Details
OneWave OW300 Solar Water Heater Malaysia
300L Pressurized Solar Hot Water System for Up to 7 Users
Need more hot water for a growing family?
The OneWave OW300 Solar Water Heater combines a large 300-litre storage tank with 22 evacuated heat-pipe tubes to provide a more reliable and energy-efficient hot water supply for medium to large households.
Designed for up to 7 users, the OW300 is suitable for landed homes, double-storey houses, semi-detached properties and households with higher daily hot water demand.
Its pressurized, closed-loop system helps deliver consistent hot water while reducing dependence on conventional electric water heating.
Not Enough Hot Water for the Whole Family?
When several family members shower one after another, a smaller water heater may struggle to maintain sufficient hot water.
Common household problems include:
- Hot water running out during peak hours
- Water temperature dropping after several showers
- Slow reheating between users
- Frequent use of the electric backup heater
- Higher electricity consumption
- Insufficient hot water for multiple bathrooms
A larger storage tank alone may not solve the problem. The solar collector capacity must also be suitable for the household’s actual daily hot water usage.
Higher Hot Water Demand Can Increase Electricity Usage
When the solar collector cannot generate enough heat, the backup heater may operate more frequently.
This may lead to:
- Increased electricity usage
- Longer recovery time during cloudy weather
- Inconsistent water temperature
- Reduced energy-saving benefits
- More inconvenience during morning and evening peak periods
Older or poorly designed solar water heater systems may also experience heat loss, corrosion or water leakage over time.
Choosing the right capacity and collector system is therefore important for long-term performance.
The Solution — OneWave OW300
The OneWave OW300 is designed to support households with higher daily hot water requirements.
Its key features include:
- 300-litre storage tank
- Suitable for up to 7 users
- 22 evacuated heat-pipe tubes
- 90%–94% manufacturer-stated collector efficiency
- Pressurized hot water system
- Closed-loop solar collector design
- Indirect heating system
- SUS304L stainless steel inner tank
- 50mm high-density insulation
- Automatic backup heating
- Water temperature controller
- Magnesium rod tank protection
The system uses solar energy as its primary heat source, with an integrated backup heater providing additional support when solar energy is insufficient.
Key Benefits of the OneWave OW300
300L Capacity for Up to 7 Users
The OneWave OW300 provides a 300-litre hot water storage capacity for medium to large families.
It is recommended for up to seven users, depending on:
- Shower duration
- Water temperature setting
- Number of bathrooms
- Simultaneous hot water usage
- Weather conditions
- Daily household consumption
A proper site and usage assessment is recommended before installation.
22 Evacuated Heat-Pipe Tubes
The OW300 is equipped with 22 evacuated heat-pipe collector tubes.
These tubes absorb solar energy and transfer the collected heat into the storage tank.
The larger solar collection area helps the system:
- Heat water more efficiently
- Improve recovery after repeated usage
- Reduce reliance on electric heating
- Support higher household hot water demand
Efficient Heat-Pipe Technology
Each evacuated tube contains a conductive copper heat pipe.
The vacuum tube absorbs solar energy, while the copper heat pipe transfers that heat into the pressurized water heater tank.
Because household water does not flow directly through the collector tubes, the system offers several advantages:
- Lower risk of water leakage from a damaged tube
- Individual tube operation
- Easier tube replacement
- Improved pressurized operation
- Reduced direct contact between household water and collector components
Closed-Loop Indirect Heating System
The OneWave OW300 uses a closed-loop indirect heating system.
Household water does not flow directly through the evacuated collector tubes. Instead, solar heat is transferred into the storage tank through the heat-pipe system.
This design helps provide:
- Better system reliability
- Reduced risk of collector leakage
- More stable heat transfer
- Easier maintenance
- Improved suitability for pressurized plumbing systems
Pressurized Hot Water Supply
The OneWave OW300 has a manufacturer-stated pressurized tank rating of 850kPa.
This makes it suitable for households that require stronger and more consistent hot water flow.
Actual performance will depend on the property’s:
- Incoming water pressure
- Water pump configuration
- Pipe diameter
- Plumbing condition
- Number of outlets used simultaneously
The existing plumbing system should be assessed before installation.
SUS304L Stainless Steel Inner Tank
The OneWave OW300 uses a SUS304L stainless steel inner tank.
The tank construction includes:
- SUS304L inner tank
- SUS304L heat exchange socket
- 304 stainless steel outer casing
- Magnesium rod protection
- Temperature and pressure relief valve
This construction supports long-term durability and pressurized hot water storage.
Magnesium Rod Tank Protection
A magnesium rod is installed to help protect the inner tank from corrosion.
The magnesium rod attracts corrosive elements that may otherwise affect the storage tank.
Regular inspection and replacement of the magnesium rod, when required, can help:
- Protect the inner tank
- Reduce corrosion
- Extend the system’s operating life
- Maintain long-term performance
50mm High-Density Tank Insulation
The storage tank uses 50mm high-density pressure-injected polyurethane foam insulation.
This insulation helps reduce heat loss and retain the stored water temperature for longer periods.
This means hot water collected during the day can remain available for evening or early morning use.
Automatic Backup Heating Support
During rainy weather, extended cloudy conditions or unusually high hot water demand, the integrated backup heater can provide additional heating support.
The OneWave OW300 includes:
- 3kW DN25 Incoloy 800 backup heating element
- Water temperature reading
- Automatic backup heater control
- Thermostat
- Temperature and pressure protection
This helps maintain a more reliable hot water supply when solar energy is temporarily insufficient.
Who Is the OneWave OW300 Suitable For?
The OneWave OW300 is recommended for:
- Households with up to 7 users
- Medium to large families
- Double-storey landed homes
- Semi-detached houses
- Homes with multiple bathrooms
- Households with higher daily shower usage
- Homeowners upgrading from a smaller solar heater
- Properties requiring pressurized hot water
For households with up to nine users or heavier hot water demand, the OneWave OW300 Xtreme may be more suitable.
OneWave OW300 vs OW300 Xtreme
| Feature | OneWave OW300 | OneWave OW300 Xtreme |
|---|---|---|
| Tank capacity | 300L | 300L |
| Recommended users | Up to 7 users | Up to 9 users |
| Vacuum tube quantity | 22 tubes | 30 tubes |
| Stated collector efficiency | 90%–94% | 99% |
| Inner tank material | SUS304L | SUS316L |
| Empty weight | 108kg | 118kg |
| Full operating weight | 416kg | 426kg |
| Overall dimensions | 2400 × 2000 × 520mm | 2400 × 2000 × 520mm |
H3: Which OneWave Model Should You Choose?
Choose the OneWave OW300 when:
- The household has up to seven users
- Daily hot water demand is moderate to high
- A 300L pressurized system is required
- The property has suitable roof space for 22 collector tubes
Choose the OneWave OW300 Xtreme when:
- The household has up to nine users
- Hot water usage is heavier
- Faster solar heat recovery is preferred
- A higher collector capacity is required
OneWave OW300 Product Specifications
H3: General Specifications
| Specification | OneWave OW300 |
|---|---|
| Model | OW300 |
| Tank capacity | 300 litres |
| Overall dimensions | 2400 × 2000 × 520mm |
| Empty weight | 108kg |
| Full operating weight | 416kg |
| Recommended number of users | Up to 7 users |
| Pressurized | Yes |
| System construction | Sealing system |
Solar Tube Collector Specifications
| Specification | Details |
|---|---|
| Vacuum tube quantity | 22 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 |
Storage Tank Specifications
| 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 |
Frequently Asked Questions
Is the OneWave OW300 Suitable for Seven People?
Yes. The OneWave OW300 is recommended for households with up to seven users.
Actual capacity depends on shower duration, hot water temperature, simultaneous usage and total daily consumption.
Is a 300L Solar Water Heater Enough for a Large Family?
A 300L solar water heater can be suitable for a medium to large family when the collector capacity matches the household’s usage.
The OneWave OW300 combines a 300L tank with 22 evacuated heat-pipe tubes and is recommended for up to seven users.
What Is the Difference Between OW300 and OW300 Xtreme?
Both models use a 300-litre tank.
The standard OW300 has:
- 22 evacuated heat-pipe tubes
- Capacity for up to 7 users
- SUS304L inner tank
- 90%–94% stated collector efficiency
The OW300 Xtreme has:
- 30 evacuated heat-pipe tubes
- Capacity for up to 9 users
- SUS316L inner tank
- 99% stated collector efficiency
H3: What Happens During Rainy or Cloudy Weather?
The OneWave OW300 includes a 3kW backup heating element.
When solar energy is insufficient, the controller can activate the backup heater to support the required water temperature.
Is the OneWave OW300 a Pressurized Solar Water Heater?
Yes.
The OneWave OW300 is a pressurized solar water heater with a manufacturer-stated tank pressure rating of 850kPa.
The property’s incoming water pressure and plumbing condition should still be checked before installation.
Will Water Leak If One Evacuated Tube Breaks?
The system uses independent heat-pipe evacuated tubes.
Household water does not flow directly through the collector tubes. Therefore, a damaged 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.
Does the OneWave OW300 Include an Electric Backup Heater?
Yes.
The system includes a 3kW DN25 Incoloy 800 backup heating element to provide additional heating support when solar energy is insufficient.
Can the OneWave OW300 Be Installed on Any Roof?
Not every roof is automatically suitable.
Installation depends on:
- Roof condition
- Roof structure
- Available installation space
- Sunlight exposure
- Building orientation
- Shading from trees or nearby buildings
- Plumbing distance
- Safe maintenance access
The OW300 has a full operating weight of approximately 416kg, so the roof and mounting area should be assessed before installation.
Solar Water Heater Installation in Selangor and Kuala Lumpur
Able Fix provides solar water heater consultation and installation support across selected locations in:
- Selangor
- Kuala Lumpur
- Klang Valley
Our solar water heater support may include:
- Household hot water usage assessment
- Product and model recommendation
- Roof and installation assessment
- Plumbing connection
- Water pressure checking
- Solar controller setup
- Backup heater connection
- Testing and commissioning
- Maintenance and replacement support
Proper system sizing and installation are important for achieving reliable hot water performance.
Get Reliable Solar Hot Water for Your Home
Upgrade to the OneWave OW300 Solar Water Heater for greater storage capacity, pressurized hot water and dependable daily performance for up to seven users.
Contact Able Fix for product consultation, installation assessment and model recommendations.
WhatsApp Able Fix
+60 12-213 1549 Chat on WhatsApp
+60 16-242 1549 Chat on WhatsApp
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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