M-G2.1+/AC (Power class 420W)](https://comparepv.com/panel/hanwha-q-cells-america-inc-q-tron-blk-m-g2-1-ac-power-class-420w) | [Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675](https://comparepv.com/panel/q-cells-q-peak-duo-ml-g12s-3-bfg-675) | | Manufacturer | Q-Cells | Q-Cells | | Power | 420 Wp | 675 Wp | | Efficiency | 21.50 % | 21.70 % | | Technology | N-type | | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | TRON BLK M-G2.1+/AC (Power class 420W) | PEAK DUO ML-G12S.3 / BFG 675 | Difference | | --- | --- | --- | --- | | Temperature coefficient | -0.300 %/°C | -0.340 %/°C | +0.040 %/°C for TRON BLK M-G2.1+/AC (Power class 420W) | | Rated power | 420 Wp | 675 Wp | +255 W for PEAK DUO ML-G12S.3 / BFG 675 | | Performance warranty | 25 yrs | 30 yrs | +5 yrs for PEAK DUO ML-G12S.3 / BFG 675 | | Weight | 22.9 kg | 38.2 kg | -15.3 kg for TRON BLK M-G2.1+/AC (Power class 420W) | | Product warranty | 25 yrs | 12 yrs | +13 yrs for TRON BLK M-G2.1+/AC (Power class 420W) | | Annual degradation | 0.33 %/yr | 0.45 %/yr | -0.12 %/yr for TRON BLK M-G2.1+/AC (Power class 420W) | | Open-circuit voltage | 38.75 V | 45.74 V | 6.99 V apart | | Short-circuit current | 13.58 A | 18.45 A | 4.87 A apart | | Module area | 1.953 m² | 3.106 m² | 1.154 m² apart | | Module efficiency | 21.50 % | 21.70 % | +0.20 pp for PEAK DUO ML-G12S.3 / BFG 675 | | Voltage at max power | 32.54 V | 38.43 V | 5.89 V apart | | Current at max power | 12.91 A | 17.56 A | 4.65 A apart | | Cell count | 216 | 132 | 84 cells apart | | Bifacial | No | Yes | No vs Yes | | Dimensions | 1722x1134x40 mm | 2384x1303x35 mm | 1722x1134x40 mm vs 2384x1303x35 mm | ## Every compared parameter | Parameter | TRON BLK M-G2.1+/AC (Power class 420W) | PEAK DUO ML-G12S.3 / BFG 675 | | --- | --- | --- | | Rated power | 420 Wp | 675 Wp | | Module efficiency | 21.50 % | 21.70 % | | Power density | 215.1 Wp/m² | 217.3 Wp/m² | | Open-circuit voltage | 38.75 V | 45.74 V | | Voltage at max power | 32.54 V | 38.43 V | | Short-circuit current | 13.58 A | 18.45 A | | Current at max power | 12.91 A | 17.56 A | | Temperature coefficient | -0.300 %/°C | -0.340 %/°C | | Dimensions | 1722x1134x40 mm | 2384x1303x35 mm | | Module area | 1.953 m² | 3.106 m² | | Weight | 22.9 kg | 38.2 kg | | Weight per kWp | 54.6 kg/kWp | 56.6 kg/kWp | | Product warranty | 25 yrs | 12 yrs | | Performance warranty | 25 yrs | 30 yrs | | Annual degradation | 0.33 %/yr | 0.45 %/yr | | Cell technology | N-type | - | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 216 | 132 | | Bifacial | No | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year - **Cumulative output, TRON BLK M-G2.1+/AC (Power class 420W):** 14,170 kWh - **Cumulative output, PEAK DUO ML-G12S.3 / BFG 675:** 22,228 kWh - **Gap:** 8,058 kWh ## Output when hot | Condition | Cell temperature | TRON BLK M-G2.1+/AC (Power class 420W) | PEAK DUO ML-G12S.3 / BFG 675 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 420 W | 675 W | 100.0% of rated power | | Cool, bright day | 40 °C | 401 W | 641 W | 94.9% of rated power | | Typical summer roof | 55 °C | 382 W | 606 W | 89.8% of rated power | | Hot roof | 70 °C | 363 W | 572 W | 84.7% of rated power | ## Against the whole database | Measure | TRON BLK M-G2.1+/AC (Power class 420W) | PEAK DUO ML-G12S.3 / BFG 675 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #7,958 | #7,421 | 14,005 | PEAK DUO ML-G12S.3 / BFG 675 leads by 537 places | | Power density | #7,882 | #7,349 | 14,005 | PEAK DUO ML-G12S.3 / BFG 675 leads by 533 places | | Heat behaviour | #6,093 | #8,778 | 14,005 | TRON BLK M-G2.1+/AC (Power class 420W) leads by 2,685 places | | Weight | #9,019 | #10,738 | 14,005 | TRON BLK M-G2.1+/AC (Power class 420W) leads by 1,719 places | | Warranty | #9,798 | #21 | 14,005 | PEAK DUO ML-G12S.3 / BFG 675 leads by 9,777 places | | Overall | #9,518 | #2,198 | 14,005 | PEAK DUO ML-G12S.3 / BFG 675 leads by 7,320 places | ## Questions ### Which panel is better: Q-Cells Q.TRON BLK M-G2.1+/AC (Power class 420W) or Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675? According to our database: **Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675** has higher module efficiency (**21.70%** vs **21.50%**); **Q-Cells Q.TRON BLK M-G2.1+/AC (Power class **420 W**)** tolerates heat better (temp coeff **-0.300%/°C** vs **-0.340%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Q-Cells Q.TRON BLK M-G2.1+/AC (Power class 420W) and Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675? **Q-Cells Q.TRON BLK M-G2.1+/AC (Power class **420 W**)** has a module efficiency of **21.50%**, while **Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675** is **21.70%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Q-Cells Q.TRON BLK M-G2.1+/AC (Power class 420W) use vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675? **Q-Cells Q.TRON BLK M-G2.1+/AC (Power class **420 W**)** uses **N-type** cells; **Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675** uses Monocrystalline. Modern **n-type** technologies (**TOPCon**, **HJT**, BC) typically deliver higher efficiency and lower degradation compared to older **PERC** (p-type) cells. ### What is the warranty on Q-Cells Q.TRON BLK M-G2.1+/AC (Power class 420W) and Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675? **Q-Cells Q.TRON BLK M-G2.1+/AC (Power class **420 W**)** has a **25 years** power warranty; **Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675** has a **30 years** power warranty. The power warranty guarantees a minimum percentage of rated output at the end of the warranty period (typically 80**-87%**). Product (materials) warranties are usually shorter. ### Are Q-Cells Q.TRON BLK M-G2.1+/AC (Power class 420W) and Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675 bifacial panels? **Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675** is bifacial (captures light from both faces); **Q-Cells Q.TRON BLK M-G2.1+/AC (Power class **420 W**)** is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath. ## Related comparisons - [Q-Cells Q.TRON BLK M-G2.1+/AC (Power class 420W) vs Q-Cells Q.TRON BLK M-G2.H1+/AC (Power class 440W)](https://comparepv.com/compare/hanwha-q-cells-america-inc-q-tron-blk-m-g2-1-ac-power-class-420w/hanwha-q-cells-america-inc-q-tron-blk-m-g2-h1-ac-power-class-440w) - 5 differences, the largest is module efficiency - [Q-Cells Q.TRON BLK M-G2.1+/AC (Power class 420W) vs Q-Cells Q.TRON BLK M-G2.D1+/AC (Power class 435W)](https://comparepv.com/compare/hanwha-q-cells-america-inc-q-tron-blk-m-g2-1-ac-power-class-420w/hanwha-q-cells-america-inc-q-tron-blk-m-g2-d1-ac-power-class-435w) - 3 differences, the largest is module efficiency - [Q-Cells Q.TRON BLK M-G2.1+/AC (Power class 420W) vs Q-Cells Q.TRON BLK M-G2.C1+/AC (Power class 430W)](https://comparepv.com/compare/hanwha-q-cells-america-inc-q-tron-blk-m-g2-1-ac-power-class-420w/hanwha-q-cells-america-inc-q-tron-blk-m-g2-c1-ac-power-class-430w) - 3 differences, the largest is module efficiency - [Q-Cells Q.TRON BLK M-G2.1+/AC (Power class 420W) vs Q-Cells Q.TRON BLK M-G2.E1+/AC (Power class 425W)](https://comparepv.com/compare/hanwha-q-cells-america-inc-q-tron-blk-m-g2-1-ac-power-class-420w/hanwha-q-cells-america-inc-q-tron-blk-m-g2-e1-ac-power-class-425w) - One difference: module efficiency - [Q-Cells Q.TRON BLK M-G2.1+/AC (Power class 420W) vs Q-Cells Q.TRON BLK M-G2+/AC (Power class 415W)](https://comparepv.com/compare/hanwha-q-cells-america-inc-q-tron-blk-m-g2-1-ac-power-class-420w/hanwha-q-cells-america-inc-q-tron-blk-m-g2-ac-power-class-415w) - One difference: module efficiency - [Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675 vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 670](https://comparepv.com/compare/q-cells-q-peak-duo-ml-g12s-3-bfg-675/q-cells-q-peak-duo-ml-g12s-3-bfg-670) - The same specification on paper --- Source: https://comparepv.com/compare/hanwha-q-cells-america-inc-q-tron-blk-m-g2-1-ac-power-class-420w/q-cells-q-peak-duo-ml-g12s-3-bfg-675 Not in this file, on the page: the thirty-year yield curve year by year at a cell temperature you pick and a written summary generated on request.