Apricus solar hot water systems and eco-energy equipment, used for sustainable hot water supply in residential and commercial applications. Learn more.

Apricus Solar Water Heater Specification – Key Features

Model: Solar Vacuum Tube Aperture Area Gross Area Capacity 40’HQ Loading
Item No. Qty /【pcs】 Size /【mm】 【M2】 【M2】 【L】 【Sets】
100L-Prime 10 Φ58 X 1800 0.94 1.33 100 180
120L-Prime 12 Φ58 X 1800 1.13 1.596 120 150
150L-Prime 15 Φ58 X 1800 1.41 1.995 150 120
180L-Prime 18 Φ58 X 1800 1.68 2.394 180 100
200L-Prime 20 Φ58 X 1800 1.87 2.66 200 90
240L-Prime 24 Φ58 X 1800 2.25 3.192 240 75
300L-Prime 30 Φ58 X 1800 2.811 3.99 300 60
360L-Prime 36 Φ58 X 1800 3.37 4.788 360 50

 

Apricus Solar Hot Water – Key Features

● Capacity Options: 80L / 100L / 120L / 150L / 180L / 200L / 250L / 300L / 360L
● Inner Tank: Food-grade SUS304 stainless steel (0.4 / 0.5 / 0.7 / 0.8 mm thickness available)
● Evacuated Tubes: Cu / SS-ALN(H) / SS-ALN(L) / ALN – Size: 58 × 1800 mm
● Outer Tank Shell: SUS304-2B stainless steel for corrosion resistance
● Insulation: 55 mm high-density polyurethane foam for excellent heat retention
● Frame: Heavy-duty SUS201 stainless steel, 1.2 mm thickness
● Bracket Angle Options: 20° / 25° / 27° / 30° / 38° / 45°

 

Solar Hot Water Storage Tank
1 Material of out tank SUS-30-4-2B  Stainless Steel.
2 Material of inner tank Food grade stainless steel SUS304-2B,0.4/0.5mm thickness
3 Tank insulating layer 55mm , high-density polyurethane foam
4 Inlet and outlet hole 1/2’’,3/4’’
5 Tube to tube distance 80mm
6 Tank size 470/360mm or 480/360mm
7 Welding: Argon arc welding
Solar Evacuated Vacuum Tubes
8 Tube structure All-glass double deck co-axial structure
9 Glass material High borosilicate 3.3 glass
10 Outer tube dia. and glass thickness Ø58±0.7mm; Glass thickness 1.6±0.15mm
11 Inner tube dia. and glass thickness Ø47±0.7mm; Glass thickness 1.6±0.15mm
12 Tube size 58*1800mm
13 Structure Cu/SS-ALN(H)/SS-ALN(L)/ALN
14 Sediment method Three targets magnetron sputtering plating
15 Specific absorption 0.93-0.96(AM1.5)
16 Emission ratio 0.04-0.06(80℃±5℃)
17 Vacuum tightness 5.0×10¯³ Pa
18 Idle sunning property parameters 260-300 m².C/KW
19 Average heat loss coefficient ULT=0.4~0.6W/(M2.0C)
20 Resistant Hail ≤35mm
21 Useful life 15 years
Solar Water Heater Bracket
22 Bracket: Coated Stronger galvanized steel-1.5mm
23 Bracket angle: 25 degree flat roof
24 Fastening pieces: Stainless steel.

Solar Geysers Working Principle:

The thermosyphon solar water heater (compact non-pressurized system) uses natural circulation to heat water efficiently. In an apricus solar hot water system, water inside the evacuated tubes heats up and rises into the storage tank, while cooler water flows down into the tubes. This continuous, pump-free cycle ensures reliable and energy-saving solar hot water production.

how_does_a_solar_water_heater_work_non_pressure

Solar Water Heater with Assistant (Auxiliary) Tank – Main Function

The assistant tank (3 L / 5 L / 15 L) is a small auxiliary reservoir, typically mounted on the side or top of the main water tank. Its primary role is to automatically replenish the main tank with cold water. When hot water is used, the assistant tank allows gradual refilling, maintaining stable water levels and preventing the main tank from running dry.

assistant_tank_installation_pictures, 5L, full stainless steel model .well installed in Huancayo, Peru

FAQs

1. What is a low-pressurized thermosyphon solar water heater and how does it work?

A low-pressurized thermosyphon solar water heater uses natural circulation between evacuated tubes and the storage tank. Heated water rises into the tank while cooler water flows down, creating a pump-free and energy-efficient solar hot water system.

2. What capacity options are available for stainless steel gravity feed solar water heaters?

Common sizes include 80L to 360L, suitable for residential homes, small commercial use, and off-grid solar water heating applications depending on daily hot water demand.

3. Why choose SUS304 stainless steel tanks in solar water heating systems?

SUS304 stainless steel inner and outer tanks provide strong corrosion resistance, hygienic hot water storage, and long service life, especially in gravity feed and low-pressure solar heating systems.

4. What is the function of an assistant (auxiliary) tank in a solar water heater?

The assistant tank (3L–15L) automatically refills the main tank with cold water during usage, helping maintain stable water levels, protecting evacuated tubes, and preventing dry heating.

5. What are the benefits of evacuated tube solar collectors in low-pressure solar water heaters?

Evacuated tubes offer high thermal efficiency, fast heat absorption, and reliable performance even in colder climates, making them ideal for thermosyphon and apricus solar hot water systems.