--- title: "Sharp NB-JD575 vs Sharp NB-JD580 - Solar Panel Comparison | ComparePV" description: "Compare Sharp NB-JD575 vs Sharp NB-JD580 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/sharp-nb-jd575/sharp-nb-jd580" updated: 2026-09-11 --- # Sharp NB-JD575 vs Sharp NB-JD580 Identical on every published parameter All 18 comparable parameters agree, with 1 more left out because at least one datasheet does not publish it. 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 | [Sharp NB-JD575](https://comparepv.com/panel/sharp-nb-jd575) | [Sharp NB-JD580](https://comparepv.com/panel/sharp-nb-jd580) | | Manufacturer | Sharp | Sharp | | Power | 575 Wp | 580 Wp | | Efficiency | 22.26 % | 22.45 % | | Technology | TOPCon | TOPCon | ## Every compared parameter | Parameter | JD575 | JD580 | | --- | --- | --- | | Rated power | 575 Wp | 580 Wp | | Module efficiency | 22.26 % | 22.45 % | | Power density | 222.6 Wp/m² | 224.5 Wp/m² | | Open-circuit voltage | 52.34 V | 52.55 V | | Voltage at max power | 43.01 V | 43.19 V | | Short-circuit current | 13.97 A | 14.03 A | | Current at max power | 13.37 A | 13.43 A | | Temperature coefficient | -0.300 %/°C | -0.300 %/°C | | Dimensions | 2278x1134x30 mm | 2278x1134x30 mm | | Module area | 2.583 m² | 2.583 m² | | Weight | 32.5 kg | 32.5 kg | | Weight per kWp | 56.5 kg/kWp | 56.0 kg/kWp | | Product warranty | 25 yrs | 25 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | - | - | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 144 | 144 | | Bifacial | Yes | Yes | ## Thirty-year yield A 1.0% first-year loss then 0.40% a year, assumed for both panels, 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, JD575:** 19,292 kWh - **Cumulative output, JD580:** 19,460 kWh - **Gap:** 168 kWh ## Output when hot | Condition | Cell temperature | JD575 | JD580 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 575 W | 580 W | 100.0% of rated power | | Cool, bright day | 40 °C | 549 W | 554 W | 95.5% of rated power | | Typical summer roof | 55 °C | 523 W | 528 W | 91.0% of rated power | | Hot roof | 70 °C | 497 W | 502 W | 86.5% of rated power | ## Against the whole database | Measure | JD575 | JD580 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #5,593 | #4,620 | 14,005 | JD580 leads by 973 places | | Power density | #5,549 | #4,547 | 14,005 | JD580 leads by 1,002 places | | Heat behaviour | #6,093 | #6,093 | 14,005 | Tied - the same position in the database | | Weight | #10,695 | #10,343 | 14,005 | JD580 leads by 352 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #2,357 | #2,056 | 14,005 | JD580 leads by 301 places | ## Questions ### Which panel is better: Sharp NB-JD575 or Sharp NB-JD580? According to our database: **Sharp NB-JD580** has higher module efficiency (**22.45%** vs **22.26%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Sharp NB-JD575 and Sharp NB-JD580? **Sharp NB-JD575** has a module efficiency of **22.26%**, while **Sharp NB-JD580** is **22.45%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Sharp NB-JD575 use vs Sharp NB-JD580? **Sharp NB-JD575** uses **TOPCon** cells; **Sharp NB-JD580** 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 Sharp NB-JD575 and Sharp NB-JD580? **Sharp NB-JD575** has a **30 years** power warranty; **Sharp NB-JD580** 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 Sharp NB-JD575 and Sharp NB-JD580 bifacial panels? Both **Sharp NB-JD575** and **Sharp NB-JD580** 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 - [Sharp NB-JD575 vs Sharp NB-JD570](https://comparepv.com/compare/sharp-nb-jd575/sharp-nb-jd570) - One difference: product warranty - [Sharp NB-JD575 vs Sharp GSD8K66H-740WT](https://comparepv.com/compare/sharp-nb-jd575/sharp-gsd8k66h-740wt) - 12 differences, the largest is module efficiency - [Sharp NB-JD575 vs Sharp GSD8K66H-735WT](https://comparepv.com/compare/sharp-nb-jd575/sharp-gsd8k66h-735wt) - 12 differences, the largest is module efficiency - [Sharp NB-JD575 vs Sharp GSD8K66H-730WT](https://comparepv.com/compare/sharp-nb-jd575/sharp-gsd8k66h-730wt) - 13 differences, the largest is module efficiency - [Sharp NB-JD575 vs Sharp GSD8K66H-725WT](https://comparepv.com/compare/sharp-nb-jd575/sharp-gsd8k66h-725wt) - 13 differences, the largest is module efficiency - [Sharp NB-JD575 vs Sharp GSD8K66H-720WT](https://comparepv.com/compare/sharp-nb-jd575/sharp-gsd8k66h-720wt) - 13 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/sharp-nb-jd575/sharp-nb-jd580 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.