--- title: "JA Solar MYM2054-270 270W Solar Panel - Specs & Review | ComparePV" description: "JA Solar MYM2054-270 270W solar panel. Specs: 21.20% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/ja-solar-mym2054-270" updated: 2026-09-11 --- # JA Solar MYM2054-270 Efficiency leader, heavy for its output 74 panels in the segment PERC 250-300 W ## Identity - **Manufacturer:** JA Solar - **Model:** MYM2054-270 - **Series:** M2 series - **Rated power:** 270 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 250-300 W (74 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 270 W | 275 W | Typical | | | Module efficiency | 21.20% | 17.21% | Strong - top 5% | 9,076 | | Power density | 183.9 | 172.1 | Strong - top 12% | 13,119 | | Temperature coefficient | -0.370 | -0.370 | Typical | 13,081 | | Weight (kg) | 19.0 kg | 18.5 kg | Weak - bottom 19% | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.20% | 17.21% | Strong - top 5% | 9,076 | | Power density | 183.9 | 172.1 | Strong - top 12% | 13,119 | | Temperature coefficient | -0.370 | -0.370 | Typical | 13,081 | | Weight per kWp | 70.4 | 66.5 | Weak - bottom 19% | 13,426 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Strengths - **21.20% module efficiency** - Top 5% of the PERC 250-300 W segment, against a median of 17.21%. Ranked 9,076th in the whole database. - **183.9 watts per square metre** - Top 12% of the PERC 250-300 W segment, against a median of 172.1. ### Watch out for - **70.4 kg per kWp** - Bottom 19% of the PERC 250-300 W segment, against a median of 66.5. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 270 W - **Efficiency:** 21.20 % - **Voltage at Pmax (Vmp):** 28.89 V - **Current at Pmax (Imp):** 9.35 A - **Open-circuit voltage (Voc):** 34.84 V - **Short-circuit current (Isc):** 9.75 A - **Max system voltage:** 600 V ### Temperature - **Temperature coefficient of Pmax:** -0.370 %/degC - **Temperature coefficient of Voc:** -0.290 %/degC - **Temperature coefficient of Isc:** 0.048 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 54 ### Physical - **Length:** 1480 mm - **Width:** 992 mm - **Thickness:** 35 mm - **Weight:** 19.0 kg - **Area:** 1.47 m2 - **Power density:** 183.9 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 25 years ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 9076 of 14005 | | Power density | 13119 of 14005 | | Temperature coefficient | 13081 of 14005 | | Weight | 13426 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Half-cut cells + MBB technology** - Splitting cells in half reduces internal resistive losses by approximately 50%, while multi-busbar (MBB) interconnects lower the impact of microcracks and improve partial-shading tolerance. In practice, this results in more stable string output under the non-uniform irradiance typical of pitched rooftops. - **BNEF Tier-1 bankable manufacturer** - JA Solar is listed on the BNEF Tier-1 Q1 2026 ranking with annual production capacity exceeding 80 GW. Tier-1 bankable status means that lenders accept these modules as project collateral and that the 25-year linear power warranty is backed by the manufacturer's verified financial standing. - **11 variants: 270–385 Wp** - A broad power range allows system designers to match module output to varying roof sizes and load requirements without accepting oversized wattage bins, and enables precise string sizing to minimize MPPT balancing losses. - **Up to 21.2% module efficiency** - Peak efficiency of 21.2% ties with MY Solar M2 (21.2%) and exceeds both Solarwatt Panel vision GM 3.0 pure (20.7%) and KB Solar KBS-MONO-BF (20.9%) from the peer-comparable set — placing this P-type PERC series at the top of the reference group. ## Cons - **Series discontinued (EOL 2021)** - The M2 series went end-of-life around 2021. This eliminates access to replacement modules for warranty claims, creates a visual and electrical mismatch risk if the array is later expanded, and limits ongoing technical support — a material operational risk for installations expected to run 25+ years. - **PERC technology — inferior to TOPCon/HJT** - P-type PERC cells carry a temperature coefficient of Pmax ≈ -0.35%/°C versus -0.30%/°C for TOPCon modules, which captured roughly 65% of global production in 2024. Annual PERC degradation runs 0.45–0.55% versus 0.30–0.40% for TOPCon; over the 25-year warranty horizon, the cumulative energy yield gap can reach 3–7 percentage points in favor of modern TOPCon alternatives. ## About this series The JA Solar M2 series consists of modules designed for high energy yield in real-world conditions, where factors such as shading, different mounting angles, and limited roof space are important. The use of **half-cut technology** reduces internal losses and helps maintain stable performance even when part of the panel is exposed to less light. Monocrystalline PERC cells and **multi-busbar connections (MBB)** support efficient current collection and minimize the impact of micro-cracks on long-term performance. In practice, the M2 series solves common problems associated with residential and commercial solar installations - it improves tolerance to shading, simplifies string design, and provides predictable yields during transitional seasons. It is a good choice for single-family homes, small businesses, and rooftop installations with limited load-bearing capacity, where a **lightweight design** and simpler installation are important. Compared to the competition, the series stands out due to its **consistent 182 mm platform**, which is meticulously designed for durability and stability over time. ## Notable figures - Efficiency of 21.2% is 1.8pp above the \*\*PERC 0-400W\*\* median (19.4%) - At 183.9 W/m², this panel generates 10.5 W/m² less per unit area than \*\*PERC 0-400W\*\* median (194.4 W/m²) - At -0.37%/°C, hot weather performance is typical for \*\*PERC 0-400W\*\* panels - At 19.0 kg, this panel is 1.5 kg lighter than \*\*PERC 0-400W\*\* median (20.5 kg) - easier handling during installation - In the top 65% for efficiency among all PERC panels ## Questions ### Is the JA Solar M2 series still available for purchase? The JA Solar M2 series has been discontinued and is no longer actively offered by the manufacturer or most distributors. Limited stock may still exist at some wholesalers, but availability is restricted. If you are looking for a similar PERC half-cut module on the 182 mm cell platform, ask your supplier about a current JA Solar replacement, such as the Deep Blue series. ### What warranty does the JA Solar M2 series carry? JA Solar provides a 12-year product warranty covering defects in materials and workmanship, along with a 25-year linear power warranty. After 25 years the module should retain at least 80–83% of its rated output. Should the series be unavailable at the time of a warranty claim, JA Solar may fulfill the claim by supplying a replacement module with comparable specifications. ### Do JA Solar M2 panels perform well under partial shading? Yes. The half-cut cell design means shading from a chimney, antenna, or dormer window only reduces output in the affected row of cells, rather than limiting the entire module. Multi-busbar (MBB) interconnections further shorten current paths and reduce the impact of microcracks, which matters on rooftops exposed to variable lighting conditions throughout the day. ### What is the maximum power output of a JA Solar M2 module? JA Solar M2 series modules reach a peak output of up to 385 Wp under STC conditions. The series is based on monocrystalline PERC cells in the 182 mm format, and the combination of half-cut architecture and MBB interconnections delivers high efficiency in a relatively compact footprint — an advantage for rooftops with limited usable area. ### Are JA Solar M2 modules suitable for a pitched residential rooftop? Yes, the M2 series was designed with residential prosumer installations in mind, including standard pitched rooftops. Its lighter construction and 182 mm platform make on-roof handling and racking straightforward. PERC half-cut cells handle varying sun angles well across seasons, improving energy yield during spring and autumn transition months. ### Is the JA Solar M2 series a bifacial panel? No, JA Solar M2 modules are monofacial — power is generated solely by the front surface. They do not capture reflected light from the ground the way bifacial panels do. This is a standard configuration for rooftop installations where the back of the module sits flush against the mounting structure with no meaningful access to reflected irradiance. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/MYM2054-1-d0adfb301820.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar NS-300MH-72](https://comparepv.com/panel/ja-solar-ns-300mh-72) | 300 W | Cooler, lighter, +2.1 pp | | [PolyCrown Solar Tech NS-300MH-72](https://comparepv.com/panel/polycrown-solar-tech-ns-300mh-72) | 300 W | Cooler, lighter, +2.1 pp | | [Heckert Solar ZEUS 1.2 FullBlack 280W](https://comparepv.com/panel/heckert-solar-zeus-1-2-fullblack-280w) | 280 W | Cooler, +2.1 pp, +5 yr warranty | | [Gamko New Energy GKA182M285W](https://comparepv.com/panel/gamko-new-energy-gka182m285w) | 285 W | Lighter, +1.8 pp, +5 yr warranty | | [Gamko New Energy GKA182M240W](https://comparepv.com/panel/gamko-new-energy-gka182m240w) | 240 W | Lighter, +1.8 pp, +5 yr warranty | | [Gamko New Energy GKA182M260W](https://comparepv.com/panel/gamko-new-energy-gka182m260w) | 260 W | Lighter, +1.8 pp, +5 yr warranty | | [Gamko New Energy GKA182M270W](https://comparepv.com/panel/gamko-new-energy-gka182m270w) | 270 W | Lighter, +1.8 pp, +5 yr warranty | | [Gamko New Energy GKA182M300W](https://comparepv.com/panel/gamko-new-energy-gka182m300w) | 300 W | +30 W, +1.8 pp, +5 yr warranty | | [Gamko New Energy GKA210M320W](https://comparepv.com/panel/gamko-new-energy-gka210m320w) | 320 W | +50 W, +1.8 pp, +5 yr warranty | | [MY Solar MYM2054-270](https://comparepv.com/panel/my-solar-mym2054-270) | 270 W | Very close match | | [Gamko New Energy GKA157F300W](https://comparepv.com/panel/gamko-new-energy-gka157f300w) | 300 W | +30 W, -0.8 pp, +5 yr warranty | | [JA Solar MYP3054-270](https://comparepv.com/panel/ja-solar-myp3054-270) | 270 W | Lighter, -3.2 pp | | [MY Solar MYP3054-270](https://comparepv.com/panel/my-solar-myp3054-270) | 270 W | Lighter, -3.2 pp | | [JA Solar MYP3054-265](https://comparepv.com/panel/ja-solar-myp3054-265) | 265 W | Lighter, -3.5 pp | | [MY Solar MYP3054-265](https://comparepv.com/panel/my-solar-myp3054-265) | 265 W | Lighter, -3.5 pp | | [JA Solar MYP3054-260](https://comparepv.com/panel/ja-solar-myp3054-260) | 260 W | -10 W, lighter, -3.9 pp | --- Source: https://comparepv.com/panel/ja-solar-mym2054-270 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.