SOLETKS Integrated Solar Water Heaters combine high-efficiency collectors, durable tanks, and modular design — delivering safe, energy-saving hot water for homes, hotels, and commercial projects.
Modern households demand more than just hot water—they seek systems that combine efficiency, stability, and comfort. The SOLETKS Flat-Panel Solar Water Heater is engineered to meet these evolving needs, delivering reliable hot water even under moderate sunlight.
Multi-angle mounting system (0°, 25°, 45°) seamlessly integrates with villas, gabled roofs, flat roofs, and multi-storey residences—even irregular slopes. This flexibility ensures hassle-free, precise installation on any home.
With a 95% solar absorption rate, SOLETKS heats water efficiently even on cloudy days. Reduces household energy costs and carbon emissions, supporting an eco-conscious lifestyle.
Leverages density difference between hot and cold water to circulate heat without electricity. Eliminates pump maintenance, lowers operating costs, and ensures continuous hot water even during power outages.
Tailored for every household size and demand:
Pressurized storage tank maintains consistent water pressure at the showerhead, ensuring comfortable flow regardless of remaining hot water volume.
Enamel-coated inner tank baked at over 830℃ resists corrosion and scaling. Magnesium anodes neutralize corrosive substances, guaranteeing long-lasting, clean water.
Flat-plate collectors heat an internal medium that transfers warmth to the water tank, minimizing heat loss and ensuring reliable hot water even in winter.
50mm polyurethane foam layer (0.022 W/(m·K)) locks in heat, keeping water warm day and night without reheating.
International certification guaranteeing heat collection efficiency, insulation performance, and safety standards for reliable operation.
Reliable Hot Water, Sustainable Living
Experience a smarter way to heat water. The SOLETKS Flat-Panel Solar Water Heater combines cutting-edge solar technology with practical design to provide efficient, consistent, and eco-friendly hot water for modern households. Even on cloudy days, it delivers comfort and reliability while reducing energy costs and carbon footprint.
| Model | Collector | Tank (L) | Dimensions | Insulation | Working Pressure | Inner Tank | Outer Tank | Auxiliary Heating |
|---|---|---|---|---|---|---|---|---|
| Soletks-ET-150 | Soletks2.0-2(x1) | 150 | φ520*1300 | PU foam 50 mm | 7 bar | 2.0 mm | Powder-coated steel | 1.5 KW |
| Soletks-ET-200 | Soletks2.5-2(x1) | 200 | φ580*1310 | PU foam 50 mm | 7 bar | 2.5 mm enamelled | Powder-coated steel | 2.0 KW |
| Soletks-ET-300 | Soletks2.0-2(x2) | 300 | φ580*1830 | PU foam 50 mm | 7 bar | 2.5 mm enamelled | Powder-coated steel | 2.0 KW |
Versatile installation solutions designed for diverse architectural environments
The solar panel mounting system offers multiple angle brackets (0°, 25°, 45°) to accommodate diverse roof structures. The adjustable bracket angles allow precise alignment with roof slopes, ensuring seamless integration for flat roofs, sloped surfaces, and irregularly angled roofs. This innovative solution effectively addresses the common challenge of "difficult solar panel installation on roofs" by providing adaptable mounting options that perfectly match structural characteristics.
Luxury homes with flexible roof designs
Sloped roofs with various angles
Modern buildings with horizontal surfaces
Apartment buildings and complexes
Multiple bracket angles ensure optimal solar panel positioning for maximum energy collection efficiency across different roof types and orientations.
Five key innovations that redefine solar water heating performance
The efficient utilization of solar energy is crucial in product design. This all-in-one unit boasts a solar absorption ratio of up to 95%, capable of heating even under average sunlight conditions while efficiently collecting heat. Compared to traditional electric or gas water heaters, it requires no substantial energy consumption, saving household expenses and reducing pollution – perfectly aligning with the green living philosophy.
The efficient utilization of solar energy is crucial in product design. This all-in-one unit boasts a solar absorption ratio of up to 95%, capable of heating even under average sunlight conditions while efficiently collecting heat. Compared to traditional electric or gas water heaters, it requires no substantial energy consumption, saving household expenses and reducing pollution – perfectly aligning with the green living philosophy.
95% solar absorption rate reduces electricity costs by up to 70% annually
The water heater adopts the design of non-powered natural circulation, which uses the horizontal density difference between hot and cold to realize water circulation heating. There is no need to consume electricity, reduce operation cost and failure probability, and users do not need to worry about pump maintenance, so they can enjoy stable hot water safely.
No pumps, no moving parts – reliable operation for years without service
Different family population, different water use habits, different demand for capacity. A variety of specifications to meet the needs of different families for hot water.
A family of three selects 150L to meet daily needs; larger families choose 200L/300L
The water flow fluctuates during the shower, significantly reducing the experience. The water heater operates using a pressure-boosting water storage tank, with the water pressure entirely determined by the tap water pressure – No matter how much hot water remains in the tank, the showerhead maintains a steady flow of water, avoiding the issue of "the more you use, the weaker the flow becomes."
7 bar working pressure ensures powerful shower flow from first to last drop
The tank's quality determines both the water heater's lifespan and water quality. The all-in-one unit features an enamel tank with porcelain interior and steel exterior. The ceramic glaze layer is fixed on a specialized steel plate through high-temperature baking at over 830℃, resisting long-term erosion from 100℃ hot water while preventing corrosion and scaling. Combined with magnesium rods for corrosion protection, these rods actively react with corrosive substances in the water, extending tank durability and maintaining clean water quality – giving your family peace of mind with every use.
830℃ enamel coating + magnesium anode = 10+ years of reliable service
Pioneering sustainable energy solutions across continents, delivering innovative solar heating and hot water systems.
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SOLETK Solar products are certified to meet international quality and safety standards, including Solar Keymark, CE, and ISO. Below are the individual certificates for each product, demonstrating SOLETK Solar's commitment to reliability, performance, and compliance.
Test Report
Quality Assurance Report
Solar Keymark
European Quality Standard
ISO
International Organization for Standardization
ISO
International Organization for Standardization
ISO
International Organization for Standardization
Product
Product Certification
Product
Product Certification
Product
Product Certification
Solar Keymark
European Quality Standard
Product
Product Certification
Product
Product Certification
ISO
International Organization for Standardization
ISO
International Organization for Standardization
ISO
International Organization for Standardization
Solar Keymark
European Quality Standard
Solar Keymark
European Quality Standard
Product
Product Certification
Product
Product Certification
Product
Product Certification
Product
Product Certification
Product
Product Certification
Innovative solutions powered by cutting-edge technology and sustainable practices
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.
Advanced flat-plate collector technology maximizing energy efficiency
Cutting-edge innovation portfolio protecting proprietary technologies
Strategic collaboration with leading institutions worldwide
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.
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