--- title: "Just Solar JST-EDMH-455W-TD 455W Solar Panel - Specs & Review | ComparePV" description: "Just Solar JST-EDMH-455W-TD 455W solar panel. Specs: 23.30% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/just-solar-jst-edmh-455w-td" updated: 2026-09-11 --- # Just Solar JST-EDMH-455W-TD Space saver, weak in heat 1,089 panels in the segment TOPCon 450-500 W ## Identity - **Manufacturer:** Just Solar - **Model:** JST-EDMH-455W-TD - **Series:** JST-EDMH-(445-465)W-TD - **Rated power:** 455 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 450-500 W (1089 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 455 W | 465 W | Typical | | | Module efficiency | 23.30% | 22.52% | Strong - top 9% | 1,017 | | Power density | 233.0 | 225.2 | Strong - top 7% | 1,098 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 20% | 6,093 | | Weight (kg) | 20.5 kg | 24.0 kg | Strong - top 8% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.30% | 22.52% | Strong - top 9% | 1,017 | | Power density | 233.0 | 225.2 | Strong - top 7% | 1,098 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 20% | 6,093 | | Weight per kWp | 45.1 | 52.2 | Strong - top 8% | 607 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **233.0 watts per square metre** - Top 7% of the TOPCon 450-500 W segment, against a median of 225.2. Ranked 1,098th in the whole database. - **45.1 kg per kWp** - Top 8% of the TOPCon 450-500 W segment, against a median of 52.2. Ranked 607th in the whole database. - **23.30% module efficiency** - Top 9% of the TOPCon 450-500 W segment, against a median of 22.52%. Ranked 1,017th in the whole database. ### Watch out for - **-0.300 %/°C temperature coefficient** - Bottom 20% of the TOPCon 450-500 W segment, against a median of -0.290. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 455 W - **Efficiency:** 23.30 % - **Voltage at Pmax (Vmp):** 33.10 V - **Current at Pmax (Imp):** 13.75 A - **Open-circuit voltage (Voc):** 38.70 V - **Short-circuit current (Isc):** 14.26 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.300 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 44 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 108 ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 20.5 kg - **Area:** 1.95 m2 - **Power density:** 233.0 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 84.5 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.50 % - **Output after 30 years:** 384 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 1017 of 14005 | | Power density | 1098 of 14005 | | Temperature coefficient | 6093 of 14005 | | Weight | 607 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Premium efficiency in segment** - The series delivers 22.79–23.81% module efficiency, well above direct peer comparables: Jinko/JS Solar JS182MHC120 (21.48%) and Vikram SOMERA (20.91%). The gap of up to 2.9 percentage points translates into meaningfully less roof area required to achieve the same annual energy yield. - **N-type TOPCon – low LID and degradation** - N-type TOPCon cells exhibit first-year LID of ~0.26% vs. ~1.92% for PERC modules (Tongwei/PVEL 2024 data). Annual degradation runs ~0.40% vs. ~0.45% for PERC, compounding over a 30-year lifetime into a several-percent cumulative yield advantage for this series. - **30-year linear power warranty** - The manufacturer offers a 30-year power output warranty — longer than the 25-year standard provided by Jinko Solar and JA Solar in a comparable price tier. The 12–15-year product warranty aligns with market norms for this manufacturer category. - **16BB (SMBB) busbars + half-cut design** - The 16-busbar (SMBB) layout shortens current paths and reduces series resistance, boosting the module fill factor. Halving each cell reduces working current by 50%, cutting resistive losses and limiting the impact of partial shading from chimneys, antennas, or dormers on overall string output. - **PID resistance** - The manufacturer's declared PID resistance is relevant for high-voltage DC systems (1000–1500 V DC) common with string inverters in commercial projects, where PID can cause permanent power losses of 10–30% in susceptible modules over time. ## Cons - **Not BNEF Tier-1 / not bankable** - Just Solar does not appear on BloombergNEF's bankable manufacturer lists (as of Q1 2026). In practice, this restricts access to project finance for installations above ~100 kWp, where financial institutions and insurers routinely require modules from BNEF Tier-1 rated manufacturers as a condition of non-recourse lending. - **Monofacial — no bifacial yield gain** - The series is not bifacial (is\_bifacial: false), excluding additional energy harvest from reflected rear-side irradiance (typically +5–15% for bifacial modules at albedo 0.25–0.40 on ground-mount systems). Competing TOPCon products in the 445–465 Wp class already offer bifacial variants at comparable price points. - **No independent PVEL test data for this series** - Just Solar does not appear in the Kiwa PVEL PV Module Reliability Scorecard 2025. Given PVEL's published UVID data for TOPCon BOMs — ranging from 0.6% to 16.6% UV-induced degradation, with a 3.1% median — the absence of third-party test results for this specific series represents additional uncertainty for long-horizon investment projects. ## About this series The Just Solar JST-EDMH-(445-465)W-TD series consists of monocrystalline modules designed to maximize energy production from limited roof or ground-mounted areas. The use of **N-type TOPCon cells** helps minimize losses over time and maintain high efficiency even after years of operation, which significantly improves the cost-effectiveness of the installation. The **half-cell** design provides stability under partial shading and reduces the risk of power drops in typical roof conditions (chimneys, skylights, antennas). Another key feature is **16BB (SMBB) technology**, which improves current collection and enhances performance in practice, especially under uneven sunlight. The manufacturer emphasizes **PID resistance**, which makes it easier to maintain parameters in high-voltage systems. This is a good choice for installers and investors looking for panels for homes, small businesses, and commercial projects where predictable output, durability, and stable operation in challenging environments are important. ## Notable figures - 23.3% module efficiency - 0.8pp better than the \*\*TOPCon 450-500W\*\* median of 22.5% - 233.0 W/m² power density - 7.8 W/m² more than \*\*TOPCon 450-500W\*\* median (225.2 W/m²), more power per roof area - At -0.30%/°C, hot weather performance is typical for \*\*TOPCon 450-500W\*\* panels - 20.5 kg weight - 3.5 kg lighter than \*\*TOPCon 450-500W\*\* median (24.0 kg), reducing installation effort - #1017 for efficiency, #6093 for temperature performance out of 14005 panels ## Questions ### What warranty comes with the Just Solar JST-EDMH-(445-465)W-TD panels? The JST-EDMH-(445-465)W-TD series carries a 15-year product warranty covering material and workmanship defects, plus a 30-year linear power output warranty. This means the manufacturer guarantees a defined performance level for three decades. The extended power warranty is typical for N-type TOPCon modules and reflects the lower annual degradation rate of this cell technology compared to conventional PERC. ### What is N-type TOPCon technology and does it make a real difference in energy yield? TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell architecture that uses a thin tunnel oxide layer to reduce carrier recombination at the rear contact. In practice this means higher module efficiency, a lower temperature coefficient (less power loss on hot days), and slower annual degradation than PERC cells. For a residential system, the result is measurably more kilowatt-hours per year and better return on investment over a 25-30 year lifespan. ### Are the JST-EDMH-(445-465)W-TD panels suitable for a roof with chimneys or dormers that cause partial shading? Yes. The half-cut cell design splits each cell in two, so shading one section of the panel does not shut down the entire string current. The series also uses 16BB (SMBB) technology, which multiplies current-collection pathways and further reduces losses under uneven irradiance. This makes the JST-EDMH a solid choice for typical pitched roofs with chimneys, satellite dishes, or dormer windows. ### What is the maximum power output of the Just Solar JST-EDMH-(445-465)W-TD, and can different wattage variants be mixed in one system? The top variant in the series reaches 465 Wp, with the range spanning 445 to 465 W. Mixing panels of different wattages in the same string is generally discouraged because the inverter's MPPT will optimize for the weakest module, clipping overall output. For a homogeneous installation, order panels of the same power class. A licensed installer or system designer should confirm string configuration before commissioning. ### Are the Just Solar JST-EDMH-(445-465)W-TD panels bifacial? No, the JST-EDMH-(445-465)W-TD series is monofacial. It collects energy only from the front side and does not benefit from light reflected off the ground surface. For standard rooftop installations on residential buildings this is perfectly adequate, and the absence of a rear glass layer typically means lower weight and simpler mounting. ### Is Just Solar a Tier 1 manufacturer, and what does that mean for investment security? Just Solar does not currently appear on Tier 1 lists published by Bloomberg NEF or PV ModuleTech, which primarily assess manufacturer bankability rather than panel quality itself. When purchasing from a non-Tier 1 brand, it is advisable to verify IEC 61215 and IEC 61730 certifications, review the warranty scope offered by the local distributor or importer, and confirm the seller's track record, since the distributor often serves as the first point of contact for warranty claims. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/445-465-fa23a5f9fbf0.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +40 W, cooler, +1.5 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +50 W, cooler, +1.4 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +35 W, cooler, +1.2 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +45 W, cooler, +1.2 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +45 W, cooler, +1.2 pp | | [Gokin GK-3-54HGb-500M](https://comparepv.com/panel/gokin-gk-3-54hgb-500m) | 500 W | +45 W, cooler, +1.2 pp | | [Just Solar JST-M10-M-54-MH-415W](https://comparepv.com/panel/just-solar-jst-m10-m-54-mh-415w) | 415 W | -40 W, -2.0 pp | | [Just Solar JST-M10-M-54-MH-420W](https://comparepv.com/panel/just-solar-jst-m10-m-54-mh-420w) | 420 W | -35 W, -1.8 pp | | [Just Solar JST-M10-M-54-MH-425W](https://comparepv.com/panel/just-solar-jst-m10-m-54-mh-425w) | 425 W | -30 W, -1.5 pp | | [Just Solar JST-M10-M-54-MH-430W](https://comparepv.com/panel/just-solar-jst-m10-m-54-mh-430w) | 430 W | -25 W, -1.3 pp | | [Just Solar JST-M10-M-54-MH-435W](https://comparepv.com/panel/just-solar-jst-m10-m-54-mh-435w) | 435 W | -20 W, -1.0 pp | | [Just Solar JST-EDMH-(445-465)W-TD (445W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-445w-class) | 445 W | -10 W, -0.5 pp | | [Just Solar JST-EDMH-(445-465)W-TD (450W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-450w-class) | 450 W | -0.2 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +55 W, cooler, +1.7 pp | --- Source: https://comparepv.com/panel/just-solar-jst-edmh-455w-td Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.