--- title: "Longi Solar LR7-72HTDR-620M vs Longi Solar LR7-72HTDR-625M - Solar Panel Comparison | ComparePV" description: "Compare Longi Solar LR7-72HTDR-620M vs Longi Solar LR7-72HTDR-625M side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/longi-lr7-72htdr-620m/longi-lr7-72htdr-625m" updated: 2026-09-11 --- # Longi Solar LR7-72HTDR-620M vs Longi Solar LR7-72HTDR-625M 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 LR7-72HTDR-620M](https://comparepv.com/panel/longi-lr7-72htdr-620m) | [Longi Solar LR7-72HTDR-625M](https://comparepv.com/panel/longi-lr7-72htdr-625m) | | Manufacturer | Longi Solar | Longi Solar | | Power | 620 Wp | 625 Wp | | Efficiency | 23.00 % | 23.10 % | | Technology | N-type | N-type | ## Every compared parameter | Parameter | 620M | 625M | | --- | --- | --- | | Rated power | 620 Wp | 625 Wp | | Module efficiency | 23.00 % | 23.10 % | | Power density | 229.5 Wp/m² | 231.4 Wp/m² | | Open-circuit voltage | 53.11 V | 53.26 V | | Voltage at max power | 44.78 V | 44.93 V | | Short-circuit current | 14.82 A | 14.90 A | | Current at max power | 13.85 A | 13.92 A | | Temperature coefficient | -0.280 %/°C | -0.280 %/°C | | Dimensions | 2382x1134x30 mm | 2382x1134x30 mm | | Module area | 2.701 m² | 2.701 m² | | Weight | 33.5 kg | 33.5 kg | | Weight per kWp | 54.0 kg/kWp | 53.6 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 (-0.280 %/°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, 620M:** 20,964 kWh - **Cumulative output, 625M:** 21,133 kWh - **Gap:** 169 kWh ## Output when hot | Condition | Cell temperature | 620M | 625M | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 620 W | 625 W | 100.0% of rated power | | Cool, bright day | 40 °C | 594 W | 599 W | 95.8% of rated power | | Typical summer roof | 55 °C | 568 W | 573 W | 91.6% of rated power | | Hot roof | 70 °C | 542 W | 546 W | 87.4% of rated power | ## Against the whole database | Measure | 620M | 625M | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #1,919 | #1,570 | 14,005 | 625M leads by 349 places | | Power density | #2,191 | #1,513 | 14,005 | 625M leads by 678 places | | Heat behaviour | #1,309 | #1,309 | 14,005 | Tied - the same position in the database | | Weight | #8,248 | #7,601 | 14,005 | 625M leads by 647 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #2,048 | #1,879 | 14,005 | 625M leads by 169 places | ## Questions ### Which panel is better: Longi Solar LR7-72HTDR-620M or Longi Solar LR7-72HTDR-625M? According to our database: **Longi Solar LR7-72HTDR-625M** has higher module efficiency (**23.10%** vs **23.00%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Longi Solar LR7-72HTDR-620M and Longi Solar LR7-72HTDR-625M? **Longi Solar LR7-72HTDR-620M** has a module efficiency of **23.00%**, while **Longi Solar LR7-72HTDR-625M** is **23.10%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Longi Solar LR7-72HTDR-620M use vs Longi Solar LR7-72HTDR-625M? **Longi Solar LR7-72HTDR-620M** uses **N-type** cells; **Longi Solar LR7-72HTDR-625M** 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 LR7-72HTDR-620M and Longi Solar LR7-72HTDR-625M? **Longi Solar LR7-72HTDR-620M** has a **30 years** power warranty; **Longi Solar LR7-72HTDR-625M** 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 LR7-72HTDR-620M and Longi Solar LR7-72HTDR-625M bifacial panels? Both **Longi Solar LR7-72HTDR-620M** and **Longi Solar LR7-72HTDR-625M** 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 LR7-72HTDR-620M vs Longi Solar LR7-72HTDR-615M](https://comparepv.com/compare/longi-lr7-72htdr-620m/longi-lr7-72htdr-615m) - One difference: module efficiency - [Longi Solar LR7-72HTDR-620M vs Longi Solar LR7-72HTDR-610M](https://comparepv.com/compare/longi-lr7-72htdr-620m/longi-lr7-72htdr-610m) - 3 differences, the largest is module efficiency - [Longi Solar LR7-72HTDR-620M vs Longi Solar LR7-72HTDR-605M](https://comparepv.com/compare/longi-lr7-72htdr-620m/longi-lr7-72htdr-605m) - 3 differences, the largest is module efficiency - [Longi Solar LR7-72HTDR-620M vs Longi Solar LR7-72HTDR-600M](https://comparepv.com/compare/longi-lr7-72htdr-620m/longi-lr7-72htdr-600m) - 3 differences, the largest is module efficiency - [Longi Solar LR7-72HTDR-620M vs Longi Solar LR7-72HVHF-670M](https://comparepv.com/compare/longi-lr7-72htdr-620m/longi-lr7-72hvhf-670m) - 10 differences, the largest is module efficiency - [Longi Solar LR7-72HTDR-620M vs Longi Solar LR8-66HYD-670M](https://comparepv.com/compare/longi-lr7-72htdr-620m/longi-lr8-66hyd-670m) - 12 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/longi-lr7-72htdr-620m/longi-lr7-72htdr-625m 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.