Direct Answer

Yes. Switchable™ glass requires electrical power to switch from opaque to transparent. Power is only needed to maintain the clear state. When no power is applied, the glass automatically returns to its opaque, privacy state.

How Power Controls Switchable™ Glass

Switchable™ glass uses PDLC (Polymer Dispersed Liquid Crystal) technology embedded within a laminated glass structure. When an electrical current is applied, microscopic liquid crystals align, allowing light to pass through and making the glass transparent. When the power is removed, the crystals return to a scattered state, diffusing light and creating privacy.

This switching process happens instantly.

Does Switchable™ Glass Use Power Constantly?

Power is only required when the glass is transparent. In its default, unpowered state, Switchable™ glass remains opaque and does not consume electricity. This means energy usage depends on how often the transparent state is used.

What Happens During a Power Cut?

If power is lost, Switchable™ glass automatically returns to its opaque state. This behaviour ensures privacy is maintained even without electricity.

How Much Power Does Switchable™ Glass Use?

Switchable™ glass typically operates on low voltage and consumes relatively low power compared to many electrical systems. Exact consumption depends on panel size, specification, and installation design.

Is Electrical Integration Complicated?

Electrical integration is normally incorporated during installation. Switchable™ glass can be controlled using:

• Wall switches
• Remote controls
• Automation systems
• Smart building controls

The control method depends on the installation specification.

When Power Use Matters

Power requirements are most relevant in environments where:

• Glass remains transparent for extended periods
• Large panels are installed
• Automated control systems are used

In many installations, energy usage remains relatively low due to the glass only requiring power in transparent mode. For optimal LCD film performance, Switchable™ glass is typically left in its opaque state for a short period each day depending on control settings and usage.

Learn More

To understand how the switching technology works, see How Switchable™ Glass Works.

For a full overview of performance, applications, and specification, see the Complete Guide to Switchable™ Glass.

For a clear definition, see What is Switchable™ Glass?

You can explore more technical explanations within the Your Questions Explained knowledge hub.

Frequently Asked Questions

Does Switchable™ glass stay clear without power?
No. When power is removed, the glass returns to its opaque privacy state.

Is Switchable™ glass always opaque by default?
Usually its natural state without power is opaque.

Does Switchable™ glass use a lot of electricity?
No. It typically uses low voltage and relatively low power, depending on panel size and usage.

Is the switching process instant?
Yes. The transition between opaque and transparent states occurs immediately when power is applied or removed.

Can Switchable™ glass be controlled automatically?
Yes. It can be integrated with automation and smart control systems depending on installation design.