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JA Solar NS-440MH-144
JA Solar Brand review

NS-440MH-144

440 Wp TOPCon
ComparePV verdict

Middle of its segment, modest efficiency

Rank 11,369 of 14,129
Compare panels Datasheet PDF
Power (Wp)
440
Typical for its class
Efficiency (%)
20.18
Weak · bottom 2%
Density (Wp/m²)
201.8
Weak · bottom 2%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
24.0
Typical · median 22.0 kg
Warranty (yrs)
25
Weak · bottom 7%

The JA Solar Monocrystalline 144 series consists of modules based on a 144-cell configuration in a half-cut design, specifically engineered to function reliably even under less-than-ideal roof conditions. The use of PERC monocrystalline cells and MBB multi-shed architecture improves power generation and reduces losses, resulting in more predictable annual energy production. A key advantage is reduced sensitivity to partial shading - the half-cut design helps maintain performance when shadows from chimneys, antennas, or neighboring buildings "cut through" a portion of the module. The half-cut design also minimizes the risk of hot spots, and the enhanced mechanical strength increases safety under wind and snow loads. This makes it a good choice for residential and commercial installations, especially on roofs with many orientations, where high power density and reliability are paramount, without compromising on performance compared to competitors.

Ranking

1,220 panels in the segment TOPCon 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 20.18% 22.00% Weak · bottom 2% 12,140
Power density 201.8 220.2 Weak · bottom 2% 12,088
Temperature coefficient -0.290 -0.290 Typical 2,220
Weight per kWp 54.5 51.5 Typical 8,953
Performance warranty 25 yrs 30 yrs Weak · bottom 7% 9,912
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

4 positive · 5 caution
Best for

Residential, commercial, utility-scale and shaded-installations.

Not ideal for

Tight roof space, roofs where every square metre has to count and owners who want a long output guarantee.

Watch-outs
20.18% module efficiency

Bottom 2% of the TOPCon 400-450 W segment, against a median of 22.00%. Ranked 12,140th in the whole database.

201.8 watts per square metre

Bottom 2% of the TOPCon 400-450 W segment, against a median of 220.2. Ranked 12,088th in the whole database.

25 year performance warranty

Bottom 7% of the TOPCon 400-450 W segment, against a median of 30 yrs. Ranked 9,912th in the whole database.

What owners get
N-type TOPCon cell technology

N-type silicon eliminates LID/LeTID (no boron-oxygen complex due to phosphorus doping), ensuring stable output from day one. The guaranteed degradation rate of ~0.40%/yr is significantly lower than the ~0.55%/yr typical of P-type PERC, resulting in measurably higher cumulative energy yield across the 25-year linear power warranty.

Up to 22.63% efficiency - top-tier segment

Peak module efficiency of 22.63% (585 Wp variant) is on par with the best peer comparables in the 144-cell TOPCon segment: Hanersun Hitouch 5N (22.65%), Risen RSM144-9 (22.60%), and Q-SUN Qrystal N8 (22.65%). The series ranks in the top 10% of the segment with no meaningful efficiency disadvantage.

BNEF Tier-1 bankable status (Q1 2026)

JA Solar holds a continuous BNEF Tier-1 designation (March 2026 methodology), making its modules eligible for non-recourse project finance by international banks. With over 80 GW of annual production capacity and operations since 2005, counterparty risk over the 25-year power warranty period is minimal.

9 variants from 430-585 Wp with half-cut MBB architecture

A broad power range across 9 SKUs covers applications from small residential rooftops to C&I installations without overloading MPPT inputs. The half-cut 144-cell layout with multi-busbar (MBB) architecture shortens current paths, reduces resistive losses, and lowers hot-spot risk under partial shading conditions.

Trade-offs
Only 15-year product warranty

The 2024-2026 market standard for N-type TOPCon modules is a 25-year product warranty, offered by Jinko Tiger Neo, LONGi Hi-MO 6, and JA Solar's own flagship DeepBlue 4.0 Pro (25-year product + 30-year performance). The Monocrystalline 144 series' 15-year product coverage is a disadvantage in competitive tenders and bank due diligence evaluations.

Monofacial only - no bifacial rear-side gain

Direct peer comparable Risen RSM144-9-560-585BNDG is a bifacial N-type TOPCon dual-glass module capable of generating an additional 5-15% energy from reflected irradiance at suitable albedo conditions. The JA Solar Monocrystalline 144 (is_bifacial: false) does not offer this option, reducing its competitiveness for ground-mount and flat-roof installations with reflective surfaces.

Notes from the database
  • Efficiency of 20.2% is 1.8pp below the TOPCon 400-450W median (22.0%)
  • Power density of 201.8 W/m² is 18.3 W/m² below TOPCon 400-450W median (220.2 W/m²) - needs more roof space
  • At -0.29%/°C, hot weather performance is typical for TOPCon 400-450W panels
  • At 24.0 kg (2.0 kg above TOPCon 400-450W median of 22.0 kg), requires checking roof load capacity
  • In the top 86% for efficiency among all TOPCon panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 440 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.18 % Weak Segment median 22.00%
Vmpp · Impp 41.51 V · 10.60 A Operating point at max power
Voc · Isc 49.18 V · 11.47 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2096×1040×30 mm · 2.18 m² of roof
Weight 24.0 kg Typical Typical · median 22.0 kg
Cells 144 · TOPCon Monocrystalline
Coefficient Pmax -0.290 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.250 · 0.045 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 15 years Hardware defects only
Performance warranty 25 years Weak bottom 7% · median 30 yrs

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 440 Wp appear here. The rest cover the whole series.

25 years power warranty 25 years power warranty Whole series Voltage current curve at different temperatures Voltage current curve at different temperatures Whole series Power-Voltage Curver Power-Voltage Curver 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
-0.290 %/°C against a segment median of -0.290
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
JA Solar NS-440MH-144 440 W 20.18% -0.290 24.0 kg You are here
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +50 W, +4.3 pp, +5 yr warranty
STP-NT11/48QGSF-490 490 W 24.50% -0.260 21.5 kg +50 W, +4.3 pp, +5 yr warranty
JAT54S40-485/LR 485 W 24.30% -0.260 19.3 kg Lighter, +4.1 pp, +5 yr warranty
AIKO-A485-MCE54Mw 485 W 24.30% -0.260 21.0 kg +45 W, +4.1 pp, +5 yr warranty
AIKO-A485-MAH54Mw 485 W 24.30% -0.260 21.5 kg +45 W, +4.1 pp, +5 yr warranty
GK-5-54HG-485M 485 W 24.30% -0.260 21.0 kg +45 W, +4.1 pp, +5 yr warranty
ZEUS 3.0+ 108 485WP 485 W 24.30% -0.260 24.2 kg +45 W, +4.1 pp, +5 yr warranty
NS-430MH-144 430 W 19.72% -0.290 24.0 kg -10 W, -0.5 pp
NS-450MH-144 450 W 20.64% -0.290 24.0 kg +10 W, +0.5 pp
NS-460MH-144 460 W 21.10% -0.290 24.0 kg +20 W, +0.9 pp
GKA120N-PRO-590W 590 W 23.82% -0.300 26.7 kg +150 W, +3.6 pp, +5 yr warranty
GKA120N-PRO-585W 585 W 23.62% -0.300 26.7 kg +145 W, +3.4 pp, +5 yr warranty
BGO 580 580 W 23.50% -0.290 26.0 kg +140 W, +3.3 pp, +5 yr warranty
GKA120N-PRO-580W 580 W 23.42% -0.300 26.7 kg +140 W, +3.2 pp, +5 yr warranty

Found 234 panels of the same or similar size to this one, within ±10 mm. See them here Found 325 panels of the same or similar size to this one, within ±25 mm. See them here Found 352 panels of the same or similar size to this one, within ±50 mm. See them here Found 1082 panels of the same or similar size to this one, within ±100 mm. See them here

About the Monocrystalline 144 series

6 answered

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

What warranty does the JA Solar Monocrystalline 144 series come with?
The JA Solar Monocrystalline 144 series includes a 15-year product warranty and a 25-year linear power output warranty. The manufacturer guarantees a defined minimum power yield for a quarter century, which is a key figure when calculating the return on investment for a residential or commercial solar installation.
How does the JA Solar Monocrystalline 144 handle partial shading from a chimney or antenna?
The half-cut cell design splits each cell in two, so shade from a chimney, antenna, or neighboring building affects only a portion of the module without shutting down the remaining section. This results in higher annual energy yield compared to conventional full-cell panels, especially on multi-slope roofs with multiple obstructions.
What is TOPCon technology used in this series and is it worth the premium?
TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell technology that minimizes carrier recombination at the silicon surface, achieving higher efficiency than older PERC cells. In practice, TOPCon modules perform better under overcast and diffuse-light conditions, carry a lower temperature coefficient, and degrade more slowly over time - meaningfully increasing energy yield across the full warranty period.
Is the JA Solar Monocrystalline 144 a bifacial panel?
No, the JA Solar Monocrystalline 144 in this configuration is not a bifacial module. It collects energy from the front side only. This suits standard rooftop installations where the rear surface has no meaningful exposure to reflected irradiance, and where the priority is a reliable 585 Wp rated output and straightforward integration with common racking systems.
Is JA Solar a reliable manufacturer, and will they honor warranties 15 years from now?
JA Solar is a Chinese manufacturer headquartered in Beijing, active in the solar industry since 2005 and consistently ranked as a Tier 1 supplier by independent agencies including Bloomberg NEF. Tier 1 status reflects documented financial stability and the capacity to fulfill long-term warranty obligations - directly relevant when relying on a 25-year power guarantee.
How many JA Solar Monocrystalline 144 panels rated at 585 Wp do I need for a 5-6 kWp home system?
At 585 Wp per module, just 9-11 panels are enough to build a 5-6 kWp system. The high per-panel wattage means fewer modules and a smaller roof footprint compared to lower-wattage alternatives - a key advantage when available roof area is limited or partially obstructed.
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