--- title: "Bruk-Bet PEM.GB-470 N-Type 470W Solar Panel - Specs & Review | ComparePV" description: "Bruk-Bet PEM.GB-470 N-Type 470W solar panel. Specs: 21.71% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/bruk-bet-pem-gb-470-n-type" updated: 2026-09-11 --- # Bruk-Bet PEM.GB-470 N-Type Middle of its segment, needs the roof space 1,089 panels in the segment TOPCon 450-500 W ## Identity - **Manufacturer:** Bruk-Bet - **Model:** PEM.GB-470 N-Type - **Series:** PEM.GB - **Rated power:** 470 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) | 470 W | 465 W | Typical | | | Module efficiency | 21.71% | 22.52% | Weak - bottom 10% | 7,411 | | Power density | 217.1 | 225.2 | Weak - bottom 9% | 7,401 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 26.0 kg | 24.0 kg | Weak - bottom 14% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.71% | 22.52% | Weak - bottom 10% | 7,411 | | Power density | 217.1 | 225.2 | Weak - bottom 9% | 7,401 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 55.3 | 52.2 | Weak - bottom 14% | 9,775 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **217.1 watts per square metre** - Bottom 9% of the TOPCon 450-500 W segment, against a median of 225.2. Ranked 7,401st in the whole database. - **21.71% module efficiency** - Bottom 10% of the TOPCon 450-500 W segment, against a median of 22.52%. Ranked 7,411th in the whole database. - **55.3 kg per kWp** - Bottom 14% of the TOPCon 450-500 W segment, against a median of 52.2. - **Best for:** Residential and commercial. - **Not ideal for:** Roofs where every square metre has to count, tight roof space and weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 470 W - **Efficiency:** 21.71 % - **Voltage at Pmax (Vmp):** 35.48 V - **Current at Pmax (Imp):** 13.25 A - **Open-circuit voltage (Voc):** 42.10 V - **Short-circuit current (Isc):** 13.88 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 120 - **Bifacial:** yes ### Physical - **Length:** 1909 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 26.0 kg - **Area:** 2.16 m2 - **Power density:** 217.1 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.5 % - **Output after 30 years:** 411 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7411 of 14005 | | Power density | 7401 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 9775 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Domestic Manufacturing and Fast Warranty Service** - Bruk-Bet manufactures its modules at a facility in Tarnów and has operated in the Polish market since 1984. This means warranty claims are handled without intermediary importers, resulting in shorter service response times and no foreign-exchange risk on warranty settlements — a significant advantage for installers and institutional investors. - **N-type TOPCon in a Glass-Glass Construction** - N-type cells eliminate LID and significantly reduce LeTID compared to PERC technology, maintaining higher energy yield throughout the module's entire service life. The dual-glass construction further reduces the risk of microcracks, moisture ingress, and encapsulant yellowing — the primary causes of premature degradation. - **Bifacial — Energy Harvest from Both Sides** - Bifacial technology enables an additional 5–15% energy gain from albedo irradiance reflected off the mounting surface (typical bifacial gain for white gravel or light-colored concrete is 8–12%). Particularly cost-effective in ground-mounted systems, carports, and flat-roof installations with a high-reflectance surface. - **30-Year Linear Power Warranty** - The manufacturer guarantees ≥87.4% of nominal power output after 30 years — five years longer than the standard 25-year warranties offered by most competitors in this power class. The extended power warranty directly improves project financials, lowering LCOE and enhancing bankability for third-party financing. - **In-House Accelerated Aging Tests** - Bruk-Bet is among a select group of manufacturers worldwide that conduct proprietary tests simulating 25 years of module operation under extreme conditions. This independent durability validation reduces risk for both the installer and the end investor compared to manufacturers relying solely on standard IEC certifications. ## Cons - **Efficiency Noticeably Below Peer Comparables** - At the same nominal power of 470 Wp, the PEM.GB module achieves an efficiency of 21.71%, while direct peer comparables — the Recom Lynx and Sunlike Solar SKT470 — reach 23.52%. This 1.81 percentage-point gap translates to approximately 8.3% greater physical module area for the Bruk-Bet unit (~2.16 m² vs. ~2.00 m²), limiting total system power output on rooftops with constrained or irregular usable surface area. ## About this series The Bruk-Bet PEM.GB series are **glass-glass** modules designed for stable operation for many years in Polish conditions - both on roofs and in larger installations. Thanks to **N-Type monocrystalline** cells, the modules better handle performance drops over time and maintain high energy production even with lower sunlight. The double-glass construction increases resistance to weather and minor damage, which effectively reduces the risk of claims and downtime. PEM.GB also features **bifacial technology**, which allows for the use of reflected light from the ground - a significant advantage on bright roofs, ground-mounted structures, or carports. For investors, the **longer warranty period** also plays a crucial role in the project's long-term profitability. This is a series for individuals and companies who want to combine durability, predictable yields, and modern technology without compromise. ## Notable figures - At 21.7% efficiency, this panel is 0.8pp below the \*\*TOPCon 450-500W\*\* median of 22.5% - 217.1 W/m² power density is 8.1 W/m² below \*\*TOPCon 450-500W\*\* median (225.2 W/m²) - requires larger installation area - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 450-500W\*\* median - At 26.0 kg (2.0 kg above \*\*TOPCon 450-500W\*\* median of 24.0 kg), requires checking roof load capacity - #7411 for efficiency, #2165 for temperature performance out of 14005 panels ## Questions ### What warranty coverage applies to Bruk-Bet PEM.GB panels? The PEM.GB series comes with a 25-year product warranty covering defects and workmanship, as well as a 30-year linear power output warranty. This is one of the longest warranty packages available on the market, which directly translates into strong long-term investment returns. Bruk-Bet is headquartered in Poland, which simplifies the process of filing warranty claims when needed. ### Do Bruk-Bet PEM.GB panels perform well in winter and under overcast conditions? Yes. The N-Type TOPCon cells used in the PEM.GB series exhibit a low temperature coefficient of power and superior performance under diffuse, low-irradiance conditions. This means that under typical Polish autumn and winter weather, PEM.GB modules generate proportionally more energy than older PERC-based modules of the same rated power. The bifacial technology additionally enables the modules to harvest light reflected from snow cover. ### What advantage does bifacial technology offer in PEM.GB panels, and when does it make the most sense? Bifacial modules generate electricity from both the front and rear sides of the panel. In the PEM.GB series, the rear side captures light reflected from the ground, roof surface, or surrounding environment. The benefit is most pronounced on light-colored roofing surfaces, ground-mounted systems, and carport installations, where energy yield can increase by as much as 10–25% compared to a conventional monofacial panel of the same nominal power rating. ### How does the glass-glass construction of the PEM.GB differ from standard aluminum-framed panels? PEM.GB modules feature two tempered glass layers in place of a rear backsheet and aluminum frame. The dual-glass construction provides enhanced resistance to moisture ingress, UV radiation, and mechanical micro-damage, reducing the risk of delamination and potentially extending module service life beyond 30 years. The structure is heavier than a conventional framed module, so it is advisable to verify the load-bearing capacity of the roof or mounting structure prior to installation. ### What is the maximum power output of a single Bruk-Bet PEM.GB panel? The peak power output in the PEM.GB series reaches 470 Wp. This value is measured under Standard Test Conditions (STC). Thanks to the combination of TOPCon cell technology and bifacial design, the actual annual energy yield can exceed what would be expected from a straightforward nameplate power comparison with PERC modules in the same power class. ### Are Bruk-Bet PEM.GB panels manufactured in Poland? Yes, Bruk-Bet is headquartered and manufactures its products in Poland. This is an important consideration for investors who value short supply chains, faster technical support, and the ability to contact the manufacturer directly for service or warranty matters. Domestic production also ensures full manufacturer liability under EU regulations. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Optimal-Edge-Glass-Glass-karta-produktowa-PEM-GB-470-ac57f7569ac4.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +40 W, cooler, +3.3 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +3.1 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +35 W, cooler, +3.0 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, lighter, +2.8 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +30 W, cooler, +2.8 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +30 W, lighter, +2.8 pp | | [Bruk-Bet PEM.GB-480 N-Type](https://comparepv.com/panel/bruk-bet-pem-gb-480-n-type) | 480 W | +10 W, +0.5 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +90 W, cooler, +3.1 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +85 W, cooler, +2.9 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | +80 W, lighter, +2.7 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | +70 W, cooler, +2.7 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | +70 W, cooler, +2.7 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | +75 W, cooler, +2.6 pp | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | +75 W, cooler, +2.5 pp | --- Source: https://comparepv.com/panel/bruk-bet-pem-gb-470-n-type Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.