--- title: "JS Solar JS535M144BDG 535W Solar Panel - Specs & Review | ComparePV" description: "JS Solar JS535M144BDG 535W solar panel. Specs: 20.71% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/js-solar-js535m144bdg" updated: 2026-09-11 --- # JS Solar JS535M144BDG Strong in heat, heavy for its output 706 panels in the segment PERC 500-550 W ## Identity - **Manufacturer:** JS Solar - **Model:** JS535M144BDG - **Series:** JS-PERC BIFACIAL - **Rated power:** 535 W - **Cell technology:** PERC - **Bifacial:** yes ## How it compares Compared against segment PERC 500-550 W (706 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 535 W | 535 W | Typical | | | Module efficiency | 20.71% | 20.90% | Typical | 10,721 | | Power density | 207.1 | 209.0 | Typical | 10,764 | | Temperature coefficient | -0.335 | -0.350 | Strong - top 13% | 8,753 | | Weight (kg) | 32.0 kg | 28.4 kg | Weak - bottom 13% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.71% | 20.90% | Typical | 10,721 | | Power density | 207.1 | 209.0 | Typical | 10,764 | | Temperature coefficient | -0.335 | -0.350 | Strong - top 13% | 8,753 | | Weight per kWp | 59.8 | 53.0 | Weak - bottom 13% | 12,279 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **-0.335 %/°C temperature coefficient** - Top 13% of the PERC 500-550 W segment, against a median of -0.350. ### Watch out for - **59.8 kg per kWp** - Bottom 13% of the PERC 500-550 W segment, against a median of 53.0. - **Best for:** Commercial, utility-scale and shaded-installations. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 535 W - **Efficiency:** 20.71 % - **Voltage at Pmax (Vmp):** 41.00 V - **Current at Pmax (Imp):** 13.05 A - **Open-circuit voltage (Voc):** 49.44 V - **Short-circuit current (Isc):** 13.90 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.335 %/degC - **Temperature coefficient of Voc:** -0.269 %/degC - **Temperature coefficient of Isc:** 0.063 %/degC - **NOCT:** 42 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 144 - **Bifacial:** yes - **Bifacial gain:** 25.00 ### Physical - **Length:** 2278 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 32.0 kg - **Area:** 2.58 m2 - **Power density:** 207.1 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 85.0 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.45 % - **Output after 30 years:** 454 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 10721 of 14005 | | Power density | 10764 of 14005 | | Temperature coefficient | 8753 of 14005 | | Weight | 12279 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Efficiency on par with peer comparables** - Peak efficiency of 21.29% (550 Wp variant) is on par with Goldi Solar GS10-B144-TF (21.3%), S-Energy SL65-72BGJ (21.3%), and virtually identical to IBC Solar 182M (21.28%). The JS-PERC BIFACIAL series matches benchmark products in the segment on power density. - **Bifacial technology + half-cut cells** - The active rear surface delivers additional energy yield of 2–15% depending on ground albedo and tilt angle — reaching the upper range on high-albedo surfaces or single-axis trackers. Half-cut cell architecture reduces resistive losses and limits the impact of partial shading on the full string, which is critical for utility-scale farms with non-uniform surroundings. - **30-year linear power warranty** - The manufacturer provides a 30-year linear performance warranty — matching the industry standard of leading producers such as JA Solar and Trina Solar. For utility-scale projects with a 20–25-year CAPEX horizon, this is a key input for LCOE calculations and financial due diligence. - **Four power variants: 535–550 Wp** - Availability of four variants (535, 540, 545, 550 Wp) allows precise string sizing to inverter MPPT input ranges without over- or under-sizing, directly optimizing BoS costs and system performance ratio. ## Cons - **Not a BNEF Tier-1 bankable manufacturer** - JS Solar does not appear on the BloombergNEF bankable manufacturer list (Q1 2026). For non-recourse financed utility-scale projects, this is a real obstacle: lenders typically require Tier-1 status as a financing condition. Direct peer IBC Solar carries an established market reputation and certified bankability, which can be decisive during project due diligence. - **PERC lags TOPCon in bifaciality** - PERC cell bifaciality factor is typically 70–75%, while N-type TOPCon modules reach 80–85%. Field studies (Sohn et al. 2025, Energy Science & Engineering) show TOPCon generates 5–8% higher annual energy yield than PERC at comparable STC power ratings. On high-albedo sites (light gravel, snow), this gap directly reduces project IRR versus next-generation modules. - **15-year product warranty** - The product warranty covers 15 years, whereas leading Tier-1 manufacturers (Trina, JinkoSolar, LONGi) standardly offer 25-year product warranties on comparable bifacial modules in this power class. The shorter coverage period increases O&M risk beyond year 15, particularly given the manufacturer's less established global service footprint. ## About this series The JS-PERC BIFACIAL series redefines performance standards in demanding energy projects, combining proven PERC cell architecture with advanced bifacial technology. Thanks to the **active rear surface**, these panels effectively absorb light reflected from the ground, allowing for additional energy generation without the need to increase the installation area. This is a key response to the problem of limited mounting space, especially for installations on bright surfaces or tracking systems. The **half-cut cell technology** used significantly reduces internal losses and minimizes the negative impact of partial shading on the stability of the system. These models are characterized by a reinforced construction that ensures **high mechanical strength** against extreme snow and wind loads, guaranteeing safe operation for decades. JS-PERC BIFACIAL is primarily dedicated to solar farms and large commercial installations, where the priority is to maximize return on investment. They are distinguished from the competition by an exceptionally **high bifaciality factor** and an excellent price-to-yield ratio, making them some of the most cost-effective bifacial modules on the market, effectively lowering the levelized cost of energy (LCOE). ## Notable figures - At 20.7% efficiency, this panel is on par with typical \*\*PERC 500-550W\*\* modules - Power density of 207.1 W/m² matches the \*\*PERC 500-550W\*\* median - Temperature coefficient of -0.34%/°C matches the \*\*PERC 500-550W\*\* median - At 32.0 kg, this panel is 3.6 kg heavier than the \*\*PERC 500-550W\*\* median (28.4 kg) - more demanding for installation crews - 70% bifaciality enables rear-side power generation, boosting yield by 4-10% on reflective surfaces ## Questions ### How much additional energy can the JS Solar JS-PERC BIFACIAL series generate thanks to its active rear surface? The JS-PERC BIFACIAL modules harvest light reflected from the ground through the rear side of the PERC cells, increasing energy yield by roughly 5–15% compared to monofacial panels under favorable conditions. The biggest gains occur on high-albedo surfaces such as gravel, white roofing membranes, or concrete, as well as on tracking systems and agrivoltaic installations. The series' high bifaciality factor translates into a measurably lower LCOE for utility-scale projects. ### What is the warranty on JS Solar JS-PERC BIFACIAL panels? JS Solar provides a 15-year product warranty covering material defects and workmanship, plus a 30-year linear power output warranty for the JS-PERC BIFACIAL series. The power warranty guarantees that modules will retain a specified minimum performance level after 30 years of operation – a critical assurance for solar farms calculating return on investment over multiple decades. ### Does half-cut cell technology in the JS-PERC BIFACIAL actually improve performance under partial shading? Yes. Half-cut cells are laser-split in half, which reduces operating current and resistive losses inside the module. In practice, partial shading from a pole, chimney, or nearby structure has a smaller impact on the overall panel output than with standard full-cell modules. This is especially valuable in projects where uniform irradiance across the entire module surface cannot be guaranteed. ### What types of installations are the JS Solar JS-PERC BIFACIAL 550 W panels best suited for? The JS-PERC BIFACIAL series rated up to 550 Wp is primarily designed for utility-scale solar farms and large commercial installations. The high per-unit wattage reduces BoS (Balance of System) costs – fewer panels, less cabling, and fewer mounting points are required. For a typical residential rooftop installation the modules may be oversized and heavy; they excel in settings where maximizing ROI on a large footprint is the priority. ### How well do JS-PERC BIFACIAL panels withstand snow loads and wind pressure? The JS-PERC BIFACIAL series features a reinforced aluminum frame engineered for high mechanical loads typical of ground-mount installations in demanding climates. The manufacturer specifies resistance to extreme snow accumulation and high wind pressure, which is essential for long-lived solar farms. Exact allowable front and rear load ratings should be verified in the current product datasheet for the specific model. ### Is JS Solar a Tier 1 manufacturer, and does that affect project financing? JS Solar is not currently listed among Tier 1 manufacturers by Bloomberg NEF, which may matter for bank-financed or leased projects – some lenders require Tier 1 modules as a condition for project loans. For self-funded projects or smaller commercial installations this is less critical, and the JS-PERC BIFACIAL panels remain highly competitive in terms of price-to-yield ratio. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/JS-PERC-BIFACIAL-535-550W-6c4c71875894.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, lighter, +4.3 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +4.1 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, lighter, +4.1 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +4.0 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, lighter, +3.9 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, lighter, +3.8 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, lighter, +3.8 pp | | [JS Solar JS182MHC144-525](https://comparepv.com/panel/js-solar-js182mhc144-525) | 525 W | Lighter, -0.4 pp, -5 yr warranty | | [JS Solar JS182MHC144-530](https://comparepv.com/panel/js-solar-js182mhc144-530) | 530 W | Hotter, lighter, -5 yr warranty | | [JS Solar JS182MHC144-535](https://comparepv.com/panel/js-solar-js182mhc144-535) | 535 W | Hotter, lighter, -5 yr warranty | | [JS Solar JS182MHC144-540](https://comparepv.com/panel/js-solar-js182mhc144-540) | 540 W | Hotter, lighter, -5 yr warranty | | [JS Solar JS540M144](https://comparepv.com/panel/js-solar-js540m144) | 540 W | Lighter, -5 yr warranty | | [JS Solar JS182MHC144-545](https://comparepv.com/panel/js-solar-js182mhc144-545) | 545 W | Lighter, +0.4 pp, -5 yr warranty | | [JS Solar JS545M144](https://comparepv.com/panel/js-solar-js545m144) | 545 W | Lighter, +0.4 pp, -5 yr warranty | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +115 W, cooler, +4.5 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +110 W, cooler, +4.3 pp | --- Source: https://comparepv.com/panel/js-solar-js535m144bdg Not in this file, on the page: a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.