--- title: "Jetion JT440SYk(B) 440W Solar Panel - Specs & Review | ComparePV" description: "Jetion JT440SYk(B) 440W solar panel. Specs: 22.90% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/jetion-jt440syk-b-1" updated: 2026-09-11 --- # Jetion JT440SYk(B) Space saver, no clear weak spot 113 panels in the segment HJT 400-450 W ## Identity - **Manufacturer:** Jetion - **Model:** JT440SYk(B) - **Series:** JT SYk(B) - **Rated power:** 440 W - **Cell technology:** HJT - **Bifacial:** yes ## How it compares Compared against segment HJT 400-450 W (113 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 440 W | 435 W | Typical | | | Module efficiency | 22.90% | 22.20% | Strong - top 3% | 2,359 | | Power density | 229.4 | 221.6 | Strong - top 1% | 2,333 | | Temperature coefficient | -0.240 | -0.240 | Typical | 13 | | Weight (kg) | 23.0 kg | 23.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.90% | 22.20% | Strong - top 3% | 2,359 | | Power density | 229.4 | 221.6 | Strong - top 1% | 2,333 | | Temperature coefficient | -0.240 | -0.240 | Typical | 13 | | Weight per kWp | 52.3 | 52.4 | Typical | 5,732 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **229.4 watts per square metre** - Top 1% of the HJT 400-450 W segment, against a median of 221.6. Ranked 2,333rd in the whole database. - **22.90% module efficiency** - Top 3% of the HJT 400-450 W segment, against a median of 22.20%. Ranked 2,359th in the whole database. - **Best for:** Residential, commercial and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 440 W - **Efficiency:** 22.90 % - **Voltage at Pmax (Vmp):** 25.80 V - **Current at Pmax (Imp):** 17.06 A - **Open-circuit voltage (Voc):** 30.70 V - **Short-circuit current (Isc):** 17.92 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.240 %/degC - **Temperature coefficient of Voc:** -0.240 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** HJT - **Cell count:** 80 - **Bifacial:** yes - **Bifacial gain:** 30.00 ### Physical - **Length:** 1750 mm - **Width:** 1096 mm - **Thickness:** 30 mm - **Weight:** 23.0 kg - **Area:** 1.92 m2 - **Power density:** 229.4 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 90.3 % - **Output after 30 years:** 397 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 2359 of 14005 | | Power density | 2333 of 14005 | | Temperature coefficient | 13 of 14005 | | Weight | 5732 of 14005 | | Warranty | 21 of 14005 | ## Pros - **High HJT cell efficiency** - Efficiency up to 22.9% places the JT SYk(B) series at the top of the peer set - ahead of Lina Energy LEPV 132 ULTRA PREMIUM (22.37%) and JA Solar JAM54D40 (22.5%), and close to Luxor Solar ECO LINE TOPCon (22.86%). N-type HJT cells offer a lower temperature coefficient than legacy PERC or TOPCon, delivering a real yield advantage during summer months. - **Dual-glass bifacial construction** - Bifacial modules with POE encapsulation capture additional energy from albedo (relevant on light-colored roofs, gravel, or ground-mount structures), while practically eliminating PID and LID degradation risk over the module's lifetime. - **30-year linear power warranty** - The manufacturer guarantees power retention over 30 years, standing out against many comparable modules that typically offer 25 years. Combined with Tier-1 bankable status, this is a strong argument for project financing on utility-scale installations. - **High mechanical load resistance** - Rated load capacity of up to 5400 Pa (snow) and 2400 Pa (wind) makes the series suitable both for sloped roofs in harsh winter conditions and for PV farms with elevated structural requirements, typical of the Polish climate. - **Established manufacturer since 2004** - Jetion has operated in the PV market since 2004 and holds Tier-1 bankable status, reducing risk for investors compared with lesser-known manufacturers newly entering the European market. ## Cons - **Standard, not extended, product warranty** - The 15-year product warranty is a baseline value for the premium HJT/TOPCon segment - some competing Tier-1 series (e.g., from JA Solar or Luxor Solar) are moving to a 20-25 year product warranty standard in 2025-2026, so despite the strong power warranty, the product warranty itself does not differentiate the JT SYk(B) series in the market. ## About this series The JT SYk(B) series combines bifacial **heterojunction (HJT)** cells built on N-type wafers with a **dual-glass** construction, giving installers a module engineered for stable long-term performance in demanding climates. Half-cut cells paired with a multi-busbar layout reduce resistive losses and lower the risk of microcracks, translating into more reliable operation across the system's lifetime. This design is especially attractive for investors looking to maximize energy yield from limited roof or ground space - **bifacial energy harvesting** captures reflected light from the surface below, which matters most on light-colored roofs, gravel surfaces, or elevated ground-mount structures. The panels also perform well under low-irradiance conditions, a relevant advantage in a climate with frequent overcast days. The glass-glass build with POE encapsulation virtually eliminates PID and LID degradation risk, backed by the manufacturer's **30-year linear power warranty** and 15-year product warranty. Mechanical durability supports snow loads up to 5400 Pa and wind loads up to 2400 Pa, making the series suitable for both pitched residential roofs and utility-scale installations with elevated structural requirements. ## Notable figures - 22.9% module efficiency - 0.7pp better than the \*\*HJT 400-450W\*\* median of 22.2% - At 229.4 W/m² power density, this panel generates 7.8 W/m² more per unit area than \*\*HJT 400-450W\*\* median (221.6 W/m²) - Temperature coefficient of -0.24%/°C matches the \*\*HJT 400-450W\*\* median - Bifacial design (85% factor) captures reflected light - adds 4-13% yield on ground-mount or white roof - Ranked #2359 out of 14005 panels for efficiency in the database ## Questions ### How does the HJT cell technology in Jetion JT SYk(B) panels differ from popular PERC or TOPCon modules? HJT (heterojunction) combines a crystalline silicon layer with thin layers of amorphous silicon, delivering higher efficiency and a lower temperature coefficient than PERC. Compared to TOPCon, HJT typically shows a lower temperature coefficient and slower degradation over time, resulting in higher energy yield on hot days and more stable performance throughout the system's operating life. ### Does the bifacial JT SYk(B) panel actually generate more energy than a standard monofacial module? Yes, thanks to bifacial cells the panel captures additional energy from light reflected off the ground, roof, or surrounding surfaces on its rear side. The actual gain depends on the albedo of the mounting surface and the module's elevation - on light-colored gravel or ground-mounted structures, the extra yield can add several to over ten percent compared to a monofacial panel of the same rated power. ### What warranty comes with Jetion JT SYk(B) panels and what does it cover exactly? The manufacturer offers a 15-year product warranty covering material and workmanship defects, plus a 30-year linear power warranty guaranteeing a minimum energy output level over the years of operation. Thanks to POE encapsulation and the dual-glass construction, the risk of PID and LID degradation is significantly reduced, which realistically supports meeting the terms of this long warranty. ### Can JT SYk(B) panels withstand heavy snow loads in harsh winter climates? Yes, the JT SYk(B) series has a certified snow load rating of up to 5400 Pa, well above typical roof requirements in colder climates. It also withstands wind loads up to 2400 Pa, making the panels suitable for both sloped roofs in high-snowfall regions and utility-scale solar farms exposed to strong winds. ### Does the dual-glass construction of Jetion panels require special mounting compared to standard backsheet modules? Dual-glass construction is heavier and more rigid than backsheet modules, so it's worth checking the mounting structure's load capacity and using clamps sized for the panel's thickness. Otherwise installation is standard - the dual-glass design additionally boosts mechanical durability and lifespan by eliminating the delamination risk typical of backsheet laminates. ### What type of installation is the 440 Wp JT SYk(B) panel best suited for? A 440 Wp panel with HJT technology and bifacial capability is especially well suited where maximizing energy yield from limited space matters - for example, small sloped roofs, ground-mounted structures, carports, or solar farms on light-colored ground. The high power output per module also reduces the number of panels needed to reach a target system capacity. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/9ab3bea00d584dd19ad411c31a67c203-79a88595af71.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +50 W, hotter, +1.6 pp | | [Suntech STP-NT11/48QGSF-490](https://comparepv.com/panel/suntech-stp-nt11-48qgsf-490) | 490 W | +50 W, hotter, +1.6 pp | | [JA Solar JAT54S40-485/LR](https://comparepv.com/panel/ja-solar-jat54s40-485-lr) | 485 W | +45 W, lighter, +1.4 pp | | [AIKO AIKO-A485-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a485-mce54mw) | 485 W | +45 W, hotter, +1.4 pp | | [AIKO AIKO-A485-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a485-mah54mw) | 485 W | +45 W, hotter, +1.4 pp | | [Gokin GK-5-54HG-485M](https://comparepv.com/panel/gokin-gk-5-54hg-485m) | 485 W | +45 W, hotter, +1.4 pp | | [Heckert Solar ZEUS 3.0+ 108 485WP](https://comparepv.com/panel/heckert-solar-zeus-3-0-108-485wp) | 485 W | +45 W, hotter, +1.4 pp | | [Jetion JT420SYk(B)](https://comparepv.com/panel/jetion-jt420syk-b) | 420 W | -20 W, -1.0 pp | | [Jetion JT425SYk(B)](https://comparepv.com/panel/jetion-jt425syk-b) | 425 W | -15 W, -0.8 pp | | [Jetion JT430SYk(B)](https://comparepv.com/panel/jetion-jt430syk-b) | 430 W | -10 W, -0.5 pp | | [Jetion JT435SYk(B)](https://comparepv.com/panel/jetion-jt435syk-b) | 435 W | Very close match | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +70 W, +2.1 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +55 W, hotter, +1.9 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +65 W, +1.8 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +60 W, +1.6 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +60 W, hotter, +1.6 pp | --- Source: https://comparepv.com/panel/jetion-jt440syk-b-1 Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.