--- title: "Q-Cells Q.TRON S-G3R.12+ / BFG 450 450W Solar Panel - Specs & Review | ComparePV" description: "Q-Cells Q.TRON S-G3R.12+ / BFG 450 450W solar panel. Specs: 22.50% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/q-cells-q-tron-s-g3r-12-bfg-450" updated: 2026-09-11 --- # Q-Cells Q.TRON S-G3R.12+ / BFG 450 Light for its output, weak in heat 1,089 panels in the segment TOPCon 450-500 W ## Identity - **Manufacturer:** Q-Cells - **Model:** Q.TRON S-G3R.12+ / BFG 450 - **Series:** Q.TRON S-G3R+ SERIES - **Rated power:** 450 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 450-500 W (1089 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 450 W | 465 W | Weak - bottom 9% | | | 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 (kg) | 20.9 kg | 24.0 kg | Strong - top 17% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | 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 | ### Strengths - **46.4 kg per kWp** - Top 17% of the TOPCon 450-500 W segment, against a median of 52.2. ### Watch out for - **-0.300 %/°C temperature coefficient** - Bottom 20% of the TOPCon 450-500 W segment, against a median of -0.290. - **Best for:** Residential and cold-climate. - **Not ideal for:** Hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 450 W - **Efficiency:** 22.50 % - **Voltage at Pmax (Vmp):** 30.08 V - **Current at Pmax (Imp):** 14.97 A - **Open-circuit voltage (Voc):** 35.03 V - **Short-circuit current (Isc):** 16.05 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.300 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 96 - **Bifacial:** yes ### Physical - **Length:** 1762 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 20.9 kg - **Area:** 2.00 m2 - **Power density:** 225.2 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 88.9 % - **First-year degradation:** 1.50 % - **Annual degradation:** 0.33 % - **Output after 30 years:** 400 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 4222 of 14005 | | Power density | 4225 of 14005 | | Temperature coefficient | 6093 of 14005 | | Weight | 1162 of 14005 | | Warranty | 21 of 14005 | ## Pros - **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. ## Cons - **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. ## About this series 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. ## Notable figures - 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 ## Questions ### 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. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/78ff0b9faca82357dd9455fe.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +45 W, cooler, +2.3 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +40 W, cooler, +2.0 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +50 W, cooler, +2.0 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +50 W, cooler, +2.0 pp | | [Gokin GK-3-54HGb-500M](https://comparepv.com/panel/gokin-gk-3-54hgb-500m) | 500 W | +50 W, cooler, +2.0 pp | | [GCL GCL-NR10R/54BGDF](https://comparepv.com/panel/gcl-gcl-nr10r-54bgdf) | 500 W | +50 W, cooler, +2.0 pp | | [Q-Cells Q.TRON BLK S-G3R.12+ / BFG 435Wp](https://comparepv.com/panel/q-cells-q-tron-blk-s-g3r-12-bfg-435wp) | 435 W | -15 W, -0.7 pp | | [Q-Cells Q.TRON BLK S-G3R.12+ / BFG 440Wp](https://comparepv.com/panel/q-cells-q-tron-blk-s-g3r-12-bfg-440wp) | 440 W | -10 W, -0.5 pp | | [Q-Cells Q.TRON BLK S-G3R.12+ / BFG 445Wp](https://comparepv.com/panel/q-cells-q-tron-blk-s-g3r-12-bfg-445wp) | 445 W | Very close match | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +60 W, cooler, +2.5 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +55 W, cooler, +2.2 pp | --- Source: https://comparepv.com/panel/q-cells-q-tron-s-g3r-12-bfg-450 Not in this file, on the page: a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.