--- title: "Bruk-Bet PEM.BB-405 405W Solar Panel - Specs & Review | ComparePV" description: "Bruk-Bet PEM.BB-405 405W solar panel. Specs: 20.51% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/bruk-bet-pem-bb-405" updated: 2026-09-11 --- # Bruk-Bet PEM.BB-405 Strong in heat, no clear weak spot 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** Bruk-Bet - **Model:** PEM.BB-405 - **Series:** PEM.BB-405 Half-Cell - **Rated power:** 405 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 400-450 W (954 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 405 W | 410 W | Typical | | | Module efficiency | 20.51% | 20.60% | Typical | 11,268 | | Power density | 205.1 | 206.2 | Typical | 11,315 | | Temperature coefficient | -0.324 | -0.350 | Strong - top 7% | 8,509 | | Weight (kg) | 21.5 kg | 22.0 kg | Typical | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.51% | 20.60% | Typical | 11,268 | | Power density | 205.1 | 206.2 | Typical | 11,315 | | Temperature coefficient | -0.324 | -0.350 | Strong - top 7% | 8,509 | | Weight per kWp | 53.1 | 53.0 | Typical | 6,847 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Strengths - **-0.324 %/°C temperature coefficient** - Top 7% of the PERC 400-450 W segment, against a median of -0.350. Ranked 8,509th in the whole database. - **Best for:** Residential, commercial and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 405 W - **Efficiency:** 20.51 % - **Voltage at Pmax (Vmp):** 31.13 V - **Current at Pmax (Imp):** 13.01 A - **Open-circuit voltage (Voc):** 37.09 V - **Short-circuit current (Isc):** 13.63 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 ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 108 ### Physical - **Length:** 1735 mm - **Width:** 1138 mm - **Thickness:** 40 mm - **Weight:** 21.5 kg - **Area:** 1.97 m2 - **Power density:** 205.1 Wp/m2 ### Warranty and degradation - **Product warranty:** 20 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 83.0 % - **Output after 30 years:** 323 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 11268 of 14005 | | Power density | 11315 of 14005 | | Temperature coefficient | 8509 of 14005 | | Weight | 6847 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Domestic Manufacturing and After-Sales Support** - The Tarnów facility (commissioned 2011, operated by a company with 40 years of construction industry experience) enables warranty claims and module replacements to be handled directly with the domestic manufacturer — no import intermediary involved. A nationwide network of authorized partners translates into materially faster service response times compared to Asian-based manufacturers. - **Triple-Stage Electroluminescence Testing** - Bruk-Bet is among a small number of manufacturers worldwide to perform EL inspection at three discrete stages: individual cell, half-module, and finished module. The industry standard is a single end-of-line test, making this series' QC procedure significantly more effective at detecting microcracks that would otherwise go undetected during a one-time inspection. - **20-Year Product Warranty** - The workmanship warranty covers manufacturing defects for 20 years when installed by an authorized partner, compared to the industry standard of 10–12 years applied by most Tier-1 manufacturers (VSUN offers 12 years; Goldi Solar's standard term is 10 years). The 25-year power output warranty is in line with the premium market benchmark. - **High Resistance to PID and LID** - The series is rated for resistance to both Potential Induced Degradation (PID) and Light Induced Degradation (LID), which — combined with PERC technology — limits first-year power degradation to below 2%. This is particularly relevant in systems operating at high DC voltages (1,000–1,500 V DC). ## Cons - **PERC Technology in Decline** - P-type PERC cells are approaching their theoretical efficiency ceiling (~24.5%) and are losing market share: TOPCon already accounts for ~50% of global module production and is forecast to reach 60% by 2030, with PERC projected at a -10.8% CAGR from 2025 to 2030. N-type TOPCon modules from competing products in the same price segment are estimated to deliver approximately 1.5–2.5% more energy per year under identical conditions. - **Efficiency Below Peer Comparables** - The 20.51% module efficiency is lower than all three comparable 405 W models: Goldi Solar GS10-M108-BF (20.66%), EGing STAR SERIES (20.74%), and VSUN405-108BMH-DG (20.74%). The 0.23 percentage-point gap versus the most efficient alternatives effectively requires greater roof area to achieve the same system peak power output. - **Monofacial Design vs. Bifacial Peer Models** - The module is monofacial (is\_bifacial: false), whereas the directly comparable VSUN405-108BMH-DG — in the same power class and price range — is a bifacial panel. Under typical ground-mount or light-colored rooftop installation conditions, bifacial gain from the rear side amounts to +5–15% additional energy yield, making the PEM.BB-405 less competitive for commercial and utility-scale applications. ## About this series Bruk-Bet PEM.BB-405 Half-Cell photovoltaic panels are an advanced solution based on **half-cell technology**, which effectively minimizes energy losses resulting from partial shading and internal resistance. Thanks to the precise division of the module into two independent sections, the system generates stable yields even in difficult weather conditions, making it significantly more efficient than traditional designs. This series stands out on the market due to a rigorous quality process, including **triple electroluminescence testing**, which ensures the absence of structural defects and micro-cracks affecting cell longevity. The modules solve the problem of power degradation over time thanks to **high resistance to the PID effect** and the LID phenomenon, providing investors with financial security for decades. The frame design has been optimized for **exceptional mechanical strength**, allowing for installation in regions with heavy snowfall and strong wind gusts. This is a product dedicated to single-family home owners and enterprises that prioritize **uncompromising Polish quality** and want to avoid risks associated with imported components of uncertain origin. By choosing the PEM.BB-405 series, the user receives a product fully adapted to European standards, combining high efficiency with an aesthetic finish. ## Notable figures - At 20.5% efficiency, this panel is on par with typical \*\*PERC 400-450W\*\* modules - At 205.1 W/m² power density, roof space requirements are typical for \*\*PERC 400-450W\*\* panels - -0.32%/°C temperature coefficient (median: -0.35%/°C) - retains ~1% more power at high temperatures - Ranked #11268 out of 14005 panels for efficiency in the database ## Questions ### Is the Bruk-Bet PEM.BB-405 Half-Cell series still available for purchase? The PEM.BB-405 Half-Cell series has been discontinued and is no longer actively offered by Bruk-Bet. Availability at installer distributors may be limited to existing stock. If you are looking for a current equivalent with similar specifications, it is worth considering newer series from the same manufacturer's Perfect Edge Pro or Optimal Edge lines, which offer higher power output and updated warranty terms. ### What warranty coverage applies to the Bruk-Bet PEM.BB-405 Half-Cell panels? The manufacturer provided a 20-year product warranty on the module covering material and workmanship defects, along with a 25-year linear power output warranty guaranteeing that the panel retains a specified minimum efficiency level throughout that period. For the 405 Half-Cell series, this represents one of the longer warranty standards among modules available on the domestic market, further supported by Bruk-Bet's in-country warranty service. ### What are the practical benefits of half-cell technology in the PEM.BB-405 series? Splitting standard PERC cells in half reduces the current flowing through each cell, which directly lowers resistive losses and decreases module operating temperature. In practice, this translates to improved performance at elevated temperatures and reduced sensitivity to partial shading caused by, for example, a chimney, antenna, or gutter rail. The module maintains more stable power output compared to conventional full-cell designs. ### Is the Bruk-Bet PEM.BB-405 panel resistant to the PID effect and LID degradation? Yes, the PEM.BB-405 Half-Cell series demonstrates high resistance to both Potential Induced Degradation (PID) and Light Induced Degradation (LID). Certifications in this regard were issued by the independent testing laboratory KIWA. As a result, module power degrades significantly more slowly in high-voltage systems and during the initial hours of exposure to sunlight, leading to more accurate real-world energy yield projections over the full service life. ### Can the Bruk-Bet PEM.BB-405 Half-Cell panels withstand heavy snow and wind loads? Yes, the aluminum frame of the PEM.BB-405 module was engineered for enhanced mechanical strength. Panels in this series have passed static load tests in accordance with European standards, making them suitable for installation in regions of Poland with heavy snowfall and high wind exposure. Prior to mounting, it is nevertheless advisable to consult your installer regarding the allowable load ratings of the specific racking structure being used. ### Is the Bruk-Bet PEM.BB-405 Half-Cell panel suitable for a residential rooftop installation on a pitched roof? Yes, the 405 Wp PERC half-cell module is well suited for typical prosumer installations on pitched roofs covered with roof tiles or metal roofing. For a single-family home with an annual energy consumption of 4,000–5,000 kWh, 8 to 12 modules are generally required. It is worth noting that this series has been discontinued, so when designing the system and planning any future capacity expansion, it will be more practical to work with currently manufactured Bruk-Bet models. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Perfect-Edge-Pro-PEMBB-405-f882c0cee3fd.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-455-MAH54Db](https://comparepv.com/panel/aiko-aiko-455-mah54db) | 455 W | +50 W, cooler, +2.8 pp | | [Longi Solar LR5-54HTH-455M](https://comparepv.com/panel/longi-lr5-54hth-455m) | 455 W | +50 W, cooler, +2.8 pp | | [Yingli YL455CF54 e/2](https://comparepv.com/panel/yingli-yl455cf54-e-2) | 455 W | +50 W, +2.8 pp, +5 yr warranty | | [Einnova Solarline ESM-455T](https://comparepv.com/panel/einnova-solarline-esm-455t) | 455 W | +50 W, +2.8 pp, +5 yr warranty | | [SunEvo Solar SE5-54HBC-455W](https://comparepv.com/panel/sunevo-solar-se5-54hbc-455w) | 455 W | +50 W, cooler, +2.8 pp | | [Just Solar JST-EDMH-(445-465)W-TD (455W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-455w-class) | 455 W | +50 W, +2.8 pp, +5 yr warranty | | [Luxor Solar LX-455M/182R-96+ GG](https://comparepv.com/panel/luxor-lx-455m-182r-96-gg) | 455 W | +50 W, cooler, +2.8 pp | | [Bruk-Bet PEM.BB-400](https://comparepv.com/panel/bruk-bet-pem-bb-400) | 400 W | -0.2 pp | | [Bruk-Bet PEM.WB-410](https://comparepv.com/panel/bruk-bet-pem-wb-410) | 410 W | +0.3 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +105 W, cooler, +4.5 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +90 W, cooler, +4.3 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +100 W, cooler, +4.2 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +85 W, cooler, +4.0 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +95 W, cooler, +4.0 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +95 W, cooler, +4.0 pp | --- Source: https://comparepv.com/panel/bruk-bet-pem-bb-405 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.