Premium Solar Technology

Efficient, Reliable, and
Hassle-Free Hot Water

Maximize energy savings and comfort with SOLETKS Solar Water Heaters — high-efficiency collectors, natural circulation, and modular design for effortless installation and long-lasting performance.

Optimized Thermal Output Advanced D-DOS coating, up to 93% absorption

Stable Performance 0.6MPa pressurized operation for steady flow

Self-Circulating Silent, safe, no pump required

Easy Installation Modular, compact design saves time and labor

Durable & Low Maintenance Stainless steel/enamel tanks with reinforced frame

Flexible Utility 150L–300L capacities, adjustable mounting angles

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Integrated Solar Technology

SOLETKS Integrated Solar Water Heater

Efficient, Reliable, and Flexible Hot Water Solutions

Designed with energy efficiency at its heart, the SOLETKS Integrated Solar Water Heater delivers high-performance, pressurized hot water while reducing energy costs and environmental impact. Its advanced D-DOS coating collectors achieve up to 93% solar absorption, maximizing thermal efficiency even under low sunlight.

Installation Made Simple

Thanks to its modular and compact design, the system is easy to transport and assemble. Preassembled core modules streamline on-site installation, saving time and labor costs—ideal for both urban rooftops and rural deployments.

Durable, Low-Maintenance Engineering

Built to last with optional stainless steel or enamel tank liners. The 2mm-thick galvanized frame, treated with anti-corrosion coating, ensures structural stability and long-term durability in all weather conditions.

Flexible and Scalable Design

Available in 150L, 200L, and 300L capacities with adjustable mounting angles (0°, 25°, 45°). Can be linked in series or parallel to meet diverse household and commercial requirements with ease.

Technical Specifications

Engineered for optimal performance and reliability

Capacities

150L / 200L / 300L

Mounting Angles

0° / 25° / 45°

Operating Pressure

0.6 MPa

Core Strengths

Six pillars of excellence in solar water heating technology

Optimized Thermal Output

Advanced D-DOS coating collectors deliver maximum solar absorption with up to 93% efficiency.

Stable Performance

0.6 MPa pressurized operation ensures consistent hot water flow with reliable pressure.

Self-Circulating System

Natural convection eliminates pumps, noise, and overheating for silent, safe operation.

Easy Installation

Modular design and preassembled modules significantly reduce setup time and labor costs.

Durable Engineering

Stainless steel or enamel tanks with reinforced, corrosion-resistant galvanized frame.

Flexible Utility

Multiple capacities, adjustable angles, and customizable series/parallel integration options.

Technical Specifications

Product Parameters

Comprehensive technical data for three capacity models, engineered for optimal performance and reliability

Specification	Soletks-ET-150	Soletks-ET-200	Soletks-ET-300
Model	ET-150	ET-200	ET-300
Collector	Soletks2.0-2 (x1)	Soletks2.5-2 (x1)	Soletks2.0-2 (x2)
Tank Capacity	150 L	200 L	300 L
Dimensions	φ520 × 1300 mm	φ580 × 1310 mm	φ580 × 1830 mm
Insulation	PU foam 50 mm	PU foam 50 mm	PU foam 50 mm
Working Pressure	7 bar	7 bar	7 bar
Inner Tank Material	2.0 mm stainless steel	2.5 mm enamelled	2.5 mm enamelled
Outer Tank Material	Powder-coated steel	Powder-coated steel	Powder-coated steel
Auxiliary Heating	1.5 KW	2.0 KW	2.0 KW
Corrosion Protection	Magnesium anode	Magnesium anode	Magnesium anode

Versatile Applications

Perfect for Every Environment

The Integrated Solar Water Heater is a versatile and energy-efficient solution designed to meet the hot water needs of both domestic and commercial projects. Its modular design, pressure operation, and reliable heat transfer technology make it suitable for a wide range of applications across different environments.

Residential Homes

Hotels & Resorts

Apartment Buildings

Industrial Projects

Rural Areas

24/7 Operations

Our Projects

Global Solar Energy Excellence

Pioneering sustainable energy solutions across continents, delivering innovative solar heating and hot water systems.

Featured

Centralized Solar Heating for Saga County Town in Shigatse City

2019 Shigatse, Tibet 107,000 m²

EFPC115 large flat-plate collectors provide heating coverage for 107,000 m², replacing traditional coal and yak dung heating. Reduces coal consumption by 2,424 tons annually.

World's first high-altitude solar centralized heating

First full-chain turnkey solar heating project

Tibet's first large-scale solar heating

Tianjin School TPV Pro+ Heat Pump Project

2024 Tianjin 3,000 m²

TPV Pro+ heat pump system meets students' heating needs while generating on-site electricity.

APEC Summit Hotel Hot Water System

2014 Beijing 50 tons/day

Supplies hot water for APEC Summit hotel. Saves 150,000 kWh annually, reduces CO2 by 74 tons.

Florida Resort Villa Hot Water Project

2022 Florida, USA 200L/day

Flat-plate water heaters provide 200L daily hot water for each resort villa.

Innovative solutions powered by cutting-edge technology and sustainable practices

Industry Leader

SOLETKS is a high-tech enterprise focused on clean energy innovation. With its core Flat-Plate Clean Thermal Energy technology, the company integrates solar, geothermal, and air energy to deliver efficient solutions for heating, cooling, and power generation.

Backed by partnerships with leading research institutions, SOLETKS ranks among the world's top manufacturers of flat-plate collectors, driving global progress toward a sustainable future.

117+

Patents Secured

Top 5

Global Ranking

Our Core Strengths

Solar Integration

Advanced flat-plate collector technology maximizing energy efficiency

117+ Patents

Cutting-edge innovation portfolio protecting proprietary technologies

Research Partners

Strategic collaboration with leading institutions worldwide

Innovation in Action

Advanced Technology

Sustainable Solutions

Global Excellence

SOLETKS – The First Choice for Global Customers

Trusted by Industry Leaders Worldwide

From residential installations to large-scale industrial projects, SOLETKS delivers proven solar thermal solutions across continents, empowering sustainable energy transformation globally.

Get In Touch

Let's Connect

We're here to answer your questions and help you achieve your goals

24/7 Support

Fast Response

Expert Team

+86 15318896990

Phone

+86 15318896990

export@soletksolar.com

Address

No.2228, Jinghua Avenue, Economic and Technological Development Zone, Dezhou City, Shandong Province, China

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Efficient, Reliable, andHassle-Free Hot Water

SOLETKS Integrated Solar Water Heater

Installation Made Simple

Durable, Low-Maintenance Engineering

Flexible and Scalable Design

Technical Specifications

Core Strengths

Optimized Thermal Output

Stable Performance

Self-Circulating System

Easy Installation

Durable Engineering

Flexible Utility

Product Parameters

Perfect for Every Environment

Global Solar Energy Excellence

Centralized Solar Heating for Saga County Town in Shigatse City

Tianjin School TPV Pro+ Heat Pump Project

APEC Summit Hotel Hot Water System

Florida Resort Villa Hot Water Project

Harz Church Hot Water Project

Global Certifications & Quality Assurance

Test Report Certificate

Solar Keymark Certification

ISO 9001 Quality Management

ISO 14001 Environmental Management

ISO 45001 Occupational Health & Safety

Air Solar Collector

Flat Plate Solar Collector

PVT Solar System

Solar Keymark Certification

Solar Water Heater

Vacuum Tube Solar Collector

ISO 9001 Quality Management

ISO 14001 Environmental Management

ISO 45001 Occupational Health & Safety

Solar Keymark Certification

Solar Keymark Certification

Air Solar Collector

Flat Plate Solar Collector

PVT Solar System

Solar Water Heater

Vacuum Tube Solar Collector

Leading the Future of Clean Energy

Our Core Strengths

Solar Integration

117+ Patents

Research Partners

SOLETKS – The First Choice for Global Customers

Let's Connect

Efficient, Reliable, and
Hassle-Free Hot Water