Tempered vs Ordinary Glass in Photovoltaic Panels Which Is Better

Introduction to Photovoltaic Glass

When exploring solar energy solutions, one critical question often arises: Is photovoltaic glass tempered or ordinary? This article breaks down the differences, applications, and industry trends to help you make informed decisions. Whether you're a contractor, architect, or eco-conscious homeowner, understanding this distinction could save costs and improve system longevity.

Why Glass Type Matters in Solar Panels

Photovoltaic (PV) glass serves as the protective layer for solar cells. Its durability directly impacts:

• Energy efficiency over time
• Resistance to environmental stress
• Safety for rooftop installations

The Dominance of Tempered Glass

Over 80% of commercial solar panels use tempered glass due to its unique advantages:

• 4-5x stronger than ordinary glass
• Breaks into harmless granules (safer for rooftops)
• Better thermal shock resistance (-40°C to 85°C)

"Tempered glass isn't just a preference – it's an industry standard for large-scale solar farms," notes EK SOLAR's chief engineer.

When Ordinary Glass Makes Sense

While less common, ordinary glass appears in:

• Experimental thin-film solar applications
• Temporary solar installations
• Low-budget projects with short lifespans

Performance Comparison

Feature	Tempered Glass	Ordinary Glass
Surface Compression	10,000-20,000 psi	0 psi
Impact Resistance	Withstands hail up to 1"	Fails at 0.5" hail
Cost Premium	15-20% higher	-

Emerging Trends in PV Glass

The solar industry is witnessing exciting developments:

• Anti-reflective coatings boosting efficiency by 3%
• Self-cleaning surfaces reducing maintenance
• BIPV (Building-Integrated Photovoltaics) gaining traction

Making the Right Choice

Consider these factors for your solar project:

• Climate: Temperate regions vs. extreme weather zones
• Budget: Upfront cost vs. 25-year ROI
• Safety: Residential rooftops vs. ground installations

FAQ: Photovoltaic Glass Explained

Can ordinary glass be tempered after installation?

No – tempering must occur during manufacturing through controlled thermal processes.

How does glass thickness affect solar performance?

Most panels use 3.2mm glass, balancing weight and durability. Thicker glass (4mm) is used in high-wind areas.

Do all solar warranties require tempered glass?

Reputable manufacturers typically mandate tempered glass for warranty validation.