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JA Solar MYP3072-340
JA Solar Brand review

MYP3072-340

340 Wp PERC
ComparePV verdict

Middle of its segment, modest efficiency

Rank 13,421 of 14,129
Compare panels Datasheet PDF
Power (Wp)
340
Strong · top 12%
Efficiency (%)
17.17
Weak · bottom 20%
Density (Wp/m²)
171.7
Weak · bottom 20%
Temp (%/°C)
-0.370
Typical · median -0.360
Weight (kg)
22.3
Typical · median 19.0 kg
Warranty (yrs)
25
Typical · median 25 yrs

The JA Solar P3 series consists of modules designed to maximize energy yield under real-world conditions - particularly when the installation operates at high temperatures, with reduced sunlight, or on a demanding roof. It is distinguished by n-type cell technology with passivated contact (Bycium+), which helps to minimize power losses over time and stabilize the installation's performance. The use of SMBB (multi-busbar structure) improves current collection from the cell and increases resistance to microcracks, which translates to improved reliability in operation.

An additional advantage is high-density encapsulation and a refined connection architecture, which allows the module to better withstand partial shading and reduces the risk of local overheating. The P3 series is particularly suitable for residential, commercial, and large-scale installations, where lower system costs (BOS) and reliable energy yield over the years are important. In practice, it distinguishes itself through its focus on energy yield and durability, rather than just catalog specifications.

Ranking

291 panels in the segment PERC 300-350 W
Metric This panel Median Position in segment Overall rank
Module efficiency 17.17% 19.00% Weak · bottom 20% 13,531
Power density 171.7 190.0 Weak · bottom 20% 13,523
Temperature coefficient -0.370 -0.360 Typical 13,161
Weight per kWp 65.6 60.3 Typical 13,205
Performance warranty 25 yrs 25 yrs Typical 9,912
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

4 positive · 6 caution
Best for

Residential, commercial and hot-climate.

Not ideal for

Tight roof space and roofs where every square metre has to count.

Watch-outs
17.17% module efficiency

Bottom 20% of the PERC 300-350 W segment, against a median of 19.00%.

171.7 watts per square metre

Bottom 20% of the PERC 300-350 W segment, against a median of 190.0.

What owners get
BNEF Tier 1 manufacturer - confirmed bankability

JA Solar (founded 2005, production capacity >80 GW/year) has maintained continuous BNEF Tier 1 status, enabling non-recourse project financing and significantly reducing guarantor insolvency risk over a 25-year operational horizon.

25 variants across 160-355 Wp range

The broad power selection (160-355 Wp, 25 SKUs) allows a single-supplier approach covering both small residential rooftop systems with limited roof area and commercial-scale installations, simplifying documentation and service contracts.

Multi-busbar SMBB construction

The SMBB design (≥9 busbars) reduces cell internal resistance, improves micro-crack tolerance, and limits shading losses compared to legacy 3-5 BB configurations, realistically extending the module's mechanical service life.

25-year linear power output warranty

JA Solar guarantees ≥80% of rated power after 25 years, backed by a 12-year product warranty - the same standard as Tier-1 peers (Trina, LONGi), which facilitates project insurance and bankable energy yield projections.

Trade-offs
PERC - a maturing-out technology

PERC's global module shipment share collapsed from >80% in 2022 to <25% in Q1 2026, while TOPCon reached ~65% market share. Purchasing PERC modules in 2026 risks supply chain gaps for capacity additions or replacements within 3-5 years, as active production winds down and spare-part premiums rise.

Efficiency 15.69-18.01% vs. TOPCon standard

Commercial TOPCon modules achieved 20-23% efficiency in 2026 (JA Solar DeepBlue 4.0 Pro: ~22.5%). For a 10 kWp system, the P3 series requires approximately 10-15% more roof area than a comparable n-type TOPCon module, which may be a binding constraint on smaller rooftops.

Higher LID than n-type technologies

PVEL 2025 testing shows 78% of PERC BOMs lose 1.5-2.5% power in year one due to Light-Induced Degradation (LID), versus <0.5% for n-type TOPCon. Long-term annual degradation for PERC averages 0.45-0.55% vs. 0.30-0.40% for TOPCon, resulting in ~1-2% lower cumulative energy output after 25 years.

No bifacial option available

The P3 series is monofacial only (is_bifacial: false), while comparable peer Bisol Spectrum (360 Wp, 18% efficiency) offers a bifacial variant. In ground-mount or flat-roof installations with a light-colored substrate, the absence of bifaciality translates to a 5-15% loss in potential annual energy yield.

Notes from the database
  • Module efficiency of 17.2% is 2.3pp below average for PERC 0-400W panels (median: 19.4%)
  • Power density of 171.7 W/m² is 22.5 W/m² below PERC 0-400W median (194.2 W/m²) - needs more roof space
  • At -0.37%/°C, hot weather performance is typical for PERC 0-400W panels
  • Weight of 22.3 kg is 1.8 kg above PERC 0-400W median (20.5 kg) - verify structural support
  • In the top 96% for efficiency among all PERC panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 340 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 17.17 % Weak Segment median 19.00%
Vmpp · Impp 37.60 V · 9.04 A Operating point at max power
Voc · Isc 45.90 V · 9.56 A Sizes the string length
Max system voltage 1000 V Longer strings than 1000 V modules
Dimensions 1980×1000×35 mm · 1.98 m² of roof
Weight 22.3 kg Typical Typical · median 19.0 kg
Cells 72 · PERC Polycrystalline
Coefficient Pmax -0.370 %/°C Typical median -0.360 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
Degradation 2.50 % First year

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 -0.360
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
JA Solar MYP3072-340 340 W 17.17% -0.370 22.3 kg You are here
LNSK-340M 340 W 20.08% -0.360 21.0 kg Cooler, lighter, +2.9 pp
CS3K-330P 330 W 19.90% -0.360 18.5 kg Cooler, lighter, +2.7 pp
CS3K-335MB-AG 335 W 19.90% -0.360 22.3 kg Cooler, +2.7 pp, +5 yr warranty
LNSK-335M 335 W 19.78% -0.360 21.0 kg Cooler, lighter, +2.6 pp
CS3L-365P 365 W 19.70% -0.360 21.1 kg +25 W, lighter, +2.5 pp
CS3U-390P 390 W 19.70% -0.360 22.5 kg +50 W, cooler, +2.5 pp
CS3K-325P 325 W 19.60% -0.360 18.5 kg -15 W, lighter, +2.4 pp
MYP3072-335 335 W 16.92% -0.370 22.3 kg -0.2 pp
MYP3072-345 345 W 17.42% -0.370 22.3 kg +0.2 pp
MYP3072-350 350 W 17.68% -0.370 22.3 kg +10 W, +0.5 pp
MYP3072-355 355 W 17.93% -0.370 22.3 kg +15 W, +0.8 pp
MYM3072-380 380 W 19.16% -0.370 23.0 kg +40 W, +2.0 pp
MYM3072-385 385 W 19.42% -0.370 23.0 kg +45 W, +2.2 pp
MYM3072-390 390 W 19.67% -0.370 23.0 kg +50 W, +2.5 pp
MYM3072-395 395 W 19.92% -0.370 23.0 kg +55 W, +2.8 pp
MYM3072-400 400 W 20.17% -0.370 23.0 kg +60 W, +3.0 pp
SPR-MAX7-475 475 W 24.00% -0.270 21.1 kg +135 W, +6.8 pp, +15 yr warranty

Found 98 panels of the same or similar size to this one, within ±10 mm. See them here Found 313 panels of the same or similar size to this one, within ±25 mm. See them here Found 454 panels of the same or similar size to this one, within ±50 mm. See them here Found 563 panels of the same or similar size to this one, within ±100 mm. See them here

About the P3 series series

6 answered

These answers cover the whole series. Where a figure differs, the specification above is this module's own.

What warranty comes with JA Solar P3 series panels?
The JA Solar P3 series includes a 12-year product warranty covering material and workmanship defects, plus a 25-year linear power output warranty guaranteeing at least 80% of rated power after 25 years. The annual degradation rate is approximately 0.55%, which is consistent with Tier 1 module performance and makes the P3 series a reliable long-term investment for residential and commercial installations.
Do JA Solar P3 panels perform well in cloudy or low-light conditions?
Yes, the P3 series is specifically engineered for real-world conditions. The SMBB (Smart Multi-Busbar) cell architecture improves current collection under diffuse irradiance, and the optimized encapsulation reduces losses from partial shading. A low temperature coefficient further limits power drops on hot summer days. These characteristics are particularly relevant in Central European climates with limited peak-sun hours.
What is SMBB technology in JA Solar P3 modules and does it actually matter?
SMBB replaces the traditional 3-5 wide busbars with a grid of thin round wires, shortening the current path within the cell. The practical benefits are twofold: higher energy yield due to reduced resistive losses, and better mechanical reliability because the thinner wires distribute stress more evenly and make cells less prone to micro-cracking. For system owners, this means slower power degradation over the module's 25-year warranty period.
Are JA Solar P3 modules rated up to 355 Wp suitable for a standard sloped residential roof?
Yes, the P3 series is designed with residential rooftop installations in mind. The module dimensions and weight are compatible with standard racking systems used on pitched roofs with metal tile or ceramic tile coverings. The P3 is a monofacial panel, so it does not require special reflective underlays and works well on south-facing as well as east-west split roof orientations.
How do JA Solar P3 panels differ from conventional PERC modules without SMBB?
Standard PERC modules with 3-5 busbars have higher resistive losses inside the cell. The P3 series combines the PERC passivation layer with SMBB cell interconnection and high-density encapsulation, resulting in a higher Performance Ratio, reduced hot-spot risk, and lower Balance of System (BoS) costs for the same installed wattage. The practical outcome is a better energy yield per dollar invested over the system's lifetime.
Is JA Solar a reliable manufacturer - should I choose the P3 series over European-made panels?
JA Solar consistently appears on Tier 1 lists from major PV rating agencies including Bloomberg NEF and PVEL, confirming the financial strength needed to honor long-term warranties. The company holds IEC 61215 and IEC 61730 certifications and is among the top global module manufacturers by shipped volume. An authorized distribution and warranty service network operating in Poland means local support is available throughout the 25-year power warranty period.
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