Looking for an energy-efficient hot water system for a smaller household?
The OneWave OW150 Solar Water Heater combines a 150-litre pressurized storage tank with 12 evacuated heat-pipe tubes to provide reliable solar hot water for small to medium-sized families.
Designed for up to 4 users, the OW150 is suitable for landed homes, terrace houses, smaller households and properties with moderate daily hot water demand.
Its closed-loop heat-pipe system uses solar energy as the primary heat source, helping homeowners reduce dependence on conventional electric water heating.
Conventional electric water heaters rely entirely on electricity whenever hot water is required.
For households that use hot water every day, this may result in:
A water heating system that is too small may also struggle when several family members shower consecutively.
When a household depends completely on electrical heating, every shower adds to the property’s electricity usage.
The problem may become more noticeable when:
Choosing the correct solar water heater capacity helps balance comfort, energy usage and installation cost.
The OneWave OW150 is designed for households that need a practical, pressurized solar hot water solution without installing an oversized system.
Its key features include:
The system collects solar energy during the day and stores heated water for later use. When solar energy is insufficient, the integrated backup heater can provide additional heating support.
The OW150 provides a 150-litre hot water storage capacity, making it suitable for smaller households with moderate daily usage.
It is recommended for up to four users, depending on:
A site and usage assessment is recommended before installation.
The OneWave OW150 is equipped with 12 evacuated heat-pipe collector tubes.
The tubes absorb solar radiation and transfer heat into the storage tank through conductive copper heat pipes.
This system helps:
Each evacuated tube contains a copper heat pipe that transfers collected solar heat into the storage tank.
Domestic water does not flow directly through the external evacuated tubes.
This provides several practical advantages:
The OneWave OW150 uses a closed-loop indirect heating system.
Instead of allowing household water to flow through the solar collector tubes, heat is transferred through the heat-pipe system into the storage tank.
This design helps provide:
The OneWave OW150 has a manufacturer-stated pressurized tank rating of 850kPa.
This makes it suitable for homes that require stronger and more consistent hot water flow, subject to the existing plumbing configuration.
Actual water flow performance depends on:
The property’s water pressure should be checked before installation.
The OW150 uses a SUS304L stainless steel inner tank for hot water storage.
Its storage tank construction includes:
This construction supports reliable pressurized operation and long-term durability.
The magnesium rod helps protect the inner tank by attracting corrosive elements before they affect the tank body.
Regular inspection and replacement of the magnesium rod, when required, can help:
The storage tank uses 50mm high-density pressure-injected polyurethane foam insulation.
This insulation helps retain stored heat and reduce temperature loss after sunlight hours.
Hot water collected during the day can remain available for evening or early morning use.
During rainy weather, cloudy conditions or higher-than-usual hot water demand, the integrated backup heater can provide additional heating support.
The OW150 includes:
This helps maintain hot water availability when solar energy is temporarily insufficient.
The OneWave OW150 is recommended for:
For households with more than four users or heavier hot water demand, the OneWave OW300 may be more suitable.
| Feature | OW150 | OW300 | OW300 Xtreme |
|---|---|---|---|
| Tank capacity | 150L | 300L | 300L |
| Recommended users | Up to 4 | Up to 7 | Up to 9 |
| Vacuum tube quantity | 12 | 22 | 30 |
| Stated collector efficiency | 90%–94% | 90%–94% | 99% |
| Inner tank material | SUS304L | SUS304L | SUS316L |
| Empty weight | 68kg | 108kg | 118kg |
| Full operating weight | 223kg | 416kg | 426kg |
| Overall dimensions | 1500 × 2000 × 520mm | 2400 × 2000 × 520mm | 2400 × 2000 × 520mm |
Choose the OW150 when:
Choose the OW300 when:
Choose the OW300 Xtreme when:
| Specification | OneWave OW150 |
|---|---|
| Model | OW150 |
| Tank capacity | 150 litres |
| Overall dimensions | 1500 × 2000 × 520mm |
| Empty weight | 68kg |
| Full operating weight | 223kg |
| Recommended users | Up to 4 users |
| Pressurized | Yes |
| System construction | Sealing system |
| Specification | Details |
|---|---|
| Vacuum tube quantity | 12 tubes |
| Manufacturer-stated efficiency | 90%–94% |
| Tube material | Two-layer borosilicate glass, 1.6mm |
| Collector system | Closed-loop system |
| Tube length | 1900mm |
| Outer tube diameter | 58mm |
| Inner tube diameter | 47mm |
| Tube coating | SS-CU-ALN/AIN absorptive coating |
| Heat pipe | Ø8mm TU1 copper |
| Accessories | Backup heater, non-return valves, thermostat and magnesium rods |
| Specification | Details |
|---|---|
| Inner tank diameter | Ø360mm |
| Inner tank material | SUS304L stainless steel |
| Heat exchange socket | SUS304L stamping moulding |
| Outer tank diameter | Ø460mm |
| Outer tank material | 304 stainless steel |
| Insulation material | 50mm high-density pressure-injected polyurethane foam |
| Tank protector | Magnesium rod |
| Temperature and pressure relief valve | 6 bar / 99°C |
| Water inlet and outlet | 3/4-inch stainless steel socket |
| Backup heater system | 3kW DN25 Incoloy 800 heating element |
| Solar controller | Water temperature reading and automatic backup heater |
| Heating configuration | Indirect system |
| Pressurized tank rating | 850kPa |
Yes. The OneWave OW150 is recommended for households with up to four users.
Actual capacity depends on shower duration, hot water temperature, simultaneous usage and total daily consumption.
A 150L solar water heater can be suitable for a small to medium-sized family with up to four users.
Households with longer showers, multiple bathrooms or heavier hot water usage may require a larger model.
The OW150 has:
The OW300 has:
The OneWave OW150 includes a 3kW backup heating element.
When solar energy is insufficient, the controller can activate the backup heater to support the required water temperature.
Yes.
The OneWave OW150 is a pressurized solar water heater with a manufacturer-stated tank pressure rating of 850kPa.
The property’s water pressure and plumbing system should still be assessed before installation.
Household water does not flow directly through the evacuated heat-pipe tubes.
Therefore, damage to an individual collector tube is less likely to cause water loss from the storage tank.
The damaged tube should still be inspected and replaced by a qualified technician.
Yes.
The system includes a 3kW DN25 Incoloy 800 backup heating element to provide additional heating support when solar energy is insufficient.
Not every roof is automatically suitable.
Installation depends on:
The OW150 has a full operating weight of approximately 223kg, so the roof and mounting location should be assessed before installation.
Able Fix provides OneWave solar water heater consultation and installation support across selected locations in:
Our support may include:
Proper system sizing and installation are important for achieving reliable hot water performance.
Choose the OneWave OW150 Solar Water Heater for a practical 150L pressurized hot water system designed for households with up to four users.
Contact Able Fix for product consultation, installation assessment and model recommendations.
+60 12-213 1549
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+60 16-242 1549
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Service Area: Selangor, Kuala Lumpur and selected Klang Valley locations.
Product suitability depends on actual household usage, roof condition, water pressure, plumbing configuration and installation environment. Specifications are subject to the manufacturer’s latest confirmation.
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