--- title: "Jetion JT520SLt(B) Solar Panel: Specs & Datasheet | ComparePV" description: "Jetion JT520SLt(B) solar panel. Specs: 21.90% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/jetion-jt520slt-b" image: "https://comparepv.com/og/panel/jetion-jt520slt-b.png" updated: 2026-09-11 --- # Jetion JT520SLt(B) Middle of its segment, heavy for its output 435 panels in the segment TOPCon 500-550 W ## Identity - **Manufacturer:** Jetion - **Model:** JT520SLt(B) - **Series:** JT SLt(B) - **Rated power:** 520 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 500-550 W (435 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 520 W | 510 W | Typical | | | Module efficiency | 21.90% | 22.74% | Weak - bottom 12% | 6,847 | | Power density | 219.0 | 227.4 | Weak - bottom 13% | 6,834 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,220 | | Weight (kg) | 31.1 kg | 27.0 kg | Weak - bottom 4% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.90% | 22.74% | Weak - bottom 12% | 6,847 | | Power density | 219.0 | 227.4 | Weak - bottom 13% | 6,834 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,220 | | Weight per kWp | 59.8 | 52.4 | Weak - bottom 4% | 12,367 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **59.8 kg per kWp** - Bottom 4% of the TOPCon 500-550 W segment, against a median of 52.4. Ranked 12,367th in the whole database. - **21.90% module efficiency** - Bottom 12% of the TOPCon 500-550 W segment, against a median of 22.74%. - **219.0 watts per square metre** - Bottom 13% of the TOPCon 500-550 W segment, against a median of 227.4. - **Best for:** Commercial, utility-scale and shaded-installations. - **Not ideal for:** Weight-limited structures, tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 520 W - **Efficiency:** 21.90 % - **Voltage at Pmax (Vmp):** 38.50 V - **Current at Pmax (Imp):** 13.51 A - **Open-circuit voltage (Voc):** 46.40 V - **Short-circuit current (Isc):** 14.34 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:** 2094 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 31.1 kg - **Area:** 2.37 m2 - **Power density:** 219.0 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:** 454 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 6847 of 14129 | | Power density | 6834 of 14129 | | Temperature coefficient | 2220 of 14129 | | Weight | 12367 of 14129 | | Warranty | 21 of 14129 | ## Pros - **N-type TOPCon cells with half-cut and MBB** - N-type TOPCon cells in a half-cut layout with a multi-busbar (MBB) grid reduce resistive losses and hot-spot risk, delivering module efficiency of up to 22.1% and lower LID degradation than older P-type PERC technology. - **Bifacial dual-glass construction** - The dual-glass bifacial design captures albedo reflected from the ground, generating additional energy from the rear side - particularly cost-effective on bright gravel roofs and ground-mount installations, where real-world yield gains can reach several to low double-digit percentage points versus monofacial panels. - **1500V DC system compatibility** - Panels rated for 1500V DC system voltage enable longer module strings, reducing the number of inverters, cabling and mounting structures, which lowers BoS costs in larger commercial and industrial installations. - **30-year linear power warranty** - The manufacturer offers a 30-year linear power warranty, matching standards set by leading tier-1 manufacturers such as Jinko Solar (Tiger Neo) and VSUN, confirming the long-term durability of the TOPCon technology used. - **BNEF Tier 1 certified manufacturer** - Jetion Solar (founded in 2004) is listed on the BloombergNEF Tier 1 Module Maker Tiering System, confirming project bankability and easing non-recourse financing from commercial banks. ## Cons - **Efficiency below the 525W segment leaders** - The series' maximum efficiency is 22.1%, while comparable 525W competitors reach notably higher figures - Jolywood JW-HD108N-R2 Black Series at 23.6% and Jinko Tiger Neo 54HL4M-BDV at 23.61%. This means the Jetion panel occupies more roof area for the same power output. - **Shorter product warranty than market leaders** - The 12-year product warranty is shorter than the 25-year standard now offered by leading tier-1 manufacturers (e.g., Jinko Solar, LONGi), which may be a meaningful factor when comparing total cost of risk (TCO) in long-horizon projects. - **Discontinuous BNEF Tier 1 track record** - Jetion Solar re-entered the BloombergNEF Tier 1 list only in Q2 2024 after a prior gap in classification, indicating a less continuous bankability track record compared to manufacturers like Jinko Solar, which have held Tier 1 status uninterrupted for many years. ## About this series The JT SLt(B) series comprises dual-glass, bifacial photovoltaic modules from Jetion built around **N-type TOPCon cells**, combining high conversion efficiency with a low long-term degradation rate. The use of **half-cut** cell technology together with a multi-busbar (MBB) design reduces resistive losses and lowers the risk of hot spots, resulting in more stable module performance even under partial shading. The **bifacial** dual-glass construction lets the panel capture reflected radiation from the ground, generating extra energy from its rear side - a particularly cost-effective solution on light-colored surfaces, gravel roofs, or ground-mounted installations. The glass-glass build increases mechanical durability and extends the panel's service life, helping lower servicing costs over the system's lifetime and improving overall LCOE. The JT SLt(B) series is rated for **1500V DC** systems, simplifying string design and reducing BoS costs in larger installations. Thanks to these features, the modules suit commercial and utility-scale projects as well as extensive residential installations where maximizing energy yield from limited roof space matters. The manufacturer backs the modules with a long-term product warranty and a linear power performance warranty, reflecting the durability of the technology used. ## Notable figures - Efficiency of 21.9% is 0.8pp below the \*\*TOPCon 500-550W\*\* median (22.7%) - At 219.0 W/m², this panel generates 8.4 W/m² less per unit area than \*\*TOPCon 500-550W\*\* median (227.4 W/m²) - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 500-550W\*\* panels - Weight of 31.1 kg is 4.1 kg above \*\*TOPCon 500-550W\*\* median (27.0 kg) - verify structural support - Bifaciality factor of 85% can add 4-13% extra yield with reflective mounting surface ## Questions ### How does the N-type TOPCon technology used in JT SLt(B) differ from classic PERC panels? N-type TOPCon cells offer higher conversion efficiency and a significantly lower annual degradation rate than traditional P-type PERC cells. Thanks to an additional passivation layer, they reduce recombination losses, resulting in higher first-year energy yield and more stable power output over the following years, particularly noticeable after 10-15 years of system operation. ### Does the bifacial design of JT SLt(B) panels actually increase energy production? Yes, the bifacial construction with double glass allows the module to capture radiation reflected off the ground on its rear side. The additional energy gain depends on the albedo of the surface beneath the installation - on light gravel, white roofing membrane, or snow it can add anywhere from a few to over a dozen percent more energy compared to a monofacial panel of the same nominal power. ### What is the maximum power rating of the JT SLt(B) series and what installations is it suited for? The most powerful variants in the series reach up to 525 Wp. High power combined with compact dimensions makes them suitable for large commercial and industrial installations, where maximizing power per hectare matters, as well as for extensive residential installations on large roofs, where fewer modules delivering high yield is preferred. ### What warranty covers Jetion JT SLt(B) panels? The manufacturer provides a 12-year product warranty covering material and workmanship defects, along with a 30-year linear power warranty guaranteeing a minimum percentage of retained nominal power over subsequent years. These are extended terms compared to standard PERC panels, reflecting the higher durability of TOPCon technology and glass-glass construction. ### Are JT SLt(B) panels compatible with 1500V DC systems? Yes, the JT SLt(B) series is designed for operation in 1500V DC systems, enabling longer module strings with fewer inverters and less cabling. In practice this means lower BoS (Balance of System) costs in larger ground-mount and industrial installations compared to older 1000V systems. ### Does the glass-glass construction of bifacial modules require special mounting compared to standard panels? Glass-glass panels are somewhat heavier than standard modules with a rear backsheet, so it's worth checking the load capacity of the mounting structure before installation. They also require clearance beneath the module or a light-colored ground surface to benefit from the bifacial effect. Otherwise, installation proceeds similarly to typical panels, while the extra glass layer improves mechanical resistance and extends the system's lifespan. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/4ede85a411d74671925e21b170190ada-92d6e29216e9.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, lighter, +3.1 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +2.9 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +40 W, lighter, +2.9 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +2.8 pp | | [WINAICO WST-505BKX54-A2](https://comparepv.com/panel/winaico-wst-505bkx54-a2) | 505 W | Cooler, lighter, +2.8 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +35 W, lighter, +2.7 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | -30 W, lighter, +2.6 pp | | [Jetion JT505SLt(B)](https://comparepv.com/panel/jetion-jt505slt-b) | 505 W | -15 W, -0.6 pp | | [Jetion JT510SLt(B)](https://comparepv.com/panel/jetion-jt510slt-b) | 510 W | -10 W, -0.4 pp | | [Jetion JT515SLt(B)](https://comparepv.com/panel/jetion-jt515slt-b) | 515 W | Very close match | | [Jetion JT525SLt(B)](https://comparepv.com/panel/jetion-jt525slt-b) | 525 W | +0.2 pp | | [Gamko New Energy GKA120N-PRO-590W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-590w) | 590 W | +70 W, lighter, +1.9 pp | | [Gamko New Energy GKA120N-PRO-585W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-585w) | 585 W | +65 W, lighter, +1.7 pp | | [Bisol BGO 580](https://comparepv.com/panel/bisol-bgo-580) | 580 W | +60 W, lighter, +1.6 pp | | [Gamko New Energy GKA120N-PRO-580W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-580w) | 580 W | +60 W, lighter, +1.5 pp | --- Source: https://comparepv.com/panel/jetion-jt520slt-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.