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Phono Solar PS550M6-24/TH
Phono Solar Brand review

PS550M6-24/TH

550 Wp PERC
ComparePV verdict

Strong in heat, short guarantee

Rank 8,102 of 14,129
Compare panels Datasheet PDF
Power (Wp)
550
Weak · bottom 15%
Efficiency (%)
21.29
Typical · median 21.29%
Density (Wp/m²)
212.9
Typical · median 212.9
Temp (%/°C)
-0.330
Strong · top 7%
Weight (kg)
28.0
Typical · median 30.8 kg
Warranty (yrs)
25
Weak · bottom 24%

The Phono Solar Twinplus Module Series (High Efficiency Mono-PERC M6-10B-R) was designed with the goal of maximizing yield from every square meter of roof space, without complicating the installation project. It employs monocrystalline cells Mono-PERC and half-cell architectures, genuinely improving module performance under everyday conditions-particularly with partial shading, dirt accumulation, and uneven sunlight exposure. The use of multi-busbar technology minimizes resistive losses and helps maintain stable operation, translating to a more predictable annual yield.

In practice, this is a series for investors seeking high efficiency without compromising on reliability. The modules are designed for residential and commercial rooftops, where high power density and good performance in hot conditions are key. An additional distinguishing feature is the all-black aesthetics-important where the installation needs to look as good as it works. Compared to many competitive lines, the Twinplus M6-10B-R prioritizes higher resilience to operational conditions and better tolerance to shading, rather than just paper claims.

Ranking

589 panels in the segment PERC 550-600 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.29% 21.29% Typical 8,776
Power density 212.9 212.9 Typical 8,563
Temperature coefficient -0.330 -0.350 Strong · top 7% 8,613
Weight per kWp 50.9 52.7 Typical 4,290
Performance warranty 25 yrs 27 yrs Weak · bottom 24% 9,912
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

6 positive · 3 caution
Best for

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

Not ideal for

Owners who want a long output guarantee.

Strengths
-0.330 %/°C temperature coefficient

Top 7% of the PERC 550-600 W segment, against a median of -0.350. Ranked 8,613th in the whole database.

Watch-outs
25 year performance warranty

Bottom 24% of the PERC 550-600 W segment, against a median of 27 yrs.

What owners get
9 consecutive years on BNEF Tier 1

Phono Solar (founded 2004) has held BloombergNEF Tier 1 status for 9 consecutive years, including the 2024 listing, confirming strong bankability and supplier reliability for non-recourse project financing.

Efficiency in line with segment leaders

The 20.71-21.48% efficiency range is fully competitive with top Mono-PERC 535-555W peers: JA Solar DEEP BLUE 3.0 (21.5%), ET Solar Elite PLUS (21.4%), and Boviet Solar VEGA (21.3%), with no meaningful technology gap.

Half-cut and multi-busbar reduce losses

Half-cut cell architecture combined with multi-busbar technology lowers resistive losses and improves tolerance to partial shading and uneven irradiance, resulting in more stable annual energy yield.

High power density up to 555 Wp

The maximum 555 Wp output matches the best peer comparables in the segment, making the series attractive for roof-constrained residential and commercial installations.

All-black aesthetic finish

The full-black design (frame and cell background) meets residential buyers' expectations, where rooftop appearance carries weight comparable to electrical performance.

Trade-offs
Production discontinued in 2024

The Twinplus M6-10B-R series was phased out after 4 years on the market (2020-2024), meaning limited module availability for future system expansions and potentially longer lead times on warranty claims as the product line winds down.

Product warranty below current market standard

The 12-year product / 25-year power warranty reflects the 2020-2022 PERC generation, while current tier-1 offerings - including newer N-type/TOPCon series - increasingly provide 15-25 year product warranties and 30-year power warranties.

Notes from the database
  • Efficiency of 21.3% matches the PERC 550-600W median
  • At 212.9 W/m² power density, roof space requirements are typical for PERC 550-600W panels
  • At -0.33%/°C, hot weather performance is typical for PERC 550-600W panels
  • 28.0 kg weight - 2.8 kg lighter than PERC 550-600W median (30.8 kg), reducing installation effort
  • In the top 62% for efficiency among all PERC panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 550 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.29 % Typical Segment median 21.29%
Vmpp · Impp 41.55 V · 13.24 A Operating point at max power
Voc · Isc 49.59 V · 13.82 A Sizes the string length
Dimensions 2278×1134×35 mm · 2.58 m² of roof
Weight 28.0 kg Typical Typical · median 30.8 kg
Cells 144 · PERC Monocrystalline
Coefficient Pmax -0.330 %/°C Strong top 7% of its segment
Coefficient Voc · Isc -0.260 · 0.042 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 25 years Weak bottom 24% · median 27 yrs
End-of-warranty output 84.8 % Equals 451 W guaranteed
Degradation 2.00 → 0.55 % First year, then annual

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 550 Wp appear here. The rest cover the whole series.

25-year Linear Performance Warranty 25-year Linear Performance Warranty Whole series Current-Voltage (I-V) Curves Current-Voltage (I-V) Curves 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
-0.330 %/°C against a segment median of -0.350
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Phono Solar PS550M6-24/TH 550 W 21.29% -0.330 28.0 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, +3.7 pp, +5 yr warranty
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg Cooler, +3.5 pp, +5 yr warranty
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg Cooler, +3.4 pp, +5 yr warranty
WST-505BKX54-A2 505 W 24.70% -0.260 25.0 kg Cooler, +3.4 pp, +5 yr warranty
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg Cooler, +3.3 pp, +5 yr warranty
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg -50 W, cooler, +3.2 pp
PS535M8GF-24/TH 535 W 20.71% -0.330 32.0 kg Heavier, -0.6 pp, +5 yr warranty
PS540M8-24/TH 540 W 20.90% -0.350 28.0 kg -10 W, hotter, -0.4 pp
PS545M8-24/TH 545 W 21.10% -0.350 28.0 kg Hotter
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +100 W, cooler, +3.9 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg +95 W, cooler, +3.7 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg +90 W, cooler, +3.5 pp
AIKO-A635-MAE72Mw 635 W 24.60% -0.260 27.0 kg +85 W, cooler, +3.3 pp
AIKO-A630-MAH72Dw 630 W 24.40% -0.260 32.5 kg +80 W, cooler, +3.1 pp

Found 2327 panels of the same or similar size to this one, within ±10 mm. See them here Found 2369 panels of the same or similar size to this one, within ±25 mm. See them here Found 2383 panels of the same or similar size to this one, within ±50 mm. See them here Found 2548 panels of the same or similar size to this one, within ±100 mm. See them here

About the Twinplus Module Series (High Efficiency Mono-PERC M6-10B-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 M6-10B-R series still available for purchase?
The Twinplus Module High Efficiency Mono-PERC M6-10B-R series has been discontinued and is no longer actively offered by the manufacturer. Limited stock may still exist with some distributors, but it should not be relied upon when planning a new installation. For comparable performance, consider current Phono Solar models or another Tier 1 module with similar power output and PERC or TOPCon technology.
What warranty does Phono Solar offer on the Twinplus M6-10B-R modules?
The manufacturer provided a 12-year product warranty covering material and workmanship defects, and a 25-year linear power warranty. This means the module should retain at least 80-83% of its nominal power output after 25 years of operation. Since the series is discontinued, handling of any warranty claims depends on Phono Solar's current procedures and the local distributor's policies.
What are the practical benefits of half-cut cell and multi-busbar technology in the Twinplus M6-10B-R?
Half-cut cell technology splits each cell in two, reducing the current flowing through it and lowering resistive losses. Multi-busbar design further shortens the electron path to the contact points. In real-world conditions, this translates to better performance under partial shading, reduced heat buildup at cell interconnects, and more consistent annual energy yield compared to modules built on older cell architectures.
Are the all-black Twinplus M6-10B-R panels suitable for a pitched residential roof?
Yes, this series was designed with residential rooftop prosumer installations in mind. The all-black finish, featuring black frames and a black cell backsheet, provides an aesthetically clean look on tile or metal roofs. With up to 555 Wp per module, the high power density allows maximizing output on a limited roof area, which is especially important on smaller or partially shaded roof sections.
How do the Twinplus M6-10B-R modules perform on hot days when rooftop temperature exceeds 50°C?
All silicon cells lose output as temperature rises. The PERC technology used in this series offers a slightly better temperature coefficient than standard BSF cells. The manufacturer rated the nominal operating cell temperature (NOCT) at approximately 45°C, which limits thermal losses under high irradiance. With adequate airflow beneath the module, annual energy yield is more predictable than with older cell technologies.
What is the peak power of the Phono Solar Twinplus M6-10B-R panel, and how many modules are needed for a 10 kWp system?
The peak power of this series reaches 555 Wp under STC conditions. To build a 10 kWp system you would need approximately 18 modules (18 × 555 Wp = 9.99 kWp). Since the series is discontinued, sourcing that many identical units is difficult. For any new installation, choosing a currently manufactured series is strongly recommended to avoid issues with module matching or future replenishment.
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