--- title: "Q-Cells Q.TRON XL-G2.3 / BFG 620 vs Q-Cells Q.TRON BLK M-G2+ 430 - Solar Panel Comparison | ComparePV" description: "Compare Q-Cells Q.TRON XL-G2.3 / BFG 620 vs Q-Cells Q.TRON BLK M-G2+ 430 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-xl-g2-3-bfg-620/hanwha-q-cells-q-tron-blk-m-g2-430" image: "https://comparepv.com/og/compare/panels/hanwha-q-cells-america-inc-q-tron-xl-g2-3-bfg-620/hanwha-q-cells-q-tron-blk-m-g2-430.png" updated: 2026-09-11 --- # Q-Cells Q.TRON XL-G2.3 / BFG 620 vs Q-Cells Q.TRON BLK M-G2+ 430 13 differences, and they point both ways The largest is rated power: 190 W more power. 6 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Q-Cells Q.TRON XL-G2.3 / BFG 620](https://comparepv.com/panel/hanwha-q-cells-america-inc-q-tron-xl-g2-3-bfg-620) | [Q-Cells Q.TRON BLK M-G2+ 430](https://comparepv.com/panel/hanwha-q-cells-q-tron-blk-m-g2-430) | | Manufacturer | Q-Cells | Q-Cells | | Power | 620 Wp | 430 Wp | | Efficiency | 22.20 % | 22.00 % | | Technology | N-type | N-type | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | XL-G2.3 / BFG 620 | BLK M-G2+ 430 | Difference | | --- | --- | --- | --- | | Rated power | 620 Wp | 430 Wp | +190 W for XL-G2.3 / BFG 620 | | Performance warranty | 30 yrs | 25 yrs | +5 yrs for XL-G2.3 / BFG 620 | | Weight | 35.4 kg | 21.2 kg | -14.2 kg for BLK M-G2+ 430 | | Product warranty | 12 yrs | 25 yrs | +13 yrs for BLK M-G2+ 430 | | Weight per kWp | 57.1 kg/kWp | 49.3 kg/kWp | -7.8 kg/kWp for BLK M-G2+ 430 | | Open-circuit voltage | 56.67 V | 39.32 V | 17.35 V apart | | Module area | 2.792 m² | 1.953 m² | 0.839 m² apart | | Temperature coefficient | -0.300 %/°C | -0.290 %/°C | +0.010 %/°C for BLK M-G2+ 430 | | Module efficiency | 22.20 % | 22.00 % | +0.20 pp for XL-G2.3 / BFG 620 | | Voltage at max power | 47.50 V | 32.94 V | 14.56 V apart | | Cell count | 156 | 108 | 48 cells apart | | Bifacial | Yes | No | Yes vs No | | Dimensions | 2462x1134x35 mm | 1722x1134x30 mm | 2462x1134x35 mm vs 1722x1134x30 mm | ## Every compared parameter | Parameter | XL-G2.3 / BFG 620 | BLK M-G2+ 430 | | --- | --- | --- | | Rated power | 620 Wp | 430 Wp | | Module efficiency | 22.20 % | 22.00 % | | Power density | 222.1 Wp/m² | 220.2 Wp/m² | | Open-circuit voltage | 56.67 V | 39.32 V | | Voltage at max power | 47.50 V | 32.94 V | | Short-circuit current | 13.76 A | 13.74 A | | Current at max power | 13.05 A | 13.05 A | | Temperature coefficient | -0.300 %/°C | -0.290 %/°C | | Dimensions | 2462x1134x35 mm | 1722x1134x30 mm | | Module area | 2.792 m² | 1.953 m² | | Weight | 35.4 kg | 21.2 kg | | Weight per kWp | 57.1 kg/kWp | 49.3 kg/kWp | | Product warranty | 12 yrs | 25 yrs | | Performance warranty | 30 yrs | 25 yrs | | Annual degradation | 0.33 %/yr | 0.33 %/yr | | Cell technology | N-type | N-type | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 156 | 108 | | Bifacial | Yes | No | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year - **Cumulative output, XL-G2.3 / BFG 620:** 20,917 kWh - **Cumulative output, BLK M-G2+ 430:** 14,507 kWh - **Gap:** 6,410 kWh ## Output when hot | Condition | Cell temperature | XL-G2.3 / BFG 620 | BLK M-G2+ 430 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 620 W | 430 W | 100.0% of rated power | | Cool, bright day | 40 °C | 592 W | 411 W | 95.5% of rated power | | Typical summer roof | 55 °C | 564 W | 393 W | 91.0% of rated power | | Hot roof | 70 °C | 536 W | 374 W | 86.5% of rated power | ## Against the whole database | Measure | XL-G2.3 / BFG 620 | BLK M-G2+ 430 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #5,881 | #6,580 | 14,129 | XL-G2.3 / BFG 620 leads by 699 places | | Power density | #5,911 | #6,544 | 14,129 | XL-G2.3 / BFG 620 leads by 633 places | | Heat behaviour | #6,152 | #2,220 | 14,129 | BLK M-G2+ 430 leads by 3,932 places | | Weight | #11,133 | #2,862 | 14,129 | BLK M-G2+ 430 leads by 8,271 places | | Warranty | #21 | #9,912 | 14,129 | XL-G2.3 / BFG 620 leads by 9,891 places | | Overall | #3,514 | #8,702 | 14,129 | XL-G2.3 / BFG 620 leads by 5,188 places | ## Questions ### Which panel is better: Q-Cells Q.TRON XL-G2.3 / BFG 620 or Q-Cells Q.TRON BLK M-G2+ 430? According to our database: **Q-Cells Q.TRON XL-G2.3 / BFG 620** has higher module efficiency (**22.20%** vs **22.00%**); **Q-Cells Q.TRON BLK M-G2+ 430** tolerates heat better (temp coeff **-0.290%/°C** vs **-0.300%/°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 XL-G2.3 / BFG 620 and Q-Cells Q.TRON BLK M-G2+ 430? **Q-Cells Q.TRON XL-G2.3 / BFG 620** has a module efficiency of **22.20%**, while **Q-Cells Q.TRON BLK M-G2+ 430** is **22.00%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Q-Cells Q.TRON XL-G2.3 / BFG 620 use vs Q-Cells Q.TRON BLK M-G2+ 430? **Q-Cells Q.TRON XL-G2.3 / BFG 620** uses **N-type** cells; **Q-Cells Q.TRON BLK M-G2+ 430** uses **N-type**. 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 XL-G2.3 / BFG 620 and Q-Cells Q.TRON BLK M-G2+ 430? **Q-Cells Q.TRON XL-G2.3 / BFG 620** has a **30 years** power warranty; **Q-Cells Q.TRON BLK M-G2+ 430** has a **25 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 XL-G2.3 / BFG 620 and Q-Cells Q.TRON BLK M-G2+ 430 bifacial panels? **Q-Cells Q.TRON XL-G2.3 / BFG 620** is bifacial (captures light from both faces); **Q-Cells Q.TRON BLK M-G2+ 430** is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath. ## Related comparisons - [Q-Cells Q.TRON XL-G2.3 / BFG 620 vs Q-Cells Q.TRON XL-G2.3 / BFG 645](https://comparepv.com/compare/hanwha-q-cells-america-inc-q-tron-xl-g2-3-bfg-620/q-cells-q-tron-xl-g2-3-bfg-645) - 6 differences, the largest is module efficiency - [Q-Cells Q.TRON XL-G2.3 / BFG 620 vs Q-Cells Q.TRON XL-G2.3 / BFG 640](https://comparepv.com/compare/hanwha-q-cells-america-inc-q-tron-xl-g2-3-bfg-620/q-cells-q-tron-xl-g2-3-bfg-640) - 5 differences, the largest is module efficiency - [Q-Cells Q.TRON XL-G2.3 / BFG 620 vs Q-Cells Q.TRON XL-G2.3 / BFG 635](https://comparepv.com/compare/hanwha-q-cells-america-inc-q-tron-xl-g2-3-bfg-620/hanwha-q-cells-america-inc-q-tron-xl-g2-3-bfg-635) - 3 differences, the largest is module efficiency - [Q-Cells Q.TRON XL-G2.3 / BFG 620 vs Q-Cells Q.TRON XL-G2.3 / BFG 630](https://comparepv.com/compare/hanwha-q-cells-america-inc-q-tron-xl-g2-3-bfg-620/hanwha-q-cells-america-inc-q-tron-xl-g2-3-bfg-630) - 3 differences, the largest is module efficiency - [Q-Cells Q.TRON XL-G2.3 / BFG 620 vs Q-Cells Q.TRON XL-G2.3 / BFG 625](https://comparepv.com/compare/hanwha-q-cells-america-inc-q-tron-xl-g2-3-bfg-620/hanwha-q-cells-america-inc-q-tron-xl-g2-3-bfg-625) - One difference: module efficiency - [Q-Cells Q.TRON XL-G2.3 / BFG 620 vs Q-Cells Q.TRON XL-G2.3 / BFG 615](https://comparepv.com/compare/hanwha-q-cells-america-inc-q-tron-xl-g2-3-bfg-620/hanwha-q-cells-america-inc-q-tron-xl-g2-3-bfg-615) - One difference: module efficiency --- Source: https://comparepv.com/compare/hanwha-q-cells-america-inc-q-tron-xl-g2-3-bfg-620/hanwha-q-cells-q-tron-blk-m-g2-430 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.