SolaX has been in the Australian market for years, mostly through its hybrid inverters, and its Triple Power batteries turn up regularly on quotes we're asked to check. People usually want to know two things: is the battery any good, and does the old LG recall still matter?
SolaX isn't one of the brands we install as standard, so this is an installer's read of the hardware, warranty and support, not a long-term install record. We've built it from SolaX's own published datasheets, product pages and warranty guide, and the ACCC's recall notice, all linked below.
Is a SolaX battery any good?
SolaX's current Triple Power batteries are credible hardware: LFP modules, IP66 on the TSYS-HS51, built-in aerosol fire suppression and a 10-year warranty to 70% of nominal energy. The HS51 stacks 5.1 kWh modules from 10.2 to 66.5 kWh, though only 90% of the headline figure is usable. It pairs with SolaX's own hybrid inverters, which can be installed without a battery and upgraded later. We don't install SolaX as standard, so we can't vouch for its local support from our own experience, and that's why we lead with other brands.
| Verdict at a glance | |
|---|---|
| Our read | Credible hardware with a long Australian presence; not a brand we can vouch for locally |
| Chemistry | LFP (LiFePO4) |
| Main battery | TSYS-HS51: 5.1 kWh modules, 10.2 to 66.5 kWh rated, 90% depth of discharge |
| Ingress rating | IP66 (HS51), IP65 (T-BAT-SYS-HV-S3.6) |
| Warranty | 10 years, 70% of nominal energy or throughput, per SolaX's warranty guide |
| Watch for | Usable vs rated capacity, relocation voids cover, labour usually excluded |
Last updated: 26 October 2026. Specifications come from SolaX Power's Australian product pages, the TSYS-HS51 datasheet (v1.6) and SolaX's battery warranty guide (June 2026). Ask for the Australian warranty certificate for the exact model on your quote.
SolaX Triple Power batteries in Australia
SolaX brands its high-voltage batteries "Triple Power". Its Australian battery page currently lists two residential families.
TSYS-HS51: the main one
Per the TSYS-HS51 datasheet, each module holds 5.1 kWh. A single tower runs from two modules (T-HS10.2) to eight (T-HS40.9), and larger systems of up to thirteen modules (66.5 kWh) use two towers.
The key detail is depth of discharge: 90%. So the usable figure is below the model name:
| Model | Modules | Rated energy | Usable energy (90%) |
|---|---|---|---|
| T-HS10.2 | 2 | 10.2 kWh | 9.1 kWh |
| T-HS15.3 | 3 | 15.3 kWh | 13.7 kWh |
| T-HS20.4 | 4 | 20.4 kWh | 18.3 kWh |
| T-HS25.6 | 5 | 25.6 kWh | 23.0 kWh |
Other datasheet points:
- IP66, rated for indoor or outdoor installation, floor mounted.
- Aerosol fire suppression and a battery heating function.
- Charge and discharge from −20°C to +53°C without heating.
- More than 6,000 cycles at 90% depth of discharge.
- An "optimizer version" that SolaX says can mix new and old modules.
T-BAT-SYS-HV-S3.6: smaller steps
The T-BAT-SYS-HV-S3.6 uses smaller modules to build systems from 7.3 to 47.9 kWh, rated IP65, with aerosol fire suppression and more than 6,000 cycles.
SolaX battery specs compared
| Model | kWh per module | Stackable to | Chemistry | Warranty | Backup |
|---|---|---|---|---|---|
| TSYS-HS51 | 5.1 kWh rated (about 4.6 usable) | 66.5 kWh rated (13 modules) | LFP | 10 yrs, 70% or 16.8 MWh per module | Via SolaX hybrid (EPS) |
| T-BAT-SYS-HV-S3.6 | 3.6 kWh nominal | 47.9 kWh rated | LFP | 10 yrs, 70% or 11.2 MWh per module | Via SolaX hybrid (EPS) |
SolaX inverter review: the hybrid side
The battery is only half the system. SolaX's Australian energy storage inverter range includes:
- X1-Hybrid G4: single-phase, 3 to 7.5 kW.
- X1-VAST: single-phase, 5 to 10 kW.
- X3-Hybrid G4 and X3-HYB-G4 PRO: three-phase, up to 15 kW.
- X3-ULTRA: three-phase, 15 to 30 kW.
- X1-FIT G4 and X3-FIT G4: AC-coupled inverters for adding a battery to an existing solar system.
SolaX says the Hybrid G4 series can be installed without a battery and have one added later, and that two G4 inverters running in parallel must have the same battery model and number of batteries. Those are useful features if you're building in stages.
Can I add a battery to a SolaX inverter?
If it's a SolaX hybrid, usually yes: the Hybrid G4 range is designed to take a SolaX battery later. If it's a plain SolaX string inverter, you add a battery either with an AC-coupled inverter such as the X1-FIT G4, or by replacing it with a hybrid. Which route makes sense depends on the inverter's age and health. Our rule of thumb: a healthy inverter under about eight years old suits an AC-coupled battery; an old or failing one is a good excuse to go hybrid. We cover the decision in adding a battery to existing solar.
Either way, check the exact battery is on SolaX's compatibility list for your inverter model and firmware.
SolaX warranty: what the guide says
SolaX's battery warranty guide gives residential Triple Power batteries a 10-year standard warranty, starting at installation or six months after production, whichever is earlier. The threshold is 70% of nominal energy, or a minimum throughput per module first: 16.8 MWh for the HS51 module. On usable capacity, that's roughly one full cycle a day for ten years.
The conditions that stand out:
- Report fast. SolaX's guide says failures must be reported within four weeks.
- Don't move it. Relocating the battery after first installation voids the warranty unless a qualified installer re-tests it.
- No third-party control. Unauthorised software or hardware controlling charge and discharge is prohibited, so check any home energy manager or VPP is approved.
- Hardware, not labour. SolaX's own guide notes most warranties cover replacement hardware but exclude labour, travel and transport.
- Force majeure. Lightning, flood, surges and pest damage are typically excluded.
- Extended cover. SolaX offers an extended warranty if bought within six months of installation.
That guide is global. Ask your installer for the Australian warranty certificate for your exact model.
The LG battery recall: history worth knowing
On 30 March 2022, SolaX Power Aus Pty Ltd published a recall (PRA 2022/19420) for LG S/A Gen2 batteries it supplied, either on their own or inside SolaX's X-Cabinet, PowerStation and Opal Storage systems, sold between 1 April 2017 and 31 July 2018. The ACCC notice says the batteries could overheat and catch fire, and that incidents caused property damage.
If you have one of those older systems, or are buying a house with one: contact SolaX on 1300 476 529 or lgrecall@solaxpower.com.au, and if the battery is affected, switch it off and keep it off until it's remedied. Affected batteries are replaced free.
Our read: the recall involved LG cells in older SolaX cabinets, not the LFP Triple Power batteries sold today. It's history, but it's the reason to check the serial number on any second-hand or inherited SolaX system.
SolaX battery price on the Sunshine Coast
We don't install SolaX, so we can't give our installed price for it. As a yardstick, here are the bands for the batteries we do install.
Installed battery prices on the Sunshine Coast, as at August 2026, before the rebate:
| Battery size | Installed, before rebate |
|---|---|
| 5 kWh | $8,500–$9,500 |
| 10 kWh | $13,000–$14,500 |
| 15 kWh | $17,500–$19,500 |
The federal Cheaper Home Batteries Program pays roughly $252 per usable kWh for the first 14 kWh since 1 May 2026. Because the HS51 runs at 90% depth of discharge, compare quotes on usable capacity: a T-HS15.3 has 13.7 kWh usable, which at that rate is worth about $3,450 as illustrative arithmetic. The rate steps down every six months.
SolaX vs Sigenergy
Both offer LFP batteries with three-phase options up to 30 kW. The difference is architecture and our relationship with them. SolaX uses a separate battery tower and hybrid inverter; Sigenergy's SigenStor puts the inverter, battery modules and an optional DC EV charger in one stack, and it's a brand we install. Sigenergy sits at the premium end on price. Our Sigenergy battery review covers it in full, including its own 2025 recall.
The Sunshine Coast angle
- Salt air. The HS51's IP66 rating is better than IP65, but on a beachfront street we'd still put it under cover and out of the spray.
- Heat. The HS51's operating range tops out at 53°C. A shaded garage wall beats a western wall in summer sun.
- Floor mounting. The HS51 is floor mounted, so in low-lying, flood-prone spots, think about where it sits.
- Storm backup. Backup comes from the hybrid's EPS output and covers the circuits wired to it. Ask which ones.
- Grid connection. Energex approves the connection and sets export limits before installation, confirmed at application.
- Local support. Ask the installer who handles a claim on the Sunshine Coast and how many SolaX systems they service.
Who SolaX suits, and who should skip it
A SolaX battery could suit you if you:
- Already own a SolaX Hybrid G4 inverter and want to add matched storage
- Have an installer with a strong SolaX service record nearby
- Want large modular capacity on three phase
Look somewhere else if you:
- Want an all-in-one cabinet with whole-home bypass or built-in EV charging
- Might move the battery later, since relocation voids cover without a re-test
- Want a brand your local installer has years of warranty history with
What we'd install instead
If you're starting fresh rather than adding to an existing SolaX inverter, we'd usually point you to a GoodWe ESA, which puts the inverter and IP66 battery modules in one cabinet with a 63A whole-home bypass (see our GoodWe battery review), or a Deye high-voltage stack for the best capacity per dollar (see our Deye battery review). Our battery installation service on the Sunshine Coast sizes the system from your evening usage first, then picks the brand.
Frequently asked questions
Can I add a battery to a SolaX inverter?
Yes, in most cases. A SolaX Hybrid G4 inverter can take a compatible SolaX battery later, and SolaX says the G4 can be installed without a battery for exactly that reason. If you have a SolaX string inverter, you'd add an AC-coupled inverter such as the X1-FIT G4 or replace it with a hybrid. Check the battery is on SolaX's compatibility list for your exact inverter.
Which brand of solar battery is best?
There isn't one best brand for every home. The right battery depends on your evening usage, single or three-phase supply, backup needs, budget and the installer's local support. We install Deye, Sigenergy, Sungrow, GoodWe, Alpha ESS and others, and rank them by use case in our guide to the best solar battery in Australia.
Is SolaX a good battery?
The current Triple Power batteries are credible: LFP chemistry, IP66 on the HS51, aerosol fire suppression and a 10-year warranty to 70%. Two things to know are that usable capacity is 90% of the rated figure, and that the warranty is voided by relocation without a re-test. We don't install SolaX as standard, so we can't vouch for its local support from our own experience.
Does the old SolaX LG recall affect new batteries?
No. The 2022 recall covered LG S/A Gen2 batteries sold between April 2017 and July 2018, including those inside SolaX's X-Cabinet, PowerStation and Opal Storage systems. Current Triple Power batteries use LFP cells. If you own or are buying a home with an older SolaX system, check the serial number with SolaX.
