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Phono Solar PS400M4-22/WH
Phono Solar Brand review

PS400M4-22/WH

400 Wp PERC
ComparePV verdict

Middle of its segment, modest efficiency

Rank 12,419 of 14,129
Compare panels Datasheet PDF
Power (Wp)
400
Weak · bottom 9%
Efficiency (%)
19.98
Weak · bottom 12%
Density (Wp/m²)
199.8
Weak · bottom 12%
Temp (%/°C)
-0.350
Typical · median -0.350
Weight (kg)
23.0
Weak · 1.0 kg above median
Warranty (yrs)
25
Typical · median 25 yrs

Phono Solar TwinPlus photovoltaic panels are based on an innovative half-cut cell structure, which allows for a drastic reduction in power losses resulting from internal resistance and better heat management. The use of multi-busbar (MBB) technology makes the modules more resistant to mechanical stress and micro-cracks, which guarantees their longevity in difficult weather conditions. What distinguishes this series from the competition is, above all, optimized operation in shaded conditions, thanks to which the installation produces energy more efficiently even with unfavorable exposure. Investors appreciate these modules for their excellent price-to-quality ratio and high resistance to PID and LID degradation, which ensures yield stability over several decades of operation. The TwinPlus series is dedicated to both demanding home users and professional solar farms, offering a solid construction capable of withstanding extreme snow and wind loads. By choosing this solution, the user receives a product with a low temperature coefficient, which is key to maintaining high efficiency on the hottest days of the year, eliminating the typical power drop problems of traditional modules.

Ranking

954 panels in the segment PERC 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 19.98% 20.60% Weak · bottom 12% 12,377
Power density 199.8 206.2 Weak · bottom 12% 12,332
Temperature coefficient -0.350 -0.350 Typical 10,489
Weight per kWp 57.5 53.0 Weak · bottom 22% 11,333
Performance warranty 25 yrs 25 yrs Typical 9,912
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

5 positive · 6 caution
Best for

Residential, commercial, shaded-installations and hot-climate.

Not ideal for

Tight roof space, roofs where every square metre has to count and weight-limited structures.

Watch-outs
19.98% module efficiency

Bottom 12% of the PERC 400-450 W segment, against a median of 20.60%.

199.8 watts per square metre

Bottom 12% of the PERC 400-450 W segment, against a median of 206.2.

57.5 kg per kWp

Bottom 22% of the PERC 400-450 W segment, against a median of 53.0.

What owners get
Tier-1 manufacturer per BNEF

Phono Solar has operated since 2004 and has repeatedly been confirmed on Bloomberg New Energy Finance's Tier 1 list for its 'bankability strength', which supports project financing by banks and institutional investors.

Half-cut cells with MBB technology

Half-cutting combined with multi-busbar reduces resistive losses and improves mechanical durability, lowering susceptibility to micro-cracks under heavy snow and wind loads.

25-year power warranty with 84.8% retention

The manufacturer guarantees a linear power decline to no less than 84.8% after 25 years, a standard industry benchmark for PERC modules from this era, ensuring predictable yields over a long investment horizon.

Low temperature coefficient of -0.33%/°C

The -0.33%/°C value limits power loss at high operating temperatures, an important advantage for installations in high-irradiance climates where panel temperature exceeds 25°C for most of the year.

Optimized performance under partial shading

The half-cut architecture splits the module into independent sections, limiting output loss under partial shading and improving real-world yield for installations with atypical exposure, e.g. near chimneys or trees.

Trade-offs
Production discontinued in 2022

The TwinPlus series launched in 2019 and was discontinued in 2022, meaning limited availability of identical replacement modules for repairs or system expansion, plus potential challenges with warranty servicing over the long term.

Efficiency below comparable models

Efficiency of 19.98-20.98% trails direct segment competitors: GCL-M10/54H (21.5%), RedSolar P series (21.52%) and Jinko JS-PERC (21.7%), meaning lower installed power for the same roof area.

12-year product warranty below current standard

The 12-year product warranty is shorter than the 15-25 years now offered by many tier-1 manufacturers for materials and workmanship, which may affect the perceived residual value of the system for resale or bank financing.

Notes from the database
  • At 20.0% efficiency, this panel is 0.6pp below the PERC 400-450W median of 20.6%
  • Power density of 199.8 W/m² is 6.4 W/m² below PERC 400-450W median (206.2 W/m²) - needs more roof space
  • Temperature coefficient of -0.35%/°C matches the PERC 400-450W median
  • At 23.0 kg, weight matches the PERC 400-450W median
  • #12377 for efficiency, #10489 for temperature performance out of 14129 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 400 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 19.98 % Weak Segment median 20.60%
Vmpp · Impp 38.06 V · 10.51 A Operating point at max power
Voc · Isc 45.25 V · 11.01 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1925×1040×35 mm · 2.00 m² of roof
Weight 23.0 kg Weak Weak · 1.0 kg above median
Cells 132 · PERC Monocrystalline
Coefficient Pmax -0.350 %/°C Typical median -0.350 of its segment
Coefficient Voc · Isc -0.280 · 0.050 %/°C
NOCT 43 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 25 years Typical median 25 yrs · median 25 yrs
End-of-warranty output 84.8 % Equals 328 W guaranteed
Degradation 2.00 → 0.55 % First year, then annual

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
-0.350 %/°C against a segment median of -0.350
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Phono Solar PS400M4-22/WH 400 W 19.98% -0.350 23.0 kg You are here
LX-440M/182-108+GG 440 W 23.07% -0.240 23.6 kg Cooler, +3.1 pp, +5 yr warranty
JST-EDMH-(445-465)W-TD (450W class) 450 W 23.05% -0.300 20.5 kg +50 W, +3.1 pp, +5 yr warranty
QNN182-HG450-54 450 W 23.04% -0.290 24.0 kg +50 W, cooler, +3.1 pp
HY440-N108BDD 450 W 23.04% -0.300 23.5 kg +50 W, +3.1 pp, +5 yr warranty
NLBK-27-450 450 W 23.04% -0.300 22.9 kg +50 W, +3.1 pp, +5 yr warranty
RS41-450NBG-E3 450 W 23.04% -0.290 24.5 kg +50 W, cooler, +3.1 pp
PS405M4-22/WH 405 W 20.23% -0.350 23.0 kg +0.2 pp
PS410M4-22/WH 410 W 20.48% -0.350 23.0 kg +10 W, +0.5 pp
PS415M4-22/WH 415 W 20.73% -0.350 23.0 kg +15 W, +0.8 pp
PS420M4-22/WH 420 W 20.98% -0.350 23.0 kg +20 W, +1.0 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg +160 W, cooler, +4.8 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg +155 W, cooler, +4.6 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg +150 W, cooler, +4.4 pp
JAT60S40-540/LR 540 W 24.40% -0.260 23.5 kg +140 W, cooler, +4.4 pp
GK-5-60HG-540M 540 W 24.40% -0.260 23.3 kg +140 W, cooler, +4.4 pp
JKM545-54QL6-DV-F1-EU 545 W 24.27% -0.260 27.5 kg +145 W, cooler, +4.3 pp

Found 27 panels of the same or similar size to this one, within ±10 mm. See them here Found 35 panels of the same or similar size to this one, within ±25 mm. See them here Found 245 panels of the same or similar size to this one, within ±50 mm. See them here Found 1940 panels of the same or similar size to this one, within ±100 mm. See them here

About the TWINPLUS MODULE SERIES series

6 answered

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

Is the Phono Solar TwinPlus series still available for purchase?
The TwinPlus series has been discontinued and is no longer part of the regular product lineup at major distributors. Remaining stock may still be found at select resellers. If you need a current equivalent, it is worth asking your supplier about newer Phono Solar series or comparing offers from other Tier 1 manufacturers with similar PERC module specifications.
What warranties come with Phono Solar TwinPlus panels?
Phono Solar offered a 12-year product warranty covering manufacturing defects and mechanical failures, plus a 25-year linear power warranty. The power warranty guarantees the module retains at least 80-83% of its rated output after 25 years of operation. This is the standard Tier 1 benchmark, ensuring predictable energy yields over the full operational lifetime of the installation.
What are the practical benefits of half-cut cells and multi-busbar (MBB) technology in the TwinPlus?
Half-cut PERC cells reduce internal resistance and heat loss, which lowers power losses under partial shading on a 420 Wp module. The multi-busbar (MBB) design distributes mechanical stress across more busbars, reducing the risk of microcracks. The result is greater durability, improved resistance to LID and PID degradation, and more stable output under variable weather conditions.
How do Phono Solar TwinPlus 420 Wp panels perform in high summer temperatures?
The TwinPlus series features a low temperature coefficient (typically around -0.35%/°C for Pmax), meaning relatively small power losses during heat waves. Compared to older polycrystalline modules, they lose less efficiency as cell temperature rises above 25°C. This matters especially in rooftop installations where module temperature can exceed 60-70°C on sunny days.
Do TwinPlus panels handle partial shading well, for example from a chimney or dormer?
Yes, the TwinPlus series is specifically optimized for shaded conditions. The half-cut cell layout means that shading the upper or lower half of the module does not shut down the entire cell string as it would in a conventional module. In practice this translates to higher energy yield on roofs with obstructions. For installations with complex, multi-source shading, adding power optimizers or microinverters will further improve MPPT performance.
Are Phono Solar TwinPlus modules suitable for a utility-scale solar farm, or only for residential use?
The TwinPlus series was designed for both residential prosumer installations and commercial solar farms. The aluminum frame meets IEC load ratings for extreme snow and wind, and modules up to 420 Wp string well in larger arrays. For current utility-scale projects, however, newer high-power modules (500+ Wp) typically offer lower balance-of-system (BoS) costs per peak kilowatt and may be a better fit.
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