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JA Solar MYM2054-270
JA Solar Brand review

MYM2054-270

270 Wp PERC
ComparePV verdict

Efficiency leader, heavy for its output

Rank 13,024 of 14,005
Compare panels Datasheet PDF
Power (Wp)
270
Typical for its class
Efficiency (%)
21.20
Strong · top 5%
Density (Wp/m²)
183.9
Strong · top 12%
Temp (%/°C)
-0.370
Typical · median -0.370
Weight (kg)
19.0
Weak · bottom 19%
Warranty (yrs)
25
Typical · median 25 yrs

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.

Ranking

74 panels in the segment PERC 250-300 W
Metric This panel Median Position in segment Overall 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
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

6 positive · 3 caution
Best for

Residential, commercial and shaded-installations.

Not ideal for

Weight-limited structures.

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-outs
70.4 kg per kWp

Bottom 19% of the PERC 250-300 W segment, against a median of 66.5.

What owners get
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.

Trade-offs
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.

Notes from the database
  • 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

Specifications

Open datasheet PDF
Nominal power (Pmax) 270 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.20 % Strong Segment median 17.21%
Vmpp · Impp 28.89 V · 9.35 A Operating point at max power
Voc · Isc 34.84 V · 9.75 A Sizes the string length
Max system voltage 600 V Longer strings than 1000 V modules
Dimensions 1480×992×35 mm · 1.47 m² of roof
Weight 19.0 kg Weak Weak · bottom 19%
Cells 54 · PERC Monocrystalline
Coefficient Pmax -0.370 %/°C Typical median -0.370 of its segment
Coefficient Voc · Isc -0.290 · 0.048 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 25 years Typical median 25 yrs · median 25 yrs

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
-0.370 %/°C against a segment median of -0.370
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
JA Solar MYM2054-270 270 W 21.20% -0.370 19.0 kg You are here
NS-300MH-72 300 W 23.32% -0.290 12.5 kg Cooler, lighter, +2.1 pp
NS-300MH-72 300 W 23.32% -0.290 12.5 kg Cooler, lighter, +2.1 pp
ZEUS 1.2 FullBlack 280W 280 W 23.31% -0.260 14.3 kg Cooler, +2.1 pp, +5 yr warranty
GKA182M285W 285 W 23.00% - 10.8 kg Lighter, +1.8 pp, +5 yr warranty
GKA182M240W 240 W 23.00% - 10.8 kg Lighter, +1.8 pp, +5 yr warranty
GKA182M260W 260 W 23.00% - 10.8 kg Lighter, +1.8 pp, +5 yr warranty
GKA182M270W 270 W 23.00% - 10.8 kg Lighter, +1.8 pp, +5 yr warranty
GKA182M300W 300 W 23.00% - 16.2 kg +30 W, +1.8 pp, +5 yr warranty
GKA210M320W 320 W 23.00% - 16.2 kg +50 W, +1.8 pp, +5 yr warranty
MYM2054-270 270 W 21.20% -0.370 19.0 kg Very close match
GKA157F300W 300 W 20.43% - - +30 W, -0.8 pp, +5 yr warranty
MYP3054-270 270 W 18.00% -0.370 16.9 kg Lighter, -3.2 pp
MYP3054-270 270 W 18.00% -0.370 16.9 kg Lighter, -3.2 pp
MYP3054-265 265 W 17.67% -0.370 16.9 kg Lighter, -3.5 pp
MYP3054-265 265 W 17.67% -0.370 16.9 kg Lighter, -3.5 pp
MYP3054-260 260 W 17.33% -0.370 16.9 kg -10 W, lighter, -3.9 pp

Found 16 panels of the same or similar size to this one, within ±10 mm. See them here Found 26 panels of the same or similar size to this one, within ±25 mm. See them here Found 26 panels of the same or similar size to this one, within ±50 mm. See them here Found 26 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
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.
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