--- title: "Axitec AC-445TGBL/108WB 445W Solar Panel - Specs & Review | ComparePV" description: "Axitec AC-445TGBL/108WB 445W solar panel. Specs: 22.27% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/axitec-ac-445tgbl-108wb" updated: 2026-09-11 --- # Axitec AC-445TGBL/108WB Middle of its segment, weak in heat 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** Axitec - **Model:** AC-445TGBL/108WB - **Series:** AXIbiperfect GL WB - **Rated power:** 445 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 400-450 W (1218 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 445 W | 435 W | Strong - top 8% | | | Module efficiency | 22.27% | 22.00% | Typical | 5,481 | | Power density | 222.7 | 220.2 | Typical | 5,302 | | Temperature coefficient | -0.310 | -0.290 | Weak - bottom 10% | 8,005 | | Weight (kg) | 25.0 kg | 22.0 kg | Weak - bottom 22% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.27% | 22.00% | Typical | 5,481 | | Power density | 222.7 | 220.2 | Typical | 5,302 | | Temperature coefficient | -0.310 | -0.290 | Weak - bottom 10% | 8,005 | | Weight per kWp | 56.2 | 51.4 | Weak - bottom 22% | 10,457 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **-0.310 %/°C temperature coefficient** - Bottom 10% of the TOPCon 400-450 W segment, against a median of -0.290. - **56.2 kg per kWp** - Bottom 22% of the TOPCon 400-450 W segment, against a median of 51.4. - **Best for:** Residential, commercial, shaded-installations and hot-climate. - **Not ideal for:** Hot climates and weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 445 W - **Efficiency:** 22.27 % - **Voltage at Pmax (Vmp):** 32.99 V - **Current at Pmax (Imp):** 13.49 A - **Open-circuit voltage (Voc):** 39.70 V - **Short-circuit current (Isc):** 14.19 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.310 %/degC - **Temperature coefficient of Voc:** -0.260 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 108 - **Bifacial:** yes - **Bifacial gain:** 30.00 ### Physical - **Length:** 1762 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 25.0 kg - **Area:** 2.00 m2 - **Power density:** 222.7 Wp/m2 ### Warranty and degradation - **Product warranty:** 30 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 389 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 5481 of 14005 | | Power density | 5302 of 14005 | | Temperature coefficient | 8005 of 14005 | | Weight | 10457 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Efficiency Above Peer Comparables** - The series reaches a peak module efficiency of 23.27%, outperforming comparable models such as the DAH DHN-54R18/DG(BW) (22.78%) and JS Solar / Jinko JS182MHC120 (21.48%). Higher yield per m² translates directly into a smaller roof or ground area required to achieve the same system output. - **Low Temperature Coefficient — N-type TOPCon** - The N-type TOPCon cells deliver a power temperature coefficient of -0.31%/°C, outperforming typical PERC modules (-0.34 to -0.36%/°C). Under Central European summer conditions — with module temperatures reaching 30–40°C — this advantage results in measurably higher energy yield during peak-generation months. - **30-Year Linear Power Warranty: 87.4% Pnom** - The manufacturer guarantees a minimum of 87.4% of nominal power output after 30 years of operation under a linear degradation schedule. The mainstream market standard is 25 years with a guaranteed threshold of approximately 84.8%, making this warranty a meaningful advantage in LCOE calculations. - **Glass-Glass Construction with IP68 and Reduced PID Risk** - The glass-glass enclosure — featuring a 2 mm AR-coated tempered glass front and 2 mm tempered glass rear — combined with IP68 hermetic sealing eliminates moisture ingress and reduces the risk of EVA corrosion. The manufacturer's datasheet states a reduced risk of Potential-Induced Degradation (PID) compared to modules using polymer backsheets. - **Bifacial Design with White Cell Interspacing** - Bifacial cells paired with white inter-cell spacing maximize capture of diffuse and reflected irradiance. The manufacturer claims up to 30% additional energy production from the rear side on high-albedo surfaces, including light-colored flat rooftops and ground-mounted systems with appropriate ground cover. ## Cons - **Not Listed as BNEF Tier 1** - Axitec does not appear on the BloombergNEF Tier 1 module manufacturer list (Q1 2026) and is classified as a Tier 2 supplier. For commercial projects financed through bank loans or leasing arrangements, this status may complicate module acceptance, as lenders typically require Tier 1 manufacturers as a condition of financing. - **Fire Class C — Not Class A** - The official datasheet confirms a fire resistance rating of Class C. Installations on multi-family residential buildings or facilities subject to stringent fire safety regulations — such as structures in close proximity to adjacent buildings — may require Class A-rated modules, potentially disqualifying this series from certain tenders and institutional projects. ## About this series The Axitec AXIbiperfect GL WB series are bifacial glass-glass modules based on N-Type TOPCon cells in a half-cell configuration - designed for high energy production even when roof conditions are not ideal. Thanks to their bifacial design, the modules can utilize reflected light from the ground, which effectively increases energy yield in installations on bright roofs, flat roofs, and ground-mounted structures. The **glass-glass** construction improves resistance to moisture and material aging, as well as supports long-term parameter stability. The use of **N-Type TOPCon technology** ensures better performance at higher temperatures and reduced susceptibility to typical degradation losses seen in older solutions. The characteristic, refined appearance - including white spaces between cells and a black frame - facilitates aesthetic installation. This is a good choice for investors who expect **high energy yield per square meter**, **durability**, and predictable performance in residential and commercial installations. ## Notable figures - At 22.3% efficiency, this panel is on par with typical \*\*TOPCon 400-450W\*\* modules - At 222.7 W/m² power density, roof space requirements are typical for \*\*TOPCon 400-450W\*\* panels - At -0.31%/°C, loses 0.02pp more power per degree than \*\*TOPCon 400-450W\*\* median (-0.29%/°C) - Weight of 25.0 kg is 3.0 kg above \*\*TOPCon 400-450W\*\* median (22.0 kg) - verify structural support - Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface ## Questions ### What warranty does Axitec offer on the AXIbiperfect GL WB series? Axitec provides an industry-leading 30-year product warranty and a 30-year power output warranty on the AXIbiperfect GL WB series. This places it among the longest warranty standards currently available on the market. The power warranty guarantees retention of at least 87.4% of nominal output after 30 years — a performance level made possible by the durable glass-glass construction and the inherently low-degradation N-Type TOPCon cell technology. ### What does bifaciality mean in the context of the Axitec AXIbiperfect GL WB, and does it genuinely increase energy yield? Bifaciality means the module harvests energy from both sides — from the front glass as well as from the rear glass, which collects irradiance reflected from the ground or rooftop surface below. For the AXIbiperfect GL WB, Axitec states up to 30% additional power gain from the rear side. The effect is most pronounced on high-albedo surfaces such as flat roofs with white TPO/PVC membranes and ground-mounted installations — under such conditions, real-world yield noticeably exceeds the nameplate rating of 465 Wp. ### Is the Axitec AXIbiperfect GL WB suitable for a pitched roof on a single-family home? Yes, the AXIbiperfect GL WB series is fully compatible with standard racking systems designed for pitched roofs. The module features a black aluminum frame with white cell spacing, which integrates well aesthetically on a typical residential roofscape. The half-cut cell layout with 108 cells improves resilience to partial shading caused by chimneys, dormers, or other roof obstructions — a meaningful advantage in residential installations where shading is difficult to eliminate entirely. ### How does the N-Type TOPCon cell technology in the AXIbiperfect GL WB compare to older P-Type panels? N-Type TOPCon cells exhibit a lower temperature coefficient (approximately -0.31%/°C), which translates to smaller power losses during high-temperature conditions compared to conventional P-Type PERC modules. They are also significantly less susceptible to light-induced degradation (LID), resulting in more predictable and stable output across the full 30-year warranty period. For the end user, the practical outcome is more kilowatt-hours generated annually for the same installed nameplate capacity. ### Why does the Axitec AXIbiperfect GL WB use glass-glass construction instead of a traditional backsheet? The glass-glass construction replaces the conventional polymer backsheet with a second pane of tempered glass, substantially improving resistance to moisture ingress, ammonia exposure, and harsh environmental conditions. As a result, the module degrades more slowly — both mechanically and electrochemically — and the laminate maintains superior hermeticity throughout the system's lifetime. This structural durability is the primary reason Axitec is able to back the series with a 30-year product warranty. ### Is Axitec a reputable manufacturer, and is the brand a safe choice from a warranty perspective? Axitec is a Germany-based company that has been active in the photovoltaic market since 2009, with distribution focused primarily on the European market. While it does not appear on the official Bloomberg NEF Tier 1 module manufacturer list, its products are distributed through numerous established partners across Poland and Europe. Given the 30-year warranty commitment, it is advisable to ensure at the point of purchase that the modules are sourced from an authorized distributor who can act as an intermediary in the event of any warranty claim. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/DB_108zlg_biperfect_GL_WB_MiA_EN-7333d8a0fd04.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +50 W, cooler, +2.5 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +45 W, cooler, +2.2 pp | | [Suntech STP-NT11/48QGSF-490](https://comparepv.com/panel/suntech-stp-nt11-48qgsf-490) | 490 W | +45 W, cooler, +2.2 pp | | [JA Solar JAT54S40-485/LR](https://comparepv.com/panel/ja-solar-jat54s40-485-lr) | 485 W | Cooler, lighter, +2.0 pp | | [AIKO AIKO-A485-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a485-mce54mw) | 485 W | +40 W, cooler, +2.0 pp | | [Longi Solar LR7-54HJD-495M](https://comparepv.com/panel/longi-lr7-54hjd-495m) | 495 W | +50 W, cooler, +2.0 pp | | [AIKO AIKO-A485-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a485-mah54mw) | 485 W | +40 W, cooler, +2.0 pp | | [Axitec AC-440TGBL/108BB](https://comparepv.com/panel/axitec-ac-440tgbl-108bb) | 440 W | -0.2 pp | | [Axitec AC-450TGBL/108BB](https://comparepv.com/panel/axitec-ac-450tgbl-108bb) | 450 W | +0.2 pp | | [Axitec AC-455TGBL/108BB](https://comparepv.com/panel/axitec-ac-455tgbl-108bb) | 455 W | +10 W, +0.5 pp | | [Axitec AC-460TGBL/108WB](https://comparepv.com/panel/axitec-ac-460tgbl-108wb) | 460 W | +15 W, +0.8 pp | | [Axitec AC-465TGBL/108WB](https://comparepv.com/panel/axitec-ac-465tgbl-108wb) | 465 W | +20 W, +1.0 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +65 W, cooler, +2.7 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +60 W, cooler, +2.4 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +55 W, cooler, +2.2 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +55 W, cooler, +2.2 pp | --- Source: https://comparepv.com/panel/axitec-ac-445tgbl-108wb 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.