--- title: "Jetion JT440SNt(B) vs Jetion JT450SNt(B) - Solar Panel Comparison | ComparePV" description: "Compare Jetion JT440SNt(B) vs Jetion JT450SNt(B) side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/jetion-jt440snt-b/jetion-jt450snt-b" updated: 2026-09-12 --- # Jetion JT440SNt(B) vs Jetion JT450SNt(B) JT450SNt(B) leads on the differences that matter The largest is module efficiency: 0.50 pp more efficient. 16 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Jetion JT440SNt(B)](https://comparepv.com/panel/jetion-jt440snt-b) | [Jetion JT450SNt(B)](https://comparepv.com/panel/jetion-jt450snt-b) | | Manufacturer | Jetion | Jetion | | Power | 440 Wp | 450 Wp | | Efficiency | 22.00 % | 22.50 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | JT440SNt(B) | JT450SNt(B) | Difference | | --- | --- | --- | --- | | Module efficiency | 22.00 % | 22.50 % | +0.50 pp for JT450SNt(B) | | Power density | 220.2 Wp/m² | 225.2 Wp/m² | +5.0 Wp/m² for JT450SNt(B) | | Rated power | 440 Wp | 450 Wp | +10 W for JT450SNt(B) | ## Every compared parameter | Parameter | JT440SNt(B) | JT450SNt(B) | | --- | --- | --- | | Rated power | 440 Wp | 450 Wp | | Module efficiency | 22.00 % | 22.50 % | | Power density | 220.2 Wp/m² | 225.2 Wp/m² | | Open-circuit voltage | 35.30 V | 35.70 V | | Voltage at max power | 29.50 V | 29.89 V | | Short-circuit current | 15.92 A | 16.06 A | | Current at max power | 14.92 A | 15.06 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 1762x1134x30 mm | 1762x1134x30 mm | | Module area | 1.998 m² | 1.998 m² | | Weight | 23.7 kg | 23.7 kg | | Weight per kWp | 53.9 kg/kWp | 52.7 kg/kWp | | Product warranty | 12 yrs | 12 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 | 96 | 96 | | 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 (-0.290 %/°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, JT440SNt(B):** 14,763 kWh - **Cumulative output, JT450SNt(B):** 15,098 kWh - **Gap:** 335 kWh ## Output when hot | Condition | Cell temperature | JT440SNt(B) | JT450SNt(B) | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 440 W | 450 W | 100.0% of rated power | | Cool, bright day | 40 °C | 421 W | 430 W | 95.7% of rated power | | Typical summer roof | 55 °C | 402 W | 411 W | 91.3% of rated power | | Hot roof | 70 °C | 383 W | 391 W | 87.0% of rated power | ## Against the whole database | Measure | JT440SNt(B) | JT450SNt(B) | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #6,517 | #4,222 | 14,005 | JT450SNt(B) leads by 2,295 places | | Power density | #6,328 | #4,225 | 14,005 | JT450SNt(B) leads by 2,103 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #8,009 | #6,288 | 14,005 | JT450SNt(B) leads by 1,721 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #9,829 | #9,075 | 14,005 | JT450SNt(B) leads by 754 places | ## Questions ### Which panel is better: Jetion JT440SNt(B) or Jetion JT450SNt(B)? According to our database: **Jetion JT450SNt(B)** has higher module efficiency (**22.50%** vs **22.00%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Jetion JT440SNt(B) and Jetion JT450SNt(B)? **Jetion JT440SNt(B)** has a module efficiency of **22.00%**, while **Jetion JT450SNt(B)** is **22.50%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Jetion JT440SNt(B) use vs Jetion JT450SNt(B)? **Jetion JT440SNt(B)** uses **TOPCon** cells; **Jetion JT450SNt(B)** 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 Jetion JT440SNt(B) and Jetion JT450SNt(B)? **Jetion JT440SNt(B)** has a **30 years** power warranty; **Jetion JT450SNt(B)** 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 Jetion JT440SNt(B) and Jetion JT450SNt(B) bifacial panels? Both **Jetion JT440SNt(B)** and **Jetion JT450SNt(B)** 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 - [Jetion JT440SNt(B) vs Jetion JT460SNt(B)](https://comparepv.com/compare/jetion-jt440snt-b/jetion-jt460snt-b) - 4 differences, the largest is module efficiency - [Jetion JT440SNt(B) vs Jetion JT455SNt(B)](https://comparepv.com/compare/jetion-jt440snt-b/jetion-jt455snt-b) - 3 differences, the largest is module efficiency - [Jetion JT440SNt(B) vs Jetion JT445SNt(B)](https://comparepv.com/compare/jetion-jt440snt-b/jetion-jt445snt-b) - One difference: module efficiency - [Jetion JT440SNt(B) vs Jetion JT800SXt(B)](https://comparepv.com/compare/jetion-jt440snt-b/jetion-jt800sxt-b) - 12 differences, the largest is module efficiency - [Jetion JT440SNt(B) vs Jetion JT795SXt(B)](https://comparepv.com/compare/jetion-jt440snt-b/jetion-jt795sxt-b) - 12 differences, the largest is module efficiency - [Jetion JT440SNt(B) vs Jetion JT790SXt(B)](https://comparepv.com/compare/jetion-jt440snt-b/jetion-jt790sxt-b) - 12 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/jetion-jt440snt-b/jetion-jt450snt-b 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.