--- title: "Longi Solar LR7-54HTH-455M vs Longi Solar LR7-72HVDF-665M - Solar Panel Comparison | ComparePV" description: "Compare Longi Solar LR7-54HTH-455M vs Longi Solar LR7-72HVDF-665M side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/longi-lr7-54hth-455m/longi-lr7-72hvdf-665m" updated: 2026-09-11 --- # Longi Solar LR7-54HTH-455M vs Longi Solar LR7-72HVDF-665M 72HVDF-665M leads on the differences that matter The largest is module efficiency: 2.30 pp more efficient. 3 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Longi Solar LR7-54HTH-455M](https://comparepv.com/panel/longi-lr7-54hth-455m) | [Longi Solar LR7-72HVDF-665M](https://comparepv.com/panel/longi-lr7-72hvdf-665m) | | Manufacturer | Longi Solar | Longi Solar | | Power | 455 Wp | 665 Wp | | Efficiency | 22.30 % | 24.60 % | | Technology | N-type | N-type | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 54HTH-455M | 72HVDF-665M | Difference | | --- | --- | --- | --- | | Module efficiency | 22.30 % | 24.60 % | +2.30 pp for 72HVDF-665M | | Rated power | 455 Wp | 665 Wp | +210 W for 72HVDF-665M | | Power density | 222.9 Wp/m² | 246.2 Wp/m² | +23.3 Wp/m² for 72HVDF-665M | | Performance warranty | 25 yrs | 30 yrs | +5 yrs for 72HVDF-665M | | Weight | 21.6 kg | 33.5 kg | -11.9 kg for 54HTH-455M | | Temperature coefficient | -0.280 %/°C | -0.260 %/°C | +0.020 %/°C for 72HVDF-665M | | Open-circuit voltage | 39.15 V | 54.52 V | 15.37 V apart | | Module area | 2.041 m² | 2.701 m² | 0.660 m² apart | | Weight per kWp | 47.5 kg/kWp | 50.4 kg/kWp | -2.9 kg/kWp for 54HTH-455M | | Annual degradation | 0.40 %/yr | 0.35 %/yr | -0.05 %/yr for 72HVDF-665M | | Voltage at max power | 32.98 V | 45.17 V | 12.19 V apart | | Cell count | 108 | 144 | 36 cells apart | | Bifacial | No | Yes | No vs Yes | | Short-circuit current | 14.79 A | 15.35 A | 0.56 A apart | | Dimensions | 1800x1134x30 mm | 2382x1134x30 mm | 1800x1134x30 mm vs 2382x1134x30 mm | | Current at max power | 13.80 A | 14.72 A | 0.92 A apart | ## Every compared parameter | Parameter | 54HTH-455M | 72HVDF-665M | | --- | --- | --- | | Rated power | 455 Wp | 665 Wp | | Module efficiency | 22.30 % | 24.60 % | | Power density | 222.9 Wp/m² | 246.2 Wp/m² | | Open-circuit voltage | 39.15 V | 54.52 V | | Voltage at max power | 32.98 V | 45.17 V | | Short-circuit current | 14.79 A | 15.35 A | | Current at max power | 13.80 A | 14.72 A | | Temperature coefficient | -0.280 %/°C | -0.260 %/°C | | Dimensions | 1800x1134x30 mm | 2382x1134x30 mm | | Module area | 2.041 m² | 2.701 m² | | Weight | 21.6 kg | 33.5 kg | | Weight per kWp | 47.5 kg/kWp | 50.4 kg/kWp | | Product warranty | 15 yrs | 15 yrs | | Performance warranty | 25 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.35 %/yr | | Cell technology | N-type | N-type | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 108 | 144 | | Bifacial | No | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year - **Cumulative output, 54HTH-455M:** 15,266 kWh - **Cumulative output, 72HVDF-665M:** 22,486 kWh - **Gap:** 7,220 kWh ## Output when hot | Condition | Cell temperature | 54HTH-455M | 72HVDF-665M | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 455 W | 665 W | 100.0% of rated power | | Cool, bright day | 40 °C | 436 W | 639 W | 95.8% of rated power | | Typical summer roof | 55 °C | 417 W | 613 W | 91.6% of rated power | | Hot roof | 70 °C | 398 W | 587 W | 87.4% of rated power | ## Against the whole database | Measure | 54HTH-455M | 72HVDF-665M | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #5,100 | #51 | 14,005 | 72HVDF-665M leads by 5,049 places | | Power density | #5,100 | #42 | 14,005 | 72HVDF-665M leads by 5,058 places | | Heat behaviour | #1,309 | #511 | 14,005 | 72HVDF-665M leads by 798 places | | Weight | #1,700 | #3,742 | 14,005 | 54HTH-455M leads by 2,042 places | | Warranty | #9,798 | #21 | 14,005 | 72HVDF-665M leads by 9,777 places | | Overall | #9,419 | #414 | 14,005 | 72HVDF-665M leads by 9,005 places | ## Questions ### Which panel is better: Longi Solar LR7-54HTH-455M or Longi Solar LR7-72HVDF-665M? According to our database: **Longi Solar LR7-72HVDF-665M** has higher module efficiency (**24.60%** vs **22.30%**); **Longi Solar LR7-72HVDF-665M** tolerates heat better (temp coeff **-0.260%/°C** vs **-0.280%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Longi Solar LR7-54HTH-455M and Longi Solar LR7-72HVDF-665M? **Longi Solar LR7-54HTH-455M** has a module efficiency of **22.30%**, while **Longi Solar LR7-72HVDF-665M** is **24.60%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Longi Solar LR7-54HTH-455M use vs Longi Solar LR7-72HVDF-665M? **Longi Solar LR7-54HTH-455M** uses **N-type** cells; **Longi Solar LR7-72HVDF-665M** 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 Longi Solar LR7-54HTH-455M and Longi Solar LR7-72HVDF-665M? **Longi Solar LR7-54HTH-455M** has a **25 years** power warranty; **Longi Solar LR7-72HVDF-665M** 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 Longi Solar LR7-54HTH-455M and Longi Solar LR7-72HVDF-665M bifacial panels? **Longi Solar LR7-72HVDF-665M** is bifacial (captures light from both faces); **Longi Solar LR7-54HTH-455M** is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath. ## Related comparisons - [Longi Solar LR7-54HTH-455M vs Longi Solar LR7-54HTH-465M](https://comparepv.com/compare/longi-lr7-54hth-455m/longi-lr7-54hth-465m) - 3 differences, the largest is module efficiency - [Longi Solar LR7-54HTH-455M vs Longi Solar LR7-54HTH-460M](https://comparepv.com/compare/longi-lr7-54hth-455m/longi-lr7-54hth-460m) - One difference: module efficiency - [Longi Solar LR7-72HVDF-665M vs Longi Solar LR7-72HVDF-660M](https://comparepv.com/compare/longi-lr7-72hvdf-665m/longi-lr7-72hvdf-660m) - One difference: module efficiency - [Longi Solar LR7-72HVDF-665M vs Longi Solar LR7-72HVDF-655M](https://comparepv.com/compare/longi-lr7-72hvdf-665m/longi-lr7-72hvdf-655m) - 3 differences, the largest is module efficiency - [Longi Solar LR7-72HVDF-665M vs Longi Solar LR7-72HVDF-650M](https://comparepv.com/compare/longi-lr7-72hvdf-665m/longi-lr7-72hvdf-650m) - 3 differences, the largest is module efficiency - [Longi Solar LR7-72HVDF-665M vs Longi Solar LR7-72HVDF-645M](https://comparepv.com/compare/longi-lr7-72hvdf-665m/longi-lr7-72hvdf-645m) - 3 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/longi-lr7-54hth-455m/longi-lr7-72hvdf-665m 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.