Note: Solar Choice is not affiliated with Solax or any other battery manufacturer. Our reviews are independently written using technical documentation and industry analysis.
At a Glance: SolaX Batteries score 2.9 out of 5
Scoring is based on our solar battery scorecard, which is consistently applied to each brand and battery available on the Australian market. This scoring reflects SolaX’s Triple Power and related battery systems.
$$ Price: Based on data from Solar Choice’s network of solar installers, the average price for an installed SolaX battery is $900–$1,050 per usable kWh, making it one of the lower-cost batteries available on the market.
- Company Backing and Trustworthiness (2 out of 5): SolaX has been operating in Australia since 2018, but it has no confirmed office or dedicated support team. This limits its company backing score despite some brand familiarity.
- Warranty Offer (2.5 out of 5): SolaX batteries come with a throughput warranty of 3.46MWh per usable kWh, a 10-year product warranty, and a minimum capacity rating of 70% at the end of the warranty period. This puts it in the middle of the pack in terms of long-term performance coverage.
- Customer Reviews (5 out of 5): SolaX has received generally positive feedback, with a verified average rating of 4.71 from 7 reviews on Solar Choice’s independent platform. This earns the maximum score for customer satisfaction.
- Functionality (2 out of 5): SolaX batteries are IP65 rated and support modular stacking. However, they lack AC coupling, fire suppression, and modular battery balancing, meaning performance may degrade when older and newer batteries are mixed in the same system. These limitations reduce long-term flexibility and resilience.
Background on SolaX – Company History
Solax Battery Range and Options
Solax’s battery offerings are built around its high-voltage, lithium iron phosphate (LiFePO4) modular storage platform, the T-BAT HS series. Solax uses two main module sizes — 3.6kWh and 5.1kWh — which can be stacked into systems ranging from approximately 7kWh to nearly 48kWh. Both battery options are DC-connected meaning they need to be installed alongside a compatible Solax inverter.
T-BAT HS (3.6kWh modules)
The smaller of the two options, this system uses 3.6kWh nominal battery modules (3.2kWh usable). Multiple modules can be stacked vertically to create a flexible storage system:
- System sizes: From 7.37kWh to 47.92kWh nominal (6.6kWh to 43.1kWh usable)
- Voltage range: 102.4V to 665.6V
- Max power output: Up to 33.2kW with larger stacks
- Depth of discharge: 90%
- IP rating: IP65
- Installation: Floor-standing, indoor or outdoor
These batteries are suitable for residential and light commercial systems, with optional parallel connection using a two-in-one cable to extend capacity and lifespan. The stackable format and soft-start technology offer practical protection and expandability.
T-BAT HS (5.1kWh modules)
This system uses 5.1kWh nominal modules (4.6kWh usable) and also scales from a single unit to a 30.7kWh system (27.6kWh usable):
- Popular system sizes: 5.1kWh to 30.7kWh nominal
- Operating voltage range: 90V to 696V
- Max output per module: 5.1kW max discharge
- Depth of discharge: 90%
- IP rating: IP66
- Cooling: Natural convection
- Installation: Floor or wall-mountable
This version is designed for flexibility in installation, especially where wall space is available. The T-BAT HS 5.1kWh modules are a common choice for hybrid inverters in residential systems with modest to high storage needs.
Solax Battery Technical Specifications – Common Setups
| Feature | T-BAT HS10 (2 x 5.1kWh) | T-BAT HS10.8 (3 x 3.6kWh) |
|---|---|---|
| Battery Chemistry | LiFePO₄ | LiFePO₄ |
| Usable Capacity (kWh) | 9.2 | 10.0 |
| Nominal Capacity (kWh) | 10.2 | 10.8 |
| Scalability | 5.1kWh to 30.7kWh | 7.2kWh to 47.9kWh |
| Depth of Discharge | 90% | 90% |
| Max Discharge Power | 5.1kW | 7.6kW |
| IP Rating | IP66 | IP65 |
| Cooling | Natural Convection | Natural Convection |
| Installation | Wall or Floor Mounted | Floor Mounted |
| Temperature Range (°C) | -30 to 53 (with heating) | -30 to 53 (with heating) |
How Much Does a Solax Battery Cost?
Solax batteries are generally priced in the lower cost range of the Australian market. Based on recent data from Solar Choice’s installer network, the average installed cost of a Solax battery system is approximately $900–$1,050 per usable kWh.
Examples:
- A 9.2kWh T-BAT HS10 system might cost $9,000–$9,800 installed
- A 27.6kWh T-BAT HS30 system could cost $24,000–$27,000 installed
Compare quotes from up to 7 installers in your area now.
Australian warranty terms for SolaX Triple Power battery
Solax provides a 10-year product and performance warranty on all T-BAT HS systems.
10 year performance guarantees:
- Minimum retained capacity: 70% after 10 years
- Minimum throughput (minimum total energy discharged over 10 years):
- T-BAT HS5 (5.1kWh nominal / 4.6kWh usable) → 15.9MWh → 3.46 MWh per usable kWh
- T-BAT HS10 (10.2kWh nominal / 9.2kWh usable) → 31.8MWh → 3.46 MWh per usable kWh
- T-BAT HS30 (30.7kWh nominal / 27.6kWh usable) → 95.4MWh → 3.46 MWh per usable kWh
These figures translate to roughly 1.3 full cycles per day, which is above average among comparable residential battery systems.
Key Warranty Terms:
- Must be installed by a certified Solax installer and registered via Solax Cloud
- Expansion with new modules is supported within 1 year of initial install. After this period, voltage matching and approval are required.
- Off-grid systems must be inspected annually
Pros and Cons of SolaX Batteries
| Pros | Cons |
| ✓ Flexible, modular high-voltage design with wide capacity range (7kWh–48kWh) | ✗ Expansion beyond 1 year requires approval and careful commissioning |
| ✓ IP65/66 ratings – safe for sheltered outdoor use | ✗ No AC-coupled option |
| ✓ 10-year warranty with solid throughput allowance | ✗ No listed Australian office in Solax’s name |
| ✗ Off-grid systems require annual inspection |
Conclusion: Our Verdict On Solax Batteries
Solax’s T-BAT HS battery series is a well-rounded, scalable storage option that fits neatly with their hybrid inverter ecosystem. The batteries have a IP65 or IP66 rating and can be expanded to around 48kWh which fits well with the federal battery rebate. The technical capabilities of the battery stack up fairly well against mid-range options in the market.
The main concern we have is the lack of local of local support for their customers with the ‘Australian office’ on their website relates to a solar equipment distributor.
Since 2008 our knowledge and sophisticated software has allowed over 300,000 Australian households and businesses to make a well-informed choice on their solar & battery installer.
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Reviews from Australians who have installed SolaX Batteries
Very good, I’m going to have another one installed
Review left 7 years after system installed
Very happy with Solax overall. Reliability has been good, with a problem at 3 years old being rectified (replaced with newer technology unit at no cost) promptly.
Good product, Good Software, Good Warranty, Good Price
Review left 2 years after system installed
3x8Kw batteries discharge too quickly- suspect the inverter is the problem.
Review left 2 years after system installed
Good now but no one knew what they were doing at the time .Installation rough as you no have no idea and nothing fixed yet they do not even make a reply except intimidation.
Also works brilliantly!
