---
title: "Axitec AC-455TGB/108WB 455W Solar Panel - Specs & Review | ComparePV"
description: "Axitec AC-455TGB/108WB 455W solar panel. Specs: 22.29% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient."
source: "https://comparepv.com/panel/axitec-ac-455tgb-108wb"
updated: 2026-09-11
---

# Axitec AC-455TGB/108WB

Middle of its segment, weak in heat

1,089 panels in the segment TOPCon 450-500 W


## Identity

- **Manufacturer:** Axitec
- **Model:** AC-455TGB/108WB
- **Series:** AXIbiperfect GR WB
- **Rated power:** 455 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) | 455 W | 465 W | Typical |  |
| Module efficiency | 22.29% | 22.52% | Typical | 5,376 |
| Power density | 222.9 | 225.2 | Typical | 5,100 |
| Temperature coefficient | -0.310 | -0.290 | Weak - bottom 6% | 8,005 |
| Weight (kg) | 25.3 kg | 24.0 kg | Weak - bottom 10% |  |
| Performance warranty | 30 yrs | 30 yrs | Typical | 21 |


### Full peer table


| Measure | This panel | Segment median | Standing | Rank |
| --- | --- | --- | --- | --- |
| Module efficiency | 22.29% | 22.52% | Typical | 5,376 |
| Power density | 222.9 | 225.2 | Typical | 5,100 |
| Temperature coefficient | -0.310 | -0.290 | Weak - bottom 6% | 8,005 |
| Weight per kWp | 55.6 | 52.2 | Weak - bottom 10% | 9,988 |
| 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 10% of the TOPCon 450-500 W segment, against a median of 52.2.

- **Best for:** Residential and commercial.
- **Not ideal for:** Hot climates and weight-limited structures.


## Specification


### Electrical

- **Rated power (Pmax):** 455 W
- **Efficiency:** 22.29 %
- **Voltage at Pmax (Vmp):** 32.98 V
- **Current at Pmax (Imp):** 13.80 A
- **Open-circuit voltage (Voc):** 39.68 V
- **Short-circuit current (Isc):** 14.51 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


### Physical

- **Length:** 1800 mm
- **Width:** 1134 mm
- **Thickness:** 30 mm
- **Weight:** 25.3 kg
- **Area:** 2.04 m2
- **Power density:** 222.9 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:** 398 W


## Rank in the whole catalogue


| Measure | Position |
| --- | --- |
| Efficiency | 5376 of 14005 |
| Power density | 5100 of 14005 |
| Temperature coefficient | 8005 of 14005 |
| Weight | 9988 of 14005 |
| Warranty | 21 of 14005 |


## Pros

- **N-type TOPCon Cells with Low Degradation** - N-type TOPCon technology exhibits a degradation rate of approximately 0.4% per year and a lower LID effect than legacy PERC cells, resulting in a guaranteed ≥87.4% of nominal power output after 30 years of operation — a parameter confirmed by the manufacturer's official datasheet.
- **Bifacial + Glass-Glass Construction = Higher Energy Yield** - The glass-glass construction enables energy generation from both sides of the module. On high-albedo surfaces (white membrane, gravel, light-colored concrete), the bifacial gain can reach 10–30% additional output compared to monofacial modules of the same nominal power, without increasing the installation footprint.
- **30-Year Product and Power Warranty** - Axitec offers a 30-year warranty on both the product and performance (linear degradation to 87.4% after 30 years), while the industry standard for most peer comparables (Zonergy, SunKean) is 25 years. The extended warranty directly improves project bankability and the long-term value of the installation.
- **WB Variant — Aesthetics and Visual Integration** - The white cell-gap background (white backsheet/glass) combined with a black frame enables visually cohesive installations on light-colored roofs or membranes, where a standard all-black panel creates excessive contrast. This is a meaningful advantage in the residential and commercial segment where architectural requirements apply.
- **Efficiency Up to 22.54% — Above Zonergy in the Segment** - The peak efficiency of 22.54% (460 Wp variant) clearly outperforms its direct peer — the Zonergy ZPM MH3-72 (21.16%) — translating to approximately 6.5% more energy output for the same module area. The efficiency is competitive, though marginally below the top-performing rivals in the comparison set.


## Cons

- **No BNEF Tier-1 Status** - Axitec does not appear on the BNEF Tier-1 list (confirmed as of Q1 2026), which may complicate or preclude non-recourse project financing. Risen Energy — a direct peer comparable in the comparison set — holds Tier-1 status, giving it a clear advantage for large ground-mounted installations financed through banks.
- **Efficiency Below Peer Group Leaders** - The peak efficiency of the GR WB series is 22.54%, while the Risen RSM96-11 reaches 23.0% and the SunKean SKT440–460 achieves 23.02%. The approximately 0.5 percentage point gap translates to roughly 2.2% less output per square meter, which carries real significance when roof space is constrained.


## About this series

The Axitec AXIbiperfect GR WB series are bifacial glass-glass modules designed to maximize energy yield in situations where every extra percentage counts - on bright roofs, on gravel, white membranes, or on ground with high albedo. The use of **N-Type TOPCon cells** helps minimize losses over time and maintain stable operation even under demanding solar conditions. A key advantage is **the technology of dual-sided generation**, which allows the module to utilize reflected light, resulting in improved production without increasing the footprint.

The GR WB variant stands out for its refined aesthetics and visual consistency - the white background between the cells makes installation easier in locations where the appearance of the installation is important. The **glass-glass** construction improves resistance to stress and environmental factors, and the **black frame** facilitates adaptation to modern roofs. This is a good choice for homes, businesses, and ground-mounted systems where durability, high yield, and predictable operation are priorities.


## Notable figures

- Efficiency of 22.3% matches the \*\*TOPCon 450-500W\*\* median
- At 222.9 W/m² power density, roof space requirements are typical for \*\*TOPCon 450-500W\*\* panels
- Temperature coefficient of -0.31%/°C is 0.02pp worse than \*\*TOPCon 450-500W\*\* median (-0.29%/°C) - higher losses in summer heat
- Weight of 25.3 kg is 1.3 kg above \*\*TOPCon 450-500W\*\* median (24.0 kg) - verify structural support
- Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface


## Questions


### What warranty is offered on the Axitec AXIbiperfect GR WB panels?

The AXIbiperfect GR WB series comes with a 30-year product warranty and a 30-year power output warranty. This is among the longest warranty coverage available in the photovoltaic module market, reflecting the manufacturer's confidence in the durability of the glass-glass construction and the long-term stability of N-Type TOPCon cells. Such an extended protection period translates into predictable return on investment throughout the entire operational lifetime of the installation.


### What does the GR WB designation in the Axitec AXIbiperfect series name mean?

GR WB identifies a specific variant within the AXIbiperfect series. The WB suffix stands for White Back, referring to the white backsheet appearance in the spaces between cells on the rear side of the module. The black frame (GR) provides an aesthetically cohesive look suited to modern rooftops. This variant therefore combines visual appeal with bifacial functionality, making it an attractive choice wherever the appearance of the installation matters.


### What additional energy yield can be expected from the bifacial design of the AXIbiperfect GR WB module?

The AXIbiperfect GR WB module generates power from both sides thanks to its bifacial technology built on N-Type TOPCon cells. The additional yield from the rear side depends on the albedo of the underlying surface and typically ranges from 5 to 20% compared to a monofacial installation. The highest gains are achieved in ground-mounted systems over white geomembrane, light-colored gravel, or highly reflective roofing surfaces. With a front-side rated power of 460 Wp, the effective system yield can therefore exceed 500 Wp under favorable conditions.


### Are the Axitec AXIbiperfect GR WB panels suitable for pitched roof installations?

Yes, AXIbiperfect GR WB modules are suitable for standard pitched roof installations. The 30 mm black frame and glass-glass construction are compatible with conventional racking and mounting systems. It is worth noting, however, that the full bifacial potential of these panels is better utilized in ground-mounted systems or on light-colored flat roofs, where the rear side of the module can capture reflected irradiance. On pitched roofs above dark roof tiles, the bifacial gain will be minimal.


### How does the N-Type TOPCon technology in the AXIbiperfect GR WB series differ from older PERC cells?

N-Type TOPCon cells exhibit a lower degradation rate and better performance at elevated temperatures compared to widely used P-Type PERC cells. The tunnel oxide passivation layer suppresses surface recombination losses, which results in a higher module efficiency of approximately 22.5%. The reduced year-over-year degradation means that after 30 years the panel produces proportionally more energy than an equivalent PERC module would under the same conditions.


### Is the Axitec AXIbiperfect GR WB a good choice for a ground-mounted utility-scale solar farm?

Yes, the AXIbiperfect GR WB series is particularly well suited for ground-mounted installations. The glass-glass construction provides high mechanical and environmental durability, while the bifacial N-Type TOPCon cells allow the system to harvest additional energy reflected from the ground surface — light-colored gravel or grass cover can deliver a measurable increase in energy production. The 460 Wp power rating and system voltage compatibility up to 1500 V enable the design of long strings, which simplifies the system architecture and reduces balance-of-system (BoS) wiring costs.


## Datasheet

[Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/DB-108zlg-biperfect-GR-WB-MiA-EN-2f8d4eb0ddb7.pdf)


## Alternatives


| Panel | Power | How it differs |
| --- | --- | --- |
| [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +2.5 pp |
| [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +50 W, cooler, +2.4 pp |
| [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, lighter, +2.2 pp |
| [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +45 W, cooler, +2.2 pp |
| [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +45 W, cooler, +2.2 pp |
| [Gokin GK-3-54HGb-500M](https://comparepv.com/panel/gokin-gk-3-54hgb-500m) | 500 W | +45 W, cooler, +2.2 pp |
| [Axitec AC-445TGB/108WB](https://comparepv.com/panel/axitec-ac-445tgb-108wb) | 445 W | -10 W, -0.5 pp |
| [Axitec AC-450TGB/108WB](https://comparepv.com/panel/axitec-ac-450tgb-108wb) | 450 W | -0.2 pp |
| [Axitec AC-460TGB/108WB](https://comparepv.com/panel/axitec-ac-460tgb-108wb) | 460 W | +0.2 pp |
| [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +55 W, cooler, +2.7 pp |


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Source: https://comparepv.com/panel/axitec-ac-455tgb-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.