Solar water heater closed system 150 liters pressure BERG Z-PS5815

The BERG Z-PS5815 150-liter closed system solar water heater is a solar system designed for efficient use of solar energy for domestic hot water. With a capacity of 150 liters and 15 borosilicate glass vacuum tubes, the system operates under pressure and includes an inlet for a heater.

• Solar system - closed type, under pressure
• Capacity: 150 liters
• Heater inlet: 1 piece
• Borosilicate glass vacuum tubes: 15 pieces
• Tank material: stainless steel SUS304-2B with a thickness of 0.31–0.5 mm
• External tank made of high-quality stainless steel with a thickness of 0.31–0.5 mm
• Insulation: polyurethane foam with a thickness of 50–55 mm
• Vacuum tubes CU/SS-AL/N, length 1.8 m, diameter 58 mm
• Stainless steel frame with a thickness of 1.2–2 mm
• Working pressure: 0.6 MPa
• Available accessories: solar controller, electric heater 1500 W

The system captures up to 95% of sunlight thanks to the high-efficiency coating of the vacuum tubes. Even in less sunny weather, the vacuum tubes ensure effective operation by absorbing solar energy and converting it into heat.

Operating principle:

• Solar absorption: thermal energy is absorbed in the vacuum tubes and concentrated.
• Solar heat transfer: copper tubes with a special heat transfer gas carry the heat to the main copper tube.
• Solar heat storage: the gas expansion transfers the heat transfer fluid, which circulates and raises the temperature.

The liquid in the vacuum tubes boils at the base, rises in a gaseous state, releases heat to the main copper tube, condenses, and returns, with the process continuously repeating. The vacuum tubes are the main energy absorbers and are characterized by reliability and high efficiency.

Tank - heat exchanger:

For optimal operation, the tank should be positioned above the collector to avoid backflow and heat loss at night. The tank operates without pressure, ensuring safety during operation.

The outer and inner walls of the tank are made of SUS304 stainless steel with a thickness of 0.5 mm, resistant to corrosion and certified for non-toxic use. The 50 mm thick polyurethane foam insulation provides good heat retention.

The tank material is corrosion-resistant and has been treated through an advanced casting process that minimizes the risk of rusting.

• Independence from rising electricity prices
• Operates without the need for pumps, pipes, or additional devices
• Year-round use, including winter with sufficient sunlight
• The materials of the stand and water container are made of stainless steel, preventing corrosion
• Temperature in the vacuum tube reaches up to 250 °C, and water heats up to about 100 °C in about 3 hours
• The system operates without pressure and is completely safe
• The construction withstands hail up to 25 mm in size
• The absorbing surface absorbs about 93–94% of solar rays
• The system continues to function even if a tube breaks, as long as it is sealed
• Low costs for connecting to the water system
• Minimal temperature losses thanks to vacuum insulation
• The design provides good wind resistance
• Effective operation at non-optimal southern orientation due to the round shape of the tubes
• Up to twice as effective in winter compared to flat collectors
• Does not retain snow and dust

Instructions