--- title: "Bruk-Bet PEM.BB-370 HALF-CELL 370W Solar Panel - Specs & Review | ComparePV" description: "Bruk-Bet PEM.BB-370 HALF-CELL 370W solar panel. Specs: 20.50% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/bruk-bet-fotowoltaika-bruk-bet-sp-z-o-o-pem-bb-370-half-cell" updated: 2026-09-11 --- # Bruk-Bet PEM.BB-370 HALF-CELL Strong in heat, no clear weak spot 579 panels in the segment PERC 350-400 W ## Identity - **Manufacturer:** Bruk-Bet - **Model:** PEM.BB-370 HALF-CELL - **Series:** PEM.BB - **Rated power:** 370 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 350-400 W (579 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 370 W | 380 W | Typical | | | Module efficiency | 20.50% | 19.90% | Strong - top 10% | 11,308 | | Power density | 202.1 | 199.0 | Typical | 11,965 | | Temperature coefficient | -0.324 | -0.350 | Strong - top 5% | 8,509 | | Weight (kg) | 20.0 kg | 21.4 kg | Typical | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.50% | 19.90% | Strong - top 10% | 11,308 | | Power density | 202.1 | 199.0 | Typical | 11,965 | | Temperature coefficient | -0.324 | -0.350 | Strong - top 5% | 8,509 | | Weight per kWp | 54.1 | 55.8 | Typical | 8,267 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Strengths - **-0.324 %/°C temperature coefficient** - Top 5% of the PERC 350-400 W segment, against a median of -0.350. Ranked 8,509th in the whole database. - **20.50% module efficiency** - Top 10% of the PERC 350-400 W segment, against a median of 19.90%. - **Best for:** Residential, commercial and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 370 W - **Efficiency:** 20.50 % - **Voltage at Pmax (Vmp):** 34.78 V - **Current at Pmax (Imp):** 10.65 A - **Open-circuit voltage (Voc):** 41.42 V - **Short-circuit current (Isc):** 11.13 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.324 %/degC - **Temperature coefficient of Voc:** -0.259 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 120 ### Physical - **Length:** 1760 mm - **Width:** 1040 mm - **Thickness:** 40 mm - **Weight:** 20.0 kg - **Area:** 1.83 m2 - **Power density:** 202.1 Wp/m2 ### Warranty and degradation - **Product warranty:** 20 years - **Performance warranty:** 25 years ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 11308 of 14005 | | Power density | 11965 of 14005 | | Temperature coefficient | 8509 of 14005 | | Weight | 8267 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **20.5% Efficiency — Class Leader at 370 Wp** - Compared to peer comparables, PEM.BB stands out clearly: Silfab Prime NTC reaches 18.7%, Solitek SOLRIF N Terracota Bronze 18.34%, and even Aptos Solar DNA 120 tops out at 20.29%. The 1.8–2.2 percentage-point advantage over most competitors translates into meaningfully higher energy yield from the same roof area. - **Triple EL Testing on 100% of Modules** - Every module undergoes three electroluminescence inspections before leaving the factory, eliminating units with cell microcracks. This is a standard rarely applied by mass-market manufacturers — most perform EL testing on a sample basis or only once. - **Swiss Meyer Burger Production Line** - Since 2017, Bruk-Bet has operated Meyer Burger equipment (stringers, laminators, and solar simulators), ensuring precision half-cut processing under a low-temperature thermal regime that minimizes mechanical stress in the cells during manufacturing. - **Polish Manufacturing — Local Warranty Support** - The Tarnów facility (in operation since 2011) enables direct, Polish-language communication with the manufacturer and faster warranty claim resolution compared to Asian suppliers. This is particularly relevant when the original installer is no longer in business. - **Hail Resistance 55 mm / 33.9 m/s (KIWA Certified)** - Independent testing by Italian institute KIWA confirms resistance to hailstones 55 mm in diameter at an impact velocity of 33.9 m/s — exceeding the IEC 61215 requirement of 25 mm / 23 m/s. The certification also covers resistance to PID, LID, ammonia, and salt mist. ## Cons - **PERC Technology — Not N-Type TOPCon/HJT** - The series launched in 2021 with P-type PERC cells, while the market shifted rapidly toward N-type TOPCon and HJT between 2023 and 2025. N-type cells exhibit a lower LID degradation rate (~0.1% vs. ~0.3% per year for PERC) and better high-temperature performance, meaning that at the same rated power of 370 Wp, competing modules built on newer technology may deliver higher real-world energy yield. - **Single Power Class (370 Wp)** - The PEM.BB series is available in 370 Wp only, limiting system design flexibility — both for small rooftops that would benefit from lower-wattage modules and for commercial installations where 400–450+ Wp modules have become the norm. The absence of additional variants complicates MPPT string optimization. ## About this series The PEM.BB series was designed for installations where reliable yield and resilience to real working conditions are key. These are monocrystalline modules featuring **half-cut technology with PERC cells**, minimizing power losses and performing better under partial shading and uneven string loads. They are distinguished by the **anti-reflective coating (ARC)**, which enhances light utilization in less-than-ideal weather conditions, effectively supporting more predictable energy production throughout the year. Worth noting is the quality control - modules undergo a **triple electroluminescence test**, helping detect micro-cracks before they reach the roof. The series is also designed for demanding locations: high wind resistance, mechanical loads, hail resistance, and **resistance to the PID effect** enhance investment safety. PEM.BB is an excellent choice for homes, businesses, and farms where longevity, the aesthetic appeal of black variants, and reliable operation for years are crucial. ## Notable figures - Efficiency of 20.5% is 1.1pp above the \*\*PERC 0-400W\*\* median (19.4%) - Power density of 202.1 W/m² packs 7.7 W/m² more into the same footprint vs \*\*PERC 0-400W\*\* median (194.4 W/m²) - -0.32%/°C temperature coefficient (median: -0.36%/°C) - retains ~1% more power at high temperatures - In the top 81% for efficiency among all PERC panels ## Questions ### What warranty is provided with the Bruk-Bet PEM.BB panels? The PEM.BB series comes with a 20-year product warranty and a 25-year linear power output warranty. This means the manufacturer guarantees that energy yield will remain above specified thresholds for 25 years. For both residential and commercial installations, this is a significant assurance, as the risk of a sharp efficiency decline during the typical return-on-investment period is substantially mitigated. ### Do the Bruk-Bet PEM.BB panels perform well under partial shading conditions, such as from a chimney or dormer windows? Yes. The PEM.BB modules employ half-cut cell technology, in which each cell is divided in half and wired into independent sub-circuits. As a result, shading on one section of the panel — for example, cast by a chimney or antenna — limits output only from that segment rather than disabling the entire module. Combined with PERC cells, which harvest diffuse light more efficiently, the series delivers noticeably better performance than conventional full-cell modules under non-uniform irradiance conditions. ### Is the Bruk-Bet PEM.BB a Polish-manufactured panel, and does that matter when making a purchasing decision? Yes, Bruk-Bet Fotowoltaika is a Polish manufacturer headquartered in Poland and active in the PV industry since 2011. For the buyer, this translates into a shorter service chain and easier direct contact in the event of a warranty claim, without the need to mediate through an overseas manufacturer. The modules undergo triple electroluminescence (EL) testing, which further reduces the risk of purchasing units with hidden microcracks in the cells. ### What is the peak power output of the Bruk-Bet PEM.BB panel, and is it sufficient for a typical single-family home? The maximum rated power in this series is 370 Wp. For an average single-family home consuming approximately 4,000–5,000 kWh per year, a typical installation requires 10 to 14 modules, yielding a system capacity of 3.7–5.2 kWp. The exact number of panels depends on the geographic location, roof orientation and tilt, and the household's individual energy consumption profile. ### Are the Bruk-Bet PEM.BB panels resistant to high winds and hail? Yes. The PEM.BB series is engineered for demanding weather conditions. The modules are certified to high mechanical load ratings for both snow and wind, and are tested to withstand hailstone impacts at a diameter of 55 mm traveling at speeds exceeding 120 km/h. Built-in PID (Potential Induced Degradation) resistance provides an additional layer of protection against cell degradation caused by electrical leakage within the installation. ### What distinguishes the Bruk-Bet PEM.BB series from models without the BB designation? The BB designation in the series name indicates a Full Black or Black Frame variant — a module featuring a black anodized frame and a black backsheet. This delivers a uniform, visually refined appearance that is preferred on exposed roof surfaces and in architectural projects with elevated aesthetic requirements. In terms of electrical performance and cell technology — including PERC half-cut cells and an anti-reflective coating (ARC) — the series remains consistent with the manufacturer's other product lines. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Perfect-Edge_PEMBB-370-504809ca4e5e.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | -40 W, lighter, +2.6 pp | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | -40 W, lighter, +2.6 pp | | [Gamko New Energy GKA210M320W](https://comparepv.com/panel/gamko-new-energy-gka210m320w) | 320 W | -50 W, +2.5 pp, +5 yr warranty | | [Gamko New Energy GKA210M340W](https://comparepv.com/panel/gamko-new-energy-gka210m340w) | 340 W | Lighter, +2.5 pp, +5 yr warranty | | [Gamko New Energy GKA210M360W](https://comparepv.com/panel/gamko-new-energy-gka210m360w) | 360 W | Lighter, +2.5 pp, +5 yr warranty | | [Gamko New Energy GKA210M380W (1/4\*4\*38)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-4-4-38) | 380 W | Lighter, +2.5 pp, +5 yr warranty | | [Gamko New Energy GKA210M400W (1/2\*4\*20)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-2-4-20) | 400 W | +30 W, +2.5 pp, +5 yr warranty | | [Gamko New Energy GKA210M400W (1/4\*4\*40)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-4-4-40) | 400 W | +30 W, +2.5 pp, +5 yr warranty | | [Gamko New Energy GKA210M380W (1/2\*4\*19)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-2-4-19) | 380 W | Lighter, +2.5 pp, +5 yr warranty | | [Maxeon SPR-MAX3-400-COM](https://comparepv.com/panel/maxeon-spr-max3-400-com) | 400 W | Cooler, +2.1 pp, +15 yr warranty | | [Bruk-Bet BEM 375 W](https://comparepv.com/panel/bruk-bet-bem-375-w) | 375 W | Very close match | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +140 W, cooler, +4.5 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +125 W, cooler, +4.3 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +135 W, cooler, +4.2 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +120 W, cooler, +4.0 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +130 W, cooler, +4.0 pp | --- Source: https://comparepv.com/panel/bruk-bet-fotowoltaika-bruk-bet-sp-z-o-o-pem-bb-370-half-cell Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.