--- title: "Jetion JT440SEt(L) Solar Panel: Specs & Datasheet | ComparePV" description: "Jetion JT440SEt(L) solar panel. Specs: 22.50% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/jetion-jt440set-l" image: "https://comparepv.com/og/panel/jetion-jt440set-l.png" updated: 2026-09-11 --- # Jetion JT440SEt(L) Light for its output, short guarantee 1,220 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** Jetion - **Model:** JT440SEt(L) - **Series:** JT SEt(L) 420-440W - **Rated power:** 440 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 400-450 W (1220 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 440 W | 435 W | Typical | | | Module efficiency | 22.50% | 22.00% | Strong - top 9% | 4,281 | | Power density | 225.7 | 220.2 | Strong - top 4% | 3,908 | | Temperature coefficient | -0.300 | -0.290 | Typical | 6,152 | | Weight (kg) | 13.1 kg | 22.0 kg | Strong - top 1% | | | Performance warranty | 20 yrs | 30 yrs | Weak - bottom 1% | 13,920 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.50% | 22.00% | Strong - top 9% | 4,281 | | Power density | 225.7 | 220.2 | Strong - top 4% | 3,908 | | Temperature coefficient | -0.300 | -0.290 | Typical | 6,152 | | Weight per kWp | 29.8 | 51.5 | Strong - top 1% | 133 | | Performance warranty | 20 yrs | 30 yrs | Weak - bottom 1% | 13,920 | ### Strengths - **29.8 kg per kWp** - Top 1% of the TOPCon 400-450 W segment, against a median of 51.5. Ranked 133rd in the whole database. - **225.7 watts per square metre** - Top 4% of the TOPCon 400-450 W segment, against a median of 220.2. Ranked 3,908th in the whole database. - **22.50% module efficiency** - Top 9% of the TOPCon 400-450 W segment, against a median of 22.00%. Ranked 4,281st in the whole database. ### Watch out for - **20 year performance warranty** - Bottom 1% of the TOPCon 400-450 W segment, against a median of 30 yrs. Ranked 13,920th in the whole database. - **Best for:** Residential and commercial. - **Not ideal for:** Owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 440 W - **Efficiency:** 22.50 % - **Voltage at Pmax (Vmp):** 32.00 V - **Current at Pmax (Imp):** 13.75 A - **Open-circuit voltage (Voc):** 38.60 V - **Short-circuit current (Isc):** 14.49 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.300 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.045 %/degC - **NOCT:** 42 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 108 ### Physical - **Length:** 1721 mm - **Width:** 1133 mm - **Thickness:** 19 mm - **Weight:** 13.1 kg - **Area:** 1.95 m2 - **Power density:** 225.7 Wp/m2 ### Warranty and degradation - **Product warranty:** 10 years - **Performance warranty:** 20 years - **Output guaranteed at end of warranty:** 89.0 % - **First-year degradation:** 1.50 % - **Annual degradation:** 0.50 % - **Output after 30 years:** 370 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 4281 of 14129 | | Power density | 3908 of 14129 | | Temperature coefficient | 6152 of 14129 | | Weight | 133 of 14129 | | Warranty | 13920 of 14129 | ## Pros - **N-type TOPCon cells with dual EL inspection** - 108 half-cut N-type TOPCon cells combined with a dual 100% electroluminescence (EL) inspection and PID-resistant cell processing deliver a low LID/LETID degradation rate and minimize the risk of microcracks compared to conventional PERC modules. - **22.5% efficiency near the top of its peer group** - The 22.5% efficiency matches JA Solar's JAM54D40 (22.5%) and exceeds Lina Energy's LEPV 132 ULTRA PREMIUM (22.37%) at the same 440 Wp power class, though it trails Luxor Solar's ECO LINE (22.86%) - placing it in the upper half of comparable offerings. - **Tier-1 manufacturer with BNEF certification** - Jetion Solar has operated since 2004 and has been confirmed as Tier-1 on the BloombergNEF Module Maker Tiering System, reducing bankability risk and easing project financing through banks and funds. - **Lightweight design eases installation** - The module weighs approximately 13.1 kg, lighter than typical dual-glass modules of comparable power - this simplifies transport and mounting, lowering labor costs, particularly on roofs with limited load-bearing capacity. - **Low temperature coefficient** - The Pmax temperature coefficient of -0.30%/°C is favorable versus conventional PERC modules (typically -0.35% to -0.40%/°C), translating into a higher energy yield in hot climates and during summer months. ## Cons - **Production discontinued** - The JT SEt(L) 420-440W series, launched in 2022, has been discontinued. This implies limited future availability of spare parts and warranty servicing, a meaningful risk given the 20-30 year expected lifetime of PV installations. - **Warranty below current N-type TOPCon standard** - The 10-year product and 20-year power warranty (89% power retention at 20 years per manufacturer data) is noticeably shorter than what has become standard for N-type TOPCon modules today, where 12-15 year product and 25-30 year linear power warranties with over 87% retention at 30 years are now common. ## About this series The JT SEt(L) 420-440W series is built around 108 **N-type TOPCon half-cut cells** with a multi-busbar grid, delivering high conversion efficiency and stable performance even under diffuse light conditions. Thanks to N-type cell technology, these panels feature **low LID/LETID degradation**, retaining strong output across their entire service life rather than losing performance sharply in the early years. The manufacturer has also addressed PID resistance by optimizing the cell production process and using advanced encapsulation materials, which combined with **double 100% EL inspection** ensures high reliability and minimizes the risk of micro-cracks or hidden defects. This makes the series especially appealing for projects on roofs with limited load-bearing capacity or in locations with less-than-ideal solar exposure, where every extra kilowatt-hour matters. The series also stands out for its **lightweight construction**, which simplifies transport and installation and reduces labor costs compared to conventional dual-glass modules. The JT SEt(L) 420-440W is designed for installers and developers seeking a balance of efficiency, durability, and ease of deployment across both commercial and residential installations. ## Notable figures - Efficiency of 22.5% matches the \*\*TOPCon 400-450W\*\* median - At 225.7 W/m² power density, this panel generates 5.5 W/m² more per unit area than \*\*TOPCon 400-450W\*\* median (220.2 W/m²) - At -0.30%/°C, hot weather performance is typical for \*\*TOPCon 400-450W\*\* panels - 13.1 kg weight - 8.9 kg lighter than \*\*TOPCon 400-450W\*\* median (22.0 kg), reducing installation effort - #4281 for efficiency, #6152 for temperature performance out of 14129 panels ## Questions ### Is the Jetion JT SEt(L) 420-440W series still available for purchase? The JT SEt(L) 420-440W series has been discontinued by Jetion and is no longer offered as a current model in the manufacturer's lineup. Remaining warehouse stock may still be available through distributors, but availability should be confirmed before planning a larger project, as sourcing identical modules in the future may no longer be possible. ### What warranty comes with Jetion JT SEt(L) 420-440W panels? The manufacturer provides a 10-year product warranty covering material and workmanship defects, plus a 20-year power performance warranty guaranteeing the module maintains its rated energy output. While slightly shorter than the 25-30 years offered by market leaders, it still provides solid protection for the investment when purchasing these panels. ### What is N-type TOPCon technology and how does it differ from PERC in Jetion panels? TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell technology that uses an additional passivation layer to reduce carrier recombination and boost conversion efficiency compared to older P-type PERC cells. In JT SEt(L) panels this translates into higher power output, lower degradation over time, and better performance under weak or diffuse light, such as on overcast days. ### Are Jetion JT SEt(L) panels resistant to microcracks and hidden defects? Yes, the manufacturer applies double 100% EL (electroluminescence) inspection during production, allowing detection of cell microcracks and other hidden defects before shipment. Combined with a production process optimized for PID resistance, this improves module reliability over the long-term operating life. ### Are JT SEt(L) 420-440W panels suitable for roofs with limited load capacity? Yes, the series features a lightweight construction compared to classic dual-glass modules, making it a good choice for roofs with limited load-bearing capacity, such as older outbuildings or industrial sheds. The reduced weight also simplifies transport and installation, lowering labor costs during setup. ### Is Jetion a Tier 1 manufacturer and where is it based? Yes, Jetion is classified as a Tier 1 manufacturer, indicating financial stability and a documented, multi-year track record of supplying modules to large commercial and bank-financed projects. The company is headquartered in China, where its main cell and module production facilities are located. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/dbadf3b9e20240109e34e0489591110d-ce4f63f11e89.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Heavier, +2.0 pp, +10 yr warranty | | [Suntech STP-NT11/48QGSF-490](https://comparepv.com/panel/suntech-stp-nt11-48qgsf-490) | 490 W | Heavier, +2.0 pp, +10 yr warranty | | [JA Solar JAT54S40-485/LR](https://comparepv.com/panel/ja-solar-jat54s40-485-lr) | 485 W | Heavier, +1.8 pp, +10 yr warranty | | [AIKO AIKO-A485-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a485-mce54mw) | 485 W | Heavier, +1.8 pp, +10 yr warranty | | [AIKO AIKO-A485-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a485-mah54mw) | 485 W | Heavier, +1.8 pp, +10 yr warranty | | [Gokin GK-5-54HG-485M](https://comparepv.com/panel/gokin-gk-5-54hg-485m) | 485 W | Heavier, +1.8 pp, +10 yr warranty | | [Heckert Solar ZEUS 3.0+ 108 485WP](https://comparepv.com/panel/heckert-solar-zeus-3-0-108-485wp) | 485 W | Heavier, +1.8 pp, +10 yr warranty | | [Jetion JT410SJt(B)](https://comparepv.com/panel/jetion-jt410sjt-b) | 410 W | Heavier, -1.5 pp, +10 yr warranty | | [Jetion JT415SJt(B)](https://comparepv.com/panel/jetion-jt415sjt-b) | 415 W | Heavier, -1.2 pp, +10 yr warranty | | [Jetion JT420SEt(L)](https://comparepv.com/panel/jetion-jt420set-l) | 420 W | -20 W, -1.0 pp | | [Jetion JT420SJt(B)](https://comparepv.com/panel/jetion-jt420sjt-b) | 420 W | Heavier, -1.0 pp, +10 yr warranty | | [Jetion JT425SJt(B)](https://comparepv.com/panel/jetion-jt425sjt-b) | 425 W | Heavier, -0.7 pp, +10 yr warranty | | [Jetion JT425SEt(L)](https://comparepv.com/panel/jetion-jt425set-l) | 425 W | -15 W, -0.7 pp | | [Jetion JT430SEt(L)](https://comparepv.com/panel/jetion-jt430set-l) | 430 W | -10 W, -0.5 pp | | [Jetion JT430SJt(B)](https://comparepv.com/panel/jetion-jt430sjt-b) | 430 W | Heavier, -0.5 pp, +10 yr warranty | | [Jetion JT435SEt(L)](https://comparepv.com/panel/jetion-jt435set-l) | 435 W | Very close match | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Heavier, +2.5 pp, +10 yr warranty | --- Source: https://comparepv.com/panel/jetion-jt440set-l Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.