Sigenergy Three-Phase Battery: The SigenStor TP Explained (2026)

If your home has three-phase power, choosing a battery is a different exercise from the single-phase mainstream, and getting it wrong means paying for backup that only covers a third of your house. The Sigenergy SigenStor comes in a three-phase version, the TP, built specifically for this. This guide explains what the TP is, why three-phase matters for a battery, the recall exemption that favours it, and whether you actually need it.

What three-phase power is

Most Australian homes run on single-phase supply: one active wire delivering power, typically up to about 7 to 10 kW. Three-phase supply brings three active wires, each carrying its own phase of power, for roughly three times the capacity. It is common in larger or newer homes, rural properties, and any house with heavy loads like ducted air conditioning, a pool, a workshop, or three-phase EV charging.

The reason it matters for a battery is simple: your loads are spread across those three phases. A battery has to be able to supply all three to run your whole home, especially in a blackout.

The SigenStor TP: specs that matter

The SigenStor TP pairs a three-phase energy controller with the same modular LFP battery blocks as the single-phase SP. Here is how the two compare.

Spec	SigenStor SP (single-phase)	SigenStor TP (three-phase)
Phase	Single-phase	Three-phase
Usable capacity	15.6 kWh (modular)	15.6 kWh (modular)
Continuous power	5 kW	10 kW
Peak power	10 kW	15 kW
Coupling	AC + DC	AC + DC
Chemistry	LFP	LFP
IP rating	IP66	IP66
AI energy management	Yes	Yes
Affected by 2025 recall	Some units	No

The capacity, chemistry, weatherproofing and AI are identical. The differences that count are output and phase: the TP delivers double the continuous power and spreads it across three phases, which is exactly what a large or three-phase home needs.

Why three-phase output matters for backup

This is the crux. A single-phase battery installed on a three-phase home can only back up the single phase it is connected to. In a blackout, everything wired to the other two phases stays off, which can mean half your lights, some power points, and often the air conditioning are dark even though the battery is full.

The three-phase SigenStor TP backs up all three phases together. Combined with the backup gateway, it can island the whole home and keep three-phase loads running, ducted air conditioning, three-phase EV charging, pumps, during an outage. At 10 kW continuous, it has the output to do it for a genuinely large home, not just an essentials sub-board.

For everyday bill-shifting, the phase question matters less, because you are drawing modest power. It is backup, and running big simultaneous loads, where three-phase earns its cost.

The recall exemption: a real advantage for TP buyers

There is a specific reason three-phase buyers can specify a SigenStor with extra confidence in 2026. The voluntary ACCC recall published on 19 November 2025 applied only to certain single-phase energy controllers, over an AC-plug that could overheat. Three-phase TP units were never affected.

So while single-phase SP buyers should confirm their controller has the updated connector from the recall remedy, three-phase buyers simply do not have that concern. It is one less variable in the quote. The full recall detail is in our Sigenergy SigenStor review.

What the three-phase premium costs

The TP costs roughly $2,000 to $3,000 more than the SP for the same battery capacity, and almost all of that sits in the three-phase energy controller rather than the battery modules. On our Sigenergy price list, a 16 kWh system lands around $10,500 to $13,500 after the rebate; a three-phase build sits toward and above the upper end of that.

The federal Cheaper Home Batteries Program rebate is calculated on usable capacity, not phase, so a TP earns the same rebate as an SP of the same size. You are paying the premium for output and balanced backup, not losing any subsidy.

Do you actually need three-phase?

The answer follows your supply and your goals.

Choose the SigenStor TP if your home has three-phase supply and you want proper whole-home backup, you run three-phase loads like ducted air conditioning or a three-phase EV charger, or you have a large home where the SP’s 5 kW output would be limiting. In these cases the TP is the correct tool, not an upgrade.

Stay with the SigenStor SP if your home is single-phase, which covers most Australian houses. There is no benefit to a three-phase controller without three-phase supply, and the SP is the right-priced choice. If you are unsure which supply you have, your switchboard or electricity bill will confirm it.

Some households on the fence about an EV or ducted air conditioning choose to upgrade their supply to three-phase and fit a TP at the same time, which can be cheaper than doing the two jobs separately. That is worth pricing if a major electrical upgrade is already on the cards. To size the battery itself, see our guide to what size Sigenergy battery you need.

How the TP compares to rivals

For a three-phase home, the TP’s 10 kW continuous output is a genuine strength. A single-phase Tesla Powerwall 3 leads the single-phase field at 11.5 kW, but backing up a three-phase home with Powerwalls means multiple units and careful configuration, where the TP does it as one integrated three-phase system. That is the crux of our Sigenergy vs Tesla Powerwall 3 comparison: on single-phase homes the Powerwall’s output wins, and on three-phase homes the SigenStor TP is the one to beat.

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Common questions

Does Sigenergy make a three-phase battery?

Yes. The SigenStor TP is the three-phase version, built around a three-phase energy controller that delivers 10 kW continuous and 15 kW peak. It uses the same modular battery blocks as the single-phase SP, so you get the same capacities with much higher output, suited to larger and three-phase homes.

Do I need a three-phase battery for a three-phase home?

Usually yes if you want proper whole-home backup. A single-phase battery on a three-phase home backs up only one of the three phases, so loads on the other two stay dark in an outage. The three-phase SigenStor TP backs up all three phases, which is why it suits homes with three-phase supply.

Is the SigenStor TP affected by the Sigenergy recall?

No. The November 2025 ACCC recall applied only to certain single-phase energy controllers with an AC-plug fault. Three-phase SigenStor TP units are not affected. If you have three-phase supply, this is one less thing to worry about when specifying the system.

How much more does the three-phase Sigenergy cost?

The three-phase SigenStor TP typically costs about $2,000 to $3,000 more than the single-phase SP for the same battery capacity, almost all of it in the energy controller. For a large or three-phase home that needs the higher output and balanced backup, the premium is usually worth it.

What is the difference between the SigenStor SP and TP?

The SP is single-phase, delivering 5 kW continuous and 10 kW peak, for typical homes. The TP is three-phase, delivering 10 kW continuous and 15 kW peak, for larger and three-phase homes. Both use the same modular LFP battery blocks and the same AI energy management, so the core difference is the controller and output.

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Related reading: the full Sigenergy SigenStor review, the Sigenergy price list, the Sigenergy backup gateway explained, and free quotes from vetted installers.