Skip to main content
JA Solar Brand review

NS-390MH-80

390 Wp Monocrystalline
ComparePV verdict

Middle of its segment, short guarantee

Rank 11,867 of 14,005
Compare panels Datasheet PDF
Power (Wp)
390
Weak · bottom 20%
Efficiency (%)
20.69
Typical · median 21.26%
Density (Wp/m²)
206.9
Typical · median 212.5
Temp (%/°C)
-0.290
Typical · median -0.300
Weight (kg)
20.0
Typical · median 22.3 kg
Warranty (yrs)
25
Weak · bottom 19%

The JA Solar Monocrystalline60 series consists of 60-cell modules, designed to maximize energy production from a limited roof area and to ensure stable operation under real-world conditions. The use of monocrystalline cells in a half-cut configuration helps to minimize losses due to partial shading and improves the uniformity of module performance, resulting in more predictable energy production throughout the day. Thanks to Multi Busbar (MBB) technology, current is collected more effectively from the surface of the cells, and the module is better able to withstand micro-cracks and typical mounting stresses. This solution will be appreciated by installers who prioritize hassle-free installation and low risk of warranty claims.

In practice, Monocrystalline60 also stands out due to its better tolerance to mechanical loads and lower risk of hot spots, which is important for roofs exposed to snow, wind, or local dirt. The series is suitable for residential and commercial installations, where a balance between efficiency, durability, and inverter performance is crucial.

Ranking

6,208 panels in the 290-490 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 20.69% 21.26% Typical 10,976
Power density 206.9 212.5 Typical 10,898
Temperature coefficient -0.290 -0.300 Typical 2,165
Weight per kWp 51.3 53.3 Typical 4,670
Performance warranty 25 yrs 30 yrs Weak · bottom 19% 9,798
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

4 positive · 4 caution
Best for

Residential, commercial and shaded-installations.

Not ideal for

Owners who want a long output guarantee.

Watch-outs
25 year performance warranty

Bottom 19% of the 290-490 W band, against a median of 30 yrs.

What owners get
Highest efficiency among peers

Maximum module efficiency reaches 22.28%, outperforming all listed peer comparables: GCL-M10/54H (21.5%), Phono Solar TWINPLUS (20.98%), and Solarspace SS8-54HSB (21.51%). The 0.77–1.30 percentage-point advantage translates into measurably higher energy yield per unit of roof area.

N-type TOPCon cell technology

N-type TOPCon cells exhibit lower Light Induced Degradation (LID) and better performance at elevated temperatures compared to older PERC cells. In practice this means a higher annual energy yield and a slower power decline over the system's lifetime.

Half-cut cells + Multi Busbar (MBB)

Half-cut cell architecture cuts internal resistance and reduces mismatch losses under partial shading. MBB design increases tolerance to microcracks and installation-induced mechanical stress, directly lowering hot-spot risk and field return rates.

BNEF Tier-1 bankable manufacturer

JA Solar has held continuous BNEF Tier-1 status for over 10 years and ships more than 80 GW annually. Bankable status means lenders accept these modules in non-recourse project financing, providing real assurance that the 25-year power warranty can be enforced.

Trade-offs
Discontinued series (EOL 2023)

The Monocrystalline60 series reached end-of-life in 2023 after an 11-year production run. Availability of new modules, spare parts, and direct OEM service support is limited, increasing operational risk for installations that will be under their 25-year power warranty for another two decades.

Monofacial-only design

No bifacial variant is offered, while the direct peer Solarspace SS8-54HSB (up to 420 Wp, 21.51% efficiency) is available as a bifacial module. In ground-mount and flat-roof installations with a reflective surface, bifacial modules typically deliver 5–12% additional annual yield at no increase in BoS cost.

15-year product warranty — below current standard

The 15-year product warranty falls well short of the benchmark set by current-generation TOPCon modules: Trina Vertex S+, Canadian Solar TOPHiKu6, and JA Deep Blue 4.0 all carry 25-year product warranties and 30-year power warranties. Any mechanical failure after year 15 is borne entirely by the system owner.

Notes from the database
  • At 20.7% efficiency, this panel is 1.1pp below the database median of 21.8%
  • 206.9 W/m² power density is 11.2 W/m² below database median (218.1 W/m²) - requires larger installation area
  • Temperature coefficient of -0.29%/°C matches the database median
  • 20.0 kg weight - 6.5 kg lighter than database median (26.5 kg), reducing installation effort
  • #10976 for efficiency, #2165 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 390 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.69 % Typical Segment median 21.26%
Vmpp · Impp 38.42 V · 10.16 A Operating point at max power
Voc · Isc 44.88 V · 10.86 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1900×992×30 mm · 1.88 m² of roof
Weight 20.0 kg Typical Typical · median 22.3 kg
Cells 70 Monocrystalline
Coefficient Pmax -0.290 %/°C Typical median -0.300 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 19% · 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 390 Wp appear here. The rest cover the whole series.

Additional value from Polycrown Solar's linear warranty Additional value from Polycrown Solar's linear warranty Whole series Current-Voltage Curver Current-Voltage Curver Whole series Power-Voltage Curver Power-Voltage Curver Whole series Voltage current curve at different temperatures Voltage current curve at different temperatures 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 -0.300
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
JA Solar NS-390MH-80 390 W 20.69% -0.290 20.0 kg You are here
LX-440M/182-108+GG 440 W 23.07% -0.240 23.6 kg +50 W, +2.4 pp, +5 yr warranty
GKA210M340W 340 W 23.00% - 16.2 kg -50 W, +2.3 pp, +5 yr warranty
GKA210M360W 360 W 23.00% - 16.2 kg Lighter, +2.3 pp, +5 yr warranty
GKA210M380W (1/4*4*38) 380 W 23.00% - 17.1 kg Lighter, +2.3 pp, +5 yr warranty
GKA210M400W (1/2*4*20) 400 W 23.00% - 18.0 kg Lighter, +2.3 pp, +5 yr warranty
GKA210M400W (1/4*4*40) 400 W 23.00% - 18.0 kg Lighter, +2.3 pp, +5 yr warranty
GKA210M380W (1/2*4*19) 380 W 23.00% - 17.1 kg Lighter, +2.3 pp, +5 yr warranty
JT440SYK(B) 440 W 22.90% -0.240 23.0 kg +50 W, +2.2 pp, +5 yr warranty
NS-380MH-80 380 W 20.16% -0.290 20.0 kg -10 W, -0.5 pp
NS-400MH-80 400 W 21.22% -0.290 20.0 kg +10 W, +0.5 pp
NS-410MH-80 410 W 21.75% -0.290 20.0 kg +20 W, +1.1 pp
NS-420MH-80 420 W 22.28% -0.290 20.0 kg +30 W, +1.6 pp
SPR-MAX7-475 475 W 24.00% -0.270 21.1 kg +85 W, +3.3 pp, +15 yr warranty
SPR-MAX7-470 470 W 23.70% -0.270 21.1 kg +80 W, +3.0 pp, +15 yr warranty
SPR-MAX7-465 465 W 23.50% -0.270 21.1 kg +75 W, +2.8 pp, +15 yr warranty
SPR-MAX6-440 440 W 22.80% -0.290 20.9 kg +50 W, +2.1 pp, +15 yr warranty

Found 10 panels of the same or similar size to this one, within ±10 mm. See them here Found 10 panels of the same or similar size to this one, within ±25 mm. See them here Found 106 panels of the same or similar size to this one, within ±50 mm. See them here Found 440 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
Is the JA Solar Monocrystalline60 series still available?
The JA Solar Monocrystalline60 series has been discontinued and is no longer in active production. Availability depends entirely on distributor stock levels. If you need comparable specs, ask your supplier about a current JA Solar replacement built on the same TOPCon cell technology.
What is TOPCon technology and why was it used in the Monocrystalline60 series?
TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell technology that reduces recombination losses at contact interfaces and improves module efficiency. In the Monocrystalline60 series, it enables a peak output of up to 420 Wp within a compact 60-cell format and delivers lower annual degradation compared to conventional PERC cells, translating into more energy yield over a 20–25 year lifespan.
What warranty does the JA Solar Monocrystalline60 come with?
JA Solar provides a 15-year product warranty and a 25-year linear power output warranty for the Monocrystalline60 series. The power warranty guarantees that output stays above JA Solar's specified minimum threshold for a full quarter-century, giving residential and commercial system owners solid financial protection across the entire operational lifespan.
Do the half-cut cells and MBB technology in the Monocrystalline60 really help with partial shading?
Yes. Half-cut cells split the module into two independently operating sections, so shading one half does not completely block production in the other. Multi Busbar (MBB) technology shortens the current path to the busbars, reducing resistive losses. The combined benefit is most noticeable on roofs with chimneys, dormers, or structures that cast partial shadows throughout the day.
How many 420 Wp JA Solar Monocrystalline60 panels do I need for a single-family home?
A single 420 Wp panel generates roughly 380–470 kWh per year depending on location and roof pitch. A household consuming 3,500–4,500 kWh annually typically needs 8–12 modules. The compact 60-cell format makes it easier to fit the required number of panels on smaller roof sections without sacrificing target system output.
How well do JA Solar Monocrystalline60 panels handle snow and wind loads?
The Monocrystalline60 series features enhanced mechanical load tolerance, which matters in climates with seasonal snowfall and strong winds. The half-cut cell layout also lowers hot-spot risk, reducing thermal stress under demanding conditions. Before installation, check the datasheet for the rated static and dynamic load capacity in Pa applicable to your specific region.
Add to compare