--- title: "Bruk-Bet PEM.GB-480 480W Solar Panel - Specs & Review | ComparePV" description: "Bruk-Bet PEM.GB-480 480W solar panel. Specs: 22.17% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/bruk-bet-pem-gb-480" updated: 2026-09-11 --- # Bruk-Bet PEM.GB-480 Efficiency leader, no clear weak spot 449 panels in the segment PERC 450-500 W ## Identity - **Manufacturer:** Bruk-Bet - **Model:** PEM.GB-480 - **Series:** OPTIMAL EDGE Glass-Glass - **Rated power:** 480 W - **Cell technology:** PERC - **Bifacial:** yes ## How it compares Compared against segment PERC 450-500 W (449 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 480 W | 460 W | Typical | | | Module efficiency | 22.17% | 20.82% | Strong - top 1% | 5,963 | | Power density | 221.7 | 208.5 | Strong - top 1% | 5,914 | | Temperature coefficient | -0.290 | -0.350 | Strong - top 1% | 2,165 | | Weight (kg) | 26.0 kg | 24.5 kg | Typical | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 20% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.17% | 20.82% | Strong - top 1% | 5,963 | | Power density | 221.7 | 208.5 | Strong - top 1% | 5,914 | | Temperature coefficient | -0.290 | -0.350 | Strong - top 1% | 2,165 | | Weight per kWp | 54.2 | 53.1 | Typical | 8,370 | | Performance warranty | 30 yrs | 25 yrs | Strong - top 20% | 21 | ### Strengths - **22.17% module efficiency** - Top 1% of the PERC 450-500 W segment, against a median of 20.82%. Ranked 5,963rd in the whole database. - **221.7 watts per square metre** - Top 1% of the PERC 450-500 W segment, against a median of 208.5. Ranked 5,914th in the whole database. - **-0.290 %/°C temperature coefficient** - Top 1% of the PERC 450-500 W segment, against a median of -0.350. Ranked 2,165th in the whole database. - **Best for:** Residential and commercial. ## Specification ### Electrical - **Rated power (Pmax):** 480 W - **Efficiency:** 22.17 % - **Voltage at Pmax (Vmp):** 35.90 V - **Current at Pmax (Imp):** 13.37 A - **Open-circuit voltage (Voc):** 42.46 V - **Short-circuit current (Isc):** 14.00 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:** PERC - **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:** 221.7 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:** 420 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 5963 of 14005 | | Power density | 5914 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 8370 of 14005 | | Warranty | 21 of 14005 | ## Pros - **22.17% Efficiency Among Top-Tier Peers** - A peak module efficiency of 22.17% positions the series directly alongside leading competitors such as the Sunket SKT480 (22.24%) and Shinson S-Blade BIPV (22.24%), and well above the First Solar Series 6 Plus Bifacial (19%). For a typical 10 kWp residential installation, this translates to approximately 15% less roof area required compared to 19%-efficiency modules. - **30-Year Linear Power Output Warranty** - The manufacturer provides a 30-year linear power output warranty — five years longer than the prevailing industry standard of 25 years. For commercial installations and prosumers operating under long-term financial models, this directly results in a higher guaranteed cumulative energy yield over the contract period. - **Above-Standard KIWA Certification** - Bruk-Bet subjected the modules to 400 thermal cycles (2× the IEC requirement) as well as PID, LID, ammonia, and salt mist resistance testing at a KIWA laboratory. For agricultural, coastal, and industrial installations, this constitutes hard documentary evidence that not every manufacturer provides without an additional charge for an 'enhanced' variant. - **N-Type Technology: No LID and Lower Degradation** - N-type cell technology eliminates the Light Induced Degradation (LID) effect inherent to P-type/PERC cells, and the temperature coefficient is typically 20–25% more favorable than PERC (~-0.26%/°C vs. ~-0.35%/°C). This results in higher energy yields on hot days and a lower real-world annual degradation rate. - **Bifacial Design with Local Service Network** - Bifacial energy harvesting enables an additional 5–15% energy gain from ground or rooftop reflections, depending on surface albedo. The manufacturer has operated in Poland since 1984 and maintains a domestic distribution network, resulting in faster service response times compared to importers without a local support infrastructure. ## Cons - **No PVEL Scorecard or BNEF Tier-1 Status** - Bruk-Bet does not participate in PVEL (PV Evolution Labs) testing nor in the Bloomberg NEF Tier-1 ranking. For large commercial installations financed through bank loans or leasing, the absence of this status may complicate or preclude project acceptance by lenders that require Tier-1-listed modules as a condition of bankability. - **Higher Module Weight Due to Glass-Glass Construction** - The glass-glass construction results in an estimated module weight of ~26–28 kg, compared to ~21–23 kg for glass-foil equivalents of the same power class. Installation on an existing roof requires a structural load-bearing assessment, which adds the cost of a building engineering survey and may rule out installation on older roofs with limited load capacity. ## About this series Bruk-Bet OPTIMAL EDGE Glass-Glass photovoltaic panels are technologically advanced modules that utilize a double tempered glass construction to ensure uncompromising protection for silicon cells. Thanks to the use of modern **N-Type** monocrystalline cells, this series is characterized by outstanding efficiency and significantly lower power degradation over time, which guarantees stable energy yields for decades. The glass-glass structure eliminates the traditional backsheet, which directly translates into **extreme resistance to external factors** such as humidity, ammonia, or salt mist. These modules effectively solve the problem of micro-cracks and chemical corrosion, offering structural rigidity ideal for installations exposed to extreme wind and heavy snow loads. A key advantage for the investor is the **increased fire resistance class**, which significantly raises the level of fire safety for the entire facility. OPTIMAL EDGE Glass-Glass is a solution dedicated to demanding prosumers and businesses that prioritize **maximum longevity and investment security** in harsh environmental conditions. Compared to the competition, the product stands out with its Polish heritage and rigorous endurance tests, which confirm its reliability where standard backsheet-based solutions may prove insufficient. ## Notable figures - Efficiency of 22.2% is 1.4pp above the \*\*PERC 450-500W\*\* median (20.8%) - At 221.7 W/m² power density, this panel generates 13.2 W/m² more per unit area than \*\*PERC 450-500W\*\* median (208.5 W/m²) - Temperature coefficient of -0.29%/°C vs median -0.35%/°C means ~2% less power loss at 65°C - Weight of 26.0 kg is 1.5 kg above \*\*PERC 450-500W\*\* median (24.5 kg) - verify structural support - Ranked #5963 out of 14005 panels for efficiency in the database ## Questions ### How does the glass-glass construction of Bruk-Bet OPTIMAL EDGE panels differ from standard modules with a backsheet? In standard panels, the rear electrical insulation backsheet gradually degrades under UV radiation, moisture, and heat, promoting cell corrosion and microcracks. The OPTIMAL EDGE Glass-Glass series replaces the backsheet with tempered glass, eliminating these failure modes. The result is superior resistance to moisture ingress, ammonia, and salt mist, greater mechanical rigidity, and an improved fire resistance rating that enhances the safety of the entire installation. ### What warranty is offered on Bruk-Bet OPTIMAL EDGE Glass-Glass panels? The manufacturer provides a 25-year product warranty covering physical and material defects, along with a 30-year linear power output warranty. N-type cell technology exhibits a significantly lower annual degradation rate than older P-type cells, meaning the module maintains stable energy yields over three decades. This is one of the most comprehensive warranty packages available in this product class. ### What does it mean that the OPTIMAL EDGE Glass-Glass panel is bifacial, and how much additional energy can be gained? Bifacial means the panel generates electricity from both its front and rear surfaces by capturing light reflected from the ground or mounting surface. Depending on the albedo of the surface and the tilt angle, bifacial gain can range from a few percent to over ten percent of additional annual energy yield. The effect is most pronounced on high-albedo surfaces such as white roofing membranes, light-colored gravel, or snow — conditions common during Polish winters. ### Are OPTIMAL EDGE Glass-Glass panels suitable for installations near the sea or on livestock farms? Yes, this series is specifically recommended for demanding environmental conditions. The glass-glass construction provides high resistance to salt mist, making it a sound choice for coastal installations. Resistance to ammonia means the modules also perform reliably in the vicinity of animal farming facilities, where fumes can rapidly degrade traditional panels with polymer backsheets. ### What is the maximum power output of the Bruk-Bet OPTIMAL EDGE Glass-Glass panel, and why does N-type cell technology matter? Variants within the series reach a maximum power output of 480 Wp. Monocrystalline N-type cells offer higher conversion efficiency and a more favorable temperature coefficient compared to widely used P-type PERC cells. This means the panel loses less output on hot days, and more electrical energy can be produced from the same roof area. ### Is Bruk-Bet OPTIMAL EDGE Glass-Glass manufactured in Poland, and does that matter when making a purchasing decision? Yes, Bruk-Bet is a Polish company headquartered in Poland, which translates into shorter supply chains and easier access to warranty service. For investors, this means faster handling of any warranty claims without the delays associated with coordinating with an Asian manufacturer. The Polish origin of the product is backed by rigorous mechanical and durability testing carried out on-site. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Optimal-Edge-Glass-Glass-karta-produktowa-PEM-GB-480-6ea86d44b6e7.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +30 W, cooler, +2.8 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +2.6 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +25 W, cooler, +2.5 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, lighter, +2.3 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, lighter, +2.3 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | Cooler, lighter, +2.3 pp | | [Bruk-Bet PEM.GB-470 N-Type](https://comparepv.com/panel/bruk-bet-pem-gb-470-n-type) | 470 W | -10 W, -0.5 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +80 W, cooler, +2.6 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +75 W, cooler, +2.4 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | +70 W, lighter, +2.2 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | +60 W, cooler, +2.2 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | +60 W, cooler, +2.2 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | +65 W, cooler, +2.1 pp | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | +65 W, cooler, +2.0 pp | --- Source: https://comparepv.com/panel/bruk-bet-pem-gb-480 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.