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Jinko Solar Brand review

JS420N108FB

420 Wp TOPCon
ComparePV verdict

Light for its output, short guarantee

Rank 12,345 of 14,129
Compare panels Datasheet PDF
Power (Wp)
420
Weak · bottom 16%
Efficiency (%)
21.51
Weak · bottom 20%
Density (Wp/m²)
215.1
Weak · bottom 18%
Temp (%/°C)
-0.300
Typical · median -0.290
Weight (kg)
19.0
Strong · 3.0 kg below median
Warranty (yrs)
25
Weak · bottom 7%

The Jinko Solar JS-N-TOPCon series is designed for maximum stable energy production under real-world conditions, where not only the power specified in the catalog matters, but also the predictability of annual energy yield. The use of N-type TOPCon cells helps to minimize losses due to charge recombination, which translates into better performance even under weaker sunlight and higher temperatures. The module design utilizes multi-busbar technology, which improves current collection and enhances resistance to microcracks, which are important during transport and long-term operation. In practice, this series solves a common problem for investors - performance degradation over time - by focusing on high durability and low degradation. An additional advantage is the potential for dual-sided (bifacial) operation in installations where the surface reflects light. The JS-N-TOPCon series is suitable for homes, businesses, and commercial projects, especially where cost-effectiveness is important with limited roof or ground space.

Ranking

1,220 panels in the segment TOPCon 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.51% 22.00% Weak · bottom 20% 7,958
Power density 215.1 220.2 Weak · bottom 18% 7,946
Temperature coefficient -0.300 -0.290 Typical 6,152
Weight per kWp 45.2 51.5 Strong · top 4% 655
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

6 positive · 4 caution
Best for

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

Not ideal for

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

Strengths
45.2 kg per kWp

Top 4% of the TOPCon 400-450 W segment, against a median of 51.5. Ranked 655th in the whole database.

Watch-outs
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.

215.1 watts per square metre

Bottom 18% of the TOPCon 400-450 W segment, against a median of 220.2.

21.51% module efficiency

Bottom 20% of the TOPCon 400-450 W segment, against a median of 22.00%.

What owners get
N-type TOPCon - ultra-low LID/LeTID degradation

N-type cells exhibit LID of only 0.26% (vs. 1.92% for PERC) and LeTID of 0.09% (vs. 1.17% for P-type), independently validated by TÜV NORD. A linear degradation rate of 0.4%/year ensures >90% initial power after 25 years, translating into a materially higher cumulative energy yield over the module's full service life.

#1 BNEF Bankability - 10th consecutive year

JinkoSolar is the only PV module manufacturer to achieve a 100% bankability score in the Bloomberg NEF 2025 report - for the tenth consecutive year. This provides the highest confidence in 25-year power warranty fulfillment, which is critical for bank- and fund-financed infrastructure projects.

Efficiency up to 22.45% - top of segment

Peak efficiency of 22.45% places the series at par with the best direct competitors: EGing PV STAR Pro (22.45%) and Emmvee Titanium Duo (22.45%), and above ZNShine ZXM7-UHLD144 (22.44%). On the same roof area, this enables higher installed capacity compared to average PERC modules rated at 20-21%.

Low temperature coefficient of -0.30%/°C

TOPCon technology delivers a temperature coefficient of -0.30%/°C versus a typical -0.35%/°C for PERC modules. On a rooftop heated to 65°C (ΔT=40°C), this translates to approximately 2% higher instantaneous output compared to P-type predecessors - a meaningful gain aggregated over warm-season generation.

Multi-busbar technology - microcrack resistance

Multi-busbar (MBB) cell interconnection shortens current paths, reduces resistive losses, and improves resistance to microcracks caused by mechanical stress during shipping and thermal cycling over years of operation. This supports sustained reliability throughout the full 25-year warranty period.

Trade-offs
Monofacial-only configuration

The JS-N-TOPCon series is not available in a bifacial variant, whereas the directly comparable Emmvee Titanium Duo (bifacial glass-glass, 580 Wp, 22.45%) captures an additional 5-30% energy from albedo in ground-mount or light-membrane roof installations. In such sites, foregoing the bifacial gain represents a measurable reduction in annual energy yield at equivalent cell efficiency.

Notes from the database
  • Efficiency of 21.5% matches the TOPCon 400-450W median
  • At 215.1 W/m², this panel generates 5.1 W/m² less per unit area than TOPCon 400-450W median (220.2 W/m²)
  • At -0.30%/°C, hot weather performance is typical for TOPCon 400-450W panels
  • At 19.0 kg, this panel is 3.0 kg lighter than TOPCon 400-450W median (22.0 kg) - easier handling during installation
  • Ranked #7958 out of 14129 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 420 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.51 % Weak Segment median 22.00%
Vmpp · Impp 31.90 V · 13.17 A Operating point at max power
Voc · Isc 38.50 V · 13.83 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1722×1134×30 mm · 1.95 m² of roof
Weight 19.0 kg Strong Strong · 3.0 kg below median
Cells 108 · TOPCon Monocrystalline
Coefficient Pmax -0.300 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.250 · 0.046 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Performance warranty 25 years Weak bottom 7% · median 30 yrs
End-of-warranty output 84.8 % Equals 345 W guaranteed
Degradation 2.00 % First year

Datasheet charts

Open datasheet PDF

Measured curves published by Jinko Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 420 Wp appear here. The rest cover the whole series.

JS Solar's performance Warranty JS Solar's performance Warranty Whole series I-V Curve I-V Curve 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
-0.300 %/°C against a segment median of -0.290
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Jinko Solar JS420N108FB 420 W 21.51% -0.300 19.0 kg You are here
JST-EDMH-(445-465)W-TD (465W class) 465 W 23.81% -0.300 20.5 kg +45 W, +2.3 pp, +5 yr warranty
LX-465M/182R-96+ GG 465 W 23.80% -0.260 23.5 kg +45 W, +2.3 pp, +5 yr warranty
SPR-MAX7-470 470 W 23.70% -0.270 21.1 kg +50 W, +2.2 pp, +15 yr warranty
AIKO-A470-MAH54Mb 470 W 23.60% -0.260 21.5 kg +50 W, +2.1 pp, +5 yr warranty
AIKO-A460-MAH54Mb 460 W 23.60% -0.290 20.5 kg +40 W, +2.1 pp, +5 yr warranty
HSM-BD54-LA470 470 W 23.60% -0.260 21.5 kg +50 W, +2.1 pp, +5 yr warranty
JS182MHC108-390 390 W 20.00% -0.340 21.5 kg -30 W, hotter, -1.5 pp
JKM395M-54HL4-V 395 W 20.23% -0.350 22.0 kg Hotter, heavier, -1.3 pp
JS182MHC108-395 395 W 20.20% -0.340 21.5 kg -25 W, hotter, -1.3 pp
JKM400M-54HL4-V 400 W 20.48% -0.350 22.0 kg Hotter, heavier, -1.0 pp
JS182MHC108-400 400 W 20.50% -0.340 21.5 kg Hotter, heavier, -1.0 pp
JKM405M-54HL4-V 405 W 20.74% -0.350 22.0 kg Hotter, heavier, -0.8 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +90 W, cooler, +3.5 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +75 W, +3.3 pp, +5 yr warranty
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +85 W, cooler, +3.2 pp
WST-505BKX54-A2 505 W 24.70% -0.260 25.0 kg +85 W, heavier, +3.2 pp

Found 1797 panels of the same or similar size to this one, within ±10 mm. See them here Found 1928 panels of the same or similar size to this one, within ±25 mm. See them here Found 3413 panels of the same or similar size to this one, within ±50 mm. See them here Found 4007 panels of the same or similar size to this one, within ±100 mm. See them here

About the JS-N-TOPCon Series series

6 answered

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

What is the power warranty on Jinko Solar JS-N-TOPCon panels and how fast do they degrade?
The JS-N-TOPCon series comes with a 25-year linear power output warranty, guaranteeing a minimum yield throughout the entire period. Thanks to N-type TOPCon cells, annual degradation is only about 0.4% after the first year (first-year degradation approx. 1%), well below older PERC modules at ~0.55%/year. In real-world terms, this translates into meaningfully higher energy revenues over a 20-25 year system lifetime.
How does TOPCon technology differ from PERC, and why does the JS-N-TOPCon series offer higher efficiency?
PERC cells use a rear passivation layer to reduce charge recombination. TOPCon takes this further by adding an ultra-thin tunnel oxide layer and doped polysilicon on the rear side, drastically cutting recombination losses. In practice, JS-N-TOPCon modules exceed 22% efficiency, produce more energy under low irradiance, and handle elevated temperatures better - the temperature coefficient is approximately -0.29%/°C versus ~-0.35%/°C for a typical PERC module.
Are Jinko Solar JS-N-TOPCon 580 W panels a good fit for a small roof with limited space?
Yes - that is one of the key strengths of this series. With up to 580 W per module, you can reach your target system capacity with fewer panels, which is critical when roof space is limited or partially shaded. Fewer modules also mean lower balance-of-system (BoS) costs for mounting hardware and wiring. The series suits residential installations from 5-10 kW as well as larger commercial projects.
How do JS-N-TOPCon panels perform in winter and under the overcast conditions typical of Central Europe?
N-type TOPCon cells carry a lower temperature coefficient (-0.29%/°C) than standard PERC modules, which limits summer losses but also improves cold-weather output. More relevant for cloudy climates is the series' enhanced low-irradiance performance, which boosts energy harvest on overcast days. In annual yield simulations, this advantage over older technologies can be significant in regions with a high share of diffuse radiation.
Is the Jinko Solar JS-N-TOPCon series a bifacial module?
No. In this configuration, the JS-N-TOPCon is a monofacial module that generates power from the front surface only. It therefore requires no reflective ground surface or elevated racking to capture rear-side irradiance. This simplifies installation and system design on typical tiled or metal roofs, where any bifacial gain would in any case be negligible.
Is Jinko Solar a reliable manufacturer, and is the JS-N-TOPCon series still available?
Jinko Solar holds Bloomberg NEF Tier 1 status, has been in the market for over 15 years, and consistently ranks among the top global PV module suppliers by shipment volume and quality. The JS-N-TOPCon series is active and currently available for purchase. As a Tier 1 manufacturer, Jinko provides the financial stability necessary to back a 25-year power output warranty - an important consideration when evaluating long-term investment risk.
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