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JA Solar JAT54S41-465/LR
JA Solar Brand review

JAT54S41-465/LR

465 Wp TOPCon
ComparePV verdict

Light for its output, no clear weak spot

Rank 4,577 of 14,129
Compare panels Datasheet PDF
Power (Wp)
465
Typical for its class
Efficiency (%)
23.30
Strong · top 9%
Density (Wp/m²)
232.7
Strong · top 10%
Temp (%/°C)
-0.260
Strong · top 3%
Weight (kg)
19.3
Strong · 4.7 kg below median
Warranty (yrs)
30
Typical · median 30 yrs

The JA Solar JAT54S41 LR (Black n-type Monofacial Module) series was designed with rooftop installations in mind, focusing on maximizing energy production from limited surfaces and stable performance over years. The use of TOPCon n-type cells translates into extremely low light-induced degradation susceptibility, enabling the module to maintain high efficiency in real-world conditions. In practice, this means more predictable yields and fewer disappointments after a few seasons.

Another noteworthy feature is the monofacial roof-optimized construction - easier to design and less sensitive to installation errors compared to bifacial solutions. This series offers optimized performance under low irradiance, which aids on cloudy days and in the morning and evening, when many modules noticeably lose efficiency. Additionally, better performance at higher temperatures supports energy production during the summer months when the roof heats up significantly.

This is an excellent choice for single-family homes, multi-family buildings, and aesthetically demanding projects where All-Black appearance is key, without compromising on technology.

Ranking

1,096 panels in the segment TOPCon 450-500 W
Metric This panel Median Position in segment Overall rank
Module efficiency 23.30% 22.52% Strong · top 9% 1,057
Power density 232.7 225.2 Strong · top 10% 1,156
Temperature coefficient -0.260 -0.290 Strong · top 3% 515
Weight per kWp 41.5 52.2 Strong · top 1% 180
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

8 positive · 1 caution
Best for

Residential, commercial and hot-climate.

Strengths
41.5 kg per kWp

Top 1% of the TOPCon 450-500 W segment, against a median of 52.2. Ranked 180th in the whole database.

-0.260 %/°C temperature coefficient

Top 3% of the TOPCon 450-500 W segment, against a median of -0.290. Ranked 515th in the whole database.

23.30% module efficiency

Top 9% of the TOPCon 450-500 W segment, against a median of 22.52%. Ranked 1,057th in the whole database.

What owners get
Highest efficiency in its class

The 22.8-24% efficiency range outperforms all listed peer comparables: Sunket SKT460~480M10-120D3 peaks at 22.24%, Shinson S-Blade at 22.24%, and First Solar Series 6 Plus Bifacial at only 19%. Even the bottom of the series (22.8%) beats the direct competition by more than 0.5 percentage points, translating to measurably higher annual energy yield per unit of roof area.

N-type TOPCon - near-zero LID/LeTID

N-type TOPCon cells are immune to LID (Light-Induced Degradation) and LeTID, which cause 1-2% first-few-weeks power loss in p-type PERC modules. Annual degradation for TOPCon is approximately 0.4% vs. 0.6-0.8% for PERC (NREL/JA Solar 2024 data), resulting in several additional percentage points of cumulative yield over a 30-year asset life.

30-year linear power warranty

The manufacturer guarantees ≥87.4% of nominal power after 30 years at ≤0.4% annual degradation. This surpasses the 25-year power warranties common among most Tier 1 peers. The product (materials and workmanship) warranty is 25 years.

JA Solar - BNEF Tier 1, bankable Q1 2026

JA Solar has maintained its position on the BNEF bankable manufacturers list continuously for multiple years and reported annual manufacturing capacity exceeding 100 GW as of Q1 2026. Tier 1 status streamlines non-recourse project financing and reduces residual risk for investors and insurance underwriters.

All Black - aesthetics without efficiency trade-off

Full-black aesthetics (black frame, black cells, black backsheet) are achieved at up to 24% front-side efficiency, with no technological compromise typically associated with lower-cost All Black modules built on older PERC cells. The monofacial architecture simplifies racking design and eliminates the albedo-management requirements that can introduce mounting errors on bifacial installations.

Trade-offs
No bifacial rear-side gain on flat roofs

The monofacial construction cannot harvest energy reflected from the ground or rooftop substrate. On flat-roof installations with light-colored ballast or membrane (albedo >15%), a bifacial module - even one with lower front-side efficiency such as First Solar Series 6 Plus (19%) - may capture an additional 5-12% generation from the rear. The gap is negligible on pitched rooftops, but for flat-roof projects a bifacial LCOE comparison is warranted.

Notes from the database
  • At 23.3% efficiency, this panel is 0.8pp above typical TOPCon 450-500W modules (median: 22.5%)
  • Power density of 232.7 W/m² packs 7.5 W/m² more into the same footprint vs TOPCon 450-500W median (225.2 W/m²)
  • At -0.26%/°C (vs median -0.29%/°C), loses ~1% less power in hot conditions
  • 19.3 kg weight - 4.7 kg lighter than TOPCon 450-500W median (24.0 kg), reducing installation effort
  • In the top 7% for efficiency among all TOPCon panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 465 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 23.30 % Strong Segment median 22.52%
Vmpp · Impp 34.60 V · 13.45 A Operating point at max power
Voc · Isc 40.89 V · 14.78 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1762×1134×30 mm · 2.00 m² of roof
Weight 19.3 kg Strong Strong · 4.7 kg below median
Cells 108 · TOPCon Monocrystalline
Coefficient Pmax -0.260 %/°C Strong top 3% of its segment
Coefficient Voc · Isc -0.220 · 0.050 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 25 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 406 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by JA Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 465 Wp appear here. The rest cover the whole series.

30-year Linear Performance Warranty 30-year Linear Performance Warranty Whole series

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
-0.260 %/°C against a segment median of -0.290
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
JA Solar JAT54S41-465/LR 465 W 23.30% -0.260 19.3 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +45 W, heavier, +1.7 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +30 W, heavier, +1.5 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +40 W, heavier, +1.4 pp
WST-505BKX54-A2 505 W 24.70% -0.260 25.0 kg +40 W, heavier, +1.4 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +25 W, heavier, +1.2 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +35 W, heavier, +1.2 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +35 W, heavier, +1.2 pp
NS-420MH-108 420 W 21.01% -0.290 24.5 kg -45 W, heavier, -2.3 pp
JAM54D41-430/LB 430 W 21.50% -0.290 22.0 kg -35 W, hotter, -1.8 pp
JAM54S40-435/LR 435 W 21.80% -0.290 20.0 kg -30 W, hotter, -1.5 pp
JAM54S40-440/LR 440 W 22.00% -0.290 20.0 kg -25 W, hotter, -1.3 pp

Found 1402 panels of the same or similar size to this one, within ±10 mm. See them here Found 1432 panels of the same or similar size to this one, within ±25 mm. See them here Found 3651 panels of the same or similar size to this one, within ±50 mm. See them here Found 3999 panels of the same or similar size to this one, within ±100 mm. See them here

About the JAT54S41 LR (Black n-type Monofacial Module) series

6 answered

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

What is TOPCon technology and why does the JA Solar JAT54S41 LR series use it?
TOPCon (Tunnel Oxide Passivated Contact) is an n-type cell architecture that minimizes electrical losses at the cell surface. It delivers module efficiency above 22% and near-zero light-induced degradation (LID). In the JAT54S41 LR series, TOPCon ensures stable power output throughout the module's entire service life - which matters significantly when backed by a 30-year linear power warranty.
What warranty does the JA Solar JAT54S41 LR come with?
The JAT54S41 LR series is backed by a 25-year product warranty covering manufacturing defects and materials, plus a 30-year linear power output warranty. After 30 years, the module is guaranteed to retain at least 87.4% of its rated power. As a Tier 1 manufacturer with a proven track record, JA Solar provides realistic assurance that warranty claims can be enforced over the full declared period.
Is the JAT54S41 LR suitable for installation on a pitched residential roof?
Yes, the JAT54S41 LR series is specifically designed for rooftop installations on both pitched and flat roofs. The monofacial construction simplifies system design and is less sensitive to installation errors than bifacial modules. Up to 480 Wp in a standard 54-cell format is compatible with most racking systems available on the market. The series is also an excellent fit for aesthetically driven All Black installations.
How do JAT54S41 LR modules perform in summer heat when the roof temperature rises?
N-type TOPCon cells have a lower temperature coefficient than older PERC technology - approximately -0.29%/°C for comparable JA Solar models. This means power loss of roughly 2.9% per 10°C temperature rise, versus 3.5-4% typical of p-type cells. When a roof reaches 70°C in summer, this advantage can translate to several hundred additional kWh in the annual energy balance of a real-world system.
Does the All Black design of the JAT54S41 LR reduce its power output?
No. The All Black aesthetic is achieved through a black frame, black backsheet, and black busbars without any modification to the cells themselves. Rated power up to 480 Wp and module efficiency remain identical to the standard version. The only marginal tradeoff is a slightly higher operating temperature due to darker components, which is effectively negligible given the superior thermal characteristics of n-type TOPCon technology.
Does the JAT54S41 LR series perform well on overcast days and in low-irradiance conditions?
Yes - a key advantage of the n-type TOPCon cells in the JAT54S41 LR series is optimized low-irradiance performance. The module harvests diffuse daylight more effectively than PERC technology, which is especially relevant in Central European climates where overcast days are common throughout fall and winter. This results in higher annual energy yields than the nameplate power rating alone would suggest.
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