--- title: "Longi Solar LR7-54HJD-495M vs Longi Solar LR7-54HJD-505M - Solar Panel Comparison | ComparePV" description: "Compare Longi Solar LR7-54HJD-495M vs Longi Solar LR7-54HJD-505M side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/longi-lr7-54hjd-495m/longi-lr7-54hjd-505m" updated: 2026-09-11 --- # Longi Solar LR7-54HJD-495M vs Longi Solar LR7-54HJD-505M 505M leads on the differences that matter The largest is module efficiency: 0.40 pp more efficient. 16 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Longi Solar LR7-54HJD-495M](https://comparepv.com/panel/longi-lr7-54hjd-495m) | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | | Manufacturer | Longi Solar | Longi Solar | | Power | 495 Wp | 505 Wp | | Efficiency | 24.30 % | 24.70 % | | Technology | Back Contact | Back Contact | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 495M | 505M | Difference | | --- | --- | --- | --- | | Module efficiency | 24.30 % | 24.70 % | +0.40 pp for 505M | | Power density | 242.5 Wp/m² | 247.4 Wp/m² | +4.9 Wp/m² for 505M | | Rated power | 495 Wp | 505 Wp | +10 W for 505M | ## Every compared parameter | Parameter | 495M | 505M | | --- | --- | --- | | Rated power | 495 Wp | 505 Wp | | Module efficiency | 24.30 % | 24.70 % | | Power density | 242.5 Wp/m² | 247.4 Wp/m² | | Open-circuit voltage | 41.25 V | 41.45 V | | Voltage at max power | 34.07 V | 34.27 V | | Short-circuit current | 15.19 A | 15.41 A | | Current at max power | 14.53 A | 14.74 A | | Temperature coefficient | -0.240 %/°C | -0.240 %/°C | | Dimensions | 1800x1134x30 mm | 1800x1134x30 mm | | Module area | 2.041 m² | 2.041 m² | | Weight | 23.5 kg | 23.5 kg | | Weight per kWp | 47.5 kg/kWp | 46.5 kg/kWp | | Product warranty | 30 yrs | 30 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.35 %/yr | 0.35 %/yr | | Cell technology | Back Contact | Back Contact | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 108 | 108 | | 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 (-0.240 %/°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, 495M:** 16,737 kWh - **Cumulative output, 505M:** 17,076 kWh - **Gap:** 339 kWh ## Output when hot | Condition | Cell temperature | 495M | 505M | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 495 W | 505 W | 100.0% of rated power | | Cool, bright day | 40 °C | 477 W | 487 W | 96.4% of rated power | | Typical summer roof | 55 °C | 459 W | 469 W | 92.8% of rated power | | Hot roof | 70 °C | 442 W | 450 W | 89.2% of rated power | ## Against the whole database | Measure | 495M | 505M | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #131 | #39 | 14,005 | 505M leads by 92 places | | Power density | #159 | #39 | 14,005 | 505M leads by 120 places | | Heat behaviour | #13 | #13 | 14,005 | Tied - the same position in the database | | Weight | #1,708 | #1,199 | 14,005 | 505M leads by 509 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #1,810 | #1,425 | 14,005 | 505M leads by 385 places | ## Questions ### Which panel is better: Longi Solar LR7-54HJD-495M or Longi Solar LR7-54HJD-505M? According to our database: **Longi Solar LR7-54HJD-505M** has higher module efficiency (**24.70%** vs **24.30%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Longi Solar LR7-54HJD-495M and Longi Solar LR7-54HJD-505M? **Longi Solar LR7-54HJD-495M** has a module efficiency of **24.30%**, while **Longi Solar LR7-54HJD-505M** is **24.70%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Longi Solar LR7-54HJD-495M use vs Longi Solar LR7-54HJD-505M? **Longi Solar LR7-54HJD-495M** uses **Back Contact** cells; **Longi Solar LR7-54HJD-505M** uses **Back Contact**. 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 LR7-54HJD-495M and Longi Solar LR7-54HJD-505M? **Longi Solar LR7-54HJD-495M** has a **30 years** power warranty; **Longi Solar LR7-54HJD-505M** 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 LR7-54HJD-495M and Longi Solar LR7-54HJD-505M bifacial panels? Both **Longi Solar LR7-54HJD-495M** and **Longi Solar LR7-54HJD-505M** 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 LR7-54HJD-495M vs Longi Solar LR7-54HJD-510M](https://comparepv.com/compare/longi-lr7-54hjd-495m/longi-lr7-54hjd-510m) - 3 differences, the largest is module efficiency - [Longi Solar LR7-54HJD-495M vs Longi Solar LR7-54HJD-500M](https://comparepv.com/compare/longi-lr7-54hjd-495m/longi-lr7-54hjd-500m) - One difference: module efficiency - [Longi Solar LR7-54HJD-495M vs Longi Solar LR7-72HVHF-670M](https://comparepv.com/compare/longi-lr7-54hjd-495m/longi-lr7-72hvhf-670m) - 14 differences, the largest is rated power - [Longi Solar LR7-54HJD-495M vs Longi Solar LR8-66HYD-670M](https://comparepv.com/compare/longi-lr7-54hjd-495m/longi-lr8-66hyd-670m) - 14 differences, the largest is rated power - [Longi Solar LR7-54HJD-495M vs Longi Solar LR7-72HVH-670M](https://comparepv.com/compare/longi-lr7-54hjd-495m/longi-lr7-72hvh-670m) - 14 differences, the largest is rated power - [Longi Solar LR7-54HJD-495M vs Longi Solar LR7-72HVHF-665M](https://comparepv.com/compare/longi-lr7-54hjd-495m/longi-lr7-72hvhf-665m) - 14 differences, the largest is rated power --- Source: https://comparepv.com/compare/longi-lr7-54hjd-495m/longi-lr7-54hjd-505m 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.