--- title: "Just Solar JST-EBMH-555W-D 555W Solar Panel - Specs & Review | ComparePV" description: "Just Solar JST-EBMH-555W-D 555W solar panel. Specs: 21.70% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/just-solar-jst-ebmh-555w-d" updated: 2026-09-11 --- # Just Solar JST-EBMH-555W-D Middle of its segment, weak in heat 1,018 panels in the segment TOPCon 550-600 W ## Identity - **Manufacturer:** Just Solar - **Model:** JST-EBMH-555W-D - **Series:** Halfcut 182mm MONO MODULE - **Rated power:** 555 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 550-600 W (1018 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 555 W | 580 W | Weak - bottom 5% | | | Module efficiency | 21.70% | 22.44% | Weak - bottom 13% | 7,421 | | Power density | 214.8 | 224.4 | Weak - bottom 6% | 8,148 | | Temperature coefficient | -0.360 | -0.290 | Weak - bottom 1% | 12,345 | | Weight (kg) | 29.0 kg | 31.2 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.70% | 22.44% | Weak - bottom 13% | 7,421 | | Power density | 214.8 | 224.4 | Weak - bottom 6% | 8,148 | | Temperature coefficient | -0.360 | -0.290 | Weak - bottom 1% | 12,345 | | Weight per kWp | 52.3 | 53.8 | Typical | 5,708 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **-0.360 %/°C temperature coefficient** - Bottom 1% of the TOPCon 550-600 W segment, against a median of -0.290. Ranked 12,345th in the whole database. - **214.8 watts per square metre** - Bottom 6% of the TOPCon 550-600 W segment, against a median of 224.4. Ranked 8,148th in the whole database. - **21.70% module efficiency** - Bottom 13% of the TOPCon 550-600 W segment, against a median of 22.44%. - **Best for:** Residential, commercial, shaded-installations, cold-climate and hot-climate. - **Not ideal for:** Hot climates, roofs where every square metre has to count and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 555 W - **Efficiency:** 21.70 % - **Voltage at Pmax (Vmp):** 41.80 V - **Current at Pmax (Imp):** 13.28 A - **Open-circuit voltage (Voc):** 50.00 V - **Short-circuit current (Isc):** 14.05 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:** 214.8 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:** 443 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7421 of 14005 | | Power density | 8148 of 14005 | | Temperature coefficient | 12345 of 14005 | | Weight | 5708 of 14005 | | Warranty | 21 of 14005 | ## Pros - **N-type TOPCon cell technology** - N-type cells eliminate Light Induced Degradation (LID), which causes a 1–2% first-year power loss in P-type PERC modules. TOPCon's typical temperature coefficient of –0.30%/°C vs. –0.35%/°C for PERC translates to measurably higher energy yield on hot days. Among direct peer comparables, only Just Solar ships N-type — the Premier Energies 560 Wp remains PERC. - **30-year linear power warranty** - The manufacturer provides a 30-year linear power warranty — 5 years beyond the 25-year standard common at this price point. For residential and C&I installations with a 25–30-year lifecycle, this ensures full warranty coverage throughout the system's operational life. - **Module efficiency 21.7–21.9% — top of peer group** - The series achieves 21.7–21.9% efficiency, matching or exceeding all direct peer comparables in the 182mm class (Exiom EX560 and Fellow Energy FE72-18X at 21.7%; Premier Energies PERC at 21.67%). The 21.9% figure for the 560 Wp variant is competitive with Tier 1 TOPCon offerings in the M10 cell format. - **Half-cut cells + MBB architecture** - Splitting cells in half reduces operating current by 50%, cutting I²R resistive losses and improving partial shading tolerance from chimneys and dormers. The multi-busbar (MBB) layout shortens current paths, lowers microcrack risk in the silicon, and improves charge collection under diffuse irradiance conditions. - **M10 (182 mm) cell format — power-density optimum** - M10 cells deliver higher per-module power output than the older M6 format (166 mm) while remaining fully compatible with standard racking systems and inverters with MPPT inputs designed for this module class. The 555–560 Wp output in a standard footprint simplifies system design and BoS cost estimation. ## Cons - **Not BNEF Tier 1 bankable** - Just Solar does not appear on the BloombergNEF bankable Tier 1 module manufacturer list (Q1 2026), directly limiting project bankability for non-recourse-financed commercial and utility-scale installations. For bank-financed C&I projects where Tier 1 status is a hard prerequisite, panels from Jinko, LONGi, or Trina face no such restriction. - **15-year product warranty vs. 25 years from market leaders** - The product (workmanship) warranty is 15 years, while leading Tier 1 TOPCon manufacturers in the same power class — JA Solar, LONGi, Canadian Solar — provide 25-year product warranties. The shorter coverage increases investor risk for latent manufacturing defects arising after year 15. - **Monofacial module — no bifacial energy gain** - The series is not bifacial (is\_bifacial: false), while the direct peer comparable Premier Energies offers a BIFACIAL DUAL GLASS variant at the same 560 Wp power class. Bifacial TOPCon panels typically generate 10–20% additional energy from the rear surface depending on ground albedo, making the monofacial design sub-optimal for ground-mount systems or rooftops with light-colored surfaces. ## About this series Just Solar Halfcut 182mm MONO MODULE is a series of panels that focuses on maximizing yields from limited roof space through the use of **M10-type cells with a 182 mm side**. The use of half-cut technology allows for a significant reduction in energy losses resulting from internal resistance and provides **higher resistance to partial shading**, which is crucial for complex roof surfaces with dormers or chimneys. This series effectively solves the problem of performance drops at high temperatures by offering an optimized temperature coefficient, which translates into more stable operation of the entire installation on hot days. Thanks to the use of an **advanced multi-busbar (MBB) structure**, these modules collect electrical charge much more efficiently, while simultaneously minimizing the risk of harmful micro-cracks in the silicon structure. It is a solution dedicated to demanding investors looking for a middle ground between innovative technology and long-term reliability. Compared to older standards, the 182 mm series from Just Solar offers **increased mechanical frame rigidity** and better resistance to snow and wind loads. This makes these panels an ideal choice for the Polish climate, guaranteeing **high energy conversion efficiency** in both residential installations and large commercial systems. Choosing this series is an investment in energy security based on proven monocrystalline cell architecture. ## Notable figures - Module efficiency of 21.7% is 0.7pp below average for \*\*TOPCon 550-600W\*\* panels (median: 22.4%) - At 214.8 W/m², this panel generates 9.7 W/m² less per unit area than \*\*TOPCon 550-600W\*\* median (224.4 W/m²) - -0.36%/°C temperature coefficient - 0.07pp worse than \*\*TOPCon 550-600W\*\* median (-0.29%/°C), expect higher hot weather losses - Weight of 29.0 kg (2.2 kg below \*\*TOPCon 550-600W\*\* median of 31.2 kg) allows easier transport and roof mounting - In the top 53% for efficiency among all TOPCon panels ## Questions ### Are the Just Solar Halfcut 182mm MONO MODULE panels suitable for roofs with chimneys and dormers? Yes, the Just Solar Halfcut 182mm MONO MODULE series is particularly recommended for installations on roofs with obstacles. The half-cut technology splits each cell in two, significantly reducing losses from partial shading — a shaded section does not block the remaining cells from producing power. The reinforced frame with enhanced mechanical rigidity also makes installation on complex roof surfaces more straightforward. ### What warranty comes with the Just Solar Halfcut 182mm MONO MODULE series? Just Solar provides a 15-year product warranty covering manufacturing defects and mechanical damage, along with a 30-year linear power output warranty. After three decades of operation, the panels are guaranteed to retain at least the minimum power level specified by the manufacturer. This makes the series a sound long-term investment for homeowners and commercial operators alike. ### What is TOPCon technology and why was it chosen for the Just Solar 182mm series instead of standard PERC? TOPCon (Tunnel Oxide Passivated Contact) is a more advanced monocrystalline cell architecture than PERC. A thin tunnel oxide layer on the rear side of the cell minimizes electron recombination losses, resulting in higher conversion efficiency from the same surface area. In the Just Solar Halfcut 182mm series, TOPCon combined with M10 182mm cells delivers a peak power of up to 560 Wp in a compact module format. ### Does the Just Solar 560 Wp panel lose significant output on hot days? The Just Solar Halfcut 182mm MONO MODULE series features an optimized temperature coefficient that limits the power drop typically seen in PV modules during hot weather. The half-cut cell design also reduces internal resistance, lowering the module's operating temperature and stabilizing output on sunny summer days. This is a key advantage in Poland's climate, where heat waves are increasingly affecting energy yields. ### How does the multi-busbar (MBB) design in the Just Solar 182mm series differ from traditional busbars? Conventional panels use a few wide busbars, whereas multi-busbar (MBB) technology replaces them with many thin conductive wires. This improves charge collection across the cell surface, shortens the current path, and significantly reduces the risk of microcracks forming in the silicon under thermal stress. The result is both higher conversion efficiency and greater long-term module durability. ### Is the Just Solar Halfcut 182mm MONO MODULE series suitable for large commercial installations, or only for residential use? The series is designed for both residential prosumer installations and large-scale commercial or industrial projects. With up to 560 Wp per module and high conversion efficiency, a high peak power can be achieved in a limited footprint, reducing overall BoS costs per kilowatt installed. The reinforced mechanical frame also provides the snow and wind load resistance required by Poland's climate standards. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/JST-EBMH-540-560-W-D-2279-2256-1-a89b365ae00e.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, lighter, +3.3 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, lighter, +3.1 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +3.0 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, lighter, +2.9 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | Cooler, lighter, +2.7 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | Cooler, lighter, +2.7 pp | | [Just Solar JST-EBMH-530W-D](https://comparepv.com/panel/just-solar-jst-ebmh-530w-d) | 530 W | -25 W, -1.0 pp | | [Just Solar JST-EBMH-535W-D](https://comparepv.com/panel/just-solar-jst-ebmh-535w-d) | 535 W | -20 W, -0.8 pp | | [Just Solar JST-EBMH-540W-D](https://comparepv.com/panel/just-solar-jst-ebmh-540w-d) | 540 W | -15 W, -0.6 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 | Very close match | | [Just Solar JST-EBMH-560W-D](https://comparepv.com/panel/just-solar-jst-ebmh-560w-d) | 560 W | Very close match | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +95 W, cooler, +3.5 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +90 W, cooler, +3.3 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +85 W, cooler, +3.1 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +80 W, cooler, +2.9 pp | --- Source: https://comparepv.com/panel/just-solar-jst-ebmh-555w-d Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.