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Phono Solar Brand review

NS-420MH-108

420 Wp N-type
ComparePV verdict

Light for its output, short guarantee

Rank 11,079 of 14,005
Compare panels Datasheet PDF
Power (Wp)
420
Weak · bottom 20%
Efficiency (%)
21.01
Weak · bottom 12%
Density (Wp/m²)
210.2
Weak · bottom 13%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
20.0
Strong · 2.0 kg below median
Warranty (yrs)
25
Weak · bottom 11%

The Phono Solar Monocrystalline 108 series is designed for high energy production while maintaining a compact module format. The use of a 108 half-cut monocrystalline cell array minimizes losses in the conductors and improves performance under partial shading - which translates directly into more stable yields in urban environments, on roofs with chimneys, or during intermittent shading. Depending on the variant, you may also find N-type TOPCon technology, which helps to reduce degradation and supports higher efficiency over the long term. The modules are designed for demanding conditions thanks to an IP68 sealed junction box and robust construction, making them suitable for both residential and commercial installations. In practice, Monocrystalline 108 stands out for its combination of modern cell architecture with a focus on reliability and predictable performance - without compromising on installation. This is a good choice for investors who expect good performance in low light conditions and resistance to typical operating problems.

Ranking

321 panels in the segment N-type 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.01% 21.91% Weak · bottom 12% 9,744
Power density 210.2 218.3 Weak · bottom 13% 9,728
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 47.6 51.2 Strong · top 14% 1,771
Performance warranty 25 yrs 30 yrs Weak · bottom 11% 9,798
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

6 positive · 5 caution
Best for

Residential, commercial and shaded-installations.

Not ideal for

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

Strengths
47.6 kg per kWp

Top 14% of the N-type 400-450 W segment, against a median of 51.2.

Watch-outs
25 year performance warranty

Bottom 11% of the N-type 400-450 W segment, against a median of 30 yrs.

21.01% module efficiency

Bottom 12% of the N-type 400-450 W segment, against a median of 21.91%.

210.2 watts per square metre

Bottom 13% of the N-type 400-450 W segment, against a median of 218.3.

What owners get
108 half-cut N-type TOPCon cells

The 108 monocrystalline half-cut cell layout combined with N-type TOPCon technology reduces resistive losses and improves partial-shading performance (chimneys, parapets), delivering more predictable yields in urban rooftop installations.

Segment-leading efficiency

Peak efficiency of 23.02% matches the best comparable model in the segment (SunKean SKT440~460M12-96D4, 23.02%) and outperforms the Axitec AXIbiperfect GR WB (22.54%) at the same 460 Wp maximum power.

9 consecutive years on BNEF Tier 1

Phono Solar has been continuously listed on the Bloomberg NEF Tier 1 list for nine years, confirming financial stability and bankability - a key factor for financing commercial-scale projects.

IP68-rated junction box

The IP68-rated junction box provides resistance to moisture and dust ingress, which matters for installations exposed to harsher weather conditions, such as roof-mounted arrays subject to driving rain.

Established manufacturer since 2004, still in production

Phono Solar has operated since 2004, and the Monocrystalline108 series (released 2021) is not discontinued, meaning continued availability of service and replacement parts.

Trade-offs
Warranty below current N-type standard

The 15-year product warranty and 25-year power warranty are shorter than those of direct N-type TOPCon competitors - for example, DMEGC's INFINITY RT offers a 25-year product warranty and a 30-year power warranty with minimum 87.4% retention after 30 years. This is a meaningful gap when comparing total lifecycle cost (LCOE).

No bifacial variant available

The series is monofacial only (is_bifacial: false), while the comparable Axitec AXIbiperfect GR WB at the same 460 Wp power offers bifacial technology, allowing that competitor to capture additional rear-side energy gain, e.g. on bright surfaces or elevated ground-mount structures.

Notes from the database
  • Efficiency of 21.0% is 0.9pp below the N-type 400-450W median (21.9%)
  • 210.2 W/m² power density is 8.1 W/m² below N-type 400-450W median (218.3 W/m²) - requires larger installation area
  • Temperature coefficient of -0.29%/°C matches the N-type 400-450W median
  • 20.0 kg weight - 2.0 kg lighter than N-type 400-450W median (22.0 kg), reducing installation effort
  • #9744 for efficiency, #2165 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 420 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.01 % Weak Segment median 21.91%
Vmpp · Impp 32.84 V · 12.79 A Operating point at max power
Voc · Isc 39.23 V · 13.55 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 20.0 kg Strong Strong · 2.0 kg below median
Cells 108 · N-type 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 11% · median 30 yrs

Datasheet charts

Open datasheet PDF

Measured curves published by Phono 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.

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 -0.290
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Phono Solar NS-420MH-108 420 W 21.01% -0.290 20.0 kg You are here
JST-EDMH-(445-465)W-TD (465W class) 465 W 23.81% -0.300 20.5 kg +45 W, +2.8 pp, +5 yr warranty
LX-465M/182R-96+ GG 465 W 23.80% -0.260 23.5 kg +45 W, +2.8 pp, +5 yr warranty
SPR-MAX7-470 470 W 23.70% -0.270 21.1 kg +50 W, +2.7 pp, +15 yr warranty
AIKO-A470-MAH54Mb 470 W 23.60% -0.260 21.5 kg +50 W, +2.6 pp, +5 yr warranty
AIKO-A460-MAH54Mb 460 W 23.60% -0.290 20.5 kg +40 W, +2.6 pp, +5 yr warranty
HSM-BD54-LA470 470 W 23.60% -0.260 21.5 kg +50 W, +2.6 pp, +5 yr warranty
NS-430MH-108 430 W 21.52% -0.290 20.0 kg +10 W, +0.5 pp
PS440L8H-16/QMH 440 W 22.02% -0.290 13.7 kg +20 W, lighter, +1.0 pp
PS445L8-16/QMH 445 W 22.27% -0.290 13.7 kg +25 W, lighter, +1.3 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +90 W, +4.0 pp, +5 yr warranty
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +75 W, +3.8 pp, +5 yr warranty
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +85 W, +3.7 pp, +5 yr warranty
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +70 W, +3.5 pp, +5 yr warranty
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +80 W, +3.5 pp, +5 yr warranty
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +80 W, +3.5 pp, +5 yr warranty

Found 1395 panels of the same or similar size to this one, within ±10 mm. See them here Found 1425 panels of the same or similar size to this one, within ±25 mm. See them here Found 3614 panels of the same or similar size to this one, within ±50 mm. See them here Found 3962 panels of the same or similar size to this one, within ±100 mm. See them here

About the Monocrystalline108 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 Phono Solar Monocrystalline108 series come with?
The Phono Solar Monocrystalline108 series carries a 15-year product warranty covering material and manufacturing defects, plus a 25-year linear power output warranty. Phono Solar is a Tier 1 manufacturer with independently verified financial and production reliability. The extended power warranty timeline is a key factor when calculating the return on investment for a photovoltaic system.
Does the Phono Solar Monocrystalline108 handle partial roof shading well?
Yes. The Monocrystalline108 series uses a 108 half-cut cell layout, physically splitting each cell into two halves. This reduces current through each half-cell, limiting resistive losses and improving module output under partial shading from chimneys, antennas, or adjacent buildings. This is a meaningful advantage for urban rooftop installations where completely unobstructed roof planes are uncommon.
What is N-type TOPCon technology and what does it change in the Monocrystalline108 series?
N-type TOPCon uses an N-type silicon base with a thin tunnel oxide passivation layer on the rear side, reducing electron recombination. In practice this delivers a lower temperature coefficient, reduced light-induced degradation (LID) in the first years of operation, and higher module efficiency over the long term. In the Monocrystalline108 series, N-type TOPCon supports more predictable energy yield throughout the full warranty period.
What is the maximum power output of a Phono Solar Monocrystalline108 panel?
The maximum power output in the Phono Solar Monocrystalline108 series reaches 460 Wp. The series includes variants at different wattage levels - the right choice depends on available roof area and the target system capacity. The high per-module wattage in a compact 108-cell format means you can reach your desired system size with fewer modules, simplifying layout on constrained roof geometries.
Are Phono Solar Monocrystalline108 panels suitable for a residential pitched-roof installation?
Yes, the Monocrystalline108 series is well suited for a typical residential prosumer installation on a pitched roof. The IP68-rated junction box ensures weatherproofing under heavy rain and moisture condensation. The robust aluminum frame simplifies mounting on standard racking rails, and the half-cut cell layout combined with strong low-light performance is an added benefit on roofs with multiple facets or obstructions.
How does the Monocrystalline108 series perform in overcast conditions and low irradiance?
The Phono Solar Monocrystalline108 series is engineered for strong performance in low-light conditions, which is especially relevant in climates with variable solar irradiance. N-type TOPCon cells outperform older P-type PERC cells at low diffuse irradiance levels, and the half-cut layout minimizes losses from uneven shading across the module. In practice, this translates to higher energy yield on cloudy days and more consistent annual production figures.
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