Skip to main content
Phono Solar Brand review

PS445M4H-24/TH

445 Wp PERC
ComparePV verdict

Solid all-round for its segment

Rank 11,548 of 14,129
Compare panels Datasheet PDF
Power (Wp)
445
Strong · top 5%
Efficiency (%)
20.39
Typical · median 20.60%
Density (Wp/m²)
203.9
Typical · median 206.2
Temp (%/°C)
-0.350
Typical · median -0.350
Weight (kg)
25.0
Typical · median 22.0 kg
Warranty (yrs)
25
Typical · median 25 yrs

Phono Solar TwinPlus M4-9B-R series panels represent an advanced response to the needs of modern prosumer installations, utilizing Half-Cut cell technology to radically reduce power losses caused by internal resistance. Thanks to the innovative nine-busbar (9BB) architecture, these modules ensure smoother current flow and significantly higher resistance to micro-cracks, which directly translates into long-term system reliability. The TwinPlus design effectively mitigates the negative effects of partial shading, allowing the lower and upper parts of the panel to work independently, solving one of the most common problems on roofs with complex structures. This series stands out from the competition with a minimal potential-induced degradation (PID) coefficient and excellent performance in low-light conditions. It is an ideal choice for investors seeking maximum efficiency per square meter while maintaining the highest aesthetic standards. The use of these modules in an installation guarantees stable energy yields and high resistance to extreme weather phenomena, such as strong winds or heavy snow loads. By choosing the M4-9B-R model, you are investing in solid energy foundations and hot-spot resistant technology, which effectively shortens the return on investment time.

Ranking

954 panels in the segment PERC 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 20.39% 20.60% Typical 11,765
Power density 203.9 206.2 Typical 11,719
Temperature coefficient -0.350 -0.350 Typical 10,489
Weight per kWp 56.2 53.0 Typical 10,542
Performance warranty 25 yrs 25 yrs Typical 9,912
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.

What owners get
Tier-1 manufacturer per BNEF since 2014

Phono Solar (founded 2004) has been continuously listed on BloombergNEF's Tier 1 list for nine consecutive years, confirming financial stability and bankability for projects financed by lending institutions.

Half-cut cells with 9BB technology

Half-cut PERC cells with nine busbars (9BB) reduce resistive losses and improve microcrack resistance compared to older 5BB/6BB modules, translating into higher mechanical durability under thermal cycling.

PID and hot-spot protection

The TwinPlus design minimizes potential-induced degradation (PID) and hot-spot formation risk, which matters for long-term operation on roofs with variable irradiance patterns.

Independent operation of panel halves

The TwinPlus architecture lets the upper and lower halves of the module operate independently, limiting yield loss under partial shading - a common issue on roofs with chimneys or antennas.

Trade-offs
Production discontinued

The TwinPlus M4-9B-R series (launched 2021) has been discontinued, meaning limited availability of identical replacement modules for system extensions and potentially longer lead times for warranty claims on parts.

PERC technology trails TOPCon

Efficiency of 20.39-21.3% is lower than newer TOPCon-based competitors, e.g. Luxor Solar ECO LINE (23.6%) or Jinko Solar JS182MHC120 (21.48%) - a gap of up to 2.3 pp, meaning lower energy yield for the same roof area.

12-year product warranty below current standard

The 12-year materials/workmanship warranty is shorter than the current market standard for new Tier-1 series (often 15-25 years), which may affect the perceived long-term value of the investment.

No bifacial variant

Unlike the competing Luxor Solar ECO LINE TOPCON GLASS-GLASS BIFACIAL series, TwinPlus M4-9B-R modules are monofacial and do not capture the additional rear-side energy gain available from bifacial designs.

Notes from the database
  • Efficiency of 20.4% matches the PERC 400-450W median
  • Power density of 203.8 W/m² matches the PERC 400-450W median
  • Temperature coefficient of -0.35%/°C matches the PERC 400-450W median
  • Weight of 25.0 kg is 3.0 kg above PERC 400-450W median (22.0 kg) - verify structural support
  • #11765 for efficiency, #10489 for temperature performance out of 14129 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 445 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.39 % Typical Segment median 20.60%
Vmpp · Impp 41.21 V · 10.80 A Operating point at max power
Voc · Isc 49.11 V · 11.29 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2101×1039×35 mm · 2.18 m² of roof
Weight 25.0 kg Typical Typical · median 22.0 kg
Cells 144 · PERC Monocrystalline
Coefficient Pmax -0.350 %/°C Typical median -0.350 of its segment
Coefficient Voc · Isc -0.280 · 0.050 %/°C
NOCT 45 °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 365 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 PS445M4H-24/TH 445 W 20.39% -0.350 25.0 kg You are here
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +50 W, cooler, +4.4 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, +4.1 pp, +5 yr warranty
STP-NT11/48QGSF-490 490 W 24.50% -0.260 21.5 kg Cooler, +4.1 pp, +5 yr warranty
JAT54S40-485/LR 485 W 24.30% -0.260 19.3 kg Cooler, lighter, +3.9 pp
AIKO-A485-MCE54Mw 485 W 24.30% -0.260 21.0 kg Cooler, +3.9 pp, +5 yr warranty
LR7-54HJD-495M 495 W 24.30% -0.240 23.5 kg +50 W, cooler, +3.9 pp
AIKO-A485-MAH54Mw 485 W 24.30% -0.260 21.5 kg Cooler, +3.9 pp, +5 yr warranty
NS-430MH-144 430 W 19.72% -0.290 24.0 kg -15 W, cooler, -0.7 pp
NS-440MH-144 440 W 20.18% -0.290 24.0 kg Cooler, lighter, -0.2 pp
PS450M4H-24/TH 450 W 20.61% -0.350 25.0 kg +0.2 pp
NS-450MH-144 450 W 20.64% -0.290 24.0 kg Cooler, lighter, +0.2 pp
PS455M4H-24/TH 455 W 20.84% -0.350 25.0 kg +10 W, +0.4 pp
PS460M4H-24/TH 460 W 21.07% -0.350 25.0 kg +15 W, +0.7 pp
GKA120N-PRO-590W 590 W 23.82% -0.300 26.7 kg +145 W, +3.4 pp, +5 yr warranty
GKA120N-PRO-585W 585 W 23.62% -0.300 26.7 kg +140 W, +3.2 pp, +5 yr warranty
BGO 580 580 W 23.50% -0.290 26.0 kg +135 W, cooler, +3.1 pp

Found 286 panels of the same or similar size to this one, within ±10 mm. See them here Found 325 panels of the same or similar size to this one, within ±25 mm. See them here Found 352 panels of the same or similar size to this one, within ±50 mm. See them here Found 1050 panels of the same or similar size to this one, within ±100 mm. See them here

About the TWINPLUS MODULE SERIES M4-9B-R 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 M4-9B-R series still available for purchase?
The Phono Solar TwinPlus M4-9B-R series has been discontinued and is no longer actively manufactured. If you are planning a new PV installation, ask your distributor about current replacements with comparable half-cut and 9BB technology - Phono Solar offers newer series with similar specifications. Some units may still be available through distributor stock on a limited basis.
What warranty does the Phono Solar TwinPlus M4-9B-R panel come with?
The manufacturer provides a 12-year product warranty covering defects in materials and workmanship, along with a 25-year linear power output warranty. This means the module is guaranteed to retain a specified percentage of its rated power over a quarter century. As a Tier 1 manufacturer, Phono Solar's warranty commitments carry added credibility and financial backing.
What are the real benefits of 9BB technology in the TwinPlus M4-9B-R, and is it worth it?
Nine busbars reduce the current path across each cell, lowering resistive losses and significantly improving resistance to microcracks. In practice this means higher energy yield over the module's lifetime and reduced risk of power loss from mechanical stress during shipping or installation. This matters especially in climates with large temperature swings, where thermal cycling puts repeated stress on cell interconnects.
How does the TwinPlus M4-9B-R 465 W panel handle partial shading from a chimney or antenna?
The half-cut cell architecture splits each cell into two independent halves, so shading on the lower portion of the panel does not block current flow in the upper half. Power losses under partial shade are therefore significantly lower than with conventional full-cell modules. This is a practical advantage on rooftops with chimneys, dormers, or antennas where some shading during the day is unavoidable.
How many watts does the Phono Solar TwinPlus M4-9B-R produce, and how many panels do I need for a 10 kWp system?
The highest-rated variant in this series delivers 465 Wp under STC conditions. To build a 10 kWp system you would need approximately 22 modules (10,000 ÷ 465 ≈ 21.5). The exact count depends on the chosen inverter and roof layout. The high per-module wattage lets you fit a larger system into a limited roof area compared to lower-power alternatives.
Does the TwinPlus M4-9B-R PERC panel perform well on overcast days?
Mono-PERC technology delivers better efficiency under diffuse and low-irradiance conditions than standard polycrystalline cells. The manufacturer's documentation confirms strong low-light performance for this series. In climates with frequent cloud cover - especially during autumn and winter - this translates into a measurably higher annual energy yield compared to modules with weaker low-light response.
Add to compare