--- title: "Jetion JT635SLt(B) 635W Solar Panel - Specs & Review | ComparePV" description: "Jetion JT635SLt(B) 635W solar panel. Specs: 23.50% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/jetion-jt635slt-b" updated: 2026-09-11 --- # Jetion JT635SLt(B) Space saver, no clear weak spot 1,086 panels in the segment TOPCon 600-650 W ## Identity - **Manufacturer:** Jetion - **Model:** JT635SLt(B) - **Series:** JT SLt(B) 620-650W - **Rated power:** 635 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 600-650 W (1086 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 635 W | 620 W | Strong - top 16% | | | Module efficiency | 23.50% | 22.80% | Strong - top 10% | 716 | | Power density | 235.1 | 227.7 | Strong - top 9% | 741 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 32.3 kg | 32.7 kg | Strong - top 24% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.50% | 22.80% | Strong - top 10% | 716 | | Power density | 235.1 | 227.7 | Strong - top 9% | 741 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 50.9 | 53.1 | Strong - top 24% | 4,252 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **235.1 watts per square metre** - Top 9% of the TOPCon 600-650 W segment, against a median of 227.7. Ranked 741st in the whole database. - **23.50% module efficiency** - Top 10% of the TOPCon 600-650 W segment, against a median of 22.80%. Ranked 716th in the whole database. - **50.9 kg per kWp** - Top 24% of the TOPCon 600-650 W segment, against a median of 53.1. - **Best for:** Commercial, utility-scale and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 635 W - **Efficiency:** 23.50 % - **Voltage at Pmax (Vmp):** 41.20 V - **Current at Pmax (Imp):** 15.42 A - **Open-circuit voltage (Voc):** 49.55 V - **Short-circuit current (Isc):** 16.26 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.240 %/degC - **Temperature coefficient of Isc:** 0.045 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 132 - **Bifacial:** yes - **Bifacial gain:** 25.00 ### Physical - **Length:** 2382 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 32.3 kg - **Area:** 2.70 m2 - **Power density:** 235.1 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 555 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 716 of 14005 | | Power density | 741 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 4252 of 14005 | | Warranty | 21 of 14005 | ## Pros - **N-type TOPCon half-cut cells** - Monocrystalline N-TOPCon half-cut cells reduce partial-shading losses and deliver a lower LID/LeTID degradation rate than older PERC technology, resulting in higher and more stable energy yield over the system's lifetime. - **Bifacial technology boosts energy yield** - The dual-glass bifacial design captures reflected (albedo) radiation from the ground surface, potentially adding several percentage points of extra energy depending on surface type - a key advantage for utility-scale PV farms and flat-roof installations, without increasing installed footprint. - **Tier-1 manufacturer per BloombergNEF** - Jetion Solar is listed on the BloombergNEF Tier-1 Module Maker Tiering (2Q 2026), easing project financing through banks and investment funds and confirming the reliability and financial stability of a manufacturer operating since 2004. - **Competitive efficiency up to 24.1%** - The series' peak efficiency of 24.1% matches the best-in-class benchmark in the segment (e.g., Hanersun Hitouch 6N at the same 650W power) and clearly outperforms BYD AURO N NLBK-39 (23.25%) and Astronergy ASTRO N5 (23.3%), meaning higher yield per m² at the same panel footprint. - **1500V DC rating and IP68 junction box** - Certified 1500V DC system voltage enables longer string configurations, reducing the number of BoS components (cabling, mounting structure), while the IP68-rated junction box improves moisture resistance in commercial and utility-scale installations. ## Cons - **Entry-level variants trail segment leader on efficiency** - The series' lower efficiency bound is 23%, below the 24.1% maximum offered by the competing Hanersun Hitouch 6N at the same 650W power - buyers must verify which specific JT SLt(B) variant they're getting to secure the claimed efficiency edge. ## About this series The Jetion JT SLt(B) 620-650W series consists of dual-glass modules built with N-type TOPCon monocrystalline half-cut cells, delivering more stable output and reduced energy losses under partial shading conditions. The **bifacial** design captures reflected light from the surrounding surface, boosting real-world energy yield without increasing the installation footprint. The dual-glass construction combined with **multi-busbar (MBB)** technology limits microcracking and improves heat dissipation, allowing the panels to maintain high performance even in demanding operating conditions. Certified for **1500V DC** systems, the series simplifies string design with fewer BoS components, lowering wiring and mounting structure costs. A robust aluminum frame and an **IP68-rated junction box** ensure durability in installations exposed to moisture and variable weather. The JT SLt(B) series fits residential, commercial, and utility-scale projects alike, where long-term reliability is a priority. Backed by a **12-year product warranty and 30-year linear performance warranty**, this series is an attractive choice for investors seeking a lower LCOE and predictable returns over several decades of operation. ## Notable figures - At 23.5% efficiency, this panel is 0.7pp above typical \*\*TOPCon 600-650W\*\* modules (median: 22.8%) - 235.1 W/m² power density - 7.4 W/m² more than \*\*TOPCon 600-650W\*\* median (227.7 W/m²), more power per roof area - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 600-650W\*\* panels - Bifacial design (85% factor) captures reflected light - adds 4-13% yield on ground-mount or white roof - #716 for efficiency, #2165 for temperature performance out of 14005 panels ## Questions ### How do Jetion JT SLt(B) panels differ from standard mono-facial panels? JT SLt(B) panels use bifacial technology, meaning they generate power from both sides of the module. The rear side captures light reflected from the ground, roof, or a light-colored surface, which can increase real-world energy yield by up to double digits over the same footprint, without any extra installation cost. ### What warranty comes with Jetion JT SLt(B) 620-650W modules? The manufacturer provides a 12-year product warranty covering material and workmanship defects, plus a 30-year linear power warranty. This means that even after 30 years of operation, the panel is guaranteed to retain a specified percentage of its original output, supporting a predictable long-term return on investment. ### What is N-TOPCon technology and is it worth choosing? N-TOPCon is an advanced N-type monocrystalline cell technology that reduces electron recombination losses at the cell surface, boosting conversion efficiency compared to older PERC cells. In practice, this means higher energy output from the same roof area and lower power degradation over time, making it especially cost-effective on limited roof space. ### Are Jetion JT SLt(B) panels resistant to microcracks and harsh operating conditions? Yes, the dual-glass construction combined with multi-busbar (MBB) technology significantly reduces the risk of cell microcracks and improves heat dissipation from the module. As a result, the panels maintain high efficiency even under wide temperature swings, humidity, or snow load, while the IP68-rated junction box adds extra protection against moisture. ### Do you need a special inverter for an installation with Jetion 650W panels? JT SLt(B) panels carry a certified 1500V DC rating, allowing longer strings to be designed with fewer BoS components such as cabling and combiner boxes. You simply need to select an inverter compatible with the voltage and current parameters of the specific power variant listed in that model's datasheet. ### What installations are Jetion JT SLt(B) 620-650W panels best suited for? This series works well for residential, commercial, and utility-scale solar farm projects where high module power and long-term reliability matter most. With power ratings up to 650 Wp, fewer panels are needed to reach a target system capacity, which lowers mounting structure and labor costs. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/b191d5cf578947148e0ca20184164db1-631bf5a5bfbe.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +1.7 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +45 W, lighter, +1.7 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +40 W, lighter, +1.5 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +1.5 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +35 W, lighter, +1.3 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +35 W, lighter, +1.3 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | Cooler, lighter, +1.3 pp | | [Jetion JT620SLt(B)](https://comparepv.com/panel/jetion-jt620slt-b) | 620 W | -15 W, -0.5 pp | | [Jetion JT625SLt(B)](https://comparepv.com/panel/jetion-jt625slt-b) | 625 W | -10 W, -0.4 pp | | [Jetion JT630SLt(B)](https://comparepv.com/panel/jetion-jt630slt-b) | 630 W | Very close match | | [Jetion JT640SLt(B)](https://comparepv.com/panel/jetion-jt640slt-b) | 640 W | Very close match | | [Jetion JT645SLt(B)](https://comparepv.com/panel/jetion-jt645slt-b) | 645 W | +10 W, +0.4 pp | | [Jetion JT650SLt(B)](https://comparepv.com/panel/jetion-jt650slt-b) | 650 W | +15 W, +0.6 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +65 W, cooler, +1.5 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +60 W, cooler, +1.4 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | +35 W, cooler, +1.3 pp | --- Source: https://comparepv.com/panel/jetion-jt635slt-b 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.