Solar Tempered Glass — Product Description

Overview

Solar tempered glass is low-iron (ultra-clear) glass designed for photovoltaic modules. It is used as front cover glass for crystalline silicon modules and as front or rear glass for dual-glass (glass–glass) modules. The glass is fully tempered to provide the mechanical strength, thermal-shock resistance, and impact safety required for outdoor PV use.

Available thicknesses: 2.0 mm, 2.5 mm, and 3.2 mm.
Available surface options: uncoated and AR-coated.
Processing options: silk-screen printing and hole drilling.

Light Transmittance

Light transmittance is a key optical parameter of solar glass. Higher transmittance increases the irradiance reaching the cells and supports higher module output.

Transmittance is verified against the agreed specification for each order. Final values may vary slightly with thickness, coating design, and silk-screen coverage.

Thickness Options

Thickness tolerance is controlled per customer drawing and order agreement.

Silk-Screen Printing

The glass supports high-temperature ceramic frit silk-screen printing before tempering.

Typical applications:

• White or black grid / mesh glaze on dual-glass rear glass
• Edge masking and custom patterns per artwork

The frit is fired during tempering and forms a durable bonded layer suitable for outdoor module service. Pattern, color, and coverage are defined by the customer drawing.

Hole Drilling

Holes and openings can be processed before tempering, including:

• Junction-box cable holes
• Mounting or positioning holes
• Custom openings per module design

Hole size, position, and edge finish are executed according to the approved drawing. All drilling is completed prior to tempering.

Coating Options

Uncoated
Low-iron ultra-clear tempered glass without AR film. Typical solar transmittance ≥ 91.5%. Suitable where AR coating is not required.

AR-coated
Anti-reflective coating applied as specified. Typical solar transmittance ≥ 93.5% – 94.0%. Reduces first-surface reflection and increases light available to the cells.

Product Features

• Low-iron ultra-clear solar glass substrate
• Fully tempered for PV outdoor use
• High light transmittance: uncoated and AR-coated options
• Thicknesses: 2.0 / 2.5 / 3.2 mm
• Silk-screen printable (ceramic frit)
• Hole drilling available before tempering
• Suitable for front cover glass and dual-glass module structures

Applications

• Front cover glass for crystalline silicon PV modules
• Front and rear glass for dual-glass bifacial modules
• Lightweight and thin dual-glass designs (2.0 / 2.5 mm)
• Modules requiring silk-screened rear glass and/or pre-drilled openings

Ordering Guide

Please specify:

1. Thickness: 2.0 / 2.5 / 3.2 mm
2. Coating: uncoated or AR-coated
3. Silk-screen: yes/no, with artwork if required
4. Holes: yes/no, with dimensional drawing
5. Size, edge finish, surface type (patterned or float), and packaging requirements

Optical and dimensional acceptance criteria follow the contract specification and inspection report for each shipment.