--- title: "Leapton LP182*199-M-66-NB 580W vs Leapton LP182*199-M-66-NB 585W - Solar Panel Comparison | ComparePV" description: "Compare Leapton LP182*199-M-66-NB 580W vs Leapton LP182*199-M-66-NB 585W side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/leapton-lp182-199-m-66-nb-580w/leapton-lp182-199-m-66-nb-585w" updated: 2026-09-11 --- # Leapton LP182\*199-M-66-NB 580W vs Leapton LP182\*199-M-66-NB 585W 585W leads on the differences that matter The largest is module efficiency: 0.20 pp more efficient. 18 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Leapton LP182\*199-M-66-NB 580W](https://comparepv.com/panel/leapton-lp182-199-m-66-nb-580w) | [Leapton LP182\*199-M-66-NB 585W](https://comparepv.com/panel/leapton-lp182-199-m-66-nb-585w) | | Manufacturer | Leapton | Leapton | | Power | 580 Wp | 585 Wp | | Efficiency | 22.44 % | 22.64 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 580W | 585W | Difference | | --- | --- | --- | --- | | Module efficiency | 22.44 % | 22.64 % | +0.20 pp for 585W | ## Every compared parameter | Parameter | 580W | 585W | | --- | --- | --- | | Rated power | 580 Wp | 585 Wp | | Module efficiency | 22.44 % | 22.64 % | | Power density | 224.4 Wp/m² | 226.4 Wp/m² | | Open-circuit voltage | 48.22 V | 48.42 V | | Voltage at max power | 40.31 V | 40.51 V | | Short-circuit current | 15.22 A | 15.27 A | | Current at max power | 14.39 A | 14.44 A | | Temperature coefficient | -0.300 %/°C | -0.300 %/°C | | Dimensions | 2279x1134x30 mm | 2279x1134x30 mm | | Module area | 2.584 m² | 2.584 m² | | Weight | 32.0 kg | 32.0 kg | | Weight per kWp | 55.2 kg/kWp | 54.7 kg/kWp | | Product warranty | 25 yrs | 25 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.40 %/yr | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 132 | 132 | | 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 (-0.300 %/°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, 580W:** 19,460 kWh - **Cumulative output, 585W:** 19,628 kWh - **Gap:** 168 kWh ## Output when hot | Condition | Cell temperature | 580W | 585W | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 580 W | 585 W | 100.0% of rated power | | Cool, bright day | 40 °C | 554 W | 559 W | 95.5% of rated power | | Typical summer roof | 55 °C | 528 W | 532 W | 91.0% of rated power | | Hot roof | 70 °C | 502 W | 506 W | 86.5% of rated power | ## Against the whole database | Measure | 580W | 585W | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #4,716 | #3,600 | 14,005 | 585W leads by 1,116 places | | Power density | #4,692 | #3,631 | 14,005 | 585W leads by 1,061 places | | Heat behaviour | #6,093 | #6,093 | 14,005 | Tied - the same position in the database | | Weight | #9,588 | #9,081 | 14,005 | 585W leads by 507 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #2,065 | #1,796 | 14,005 | 585W leads by 269 places | ## Questions ### Which panel is better: Leapton LP182\*199-M-66-NB 580W or Leapton LP182\*199-M-66-NB 585W? According to our database: **Leapton LP182\*199-M-66-NB **585 W**** has higher module efficiency (**22.64%** vs **22.44%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Leapton LP182\*199-M-66-NB 580W and Leapton LP182\*199-M-66-NB 585W? **Leapton LP182\*199-M-66-NB **580 W**** has a module efficiency of **22.44%**, while **Leapton LP182\*199-M-66-NB **585 W**** is **22.64%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Leapton LP182\*199-M-66-NB 580W use vs Leapton LP182\*199-M-66-NB 585W? **Leapton LP182\*199-M-66-NB **580 W**** uses **TOPCon** cells; **Leapton LP182\*199-M-66-NB **585 W**** uses **TOPCon**. 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 Leapton LP182\*199-M-66-NB 580W and Leapton LP182\*199-M-66-NB 585W? **Leapton LP182\*199-M-66-NB **580 W**** has a **30 years** power warranty; **Leapton LP182\*199-M-66-NB **585 W**** 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 Leapton LP182\*199-M-66-NB 580W and Leapton LP182\*199-M-66-NB 585W bifacial panels? Both **Leapton LP182\*199-M-66-NB **580 W**** and **Leapton LP182\*199-M-66-NB **585 W**** 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 - [Leapton LP182\*199-M-66-NB 580W vs Leapton LP182\*199-M-66-NB 590W](https://comparepv.com/compare/leapton-lp182-199-m-66-nb-580w/leapton-lp182-199-m-66-nb-590w) - 3 differences, the largest is module efficiency - [Leapton LP182\*199-M-66-NB 580W vs Leapton LP182\*199-M-66-NB 575W](https://comparepv.com/compare/leapton-lp182-199-m-66-nb-580w/leapton-lp182-199-m-66-nb-575w) - The same specification on paper - [Leapton LP182\*199-M-66-NB 580W vs Leapton LP182\*199-M-66-NB 570W](https://comparepv.com/compare/leapton-lp182-199-m-66-nb-580w/leapton-lp182-199-m-66-nb-570w) - 3 differences, the largest is module efficiency - [Leapton LP182\*199-M-66-NB 580W vs Leapton LP210\*210-M-66-NH-720W](https://comparepv.com/compare/leapton-lp182-199-m-66-nb-580w/leapton-lp210-210-m-66-nh-720w) - 10 differences, the largest is module efficiency - [Leapton LP182\*199-M-66-NB 580W vs Leapton LP210\*210-M-66-NB-720W](https://comparepv.com/compare/leapton-lp182-199-m-66-nb-580w/leapton-lp210-210-m-66-nb-720w) - 9 differences, the largest is module efficiency - [Leapton LP182\*199-M-66-NB 580W vs Leapton LP210\*210-M-66-NH-715W](https://comparepv.com/compare/leapton-lp182-199-m-66-nb-580w/leapton-lp210-210-m-66-nh-715w) - 10 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/leapton-lp182-199-m-66-nb-580w/leapton-lp182-199-m-66-nb-585w 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.