Polar Star

Specific PV applications

  • PV Panel Recycling
  • PV Panel Renovation Technology
  • High-Temperature Solar PV Panels
  • Polar Star
  • Hybrid Photovoltaic
  • Solar Concentrators
  • Bifacial Solar Panels
  • Solar Street Lamp
  • TRAXLE Solar Pumping Systems
  • Photovoltaic Systems

Photovoltaic Panels for Extreme Climate Conditions

Overview

The Polar Star series of photovoltaic (PV) panels are designed with a polysiloxane gel encapsulant, making them uniquely suitable for both extremely cold Arctic climates (down to –60 °C) and hot desert conditions (up to +100 °C).
 Unlike conventional EVA-based panels, Polar Star panels maintain stability, flexibility, and reliability across a wide range of temperatures, ensuring long-term durability in challenging environments.

Challenges with EVA Encapsulant in Cold Environments

The main reason for the failure of standard EVA-based PV modules in extreme cold (below –30 °C) is:

  • Cracking of solar cells due to excessive stiffness of EVA.

  • Delamination of the EVA film from the glass or rear protective layers.

This happens because:

  • The mechanical properties of EVA (such as elasticity and flexibility) change drastically with temperature.
  • When temperature drops from room level to –40 °C, the modulus of elasticity (stiffness) of EVA nearly doubles.
  • This rigidity prevents EVA from absorbing mechanical stress, transferring it directly to fragile solar cells.
  • At the same time, EVA’s adhesion properties weaken at low temperatures, causing delamination and reduced panel life.
Why Polysiloxane Gel Works Better

In contrast to EVA, polysiloxane gel encapsulant retains its mechanical, adhesion, optical, and dielectric properties consistently across the wide temperature range of –60 °C to +200 °C.

Key Benefits:
  • Consistent flexibility: Unlike EVA, the gel does not undergo vitrification (hardening) at low temperatures.
  • Superior mechanical protection: The gel absorbs mechanical stresses, protecting fragile solar cells.
  • Longer operational lifespan: Maintains high efficiency and reliability in both extreme cold and hot environments.
 
Specifications (TSM-235DS Polar Star Panel)

Data at Standard Test Condition (T=25 ℃, AM=1.5, E=1000W/m²)

1Peak Power (Pm)235 W
2Open Circuit Voltage (Voc)37.0 V
3Short Circuit Current (Isc)8.2 A
4Maximum Power Voltage (Vmp)30.7 V
5Maximum Power Current (Imp)7.7 A
6Temperature Coefficient of Current+0.05%/°C
7Temperature Coefficient of Voltage–0.31%/°C
8Temperature Coefficient of Power–0.40%/°C
9Maximum System Voltage1,000 V
10Working Temperature Range–40 °C to +110 °C
11Dimensions (L x W x H)1650 x 995 x 50 mm
12Cell TypeMonocrystalline
13EncapsulantPolysiloxane gel
14Junction Box, Cables & ConnectorsTyco
15Cell Count & Size60 pcs, 156 x 156 mm
16Front Glass Type & ThicknessTempered, 3.2 mm
17Back Glass Type & ThicknessTempered, 2.0 mm
18Installation Hole SpacingD1 = 948 mm, D2 = 674 mm, Hole Ø 9 mm
19Weight26 kg
Key Advantages of Polar Star Panels
  • Designed for polar, alpine, and desert climates.
  • Reliable operation in temperatures from –60 °C to +110 °C.
  • Superior mechanical stress absorption prevents cell cracking.
  • No delamination issues like EVA-based panels.
  • Longer lifespan and higher efficiency under harsh weather conditions.