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Heater solar water 2
High-quality, cost-effective evacuated tube non-pressurized solar water heater with color steel outer tank, three-target vacuum tubes, optional 15L assistant tank, and TK-8A/TK-7 controller. Reliable solar water heating with warranty.
A solar water trough heater uses sunlight to warm water for livestock—reducing energy costs and preventing freezing in cold climates. It is a reliable, eco-friendly solution for farms and ranches, ensuring animals always have access to warm drinking water. Efficient, low maintenance, and ideal for remote areas without grid power.
| Item No. | Qty /【pcs】 | Size /【mm】 | 【M2】 | 【M2】 | 【L】 | 【Sets】 |
| RE-100L | 10 | Φ58 X 1800 | 0.94 | 1.33 | 100.00 | 180.00 |
| RE-120L | 12 | Φ58 X 1800 | 1.13 | 1.60 | 120.00 | 150.00 |
| RE-150L | 15 | Φ58 X 1800 | 1.41 | 2.00 | 150.00 | 120.00 |
| RE-180L | 18 | Φ58 X 1800 | 1.68 | 2.39 | 180.00 | 100.00 |
| RE-200L | 20 | Φ58 X 1800 | 1.87 | 2.66 | 200.00 | 90.00 |
| RE-240L | 24 | Φ58 X 1800 | 2.25 | 3.19 | 240.00 | 75.00 |
| RE-300L | 30 | Φ58 X 1800 | 2.81 | 3.99 | 300.00 | 60.00 |
| RE-360L | 36 | Φ58 X 1800 | 3.37 | 4.79 | 360.00 | 50.00 |
| Solar Water Heater-Water Tank | ||
| 1 | Material of out tank | Zinc coated galvanized steel (PVDF)/SUS-201 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 | 460/360mm or 470/360mm |
| 7 | Welding: | Argon arc welding |
| 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 |
| Bracket | ||
| 22 | Bracket: | Coated Stronger galvanized steel-1.5mm |
| 23 | Bracket angle: | 25/38/45 degree flat roof |
| 24 | Fastening pieces: | Stainless steel. |
● Inner tank: stainless steel SUS304-0.38/0.45mm
● Vacuum tube: Cu/SS-ALN(H)/SS-ALN(L)/ALN 58-1800mm
● Outer tank shell: Zinc coated galvanized steel (PVDF) or Galvanized Steel
● Insulation: high density polyurethane,50/55/60mm
● Frame: coated galvanized steel-1.5mm
● Use the sun to warm your water. Save up to $579 per year!!
This low-pressure RIWATT solar water heater uses 58×1800 mm evacuated tubes to absorb sunlight and convert it into heat.
Through natural thermo-syphon circulation, heated water rises into the stainless-steel inner tank, while cooler water flows back into the tubes for continuous heating.
The galvanized steel outer shell protects the system from corrosion, ensuring long outdoor durability.
As a gravity-feed solar water heating system, it delivers stable hot water without pressure load, providing efficient, safe, and cost-effective hot water solar heat for homes.
● Trough
● livestock
● Apartments
● Houses
● Villas
● Small residences
● Hotel rooms
● Guest houses / lodges
● Business buildings
● Staff dormitories
● Showers and baths
● Kitchen dishwashers
● Washing machines
● Hot spas and jacuzzis
● Swimming pools
● Salon / beauty shop hot-water supply
● Small commercial hot-water applications
● Increase capacity in series: higher temperature output
● Increase capacity in parallel: larger volume for multiple users
● Flexible configuration for both home and commercial RIWATT solar water heating systems
A Solar Water Trough Heater uses the sun’s thermal energy to heat water in a trough or tank. It typically consists of solar collectors, a water storage tank, and circulation system. Sunlight is absorbed by the collector, transferring heat to the water, providing an energy-efficient way to supply hot water for livestock, irrigation, or industrial use.
Yes! Most solar water trough heaters are designed with insulated tanks and efficient solar collectors that can still heat water on cloudy days. In colder climates, some systems include backup electric or gas heating to ensure a consistent water temperature.
Maintenance is minimal. Regularly check for debris on solar collectors, inspect pipes for leaks, and ensure the water tank is clean. Periodic inspection ensures optimal efficiency and long-lasting performance, typically requiring just a few checks per year.
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