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Axitec Brand review

AC-450TGB/108WB

450 Wp TOPCon Bifacial 80%
ComparePV verdict

Middle of its segment, weak in heat

Rank 5,730 of 14,005
Compare panels Datasheet PDF
Power (Wp)
450
Weak · bottom 9%
Efficiency (%)
22.05
Weak · bottom 22%
Density (Wp/m²)
220.5
Weak · bottom 21%
Temp (%/°C)
-0.310
Weak · bottom 6%
Weight (kg)
25.3
Weak · 1.3 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

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.

Ranking

1,089 panels in the segment TOPCon 450-500 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.05% 22.52% Weak · bottom 22% 6,233
Power density 220.5 225.2 Weak · bottom 21% 6,236
Temperature coefficient -0.310 -0.290 Weak · bottom 6% 8,005
Weight per kWp 56.2 52.2 Weak · bottom 7% 10,501
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

5 positive · 5 caution
Best for

Residential and commercial.

Not ideal for

Hot climates, weight-limited structures and roofs where every square metre has to count.

Watch-outs
-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.

56.2 kg per kWp

Bottom 7% of the TOPCon 450-500 W segment, against a median of 52.2. Ranked 10,501st in the whole database.

220.5 watts per square metre

Bottom 21% of the TOPCon 450-500 W segment, against a median of 225.2.

What owners get
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.

Trade-offs
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.

Notes from the database
  • Efficiency of 22.1% matches the TOPCon 450-500W median
  • 220.5 W/m² power density is 4.7 W/m² below TOPCon 450-500W median (225.2 W/m²) - requires larger installation area
  • At -0.31%/°C, loses 0.02pp more power per degree than TOPCon 450-500W median (-0.29%/°C)
  • At 25.3 kg, this panel is 1.3 kg heavier than the TOPCon 450-500W median (24.0 kg) - more demanding for installation crews
  • Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface

Specifications

Open datasheet PDF
Nominal power (Pmax) 450 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.05 % Weak Segment median 22.52%
Vmpp · Impp 32.73 V · 13.75 A Operating point at max power
Voc · Isc 39.41 V · 14.46 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1800×1134×30 mm · 2.04 m² of roof
Weight 25.3 kg Weak Weak · 1.3 kg above median
Cells 108 · TOPCon Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.310 %/°C Weak bottom 6% of its segment
Coefficient Voc · Isc -0.260 · 0.046 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 30 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 393 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-
With bifacial gain
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.310 %/°C against a segment median of -0.290
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
Axitec AC-450TGB/108WB 450 W 22.05% -0.310 25.3 kg You are here
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +45 W, cooler, +2.8 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, lighter, +2.4 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +50 W, cooler, +2.4 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +50 W, cooler, +2.4 pp
GK-3-54HGb-500M 500 W 24.50% -0.260 21.4 kg +50 W, cooler, +2.4 pp
GCL-NR10R/54BGDF 500 W 24.50% -0.260 24.6 kg +50 W, cooler, +2.4 pp
AC-445TGB/108WB 445 W 21.80% -0.310 25.3 kg -0.2 pp
AC-455TGB/108WB 455 W 22.29% -0.310 25.3 kg +0.2 pp
AC-460TGB/108WB 460 W 22.54% -0.310 25.3 kg +10 W, +0.5 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +60 W, cooler, +2.9 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +55 W, cooler, +2.6 pp

Found 197 panels of the same or similar size to this one, within ±10 mm. See them here Found 201 panels of the same or similar size to this one, within ±25 mm. See them here Found 1712 panels of the same or similar size to this one, within ±50 mm. See them here Found 4014 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
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.
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