--- title: "Jetion JT450SNt(B) vs Jetion JT790SXt(B) - Solar Panel Comparison | ComparePV" description: "Compare Jetion JT450SNt(B) vs Jetion JT790SXt(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-jt450snt-b/jetion-jt790sxt-b" updated: 2026-09-12 --- # Jetion JT450SNt(B) vs Jetion JT790SXt(B) JT790SXt(B) leads on the differences that matter The largest is module efficiency: 0.90 pp more efficient. 7 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Jetion JT450SNt(B)](https://comparepv.com/panel/jetion-jt450snt-b) | [Jetion JT790SXt(B)](https://comparepv.com/panel/jetion-jt790sxt-b) | | Manufacturer | Jetion | Jetion | | Power | 450 Wp | 790 Wp | | Efficiency | 22.50 % | 23.40 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | JT450SNt(B) | JT790SXt(B) | Difference | | --- | --- | --- | --- | | Module efficiency | 22.50 % | 23.40 % | +0.90 pp for JT790SXt(B) | | Rated power | 450 Wp | 790 Wp | +340 W for JT790SXt(B) | | Weight | 23.7 kg | 40.0 kg | -16.3 kg for JT450SNt(B) | | Power density | 225.2 Wp/m² | 233.6 Wp/m² | +8.4 Wp/m² for JT790SXt(B) | | Open-circuit voltage | 35.70 V | 53.98 V | 18.28 V apart | | Short-circuit current | 16.06 A | 18.61 A | 2.55 A apart | | Module area | 1.998 m² | 3.381 m² | 1.383 m² apart | | Voltage at max power | 29.89 V | 45.39 V | 15.50 V apart | | Current at max power | 15.06 A | 17.41 A | 2.35 A apart | | Cell count | 96 | 144 | 48 cells apart | | Weight per kWp | 52.7 kg/kWp | 50.6 kg/kWp | -2.0 kg/kWp for JT790SXt(B) | | Dimensions | 1762x1134x30 mm | 2595x1303x33 mm | 1762x1134x30 mm vs 2595x1303x33 mm | ## Every compared parameter | Parameter | JT450SNt(B) | JT790SXt(B) | | --- | --- | --- | | Rated power | 450 Wp | 790 Wp | | Module efficiency | 22.50 % | 23.40 % | | Power density | 225.2 Wp/m² | 233.6 Wp/m² | | Open-circuit voltage | 35.70 V | 53.98 V | | Voltage at max power | 29.89 V | 45.39 V | | Short-circuit current | 16.06 A | 18.61 A | | Current at max power | 15.06 A | 17.41 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 1762x1134x30 mm | 2595x1303x33 mm | | Module area | 1.998 m² | 3.381 m² | | Weight | 23.7 kg | 40.0 kg | | Weight per kWp | 52.7 kg/kWp | 50.6 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 | 144 | | 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, JT450SNt(B):** 15,098 kWh - **Cumulative output, JT790SXt(B):** 26,506 kWh - **Gap:** 11,408 kWh ## Output when hot | Condition | Cell temperature | JT450SNt(B) | JT790SXt(B) | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 450 W | 790 W | 100.0% of rated power | | Cool, bright day | 40 °C | 430 W | 756 W | 95.7% of rated power | | Typical summer roof | 55 °C | 411 W | 721 W | 91.3% of rated power | | Hot roof | 70 °C | 391 W | 687 W | 87.0% of rated power | ## Against the whole database | Measure | JT450SNt(B) | JT790SXt(B) | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #4,222 | #882 | 14,005 | JT790SXt(B) leads by 3,340 places | | Power density | #4,225 | #928 | 14,005 | JT790SXt(B) leads by 3,297 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #6,288 | #4,073 | 14,005 | JT790SXt(B) leads by 2,215 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #9,075 | #76 | 14,005 | JT790SXt(B) leads by 8,999 places | ## Questions ### Which panel is better: Jetion JT450SNt(B) or Jetion JT790SXt(B)? According to our database: **Jetion JT790SXt(B)** has higher module efficiency (**23.40%** vs **22.50%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Jetion JT450SNt(B) and Jetion JT790SXt(B)? **Jetion JT450SNt(B)** has a module efficiency of **22.50%**, while **Jetion JT790SXt(B)** is **23.40%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Jetion JT450SNt(B) use vs Jetion JT790SXt(B)? **Jetion JT450SNt(B)** uses **TOPCon** cells; **Jetion JT790SXt(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 JT450SNt(B) and Jetion JT790SXt(B)? **Jetion JT450SNt(B)** has a **30 years** power warranty; **Jetion JT790SXt(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 JT450SNt(B) and Jetion JT790SXt(B) bifacial panels? Both **Jetion JT450SNt(B)** and **Jetion JT790SXt(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 JT450SNt(B) vs Jetion JT460SNt(B)](https://comparepv.com/compare/jetion-jt450snt-b/jetion-jt460snt-b) - 3 differences, the largest is module efficiency - [Jetion JT450SNt(B) vs Jetion JT455SNt(B)](https://comparepv.com/compare/jetion-jt450snt-b/jetion-jt455snt-b) - One difference: module efficiency - [Jetion JT450SNt(B) vs Jetion JT445SNt(B)](https://comparepv.com/compare/jetion-jt450snt-b/jetion-jt445snt-b) - One difference: module efficiency - [Jetion JT450SNt(B) vs Jetion JT440SNt(B)](https://comparepv.com/compare/jetion-jt450snt-b/jetion-jt440snt-b) - 3 differences, the largest is module efficiency - [Jetion JT790SXt(B) vs Jetion JT800SXt(B)](https://comparepv.com/compare/jetion-jt790sxt-b/jetion-jt800sxt-b) - 2 differences, the largest is module efficiency - [Jetion JT790SXt(B) vs Jetion JT795SXt(B)](https://comparepv.com/compare/jetion-jt790sxt-b/jetion-jt795sxt-b) - The same specification on paper --- Source: https://comparepv.com/compare/jetion-jt450snt-b/jetion-jt790sxt-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.