--- title: "JA Solar MYM6144-430 430W Solar Panel - Specs & Review | ComparePV" description: "JA Solar MYM6144-430 430W solar panel. Specs: 19.46% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/ja-solar-mym6144-430" updated: 2026-09-11 --- # JA Solar MYM6144-430 Middle of its segment, weak in heat 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** JA Solar - **Model:** MYM6144-430 - **Series:** M6 series - **Rated power:** 430 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 400-450 W (954 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 430 W | 410 W | Typical | | | Module efficiency | 19.46% | 20.60% | Weak - bottom 4% | 12,713 | | Power density | 194.6 | 206.2 | Weak - bottom 5% | 12,681 | | Temperature coefficient | -0.390 | -0.350 | Weak - bottom 1% | 13,579 | | Weight (kg) | 25.6 kg | 22.0 kg | Weak - bottom 13% | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 19.46% | 20.60% | Weak - bottom 4% | 12,713 | | Power density | 194.6 | 206.2 | Weak - bottom 5% | 12,681 | | Temperature coefficient | -0.390 | -0.350 | Weak - bottom 1% | 13,579 | | Weight per kWp | 59.5 | 53.0 | Weak - bottom 13% | 12,194 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Watch out for - **-0.390 %/°C temperature coefficient** - Bottom 1% of the PERC 400-450 W segment, against a median of -0.350. Ranked 13,579th in the whole database. - **19.46% module efficiency** - Bottom 4% of the PERC 400-450 W segment, against a median of 20.60%. Ranked 12,713th in the whole database. - **194.6 watts per square metre** - Bottom 5% of the PERC 400-450 W segment, against a median of 206.2. Ranked 12,681st in the whole database. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Hot climates, tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 430 W - **Efficiency:** 19.46 % - **Voltage at Pmax (Vmp):** 40.72 V - **Current at Pmax (Imp):** 10.56 A - **Open-circuit voltage (Voc):** 48.69 V - **Short-circuit current (Isc):** 11.07 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.390 %/degC - **Temperature coefficient of Voc:** -0.300 %/degC - **Temperature coefficient of Isc:** 0.060 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 144 ### Physical - **Length:** 2108 mm - **Width:** 1048 mm - **Thickness:** 35 mm - **Weight:** 25.6 kg - **Area:** 2.21 m2 - **Power density:** 194.6 Wp/m2 ### Warranty and degradation - **Product warranty:** 10 years - **Performance warranty:** 25 years ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12713 of 14005 | | Power density | 12681 of 14005 | | Temperature coefficient | 13579 of 14005 | | Weight | 12194 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Half-cut PERC + multi-busbar design** - The half-cut cell architecture combined with multi-busbar (MBB) layout reduces series resistance and limits micro-crack losses. According to the JAM60S20 datasheet, JA Solar claims improved shading tolerance and lower hot-spot risk compared to standard full-cell modules with fewer busbars. - **BNEF Tier-1 – confirmed bankability** - JA Solar has maintained BNEF Tier-1 status continuously for over a decade, including the March 2026 edition. This means M6-series modules are accepted by banks financing non-recourse projects, directly affecting the availability and cost of project financing. - **25-year linear power warranty** - The manufacturer provides a 25-year linear power output warranty across all variants in the series — the Tier-1 segment standard — giving investors a solid basis for LCOE modeling over the full project payback period. - **Wide power range – 11 variants (195–455 Wp)** - The series spans 11 variants from 195 to 455 Wp, enabling module selection for small residential rooftops with limited area as well as larger commercial projects, simplifying BoS without mixing series. ## Cons - **Series discontinued (2022)** - JA Solar ceased production of the M6 series around 2022. Availability of new units on the secondary market is limited, and sourcing replacements for damaged modules may become increasingly difficult over the next 15–20 years of system operation. - **Efficiency up to 20.6% — well below peer comparables** - The series peaks at 20.6% module efficiency, while direct peer comparables reach 22.56–22.80% (Solitek SOLRIF D Black 22.56%, LEDVANCE M435~455N54LB-SF-F7 22.77%, Sunlike Solar SKT420~455M10-108D6 22.80%). The ~2.2 pp gap translates to roughly 11% more panel area required for the same target system capacity. - **Minimum product warranty only 10 years** - Some variants in the series carry only a 10-year product warranty (range: 10–12 years across SKUs). Current Tier-1 competitors standardly offer 12–15-year product warranties, placing the lower-end M6 SKUs below present market expectations. - **Monofacial only — no rear-side yield** - The M6 series is not bifacial, excluding additional energy yield from ground-reflected albedo. On high-albedo surfaces (gravel, concrete, snow), bifacial modules typically generate 5–15% more energy per year at no additional land cost. ## About this series The JA Solar M6 series (including models such as JAM60S20 and similar variants) utilizes **monocrystalline PERC** cells in a **half-cut** configuration, which provides more stable performance in real-world rooftop and ground-mounted applications. Thanks to the **multi-busbar** architecture, the current is distributed more evenly across the cell, reducing losses due to micro-cracks and improving long-term energy yield. This design also enhances **shade tolerance** - when a shadow falls on a portion of the module, the rest of the system continues to function effectively, rather than causing a sudden drop in power output. The M6 series is a good choice for investors who want to combine high power density with reasonable dimensions - both for typical residential installations and larger commercial projects, where installation time and ease of integration are important factors. A key advantage of this series is **lower risk of hot spots**, which translates into greater safety and predictable energy yields over the long term. ## Notable figures - Efficiency of 19.5% is 1.1pp below the \*\*PERC 400-450W\*\* median (20.6%) - At 194.6 W/m², this panel generates 11.6 W/m² less per unit area than \*\*PERC 400-450W\*\* median (206.2 W/m²) - -0.39%/°C temperature coefficient - 0.04pp worse than \*\*PERC 400-450W\*\* median (-0.35%/°C), expect higher hot weather losses - Weight of 25.6 kg is 3.6 kg above \*\*PERC 400-450W\*\* median (22.0 kg) - verify structural support - In the top 91% for efficiency among all PERC panels ## Questions ### Is the JA Solar M6 series (JAM60S20) still available for purchase? The JA Solar M6 series, including the JAM60S20 model, has been discontinued. New units are no longer in regular distribution — only residual stock may occasionally be found. If you need a current JA Solar alternative with comparable performance, consider newer TOPCon-based series such as the Deep Blue 4.0, which deliver higher efficiency in a similar footprint. ### What warranties does the JA Solar M6 series carry — product and power output? JA Solar provides a 12-year product warranty covering defects in materials and workmanship, plus a 25-year linear power output warranty. After 25 years of operation the module should retain at least 80.7% of its rated power. These are standard Tier-1 conditions that provide reliable return-on-investment predictability over the full system lifetime. ### What is PERC half-cut technology with multi-busbar and what does it mean for the M6 series in real-world use? PERC half-cut cells are split in two, reducing internal resistance and lowering current losses per cell. The multi-busbar layout distributes current more evenly across the cell, reducing interconnection stress and minimizing microcracks. In practice, M6 modules maintain higher energy yield over time and tolerate localized cell damage better than older full-cell modules. ### What is the maximum power output of the JA Solar M6 panel and what are the module dimensions? The top variant in the M6 series reaches 455 Wp. The standard module (120 cells, 6×20 layout) measures approximately 1769×1052×35 mm and weighs about 20.5 kg. These dimensions make rooftop transport and installation on standard aluminum racking straightforward without the need for heavy lifting equipment. ### How well does the JA Solar M6 handle partial shading — for example from a chimney or dormers? The half-cut architecture splits the module into two electrically independent halves, so shade on the lower portion does not fully suppress output from the upper half. Combined with multi-busbar cell interconnection, this also reduces hot-spot risk in shaded areas. The M6 series performs noticeably better under partial shading than older full-cell modules, making it well-suited for rooftops with chimneys, antennas, or adjacent obstructions. ### Is JA Solar a reliable manufacturer and are the M6 series warranties financially secure? JA Solar is classified as a Tier-1 manufacturer by independent industry agencies, including BloombergNEF, confirming the financial stability and operational capacity required to back long-term warranty obligations. The company is one of the world's largest PV module suppliers with a well-established presence in European markets. The M6 series was produced during a period when the brand had already solidified its global reputation. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Product-specification-MYM6144-430-455-a39bb1e33f74.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A480-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a480-mah54mw) | 480 W | +50 W, cooler, +4.6 pp | | [Gokin GK-5-54HG-480M](https://comparepv.com/panel/gokin-gk-5-54hg-480m) | 480 W | +50 W, cooler, +4.6 pp | | [Jinko Solar JKM480N-48QL6-DB-F2-EU](https://comparepv.com/panel/jinko-solar-jkm480n-48ql6-db-f2-eu) | 480 W | +50 W, cooler, +4.6 pp | | [Gamko New Energy GKA96N-PRO-480W](https://comparepv.com/panel/gamko-new-energy-gka96n-pro-480w) | 480 W | +50 W, cooler, +4.6 pp | | [JA Solar JAM72D20-435/MB/1500V](https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam72d20-435-mb-1500v) | 435 W | Cooler, heavier, +5 yr warranty | | [JA Solar MYM6144-435](https://comparepv.com/panel/ja-solar-mym6144-435) | 435 W | +0.2 pp | | [JA Solar JAM72D20-440/MB/1500V](https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam72d20-440-mb-1500v) | 440 W | Cooler, heavier, +5 yr warranty | | [JA Solar MYM6144-440](https://comparepv.com/panel/ja-solar-mym6144-440) | 440 W | +10 W, +0.5 pp | | [JA Solar JAM72S20-445/MR](https://comparepv.com/panel/ja-solar-jam72s20-445-mr-1) | 445 W | +15 W, cooler, +0.5 pp | | [JA Solar JAM72D20-445/MB/1500V](https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam72d20-445-mb-1500v) | 445 W | Cooler, +0.5 pp, +5 yr warranty | | [JA Solar MYM6144-445](https://comparepv.com/panel/ja-solar-mym6144-445) | 445 W | +15 W, +0.7 pp | | [JA Solar JAM72S20-450/MR](https://comparepv.com/panel/ja-solar-jam72s20-450-mr-1) | 450 W | +20 W, cooler, +0.8 pp | | [JA Solar JAM72D20-450/MB/1500V](https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam72d20-450-mb-1500v) | 450 W | Cooler, +0.7 pp, +5 yr warranty | | [Gamko New Energy GKA120N-PRO-590W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-590w) | 590 W | +160 W, cooler, +4.4 pp | | [Gamko New Energy GKA120N-PRO-585W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-585w) | 585 W | +155 W, cooler, +4.2 pp | | [Bisol BGO 580](https://comparepv.com/panel/bisol-bgo-580) | 580 W | +150 W, cooler, +4.0 pp | --- Source: https://comparepv.com/panel/ja-solar-mym6144-430 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.