--- title: "Just Solar JST-EBMH-535W-D 535W Solar Panel - Specs & Review | ComparePV" description: "Just Solar JST-EBMH-535W-D 535W solar panel. Specs: 20.90% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/just-solar-jst-ebmh-535w-d" updated: 2026-09-11 --- # Just Solar JST-EBMH-535W-D Middle of its segment, weak in heat 432 panels in the segment TOPCon 500-550 W ## Identity - **Manufacturer:** Just Solar - **Model:** JST-EBMH-535W-D - **Series:** AGGERSSOR - **Rated power:** 535 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 500-550 W (432 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 535 W | 510 W | Strong - top 10% | | | Module efficiency | 20.90% | 22.73% | Weak - bottom 3% | 10,072 | | Power density | 207.0 | 227.4 | Weak - bottom 2% | 10,849 | | Temperature coefficient | -0.360 | -0.290 | Weak - bottom 1% | 12,345 | | Weight (kg) | 29.0 kg | 27.0 kg | Weak - bottom 21% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.90% | 22.73% | Weak - bottom 3% | 10,072 | | Power density | 207.0 | 227.4 | Weak - bottom 2% | 10,849 | | Temperature coefficient | -0.360 | -0.290 | Weak - bottom 1% | 12,345 | | Weight per kWp | 54.2 | 52.4 | Weak - bottom 21% | 8,430 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **-0.360 %/°C temperature coefficient** - Bottom 1% of the TOPCon 500-550 W segment, against a median of -0.290. Ranked 12,345th in the whole database. - **207.0 watts per square metre** - Bottom 2% of the TOPCon 500-550 W segment, against a median of 227.4. Ranked 10,849th in the whole database. - **20.90% module efficiency** - Bottom 3% of the TOPCon 500-550 W segment, against a median of 22.73%. Ranked 10,072nd in the whole database. - **Not ideal for:** Hot climates, roofs where every square metre has to count and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 535 W - **Efficiency:** 20.90 % - **Voltage at Pmax (Vmp):** 41.00 V - **Current at Pmax (Imp):** 13.05 A - **Open-circuit voltage (Voc):** 49.20 V - **Short-circuit current (Isc):** 13.81 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.360 %/degC - **Temperature coefficient of Voc:** -0.280 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 41 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 144 ### Physical - **Length:** 2279 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 29.0 kg - **Area:** 2.58 m2 - **Power density:** 207.0 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 80.0 % - **First-year degradation:** 3.00 % - **Annual degradation:** 0.59 % - **Output after 30 years:** 428 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 10072 of 14005 | | Power density | 10849 of 14005 | | Temperature coefficient | 12345 of 14005 | | Weight | 8430 of 14005 | | Warranty | 21 of 14005 | ## Pros - **N-type TOPCon cell technology** - N-type TOPCon cells exhibit significantly lower light-induced degradation (LID/LeTID) compared to legacy P-type PERC — typical annual degradation for N-type is \<0.4% vs. 0.5–0.6% for PERC, resulting in a measurably higher cumulative energy yield over the 30-year warranty period. - **Module efficiency up to 21.5% — above peer comparables** - Peak module efficiency of 21.5% slightly but measurably exceeds comparable series: Goldi Solar GS10-B144-TF (21.3%), IBC Solar 182M Half Cell (21.28%), and S-Energy SL65-72BGJ (21.3%). Higher power density means less roof area required for an equivalent Wp installation. - **30-year linear power warranty** - The manufacturer provides a 30-year linear power output warranty — longer than the 25-year standard commonly offered by many manufacturers in the 530–550 Wp segment. An extended warranty reduces investment risk and can lower the calculated LCOE of the installation. - **Half-cut + Multi-Busbar construction** - The combination of half-cut cells and Multi-Busbar (MBB) configuration shortens current path length and splits the module into two independent electrical sub-strings. In practice, this reduces partial-shading losses by up to 50% compared to full-cell designs — a key advantage for residential rooftops with chimneys, dormers, or antennas. - **Competitive temperature coefficient (Pmax)** - The temperature coefficient of Pmax at -0.36%/°C is competitive for N-type TOPCon (premium Tier-1 modules such as Jinko Tiger Neo achieve -0.29%–0.30%). In Polish climate conditions — where module temperatures frequently exceed 60°C in July — this outperforms typical PERC (-0.40%/°C) and delivers a measurable boost in summer energy production. ## Cons - **No BNEF Tier-1 status** - Just Solar does not appear on the BloombergNEF Tier-1 module manufacturer list (Q1 2026), meaning it lacks the confirmed bankability required for non-recourse financing of utility-scale projects (>1 MW). For residential and small commercial installations (\<500 kW), this is largely irrelevant, but it may disqualify the series from tenders requiring institutional project finance. - **15-year product warranty vs. 25 years from Tier-1** - The product (materials and workmanship) warranty is 15 years, while leading Tier-1 manufacturers in this power class — JA Solar, Jinko, LONGi — standardly offer 25-year product warranties on TOPCon modules. The shorter coverage window increases the risk of out-of-pocket service costs after year 15. - **Monofacial only — no bifacial option** - The AGGRESSOR series is available only in a monofacial configuration (is\_bifacial: false). On ground-mounted systems or white roofing membranes where ground albedo ranges from 15–25%, bifacial modules typically add 5–15% additional energy yield at no incremental BoS cost. The absence of a bifacial variant limits yield optimization in such applications. ## About this series The Just Solar AGGRESSOR series is an advanced photovoltaic solution that redefines performance standards through the use of **Half-Cut cell technology**. This design effectively minimizes energy losses resulting from partial shading and reduces the risk of hot spots, which directly translates to stable system operation for decades. The use of **Multi-Busbar cells** allows for a significant reduction in the current flow path, which increases module efficiency even in challenging lighting conditions, typical of the Polish climate. Panels from this line are characterized by exceptional resistance to potential-induced degradation, offering investors safety and predictability of returns. This is a choice aimed at those seeking uncompromising durability, as the **reinforced mechanical construction** protects the modules against extreme snow loads and strong winds. The AGGRESSOR series performs perfectly in both extensive solar farms and demanding residential installations, where maximizing the use of available roof space is key. Compared to standard solutions, this line offers a **more favorable temperature coefficient**, which guarantees higher electricity production on hot days. This is a solid investment for those who expect not only savings from photovoltaics but also **maximum optimization of energy yields** based on modern engineering. ## Notable figures - Module efficiency of 20.9% is 1.8pp below average for \*\*TOPCon 500-550W\*\* panels (median: 22.7%) - Power density of 207.0 W/m² is 20.4 W/m² below \*\*TOPCon 500-550W\*\* median (227.4 W/m²) - needs more roof space - At -0.36%/°C, loses 0.07pp more power per degree than \*\*TOPCon 500-550W\*\* median (-0.29%/°C) - At 29.0 kg (2.0 kg above \*\*TOPCon 500-550W\*\* median of 27.0 kg), requires checking roof load capacity - Ranked #10072 out of 14005 panels for efficiency in the database ## Questions ### What warranty does the Just Solar AGGRESSOR 550 Wp panel come with? The Just Solar AGGRESSOR series carries a 15-year product warranty covering material and manufacturing defects. In addition, the manufacturer provides a 30-year linear power warranty guaranteeing at least 80% of nominal output after that period. This is one of the longer warranty standards available at this power class, giving investors confidence in stable energy yields over three decades without additional costs. ### What is TOPCon technology and why is it used in the AGGRESSOR series? TOPCon (Tunnel Oxide Passivated Contact) is a next-generation cell technology in which a thin tunnel oxide layer on the rear cell surface minimizes charge carrier recombination. As a result, AGGRESSOR 550 Wp modules achieve a module efficiency of around 21.5%, outperforming typical PERC cells. The technology also delivers better performance under low-irradiance conditions — common in Polish and Central European climates for a significant part of the year. ### Are the Just Solar AGGRESSOR 550 Wp panels suitable for a pitched residential roof? Yes, the AGGRESSOR 550 Wp panels measure approximately 2279×1134 mm and weigh about 29 kg, which is within the standard range for modules in this power class. The reinforced aluminum frame meets the snow and wind load requirements applicable to pitched roofs in Poland. Due to the module dimensions, it is recommended to consult a certified installer in advance so that the right racking structure can be selected. ### How do the AGGRESSOR panels perform in high summer temperatures? The AGGRESSOR series features a favorable temperature coefficient of Pmax at approximately -0.36%/°C, lower than the -0.38 to -0.40%/°C typical of PERC cells. In practice, during hot Polish summers when cell temperature reaches 60-70°C, AGGRESSOR modules generate more energy than comparable PERC panels of the same nominal output. The manufacturer explicitly lists the improved temperature coefficient as one of the key advantages of this line. ### Are Just Solar AGGRESSOR panels resistant to partial shading, such as from a chimney or dormers? Yes. The half-cut cell design splits each cell into two independent halves, so shading on one section of the panel does not shut down the entire module. This is complemented by the multi-busbar layout, which multiplies current paths and further reduces resistive losses. The AGGRESSOR series also offers enhanced PID resistance, which matters in rooftop installations where the inverter may be ungrounded. ### How do Just Solar AGGRESSOR panels compare to standard PERC modules on the market? The core difference is cell technology: AGGRESSOR uses TOPCon instead of PERC, delivering higher module efficiency (around 21.5% vs. 20-21% for PERC), a lower temperature coefficient, and better PID resistance. Half-cut cells and multi-busbar construction further improve performance under partial shading. The purchase price is typically slightly higher than PERC, but the higher annual energy yield and the 30-year power warranty justify that gap over the system's lifetime. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/JST-EBMH-530-550-W-D-2279-2256-d4df4df222f1.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, lighter, +4.1 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +3.9 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, lighter, +3.9 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +3.8 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, lighter, +3.7 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, lighter, +3.6 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, lighter, +3.6 pp | | [Just Solar JST-EBMH-530W-D](https://comparepv.com/panel/just-solar-jst-ebmh-530w-d) | 530 W | Very close match | | [Just Solar JST-EBMH-540W-D](https://comparepv.com/panel/just-solar-jst-ebmh-540w-d) | 540 W | +0.2 pp | | [Just Solar JST-EBMH-545W-D](https://comparepv.com/panel/just-solar-jst-ebmh-545w-d) | 545 W | +10 W, +0.4 pp | | [Just Solar JST-EBMH-550W-D](https://comparepv.com/panel/just-solar-jst-ebmh-550w-d) | 550 W | +15 W, +0.6 pp | | [Just Solar JST-EBMH-555W-D](https://comparepv.com/panel/just-solar-jst-ebmh-555w-d) | 555 W | +20 W, +0.8 pp | | [Just Solar JST-EBMH-560W-D](https://comparepv.com/panel/just-solar-jst-ebmh-560w-d) | 560 W | +25 W, +1.0 pp | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +115 W, cooler, +4.3 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +110 W, cooler, +4.1 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +105 W, cooler, +3.9 pp | --- Source: https://comparepv.com/panel/just-solar-jst-ebmh-535w-d Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.