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Sharp Brand review

NU-JC420B

420 Wp TOPCon
ComparePV verdict

Middle of its segment, short guarantee

Rank 9,501 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)
20.7
Typical · median 22.0 kg
Warranty (yrs)
25
Weak · bottom 7%

The Sharp NU-JC series are modules designed for high efficiency, even under less-than-ideal conditions. The use of half-cut monocrystalline cells minimizes internal losses and helps maintain stable performance even with partial shading, which in practice translates to better energy yield from the same surface area. You may also find PERC or N-type TOPCon technology in selected variants, which allows the modules to better utilize diffuse light and maintain their parameters over time.

The positive power tolerance is also noteworthy, which reduces the risk of underestimating the performance of the installation in real-world conditions. The series is designed for long-term reliability, as evidenced by, among other things, high hail resistance and a focus on dependability over the long term.

It is a good choice for residential and small commercial installations, where predictable performance, aesthetics (available black versions), and greater tolerance for difficult mounting conditions are important.

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 49.3 51.5 Typical 2,847
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

0 positive · 3 caution
Best for

Residential, commercial and shaded-installations.

Not ideal for

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

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%.

Notes from the database
  • Efficiency of 21.5% matches the TOPCon 400-450W median
  • 215.1 W/m² power density is 5.1 W/m² below TOPCon 400-450W median (220.2 W/m²) - requires larger installation area
  • Temperature coefficient of -0.30%/°C matches the TOPCon 400-450W median
  • At 20.7 kg, this panel is 1.3 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 32.34 V · 12.99 A Operating point at max power
Voc · Isc 38.63 V · 13.86 A Sizes the string length
Max system voltage 1000 V Longer strings than 1000 V modules
Dimensions 1722×1134×30 mm · 1.95 m² of roof
Weight 20.7 kg Typical Typical · median 22.0 kg
Cells 108 · TOPCon Monocrystalline
Coefficient Pmax -0.300 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.259 · 0.046 %/°C
Product warranty 25 years Hardware defects only
Performance warranty 25 years Weak bottom 7% · median 30 yrs

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
Sharp NU-JC420B 420 W 21.51% -0.300 20.7 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
NU-JC410 410 W 21.00% -0.341 21.8 kg Hotter, heavier, -0.5 pp
NU-JC415 415 W 21.25% -0.341 20.7 kg Hotter, -0.3 pp
NU-JC435 435 W 22.28% -0.300 20.7 kg +15 W, +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, +3.2 pp, +5 yr warranty
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +70 W, +3.0 pp, +5 yr warranty
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +80 W, cooler, +3.0 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +80 W, +3.0 pp, +5 yr warranty

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 NU-JC Series series

6 answered

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

Is the Sharp NU-JC Series still available for purchase?
The Sharp NU-JC Series has been discontinued. Sharp closed its European solar module sales division in March 2025, so no new stock is being supplied directly from the manufacturer. Any remaining availability is limited to distributor inventory. Before purchasing, confirm current stock levels and warranty service conditions directly with your supplier.
What is TOPCon cell technology used in Sharp NU-JC panels and why does it matter?
TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell technology in which a thin tunnel oxide layer passivates the contacts and significantly reduces charge carrier recombination. In practice, this translates to higher cell efficiency (up to 22.28% in the NU-JC Series), better performance under diffuse light on overcast days, and slower long-term power degradation compared to older PERC cells.
What warranty is included with Sharp NU-JC solar panels?
Sharp offers a 25-year product warranty and a 25-year linear power output warranty. The positive power tolerance further reduces the risk of a module delivering less energy than the system design assumes. Since Sharp has exited the European market, we recommend confirming warranty claim procedures in writing with your distributor before purchasing remaining stock.
Do Sharp NU-JC panels handle partial shading from a chimney or dormer well?
Yes, the half-cut cell layout significantly improves shade tolerance. Each cell is split in two, so shading one section of the module does not block the output of the remaining sections. The N-type TOPCon technology also boosts performance under diffuse irradiance, resulting in better energy yields during overcast days or at low sun angles typical of northern European climates.
Is there an all-black or black-frame version of the Sharp NU-JC Series?
Yes, Sharp offered black-frame variants within the NU-JC Series, including the full-black NU-JC430B model. This is a solid choice for homeowners who value installation aesthetics, as the panels blend in with dark roof tiles without the contrast of a silver frame. Since the series is discontinued, confirm the specific color variant's availability with your distributor before ordering.
What is the peak power output of a Sharp NU-JC panel and how many do I need for a typical home?
The flagship model in the series reaches a peak power output of 435 Wp at approximately 22.28% efficiency. For a typical home consuming 4,000-5,000 kWh per year, around 9-12 panels are usually sufficient, resulting in a system size of roughly 3.9-5.2 kWp. The high per-panel wattage is especially useful on roofs with limited usable area, since the same energy target is met with fewer modules.
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