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Q-Cells Brand review

Q.TRON S-G3R.12+ / BFG 450

450 Wp TOPCon Bifacial 70%
ComparePV verdict

Light for its output, weak in heat

Rank 6,031 of 14,005
Compare panels Datasheet PDF
Power (Wp)
450
Weak · bottom 9%
Efficiency (%)
22.50
Typical · median 22.52%
Density (Wp/m²)
225.2
Typical · median 225.2
Temp (%/°C)
-0.300
Weak · bottom 20%
Weight (kg)
20.9
Strong · 3.1 kg below median
Warranty (yrs)
30
Typical · median 30 yrs

The Q-Cells Q.TRON S-G3R+ solar panel series represents a milestone in the development of residential solar system technology, basing its design on breakthrough N-type cells. The use of Q.ANTUM NEO technology allows for significantly higher energy conversion efficiency than standard modules, which directly translates into maximizing yields even from limited roof space. Thanks to this, the series solves the problem of small or complex roof areas, offering high power density in a compact form. A unique feature of the modules is their exceptional resistance to degradation and excellent performance in low-light conditions, which in the Polish climate ensures stable energy production from dawn to dusk. These panels are primarily dedicated to prosumers seeking uncompromising quality and long-term investment security, as confirmed by a 25-year product warranty and a linear power warranty. Compared to the competition, the Q.TRON S-G3R+ stands out with its reinforced frame resistant to extreme weather conditions and an elegant design that aesthetically blends with modern architecture. By choosing these modules, you gain the certainty of using top-class TOPCon technology, which minimizes energy losses and guarantees the highest return on investment throughout the lifetime of the installation.

Ranking

1,089 panels in the segment TOPCon 450-500 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.50% 22.52% Typical 4,222
Power density 225.2 225.2 Typical 4,225
Temperature coefficient -0.300 -0.290 Weak · bottom 20% 6,093
Weight per kWp 46.4 52.2 Strong · top 17% 1,162
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

6 positive · 2 caution
Best for

Residential and cold-climate.

Not ideal for

Hot climates.

Strengths
46.4 kg per kWp

Top 17% of the TOPCon 450-500 W segment, against a median of 52.2.

Watch-outs
-0.300 %/°C temperature coefficient

Bottom 20% of the TOPCon 450-500 W segment, against a median of -0.290.

What owners get
N-type TOPCon cells with Q.ANTUM NEO

The Q.ANTUM NEO technology built on N-type TOPCon cells delivers up to 22.5% efficiency and a low power temperature coefficient of -0.28%/K, translating into higher energy yield on hot days compared to older P-type PERC modules.

30-year linear power warranty

The manufacturer guarantees 98.5% of nominal power in the first year and 88.93% after 30 years, outperforming the typical 25-year warranty with degradation down to roughly 84-85% offered by many segment competitors.

Bankable Tier-1 manufacturer

Q-Cells (Hanwha Q CELLS) is a South Korean manufacturer founded in 1999; its confirmed Tier 1 bankable status makes project financing easier through banks and leasing companies and lends high credibility to long-term warranty claims.

Bifacial design boosts energy yield

The BFG variant of the S-G3R+ series captures irradiance on the rear side of the module, which, when mounted over reflective ground or on elevated racking, can increase total energy yield by several percent versus a monofacial module of equal rated power.

Reinforced frame for mechanical durability

The series features a reinforced frame rated for higher snow and wind loads, which is relevant in Polish climate conditions with periodic winter snowfall.

Trade-offs
Lower efficiency than some competitors

At the same 450 Wp maximum power, competitors such as SunKean and Sunket New Energy offer 23.04% efficiency versus 22.5% for the Q.TRON S-G3R+, meaning they reach identical power output with a slightly smaller module footprint - relevant for very constrained roof space.

Notes from the database
  • At 22.5% efficiency, this panel is on par with typical TOPCon 450-500W modules
  • At 225.2 W/m² power density, roof space requirements are typical for TOPCon 450-500W panels
  • At -0.30%/°C, hot weather performance is typical for TOPCon 450-500W panels
  • At 20.9 kg, this panel is 3.1 kg lighter than TOPCon 450-500W median (24.0 kg) - easier handling during installation
  • Bifacial design (70% factor) captures reflected light - adds 4-10% yield on ground-mount or white roof

Specifications

Open datasheet PDF
Nominal power (Pmax) 450 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.50 % Typical Segment median 22.52%
Vmpp · Impp 30.08 V · 14.97 A Operating point at max power
Voc · Isc 35.03 V · 16.05 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 20.9 kg Strong Strong · 3.1 kg below median
Cells 96 · TOPCon Monocrystalline
Bifaciality 70 % Rear output as a share of front
Coefficient Pmax -0.300 %/°C Weak bottom 20% of its segment
Coefficient Voc · Isc -0.250 · 0.040 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 25 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 88.9 % Equals 400 W guaranteed
Degradation 1.50 → 0.33 % 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
-
With bifacial gain
-

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
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
Q-Cells Q.TRON S-G3R.12+ / BFG 450 450 W 22.50% -0.300 20.9 kg You are here
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +45 W, cooler, +2.3 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +40 W, cooler, +2.0 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +50 W, cooler, +2.0 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +50 W, cooler, +2.0 pp
GK-3-54HGb-500M 500 W 24.50% -0.260 21.4 kg +50 W, cooler, +2.0 pp
GCL-NR10R/54BGDF 500 W 24.50% -0.260 24.6 kg +50 W, cooler, +2.0 pp
Q.TRON BLK S-G3R.12+ / BFG 435Wp 435 W 21.80% -0.300 20.9 kg -15 W, -0.7 pp
Q.TRON BLK S-G3R.12+ / BFG 440Wp 440 W 22.00% -0.300 20.9 kg -10 W, -0.5 pp
Q.TRON BLK S-G3R.12+ / BFG 445Wp 445 W 22.30% -0.300 20.9 kg Very close match
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +60 W, cooler, +2.5 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +55 W, cooler, +2.2 pp

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

Common questions

6 answered
What is Q.ANTUM NEO technology in Q.TRON S-G3R+ panels and how does it compare to older PERC modules?
Q.ANTUM NEO is Q-Cells' proprietary technology built on N-type TOPCon cells. Unlike P-type PERC cells, TOPCon significantly reduces carrier recombination, pushing module efficiency to approximately 23.1% — well above the sub-21% typical of older Q-Cells PERC generations. The practical result is noticeably higher annual energy yield from the same roof area, which directly lowers the system's LCOE over its lifetime.
How do Q-Cells Q.TRON S-G3R+ panels perform on overcast days typical of Northern European climates?
The Q.TRON S-G3R+ series is optimized for low-irradiance conditions thanks to N-type TOPCon cell architecture. The low power temperature coefficient of –0.30 %/K means the modules generate electricity efficiently on cool, cloudy days. Higher current under diffuse light ensures reliable production in early spring and late autumn — key for maximizing annual yield in climates with limited peak sun hours.
What warranty does Q-Cells provide on the Q.TRON S-G3R+ series?
Q-Cells offers two separate warranties: a 25-year product warranty covering material defects and workmanship, plus a 30-year linear power warranty. The module must retain at least 98.5% of rated power in year one and no less than 88.93% after 30 years. This is among the most comprehensive warranty packages in the residential PV market, backed by Hanwha Group, a Tier 1 manufacturer with a strong balance sheet.
Are Q.TRON S-G3R+ modules bifacial, and does bifaciality make sense on a pitched roof?
Yes, the Q.TRON S-G3R+ is a bifacial module with a bifaciality factor of 80% ±10% for both PMPP and ISC per IEC standards. On a pitched roof the rear-side gain is more modest than ground-mount, but with a bright roofing membrane or white underlayment, real-world energy gains of 5–10% are achievable. Bifacial performance comes at no additional cost, providing a built-in efficiency buffer throughout the module's service life.
Can Q-Cells Q.TRON S-G3R+ panels handle heavy snow loads and high wind speeds in alpine or Nordic locations?
Yes. The Q.TRON S-G3R+ is rated for a snow load of up to 5,400 Pa and a wind load of up to 2,400 Pa, meeting IEC requirements for high-load zones. The reinforced aluminum frame and an operating temperature range of –40 °C to +85 °C ensure stable performance even in harsh winter conditions. The NMOT of 45 ± 2 °C also confirms the module runs cool under real-world irradiance, reducing thermal degradation.
How many Q.TRON S-G3R+ 450 Wp panels do I need for a 10 kWp rooftop system?
At 450 Wp peak power, you need approximately 22–23 modules to reach a 10 kWp system. Compare that with 25 modules at 400 Wp — the difference translates to fewer roof penetrations, lower BoS costs, and reduced structural load. The high power density of the Q.TRON S-G3R+ series makes it especially cost-effective for rooftops with limited available area, where maximizing watts per square meter is critical.
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