72 Hours 100L 200L China Hot Selling Homemade Compact Non-pressure Solar Water Heater to Water Calentadores De Agua Solares

Product Description

Solar Water Heater System Banner
Products Description
Compact non pressure solar water heater relies on the nature circulation of the water between solar tubes and the water tank. Thermosyphon systems work on principal of heat rising. The water enters in the bottom of the collector and rises to the tank as it warms. The advantage of this system is that solar heat is stored in a well-insulated tank, so hot water can be used at any time without the penalty of overnight losses.
Moreover the insulation of the tank can protect heat during 3 days without heat loss.
Solar Water Heater Structure
Solar Water Heater Component 1
Solar Water Heater Component 2
Solar Water Heater Component 3
Solar Water Heater Component 4
Solar Water Heater Component 5
Solar Water Heater Component 6
Features of Solar Water Heater
  • Cheap and reliable solution, Simple structures, Easy installation.
  • High efficiency of heating, water heated by sun light directly.
  • Withstands water pressure no more than 0.1MPa.
  • Operated without any power supplying.
  • Electric heater can be used as back-up in rainy days.
  • Hot water can be used directly, or can be used as a pre-heated.
  • Water flow in the vacuum tubes and is operated when confined.
  • Tank is equipped with electric water heater setting, automatic temperature controller (optional).
  • The insulating layer uses polyurethane bulk bubble, keep hot water 72 hours.
Product Details Of Solar Water Heater
MODEL NO. Absorbing Area (m²) Vacuum Tube Tank Capacity (Liter) Qty per 20GP/40HQ Container (set)
Diameter (mm) Length (mm) No. (pcs)
ENSUN-CNP80-58/1.8 0.8 58 1800 8 80 92/235
ENSUN-CNP100-58/1.8 0.8 58 1800 10 100 78/200
ENSUN-CNP120-58/1.8 0.96 58 1800 12 120 68/170
ENSUN-CNP150-58/1.8 1.9 58 1800 15 150 55/141
ENSUN-CNP180-58/1.8 2.16 58 1800 18 180 48/118
ENSUN-CNP200-58/1.8 2.4 58 1800 20 200 42/108
ENSUN-CNP240-58/1.8 2.8 58 1800 24 240 36/90
ENSUN-CNP300-58/1.8 3.6 58 1800 30 300 28/70
ENSUN-CNP360-58/1.8 4.3 58 1800 36 350 24/62
Technical Parameters & Materials
Material of inner tank 0.31mm-0.5mm thickness, food grade SUS304-2B or SUS316L
Material of outer tank 0.4mm thickness, colorful steel
Insulating layer 50-55mm thickness, 45kg/m³ high density polyurethane foamed
Inlet and outlet hole Male G 1/2, 3/4......
Max. pressure 0.05Mpa
Solar collector tube 3.3 Borosilicate glass with Cu-SS-ALN/ANL. coating
Thickness of glass tube 1.6mm/1.8mm/2.0mm/2.2mm
Vacuum tube tightness P ≤ 0.005 Pa
Average heat loss coefficient ULT = 0.6~0.7W/(m².C)
Bracket(frame) 1.5mm galvanized steel
Frame angle 20/38/45 degrees
Structure of tank 5 holes for air vent, overflow, water inlet and outlet, electric heater
Welding Argon arc welding
Fastening pieces Made of stainless steel screw
Tank capacity From 50-500L
Solar Heater Detail A
Solar Heater Detail B
Solar Heater Detail C
Solar Heater Detail D
Solar Heater Detail E
Solar Heater Detail F
Solar Heater Detail G
Solar Heater Detail H
Solar Heater Detail I
Solar Heater Detail J
Pre-sale Service
  • Sample can be offered with sample charge and courier fee by buyer's side.
  • We have full stock, and can deliver within short time. Many styles for you to choose.
  • OEM and ODM order are accepted, Any kind of logo printing or design are available.
  • Good Quality + Factory Price + Quick Response + Reliable Service, is what we are trying best to offer you.
  • All of our products are produced by our professional workman and we have our high-work-effect foreign trade team, you can totally believe our service.
  • We have rich experience of design, manufacture and sell solar water heater, we cherish every order from our honor.
After You Choose
  • We will count cheapest shipping cost and make invoice to you at once.
  • Check quality again, then send out to you at 1-2 working day after your payment.
  • Email you the tracking no, and help to chase the parcels until it arrive you.
After-sale Service
  • We are very glad that customer give us some suggestion for price and products.
  • If any question, please contact with us freely by E-mail or Telephone.
Frequently Asked Questions
1. How does a compact non-pressure solar water heater work?
It operates on the principle of thermosyphon circulation. Water in the solar vacuum tubes heats up from solar radiation, becomes lighter, and naturally rises into the water storage tank. Meanwhile, colder water from the tank flows down into the tubes to repeat the process.
2. How long can the insulated tank keep the water hot?
The tank features a high-density, 50-55mm thick polyurethane insulation layer. This allows the system to preserve hot water for up to 72 hours (3 days) without significant heat loss, even overnight or during cooler periods.
3. What happens on cloudy or rainy days when there is no sun?
An optional electric backup heater can be installed. In the event of prolonged rainy or cloudy weather, the automatic temperature controller will activate the electric heater to ensure you always have access to hot water.
4. Can this system handle pressurized household water grids?
This is a non-pressure solar water heater system designed to operate under gravity flow, and it withstands water pressure of no more than 0.1MPa (normally operating around 0.05Mpa). If high-pressure water output is needed, pressure-reducing valves or alternative pressure systems should be considered.
5. What durable materials are used in its construction?
The inner water tank is manufactured from food-grade SUS304-2B or SUS316L stainless steel (0.31mm-0.5mm thickness) to prevent rust and contamination. The outer structure employs a colorful steel shell, and the structural frame is built from 1.5mm thick galvanized steel.
6. Is the system difficult to install and maintain?
No, it is highly valued for its simple design and reliability. Because it does not rely on complex pump systems or electrical controllers for standard heating, installation is straightforward, and long-term maintenance requirements are minimal.

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