--- title: "Axitec AC-450TGBL/108BB 450W Solar Panel - Specs & Review | ComparePV" description: "Axitec AC-450TGBL/108BB 450W solar panel. Specs: 22.52% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/axitec-ac-450tgbl-108bb" updated: 2026-09-11 --- # Axitec AC-450TGBL/108BB Middle of its segment, weak in heat 1,089 panels in the segment TOPCon 450-500 W ## Identity - **Manufacturer:** Axitec - **Model:** AC-450TGBL/108BB - **Series:** AXIblackbiperfect GL - **Rated power:** 450 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) | 450 W | 465 W | Weak - bottom 9% | | | Module efficiency | 22.52% | 22.52% | Typical | 4,108 | | Power density | 225.2 | 225.2 | Typical | 4,225 | | Temperature coefficient | -0.310 | -0.290 | Weak - bottom 6% | 8,005 | | Weight (kg) | 25.0 kg | 24.0 kg | Weak - bottom 11% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.52% | 22.52% | Typical | 4,108 | | Power density | 225.2 | 225.2 | Typical | 4,225 | | Temperature coefficient | -0.310 | -0.290 | Weak - bottom 6% | 8,005 | | Weight per kWp | 55.6 | 52.2 | Weak - bottom 11% | 9,909 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **-0.310 %/°C temperature coefficient** - Bottom 6% of the TOPCon 450-500 W segment, against a median of -0.290. Ranked 8,005th in the whole database. - **55.6 kg per kWp** - Bottom 11% of the TOPCon 450-500 W segment, against a median of 52.2. - **Best for:** Residential and hot-climate. - **Not ideal for:** Hot climates and weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 450 W - **Efficiency:** 22.52 % - **Voltage at Pmax (Vmp):** 33.24 V - **Current at Pmax (Imp):** 13.54 A - **Open-circuit voltage (Voc):** 39.98 V - **Short-circuit current (Isc):** 14.25 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:** 225.2 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:** 393 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 4108 of 14005 | | Power density | 4225 of 14005 | | Temperature coefficient | 8005 of 14005 | | Weight | 9909 of 14005 | | Warranty | 21 of 14005 | ## Pros - **22.02–23.02% Efficiency – Segment-Leading Performance** - The top-tier variant (460 Wp, 23.02%) matches the SunKean SKT440~460M12-96D4 (23.02%) and marginally outperforms the Risen RSM96-11 (23.00%), while surpassing the Zonergy ZPM MH3-72 by 1.86 percentage points (21.16%). Even the base 440 Wp variant (22.02%) places the series above the segment median. - **N-type TOPCon: Low Temperature Coefficient** - The datasheet-confirmed temperature coefficient of -0.31%/°C for Pmpp outperforms typical P-type PERC modules (-0.35 to -0.37%/°C), resulting in lower power losses on hot days. Degradation of ≤1% in the first year and ≤0.40%/year thereafter guarantees retention of >87.4% of rated power after 30 years of operation. - **30-Year Product and Power Warranty** - Axitec provides a full 30-year product warranty alongside a 30-year linear power warranty — a standard that exceeds the offering of many major players (Trina Solar, JA Solar) that stop at 25 years. With degradation of ≤0.40%/year, investors can accurately model energy yields over the full loan term. - **Glass-Glass Bifacial Construction – Durability and Additional Yield** - Dual 2.0 mm glass panes eliminate the risk of backsheet degradation (EVA yellowing), PID, and microcracks under extreme mechanical loads. Bifacial technology enables up to 30% additional energy yield (per manufacturer datasheet) in installations with high-albedo ground surfaces, such as white roofing membranes or gravel. - **Full Black Without Performance Compromise** - The series combines a full-black aesthetic (black cells, black cell gaps, black frame) with 22.02–23.02% efficiency — most lower-cost full-black solutions based on P-type PERC achieve only 20–21%. An optimal choice for premium residential applications where appearance is as important as performance. ## Cons - **No BNEF Tier-1 Status (Q1 2026)** - Axitec does not appear on the BNEF bankable Tier-1 list (confirmed for Q1 2026), unlike direct competitor Risen Energy. This may complicate the structuring of project finance for commercial installations >100 kWp, where financial institutions require Tier-1 status as a condition for lending. - **Higher Module Weight with Glass-Glass Construction (25 kg)** - Modules weigh 25 kg — approximately 10–15% more than comparable glass-backsheet variants (~21–22 kg, e.g., the Risen RSM96-11 in its standard version). For installations on older rooftops with limited load-bearing capacity, a prior structural engineering assessment is required, generating additional project costs. ## About this series The Axitec AXIblackbiperfect GL series represents a breakthrough combination of aesthetics and the highest energy efficiency, dedicated to the most demanding rooftop systems. The use of innovative **N-Type TOPCon cells** allows for achieving excellent performance parameters at high temperatures and a better response to diffused light, which guarantees stable yields throughout the year. A key differentiator is the double-sided **glass-glass** construction, which ensures extreme resistance to mechanical loads and aggressive environmental factors, eliminating the risk of rapid degradation. Thanks to the use of **bifacial technology**, these modules effectively utilize energy reflected from the ground, which significantly increases the total efficiency of the installation compared to traditional panels. Visually, the series impresses with its deep black **Full Black** standard, making the cells almost invisible against the roof covering. This is an ideal solution for investors looking for a premium product that combines fire safety with many years of reliability. By choosing these modules, you eliminate concerns about component durability, opting for technology resistant to the passage of time and changing weather conditions. This is the optimal choice for modern single-family homes, where every watt of power and perfect design matter. ## Notable figures - Efficiency of 22.5% matches the \*\*TOPCon 450-500W\*\* median - Power density of 225.2 W/m² matches the \*\*TOPCon 450-500W\*\* median - At -0.31%/°C, loses 0.02pp more power per degree than \*\*TOPCon 450-500W\*\* median (-0.29%/°C) - At 25.0 kg, weight matches the \*\*TOPCon 450-500W\*\* median - 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces ## Questions ### What warranty is offered on Axitec AXIblackbiperfect GL panels? The AXIblackbiperfect GL series comes with a 30-year product warranty and a 30-year power output warranty. The manufacturer guarantees that after 30 years of operation the module will retain more than 87.4% of its original rated power. Degradation is capped at a maximum of 1% in the first year and no more than 0.4% per year in subsequent years. This is one of the longest warranties currently available in the photovoltaic panel market. ### What advantages does N-Type TOPCon technology offer in the AXIblackbiperfect GL panels compared to conventional cells? N-Type TOPCon cells deliver higher efficiency of approximately 22%, improved performance at elevated operating temperatures, and significantly reduced susceptibility to LID (Light-Induced Degradation) during initial light exposure. In practice, this translates to greater annual energy yield compared to conventional P-Type PERC cells of the same rated power, particularly on overcast days and under diffuse irradiance conditions. ### How much additional energy can be gained from the bifacial design of the AXIblackbiperfect GL panels? Thanks to bifacial technology, the rear side of the module captures light reflected from the ground surface, rooftop, or surrounding environment. Axitec states an energy yield gain of up to 30% relative to a standard monofacial panel, though the actual gain depends on the albedo of the mounting surface and the installation tilt angle. The effect is most pronounced over white roofing membranes or light-colored gravel, while the gain is more modest on dark roofing substrates. ### Can Axitec AXIblackbiperfect GL panels withstand heavy snow loads and strong wind pressure? Yes, the glass-glass construction provides exceptional mechanical resilience. The modules are tested to withstand a front-side load of 5,400 Pa and a rear-side suction load of 2,400 Pa, corresponding to extreme weather conditions. The absence of a back-sheet eliminates the risk of delamination and microcracks caused by thermomechanical stress. This makes the AXIblackbiperfect GL series a reliable choice for both high-snowfall regions and high-wind locations. ### Does the AXIblackbiperfect GL series integrate aesthetically with modern rooftops, and what does it look like up close? The series is designed to a Full Black standard: black cells, black inter-cell spacing on the rear side, and a black anodized aluminum frame. As a result, the modules form a uniformly black surface that blends almost seamlessly with dark roofing materials. This solution is highly valued by owners of modern single-family homes and by architects who are unwilling to compromise between visual appearance and system performance. ### Is Axitec a trustworthy manufacturer, and how does warranty service work in Poland? Axitec is a German-headquartered brand that has been active in the photovoltaic market for over a decade. The company is not classified in the Bloomberg NEF Tier 1 ranking; however, its modules are distributed through a network of authorized distributors with a presence in Poland. Before purchasing, it is advisable to confirm that the selected installer or distributor provides support throughout the warranty claims process, as manufacturer warranty service is handled exclusively through official sales channels. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/DB_108zlg_blackbiperfect_GL_MiA_EN_2mm-1c4e7498860f.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +45 W, cooler, +2.3 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +40 W, cooler, +2.0 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +50 W, cooler, +2.0 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +50 W, cooler, +2.0 pp | | [Gokin GK-3-54HGb-500M](https://comparepv.com/panel/gokin-gk-3-54hgb-500m) | 500 W | +50 W, cooler, +2.0 pp | | [GCL GCL-NR10R/54BGDF](https://comparepv.com/panel/gcl-gcl-nr10r-54bgdf) | 500 W | +50 W, cooler, +2.0 pp | | [Axitec AC-440TGBL/108BB](https://comparepv.com/panel/axitec-ac-440tgbl-108bb) | 440 W | -10 W, -0.5 pp | | [Axitec AC-445TGBL/108BB](https://comparepv.com/panel/axitec-ac-445tgbl-108bb) | 445 W | -0.2 pp | | [Axitec AC-455TGBL/108BB](https://comparepv.com/panel/axitec-ac-455tgbl-108bb) | 455 W | +0.2 pp | | [Axitec AC-460TGBL/108WB](https://comparepv.com/panel/axitec-ac-460tgbl-108wb) | 460 W | +10 W, +0.5 pp | | [Axitec AC-465TGBL/108WB](https://comparepv.com/panel/axitec-ac-465tgbl-108wb) | 465 W | +15 W, +0.8 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +60 W, cooler, +2.5 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +55 W, cooler, +2.2 pp | --- Source: https://comparepv.com/panel/axitec-ac-450tgbl-108bb Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.