IBC Module Transparent 455 ES-TZ1 Bifacial, Transparent, Glass/Glass

Tiered Pricing available this Price is for 1 to 35 units

The IBC Module Transparent 455 ES-TZ1 is a bifacial, double-glass (glass/glass) solar panel from German company IBC Solar AG. It belongs to their premium TOPCon (n-type) series, designed for residential, commercial, and industrial rooftops where high efficiency, durability, and potential extra yield from the rear side are valued. The "Transparent" designation indicates a fully bifacial design with clear/low-iron glass on both front and back, allowing light transmission and reflection capture from the rear. It features a black anodized aluminum frame for a sleek, modern aesthetic.

Key Specifications (at STC for the 455 Wp variant)

Maximum Power (Pmax): 455 Wp (power tolerance -0/+3%)
Module Efficiency: 22.77%
Dimensions: 1762 × 1134 × 30 mm (compact rectangular format, good for many rooftops)
Weight: 24.9 kg (relatively lightweight for a glass-glass bifacial)
Cell Configuration: 96 monocrystalline half-cut cells (12 × 8 layout)
Bifaciality: Up to ~25% additional yield claimed (depending on rear irradiance, albedo, mounting height, and surface reflectivity; BNPI example: ~500.5 Wp with 1000 W/m² front + 135 W/m² rear)
Temperature Coefficients:
- Pmax: -0.25%/°C (very good for hot conditions)
- Isc: +0.045%/°C
- Voc: ~-87.78 mV/°C
STC Electrical Data (approx.):
- Voc: 35.11 V
- Isc: 15.93 A
- Vmp: 30.16 V
- Imp: 15.09 A
NMOT Power: ~341 W (at 45°C cell temp)
Mechanical Loading: Test load 5400 Pa front / 2400 Pa rear; design load 3600/1600 Pa
Construction: 2.0 mm low-iron solar glass (front with anti-reflective coating) + 2.0 mm low-iron glass (rear); anodized aluminum hollow-chamber frame
Junction Box/Connectors: IP-rated with Stäubli MC4-EVO 2A compatible; 1.4 m cable length
System Voltage: Up to 1500 V DC
Operating Temperature: -40°C to +85°C

Warranties (valid for Europe/Japan installations per manual):

25 years on product/materials and workmanship
30 years linear power output: ≤1% degradation in year 1, then ≤0.4% per year thereafter (guarantees strong retention, e.g., ~84.8–87% at year 30)
IBC Solar provides a German guarantor for reliability.

Performance and FeaturesThe ES-TZ1 emphasizes high energy yield and robustness:

Bifacial gain — The transparent glass/glass design captures reflected/diffused light from the rear, potentially adding 10–25% extra output in suitable setups (e.g., elevated mounts, light-colored roofs/grounds, trackers, or snow/sand environments). Real gains vary significantly with site albedo and clearance.
TOPCon n-type technology — Delivers excellent low-light performance, lower degradation, and better temperature behavior than older PERC modules.
Half-cut cells — Reduce resistive losses, improve shading tolerance (partial shading affects fewer cells), and help lower operating temperatures.
Double-glass protection — Superior resistance to PID (potential-induced degradation), moisture, mechanical stress, and environmental factors compared to glass-backsheet designs. Fire class C; strong hail/wind/snow resistance.
Compact size and moderate weight make it easier to handle/install than larger 144-cell utility modules.

IBC Solar highlights "engineered in Germany" quality, with certifications including IEC 61215/61730, ISO 9001/14001, and others. The series targets maximum area efficiency and long-term LCOE reduction.

DATA SHEET