Solar Split Water Heater

A solar split water heater is an advanced hot water system that separates the solar collector from the storage tank. The collector absorbs solar energy through a medium circulation system and converts it into heat. The storage tank, placed indoors or on a balcony, efficiently stores this thermal energy for later use.

This innovative design offers multiple advantages:

Flexible installation in various environments without adding excessive roof load

Reduced heat loss and enhanced freeze protection thanks to the indoor tank placement

Aesthetic integration with modern architecture, ideal for multi-story buildings and villas

Product Features

Food-grade Steel Liner

Clean, hygienic water with no contamination

Medium Circulation

Reliable operation in cold climates

Indoor Water Tank

Safe, convenient, and easy to maintain

User-friendly Design

Simple operation with long service life

Flat Plate
Solar Collector

Advanced solar thermal technology with superior heat collection efficiency and durable construction for residential and commercial applications.

78% optical performance efficiency

Highly selective absorption coating

Aluminium frame construction

0.6 bar rated working pressure

Specification	BTE2.0-2
Overall area (m²)	2
Aperture area (m²)	1.87
L x W x H (mm)	2000 x 1000 x 80
Rated working pressure	0.6 bar
Optical performance	78%
Absorber sheet	Al, highly selective absorption coating
Frame	Aluminium

Model	300	500	800	1000
Collector	BTE-2.0(×3)	BTE-2.0(×4)	BTE-2.0(×8)	BTE-2.0(×10)
Length (mm)	1740	1845	1720/1820	2000/2100
Inner Diameter (mm)	Φ480	Φ580	Φ800	Φ800
Outer Diameter (mm)	Φ580	Φ700	Φ900/1000	Φ900/1000
Insulation	PU foam 60mm		PU foam 50/100mm
Inner tank material	SUS304 / SUS316 L
Outer tank material	Colour-coated sheet
Working pressure	7 bar
Electrical heating element	220V 1500W~3000W / 110V 1500W
Coil pipe material	Optional (copper/sus304/sus316)
Coil size	Φ12 x 1.0mm
Heat exchange coil	None / Bottom coil / Upper coil and Bottom coil
Expansion tank	12L	24L	50L	50L

Model	Input	Pump	Rated Power	Controller	Dimension (mm)
SR21H	AC220V/110V, 50Hz	Grundfos 15-65 130	60-100W	SR258	450 x 300 x 160
TSCEN-6	AC220V/110V, 50Hz	Wilo ST20/11	165W	FTC-6	270 x 460 x 160

System Overview

How a Solar Split Water Heater Works

The diagram illustrates the working principle of a solar split water heating system. The system consists of two main parts — the solar collectors and the hot water storage tank — connected by a medium circulation loop.

Solar Split Water Heater Working Principle

System Benefits

This configuration effectively utilizes solar energy while ensuring high efficiency, safe operation, and year-round reliability, even in cold or variable climates.

1 Solar Collectors

Installed on the roof, absorb solar radiation and convert it into heat.

2 Heat Transfer Medium

Heat-conducting fluid circulates between collectors and storage tank.

3 Work Station & Expansion Tank

Regulate pressure and ensure stable medium circulation.

4 Controller & Temperature Sensors

Automatically monitor and control system temperature for efficiency.

5 Hot Water Storage Tank

Indoor tank stores heated water with built-in electrical backup heater.

6 Safety & TP Valves

Maintain system safety by releasing excess pressure or temperature.

7 Cold and Hot Water Lines

Cold water enters at bottom, hot water supplied from top outlet.

Split System Diagram

Why Choose Our System?

Our solar split water heater combines German-engineered heat pipe technology, military-grade vacuum tubes, and an intelligent split design to deliver exceptional performance and flexibility. With a 10-year tank warranty and 5-year vacuum tube guarantee, enjoy a quick payback period of just 3–5 years and a durable lifespan of over 20 years.

Solar Split System - Rooftop Collector + Indoor Tank

Split Design

German Engineering

Advanced heat pipe technology ensures maximum efficiency in all weather conditions.

Military-Grade Quality

High-quality vacuum tubes withstand extreme temperatures and harsh environments.

Flexible Installation

Split design allows collectors on roof and tank indoors for any building configuration.

Smart Control System

Intelligent controller optimizes energy usage with backup electric heating.

3-5 Year Payback

Quick return on investment

20+ Year Lifespan

Long-term reliability

Eco-Friendly

Sustainable energy solution

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.

Harz Church Hot Water Project

2021 Germany 22 tons/day

Engineering-grade collectors in series/parallel configuration provide reliable hot water supply.

Who We Are

Leading the Future of Clean Energy

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

Product Certification

Top Clean Thermal Energy Solutions Provider in China

Superior Quality

High-performance solar thermal systems built with advanced materials and 160+ strict inspection steps for long-term reliability.

Cost Effective

Efficient production and smart system design ensure maximum energy output with minimal lifecycle costs.

Precision Customization

Tailor-made flat-plate systems designed for diverse climates, industries, and installation requirements.

Innovation Driven

Continuous R&D supported by 117 patented technologies, advancing solar absorption and integrated energy solutions.

Reliable Support

24/7 global technical service and professional on-site assistance for smooth, reliable operation.

Global Reach

Delivering sustainable energy solutions to customers across multiple regions with localized service networks.

Certified Excellence

Recognized as a National High-Tech Enterprise with international certifications for quality and sustainability.

Extended Warranty

Comprehensive product warranty and lifetime technical guidance for long-term peace of mind.

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 & Elegant Solar Hot Water Solution

Solar Split Water Heater

This innovative design offers multiple advantages:

Product Features

Flat PlateSolar Collector

How a Solar Split Water Heater Works

Why Choose Our System?

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

Leading the Future of Clean Energy

Our Core Strengths

Solar Integration

117+ Patents

Research Partners

SOLETKS – The First Choice for Global Customers

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

What Sets SOLETKS Ahead

Superior Quality

Cost Effective

Precision Customization

Innovation Driven

Reliable Support

Global Reach

Certified Excellence

Extended Warranty

Let's Connect

Efficient & Elegant
Solar Hot Water Solution

Flat Plate
Solar Collector