--- title: "Navitas Solar NSM540-144 vs Navitas Solar NSM545-144 - Solar Panel Comparison | ComparePV" description: "Compare Navitas Solar NSM540-144 vs Navitas Solar NSM545-144 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/navitas-solar-nsm540-144/navitas-solar-nsm545-144" image: "https://comparepv.com/og/compare/panels/navitas-solar-nsm540-144/navitas-solar-nsm545-144.png" updated: 2026-09-11 --- # Navitas Solar NSM540-144 vs Navitas Solar NSM545-144 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 | [Navitas Solar NSM540-144](https://comparepv.com/panel/navitas-solar-nsm540-144) | [Navitas Solar NSM545-144](https://comparepv.com/panel/navitas-solar-nsm545-144) | | Manufacturer | Navitas Solar | Navitas Solar | | Power | 540 Wp | 545 Wp | | Efficiency | 20.90 % | 21.09 % | | Technology | PERC | PERC | ## Every compared parameter | Parameter | NSM540-144 | NSM545-144 | | --- | --- | --- | | Rated power | 540 Wp | 545 Wp | | Module efficiency | 20.90 % | 21.09 % | | Power density | 209.0 Wp/m² | 211.0 Wp/m² | | Open-circuit voltage | 50.16 V | 50.30 V | | Voltage at max power | 42.21 V | 42.46 V | | Short-circuit current | 13.60 A | 13.65 A | | Current at max power | 12.79 A | 12.84 A | | Temperature coefficient | -0.360 %/°C | -0.360 %/°C | | Dimensions | 2278x1134x35 mm | 2278x1134x35 mm | | Module area | 2.583 m² | 2.583 m² | | Weight | 29.0 kg | 29.0 kg | | Weight per kWp | 53.7 kg/kWp | 53.2 kg/kWp | | Product warranty | 10 yrs | 10 yrs | | Performance warranty | 25 yrs | 25 yrs | | Annual degradation | - | - | | Cell technology | PERC | PERC | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 144 | 144 | | Bifacial | No | No | ## 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 (-0.360 %/°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, NSM540-144:** 18,118 kWh - **Cumulative output, NSM545-144:** 18,286 kWh - **Gap:** 168 kWh ## Output when hot | Condition | Cell temperature | NSM540-144 | NSM545-144 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 540 W | 545 W | 100.0% of rated power | | Cool, bright day | 40 °C | 511 W | 516 W | 94.6% of rated power | | Typical summer roof | 55 °C | 482 W | 486 W | 89.2% of rated power | | Hot roof | 70 °C | 453 W | 457 W | 83.8% of rated power | ## Against the whole database | Measure | NSM540-144 | NSM545-144 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #10,148 | #9,587 | 14,129 | NSM545-144 leads by 561 places | | Power density | #10,176 | #9,380 | 14,129 | NSM545-144 leads by 796 places | | Heat behaviour | #12,425 | #12,425 | 14,129 | Tied - the same position in the database | | Weight | #7,781 | #7,112 | 14,129 | NSM545-144 leads by 669 places | | Warranty | #9,912 | #9,912 | 14,129 | Tied - the same position in the database | | Overall | #9,391 | #9,030 | 14,129 | NSM545-144 leads by 361 places | ## Questions ### Which panel is better: Navitas Solar NSM540-144 or Navitas Solar NSM545-144? According to our database: **Navitas Solar NSM545-144** has higher module efficiency (**21.09%** vs **20.90%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Navitas Solar NSM540-144 and Navitas Solar NSM545-144? **Navitas Solar NSM540-144** has a module efficiency of **20.90%**, while **Navitas Solar NSM545-144** is **21.09%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Navitas Solar NSM540-144 use vs Navitas Solar NSM545-144? **Navitas Solar NSM540-144** uses **PERC** cells; **Navitas Solar NSM545-144** uses **PERC**. 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 Navitas Solar NSM540-144 and Navitas Solar NSM545-144? **Navitas Solar NSM540-144** has a **25 years** power warranty; **Navitas Solar NSM545-144** has a **25 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. ## Related comparisons - [Navitas Solar NSM540-144 vs Navitas Solar NSM560-144](https://comparepv.com/compare/navitas-solar-nsm540-144/navitas-solar-nsm560-144) - 3 differences, the largest is module efficiency - [Navitas Solar NSM540-144 vs Navitas Solar NSM555-144](https://comparepv.com/compare/navitas-solar-nsm540-144/navitas-solar-nsm555-144) - 3 differences, the largest is module efficiency - [Navitas Solar NSM540-144 vs Navitas Solar NSM550-144](https://comparepv.com/compare/navitas-solar-nsm540-144/navitas-solar-nsm550-144) - 3 differences, the largest is module efficiency - [Navitas Solar NSM540-144 vs Navitas Solar NSM535-144](https://comparepv.com/compare/navitas-solar-nsm540-144/navitas-solar-nsm535-144) - The same specification on paper - [Navitas Solar NSM540-144 vs Navitas Solar NSM530-144](https://comparepv.com/compare/navitas-solar-nsm540-144/navitas-solar-nsm530-144) - 3 differences, the largest is module efficiency - [Navitas Solar NSM540-144 vs Navitas Solar NSM525-144](https://comparepv.com/compare/navitas-solar-nsm540-144/navitas-solar-nsm525-144) - 3 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/navitas-solar-nsm540-144/navitas-solar-nsm545-144 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.