--- title: "Jetion JT780SXt(B) vs Jetion JT785SXt(B) - Solar Panel Comparison | ComparePV" description: "Compare Jetion JT780SXt(B) vs Jetion JT785SXt(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-jt780sxt-b/jetion-jt785sxt-b" updated: 2026-09-11 --- # Jetion JT780SXt(B) vs Jetion JT785SXt(B) Identical on every published parameter All 19 comparable parameters agree. 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 | [Jetion JT780SXt(B)](https://comparepv.com/panel/jetion-jt780sxt-b) | [Jetion JT785SXt(B)](https://comparepv.com/panel/jetion-jt785sxt-b) | | Manufacturer | Jetion | Jetion | | Power | 780 Wp | 785 Wp | | Efficiency | 23.10 % | 23.20 % | | Technology | TOPCon | TOPCon | ## Every compared parameter | Parameter | JT780SXt(B) | JT785SXt(B) | | --- | --- | --- | | Rated power | 780 Wp | 785 Wp | | Module efficiency | 23.10 % | 23.20 % | | Power density | 230.7 Wp/m² | 232.2 Wp/m² | | Open-circuit voltage | 53.60 V | 53.79 V | | Voltage at max power | 45.10 V | 45.24 V | | Short-circuit current | 18.50 A | 18.56 A | | Current at max power | 17.30 A | 17.35 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 2595x1303x33 mm | 2595x1303x33 mm | | Module area | 3.381 m² | 3.381 m² | | Weight | 40.0 kg | 40.0 kg | | Weight per kWp | 51.3 kg/kWp | 51.0 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 | 144 | 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, JT780SXt(B):** 26,171 kWh - **Cumulative output, JT785SXt(B):** 26,338 kWh - **Gap:** 167 kWh ## Output when hot | Condition | Cell temperature | JT780SXt(B) | JT785SXt(B) | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 780 W | 785 W | 100.0% of rated power | | Cool, bright day | 40 °C | 746 W | 751 W | 95.7% of rated power | | Typical summer roof | 55 °C | 712 W | 717 W | 91.3% of rated power | | Hot roof | 70 °C | 678 W | 683 W | 87.0% of rated power | ## Against the whole database | Measure | JT780SXt(B) | JT785SXt(B) | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #1,570 | #1,306 | 14,005 | JT785SXt(B) leads by 264 places | | Power density | #1,683 | #1,338 | 14,005 | JT785SXt(B) leads by 345 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #4,670 | #4,327 | 14,005 | JT785SXt(B) leads by 343 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #129 | #106 | 14,005 | JT785SXt(B) leads by 23 places | ## Questions ### Which panel is better: Jetion JT780SXt(B) or Jetion JT785SXt(B)? According to our database: **Jetion JT785SXt(B)** has higher module efficiency (**23.20%** vs **23.10%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Jetion JT780SXt(B) and Jetion JT785SXt(B)? **Jetion JT780SXt(B)** has a module efficiency of **23.10%**, while **Jetion JT785SXt(B)** is **23.20%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Jetion JT780SXt(B) use vs Jetion JT785SXt(B)? **Jetion JT780SXt(B)** uses **TOPCon** cells; **Jetion JT785SXt(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 JT780SXt(B) and Jetion JT785SXt(B)? **Jetion JT780SXt(B)** has a **30 years** power warranty; **Jetion JT785SXt(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 JT780SXt(B) and Jetion JT785SXt(B) bifacial panels? Both **Jetion JT780SXt(B)** and **Jetion JT785SXt(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 JT780SXt(B) vs Jetion JT800SXt(B)](https://comparepv.com/compare/jetion-jt780sxt-b/jetion-jt800sxt-b) - 3 differences, the largest is module efficiency - [Jetion JT780SXt(B) vs Jetion JT795SXt(B)](https://comparepv.com/compare/jetion-jt780sxt-b/jetion-jt795sxt-b) - 3 differences, the largest is module efficiency - [Jetion JT780SXt(B) vs Jetion JT790SXt(B)](https://comparepv.com/compare/jetion-jt780sxt-b/jetion-jt790sxt-b) - 2 differences, the largest is module efficiency - [Jetion JT780SXt(B) vs Jetion JT775SXt(B)](https://comparepv.com/compare/jetion-jt780sxt-b/jetion-jt775sxt-b) - One difference: module efficiency - [Jetion JT780SXt(B) vs Jetion JT755SLk(B)](https://comparepv.com/compare/jetion-jt780sxt-b/jetion-jt755slk-b) - 14 differences, the largest is module efficiency - [Jetion JT780SXt(B) vs Jetion JT750SLk(B)](https://comparepv.com/compare/jetion-jt780sxt-b/jetion-jt750slk-b) - 14 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/jetion-jt780sxt-b/jetion-jt785sxt-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.