--- title: "Longi Solar LR7-72HVDF-650M vs Longi Solar LR7-72HVDF-655M - Solar Panel Comparison | ComparePV" description: "Compare Longi Solar LR7-72HVDF-650M vs Longi Solar LR7-72HVDF-655M side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/longi-lr7-72hvdf-650m/longi-lr7-72hvdf-655m" updated: 2026-09-11 --- # Longi Solar LR7-72HVDF-650M vs Longi Solar LR7-72HVDF-655M Identical on every published parameter All 19 comparable parameters agree. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Longi Solar LR7-72HVDF-650M](https://comparepv.com/panel/longi-lr7-72hvdf-650m) | [Longi Solar LR7-72HVDF-655M](https://comparepv.com/panel/longi-lr7-72hvdf-655m) | | Manufacturer | Longi Solar | Longi Solar | | Power | 650 Wp | 655 Wp | | Efficiency | 24.10 % | 24.20 % | | Technology | N-type | N-type | ## Every compared parameter | Parameter | 650M | 655M | | --- | --- | --- | | Rated power | 650 Wp | 655 Wp | | Module efficiency | 24.10 % | 24.20 % | | Power density | 240.6 Wp/m² | 242.5 Wp/m² | | Open-circuit voltage | 54.22 V | 54.32 V | | Voltage at max power | 44.87 V | 44.97 V | | Short-circuit current | 15.14 A | 15.22 A | | Current at max power | 14.49 A | 14.57 A | | Temperature coefficient | -0.260 %/°C | -0.260 %/°C | | Dimensions | 2382x1134x30 mm | 2382x1134x30 mm | | Module area | 2.701 m² | 2.701 m² | | Weight | 33.5 kg | 33.5 kg | | Weight per kWp | 51.5 kg/kWp | 51.1 kg/kWp | | Product warranty | 15 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.35 %/yr | 0.35 %/yr | | Cell technology | N-type | N-type | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 144 | 144 | | Bifacial | Yes | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.260 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other. - **Cumulative output, 650M:** 21,978 kWh - **Cumulative output, 655M:** 22,148 kWh - **Gap:** 170 kWh ## Output when hot | Condition | Cell temperature | 650M | 655M | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 650 W | 655 W | 100.0% of rated power | | Cool, bright day | 40 °C | 625 W | 629 W | 96.1% of rated power | | Typical summer roof | 55 °C | 599 W | 604 W | 92.2% of rated power | | Hot roof | 70 °C | 574 W | 578 W | 88.3% of rated power | ## Against the whole database | Measure | 650M | 655M | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #219 | #184 | 14,005 | 655M leads by 35 places | | Power density | #233 | #172 | 14,005 | 655M leads by 61 places | | Heat behaviour | #511 | #511 | 14,005 | Tied - the same position in the database | | Weight | #4,914 | #4,503 | 14,005 | 655M leads by 411 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #891 | #747 | 14,005 | 655M leads by 144 places | ## Questions ### Which panel is better: Longi Solar LR7-72HVDF-650M or Longi Solar LR7-72HVDF-655M? According to our database: **Longi Solar LR7-72HVDF-655M** has higher module efficiency (**24.20%** vs **24.10%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Longi Solar LR7-72HVDF-650M and Longi Solar LR7-72HVDF-655M? **Longi Solar LR7-72HVDF-650M** has a module efficiency of **24.10%**, while **Longi Solar LR7-72HVDF-655M** is **24.20%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Longi Solar LR7-72HVDF-650M use vs Longi Solar LR7-72HVDF-655M? **Longi Solar LR7-72HVDF-650M** uses **N-type** cells; **Longi Solar LR7-72HVDF-655M** 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 LR7-72HVDF-650M and Longi Solar LR7-72HVDF-655M? **Longi Solar LR7-72HVDF-650M** has a **30 years** power warranty; **Longi Solar LR7-72HVDF-655M** 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 LR7-72HVDF-650M and Longi Solar LR7-72HVDF-655M bifacial panels? Both **Longi Solar LR7-72HVDF-650M** and **Longi Solar LR7-72HVDF-655M** are bifacial - they capture reflected light from the ground, which can add 5**-15%** more annual energy on ground-mount or elevated rooftop installations with a light surface beneath. ## Related comparisons - [Longi Solar LR7-72HVDF-650M vs Longi Solar LR7-72HVDF-665M](https://comparepv.com/compare/longi-lr7-72hvdf-650m/longi-lr7-72hvdf-665m) - 3 differences, the largest is module efficiency - [Longi Solar LR7-72HVDF-650M vs Longi Solar LR7-72HVDF-660M](https://comparepv.com/compare/longi-lr7-72hvdf-650m/longi-lr7-72hvdf-660m) - 3 differences, the largest is module efficiency - [Longi Solar LR7-72HVDF-650M vs Longi Solar LR7-72HVDF-645M](https://comparepv.com/compare/longi-lr7-72hvdf-650m/longi-lr7-72hvdf-645m) - One difference: module efficiency - [Longi Solar LR7-72HVDF-650M vs Longi Solar LR7-72HVDF-640M](https://comparepv.com/compare/longi-lr7-72hvdf-650m/longi-lr7-72hvdf-640m) - 3 differences, the largest is module efficiency - [Longi Solar LR7-72HVDF-650M vs Longi Solar LR7-72HVHF-670M](https://comparepv.com/compare/longi-lr7-72hvdf-650m/longi-lr7-72hvhf-670m) - 6 differences, the largest is module efficiency - [Longi Solar LR7-72HVDF-650M vs Longi Solar LR8-66HYD-670M](https://comparepv.com/compare/longi-lr7-72hvdf-650m/longi-lr8-66hyd-670m) - 10 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/longi-lr7-72hvdf-650m/longi-lr7-72hvdf-655m 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.