Product Details

Evacuated Tube Collector(ETC) Water Heater

Evacuated Tube Collector (ETC) water heaters use advanced vacuum tube technology to deliver efficient solar water heating, even in low sunlight, cloudy, and colder conditions. Designed for domestic, commercial, and industrial use, ETC systems provide reliable hot water with minimal recurring energy consumption.

50-60°C Hot Water Temperature

100-25,000L System Capacity Range

15 Years Service Life

24/7 Customer Support

Product Specifications

ETC Water Heater Specifications

Engineered for high thermal efficiency and long-term durability, evacuated tube water heating systems are designed to maximise heat absorption while minimising thermal losses through vacuum insulation.

Type of System

Evacuated glass tube solar water heating system.

Collector Type

Evacuated glass tube solar thermal collector with vacuum insulation.

Absorber Coating

Triple selective coating enhances solar absorption and heat retention.

Tube Material

High boron and silicon content glass construction.

Tube Structure

Twin glass tube coaxial structure with vacuum sealing.

Insulation

High-density PUF insulation reduces heat loss effectively.

Tank Configuration

GI inner tank with coated outer cladding protection.

Circulation Type

Thermosiphon circulation suitable for non-pressurised systems.

Service Life

Designed for long-term operation up to fifteen years.

System Design

Advanced Evacuated Tube Technology

ETC water heaters use vacuum-sealed glass tubes to minimise heat loss and improve performance in diffused sunlight conditions. The selective coating and vacuum insulation enable consistent hot water availability throughout the day.

Evacuated tube vacuum insulation design
Efficient performance in cloudy conditions
High absorption selective coating technology
Reduced thermal loss for improved efficiency

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<span class="primary-color">Advanced Evacuated</span> <span class="custom-gradient">Tube Technology</span>

Installation

Flexible Installation Compatibility

Evacuated tube water heating systems are suitable for installation across rooftops and open terrace spaces. Their modular tube design allows scalable capacity selection and straightforward system integration.

Suitable for residential and commercial rooftops
Available in wide capacity ranges
Supports non-pressurised system configurations
Simple installation and maintenance access

<span class="primary-color">Flexible Installation </span> <span class="custom-gradient"> Compatibility</span>

Benefits of ETCWater Heater

ETC water heaters are designed to deliver reliable hot water with high thermal efficiency, even in challenging weather conditions. Their vacuum tube technology ensures consistent performance, low energy use, and long service life across varied applications.a

Higher Efficiency

Vacuum tubes maximise heat absorption while minimising thermal losses.

All-Weather Performance

Delivers hot water reliably during cloudy, cold, and low-sunlight conditions.

Energy Savings

Reduces electricity dependence through efficient solar heat utilisation.

Low Maintenance

Simple design and durable materials support long-term, hassle-free operation.

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General Inquiries

Contact@intersolar.com

Personal Information

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Everything You Need To Know Now

An ETC water heater uses vacuum-sealed glass tubes to absorb solar heat efficiently and transfer it to water stored in an insulated tank.

Yes, evacuated tube technology performs efficiently in diffused sunlight, making it suitable for cloudy and rainy conditions.

They are used in homes, hotels, hospitals, apartments, industries, and large-scale hot water requirements.

Yes, an optional ISI-certified electric backup heater can be integrated when required.

The evacuated tube collectors are designed for a service life of up to fifteen years with proper installation and maintenance.

Evacuated Tube Collector(ETC) Water Heater