Flat Plate Thermosiphon Solar Water Heater

In modern households, the demand for hot water has moved beyond basic functionality—it now calls for solutions that are efficient, stable, and comfortable. SOLETKS Solar Water Heater stands out by delivering consistent hot water even without direct sunlight. Its high weather-resistant selective absorption coating captures solar energy efficiently, while copper tubes transfer this heat to the water tank's jacket. The non-contact design prevents water from directly touching conductive materials, ensuring safer water quality. Moreover, the heater is equipped with low-iron corrugated tempered glass, which enhances durability and safety, making it suitable for installation on various types of roofs.

I. Application Scenarios: Villas, Gabled Roofs, Flat Roofs, Multi-Storey Residences

The solar panel mounting system comes with multi-angle brackets (0°, 25°, 45°) to fit different roof structures. These adjustable brackets can be precisely aligned with roof slopes, enabling seamless integration on flat roofs, sloped surfaces, and even irregularly angled roofs. This innovative design effectively solves the common problem of "difficult solar panel installation on roofs" by offering adaptable mounting options that match the unique structural features of each roof.

II. Core Advantages

(1) Efficient Heat Collection for Optimal Energy Utilization

Efficient solar energy utilization is a key focus in the product's design. This all-in-one unit boasts a solar absorption rate of up to 95%, allowing it to heat water even under moderate sunlight conditions while collecting heat efficiently. Unlike traditional electric or gas water heaters, it requires no significant energy consumption—this not only reduces household expenses but also lowers pollution, perfectly aligning with the concept of green living.

(2) Natural Circulation: No Electricity Needed, Simpler Operation

The water heater adopts a power-free natural circulation design. It leverages the horizontal density difference between hot and cold water to achieve cyclic heating. No electricity consumption means lower operating costs and a reduced risk of malfunctions. Users don’t need to worry about pump maintenance, allowing them to enjoy stable hot water safely.

(3) Multiple Capacity Options to Fit Diverse Family Needs

Family size and water usage habits vary, so do hot water capacity requirements. The heater is available in 150L, 200L, and 300L options to meet the needs of different families:

• A 150L unit is ideal for a family of three, covering daily needs such as washing and kitchen use.

• For larger families or those with high hot water demands (e.g., frequent bathing or laundry), the 200L/300L models easily meet requirements, avoiding issues like "insufficient capacity" or "waste of space/resources".

(4) Pressurized Operation for a Steady Shower Experience

Fluctuating water flow during showers significantly undermines comfort. This water heater uses a pressurized water storage tank, where water pressure is entirely determined by tap water pressure. No matter how much hot water remains in the tank, the showerhead maintains a steady flow—eliminating the problem of "weaker flow as hot water is used up".

(5) Enamel Inner Tank + Magnesium Rod: Durable and Hygienic

The quality of the water tank directly affects the heater’s lifespan and water quality. This all-in-one unit features an enamel tank with a porcelain interior and steel exterior. The ceramic glaze layer is fixed on a specialized steel plate through high-temperature baking (over 830℃), resisting long-term erosion from 100℃ hot water and preventing corrosion and scaling. Paired with magnesium rods for corrosion protection—these rods actively react with corrosive substances in water—the tank’s durability is extended, and water quality is kept clean, giving families peace of mind with every use.

III. Core Technology + Authoritative Certification: Quality Guaranteed

(1) Core Structural Technology for Stable Operation

1. Jacket Heat Exchange for More Efficient Heating

The system operates through a thermodynamic cycle involving flat-plate collectors, circulation pipes, and the water tank jacket. Sunlight heats the collectors, transferring thermal energy to the internal medium. As the medium warms up, it rises to the water jacket, where it exchanges heat with the water inside the tank. The cooled medium then flows back to the collectors to be reheated, creating a continuous cycle that minimizes heat loss. This ensures a reliable hot water supply even in winter.

2. High-Quality Insulation Layer to Retain Heat

The water tank is equipped with a 50mm-thick high-density polyurethane foam insulation layer, which has an ultra-low thermal conductivity of 0.022W/(m·K). This effectively prevents heat loss, maintaining stable water temperatures regardless of day-night cycles or external weather conditions. Even on cold winter nights, the water remains consistently warm—so you can enjoy ready-to-use hot water the next morning without waiting for the system to reheat.

(2) Solar Keymark Certification: Reliable Performance

The product’s performance is certified by the internationally recognized Solar Keymark. This certification sets strict standards for solar products’ heat collection efficiency, insulation performance, and safety—providing users with reliable quality assurance.

IV. Enamel Direct Solar Water Heater: Model Specifications

FAQs

Q: How does a flat-panel solar water heater work?

A: A flat-panel solar water heater relies on its collector panel to absorb heat. The collector panel contains copper tubes, and the medium inside these tubes circulates: the heated medium rises and enters the water tank’s jacket for heat exchange, which warms the water in the inner tank—ultimately providing hot water for use.

Q: What are the advantages of an all-in-one flat-panel solar water heater?

A: It offers multiple advantages, including pressurized operation, separate installation capability, building integration, flexible and convenient installation, aesthetic appeal (without damaging the building), safety and reliability, no descaling required, strong self-protection functions, long service life, high heat collection efficiency, clean hot water production, and freeze resistance.

Q: Can a flat-panel solar water heater work normally in bad weather?

A: Yes. Many flat-panel solar water heater units feature dual solar-electric functionality. When weather conditions are poor (resulting in insufficiently heated solar water), an electric heating system kicks in to ensure continuous hot water supply.

Q: Do flat-panel solar water heaters require regular maintenance?

A: Regular maintenance is necessary. While flat-panel solar water heaters need less upkeep than vacuum tube models, owners should regularly check the collector surface for dirt and clean it promptly when needed to maintain efficiency. Additionally, inspecting pipeline connections for leaks is important to ensure smooth system operation.