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Just Solar JST-EBMH-530W-D
Just Solar Brand review

JST-EBMH-530W-D

530 Wp TOPCon
ComparePV verdict

Middle of its segment, needs the roof space

Rank 7,813 of 14,005
Compare panels Datasheet PDF
Power (Wp)
530
Strong · top 15%
Efficiency (%)
20.70
Weak · bottom 2%
Density (Wp/m²)
205.1
Weak · bottom 1%
Temp (%/°C)
-0.360
Weak · bottom 1%
Weight (kg)
29.0
Weak · 2.0 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

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.

Ranking

432 panels in the segment TOPCon 500-550 W
Metric This panel Median Position in segment Overall rank
Module efficiency 20.70% 22.73% Weak · bottom 2% 10,764
Power density 205.1 227.4 Weak · bottom 1% 11,321
Temperature coefficient -0.360 -0.290 Weak · bottom 1% 12,345
Weight per kWp 54.7 52.4 Weak · bottom 15% 9,116
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

5 positive · 6 caution
Not ideal for

Roofs where every square metre has to count, hot climates and tight roof space.

Watch-outs
205.1 watts per square metre

Bottom 1% of the TOPCon 500-550 W segment, against a median of 227.4. Ranked 11,321st in the whole database.

-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.

20.70% module efficiency

Bottom 2% of the TOPCon 500-550 W segment, against a median of 22.73%. Ranked 10,764th in the whole database.

What owners get
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.

Trade-offs
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.

Notes from the database
  • At 20.7% efficiency, this panel is 2.0pp below the TOPCon 500-550W median of 22.7%
  • Power density of 205.1 W/m² is 22.3 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, this panel is 2.0 kg heavier than the TOPCon 500-550W median (27.0 kg) - more demanding for installation crews
  • In the top 77% for efficiency among all TOPCon panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 530 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.70 % Weak Segment median 22.73%
Vmpp · Impp 40.80 V · 13.00 A Operating point at max power
Voc · Isc 49.00 V · 13.76 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2279×1134×35 mm · 2.58 m² of roof
Weight 29.0 kg Weak Weak · 2.0 kg above median
Cells 144 · TOPCon Monocrystalline
Coefficient Pmax -0.360 %/°C Weak bottom 1% of its segment
Coefficient Voc · Isc -0.280 · 0.050 %/°C
NOCT 41 °C At 800 W/m², 20 °C ambient
Product warranty 15 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 80.0 % Equals 424 W guaranteed
Degradation 3.00 → 0.59 % First year, then annual

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.360 %/°C against a segment median of -0.290
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Just Solar JST-EBMH-530W-D 530 W 20.70% -0.360 29.0 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, lighter, +4.3 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg Cooler, lighter, +4.1 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg Cooler, lighter, +4.1 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg Cooler, lighter, +4.0 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg Cooler, lighter, +3.9 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, lighter, +3.8 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg Cooler, lighter, +3.8 pp
JST-EBMH-535W-D 535 W 20.90% -0.360 29.0 kg Very close match
JST-EBMH-540W-D 540 W 21.10% -0.360 29.0 kg +10 W, +0.4 pp
JST-EBMH-545W-D 545 W 21.30% -0.360 29.0 kg +15 W, +0.6 pp
JST-EBMH-550W-D 550 W 21.50% -0.360 29.0 kg +20 W, +0.8 pp
JST-EBMH-555W-D 555 W 21.70% -0.360 29.0 kg +25 W, +1.0 pp
JST-EBMH-560W-D 560 W 21.90% -0.360 29.0 kg +30 W, +1.2 pp
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +120 W, cooler, +4.5 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg +115 W, cooler, +4.3 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg +110 W, cooler, +4.1 pp

Found 2326 panels of the same or similar size to this one, within ±10 mm. See them here Found 2368 panels of the same or similar size to this one, within ±25 mm. See them here Found 2382 panels of the same or similar size to this one, within ±50 mm. See them here Found 2542 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
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.
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