A 3 phase hybrid inverter lets you run solar, battery storage, and grid power across all three phases of your home.
If your home has a 3 phase power supply and you want to add batteries to your solar system, you need a hybrid inverter designed for three phases. A standard single-phase hybrid will not distribute power evenly across your switchboard.
This guide covers what a 3 phase hybrid inverter does, how it differs from a standard inverter, and what to look for when choosing one. SolaXs installs 3 phase hybrid systems with battery storage across the Mid North Coast.
Want to talk through your options? Contact SolaXs for a free consultation, or browse the solar packages available for 3 phase homes.
What Is a 3 Phase Hybrid Inverter
A 3 phase hybrid inverter converts DC power from solar panels into AC power and distributes it across all three phases of your electrical supply. The “hybrid” part means it also manages a connected battery, charging from solar during the day and discharging at night.
A standard solar inverter sends excess power to the grid and you buy it back later. A hybrid stores excess solar in your battery first, reducing what you buy from the grid after dark.
A 3 phase hybrid inverter handles:
- Solar conversion from DC panels to AC household power
- Battery charging and discharging based on your usage patterns and time-of-use tariffs
- Grid export when the battery is full and the house is not using power
- Grid import when the battery is empty and solar is not producing
- Load balancing across all three phases so no single phase is overloaded
- Backup power during blackouts (on models with backup capability)
Homes with 3 phase power typically have higher electricity consumption. Ducted air conditioning, pool pumps, EV chargers, and induction cooktops all draw from the 3 phase supply, making a hybrid inverter a natural fit.
3 Phase Hybrid vs Standard Solar Inverter
A standard solar inverter only converts solar DC to AC. It has no battery port and no ability to store energy for later use.
A hybrid inverter adds a battery connection, battery management system, and in most models, blackout protection. Choosing hybrid from the start avoids the cost of retrofitting a separate battery inverter later.
| Feature | Standard 3 Phase Inverter | 3 Phase Hybrid Inverter |
|---|---|---|
| Solar conversion | Yes | Yes |
| Battery connection | No (needs separate battery inverter) | Built-in DC battery port |
| Blackout backup | No | Yes (on most models) |
| Export limiting | Basic | Advanced, per-phase control |
| Future battery ready | Requires additional hardware | Ready from day one |
| Typical efficiency | 97 to 98% | 95 to 97% (slightly lower due to battery conversion) |
If you plan to add a battery in the next few years, installing a hybrid inverter now avoids the extra hardware, wiring, and labour costs of retrofitting later.
How to Size a 3 Phase Hybrid Inverter
The inverter size needs to match your solar panel capacity and your household consumption. Most residential 3 phase hybrid inverters come in 5 kW, 8 kW, 10 kW, and 15 kW models.
Under AS/NZS 4777.2 (the standard that governs inverter installations in Australia), you can connect a solar array up to 133% of the inverter’s rated capacity. A 10 kW inverter can support up to 13.3 kW of panels.
To work out the right size for your home, consider:
- Daily electricity usage from your last 12 months of bills
- Roof space and how many panels you can fit
- Battery size you plan to install now or later
- EV charging, if you have or plan to buy an electric vehicle
- Export limits set by your distributor
If you are unsure where to start, SolaXs can help you work out the right solar system size based on your bills and household loads.
On the Mid North Coast, Essential Energy allows up to 5 kW export per phase (15 kW total) for 3 phase connections. SolaXs handles the connection application and ensures your system meets all distributor requirements.
Battery Compatibility With 3 Phase Hybrid Inverters
Not every battery works with every hybrid inverter. Most 3 phase hybrids are designed for specific battery brands and chemistries.
The two main connection types are DC-coupled (battery connects to the inverter’s DC bus, more efficient) and AC-coupled (battery has its own inverter, more flexible placement). Most 3 phase hybrids use DC-coupled connections.
Key battery compatibility factors:
- Voltage range that the inverter’s battery port supports
- Maximum charge and discharge rate
- Number of battery units the inverter can manage (expandability)
- Whether the battery brand is on the inverter manufacturer’s approved list
Pairing the inverter and battery from the same brand is the simplest path. Mixed brands can work, but they add configuration complexity and sometimes void parts of the warranty.
Best 3 Phase Hybrid Inverter Brands in Australia
Several brands offer 3 phase hybrid models approved for the Australian market. Here is how the most popular options compare.
| Brand | Sizes | Full 3 Phase Backup | Compatible Batteries | Warranty |
|---|---|---|---|---|
| GoodWe ET | 5 to 30 kW | Yes (under 10 ms switchover) | GoodWe Lynx, BYD | 10 yr (ext. to 15) |
| Sungrow SH-RT | 5 to 10 kW | Yes | Sungrow SBR (stackable from 9.6 kWh) | 10 yr (ext. to 15) |
| Fronius Gen24 Plus | 6 to 10 kW | Yes (3.7 kW surge per phase) | BYD HVS/HVM | 10 yr |
| Sigenergy SigenStor | 5 to 25 kW | Yes (seamless) | Built-in modules (up to 38.4 kWh) | 15 yr |
SolaXs can walk you through a detailed comparison based on your system size and battery plans.
Blackout Protection on 3 Phase Hybrid Systems
Backup power during blackouts is one of the main reasons homeowners choose a hybrid inverter. Not all models offer the same level of backup, and 3 phase backup is more complex than single phase.
Backup capability varies by model and falls into three broad categories:
- No backup (some entry-level hybrids have no backup function at all)
- Single-phase backup where only one of the three phases stays powered during an outage, covering essentials like lights and the fridge
- Full 3 phase backup where all three phases stay live and the solar panels keep charging the battery during the outage
Full 3 phase backup keeps every circuit running and allows solar to continue generating while the grid is down. The GoodWe ET, Sungrow SH-RT, and Fronius Gen24 Plus all offer this with switchover times under 20 milliseconds.
If blackout protection matters to you, ask your installer about full 3 phase backup specifically. The Mid North Coast experiences storm-related outages, and having all circuits covered makes a real difference.
How Much Does a 3 Phase Hybrid Inverter Cost
A 3 phase hybrid inverter costs more than a standard string inverter because of the battery management hardware and backup circuitry. Pricing varies by brand and capacity.
As a rough guide for the Australian market:
- 5 kW 3 phase hybrid inverter: $2,500 to $3,500
- 8 to 10 kW 3 phase hybrid inverter: $3,500 to $5,500
- 15 kW+ 3 phase hybrid inverter: $5,500 to $8,000+
These are indicative inverter-only prices that vary by brand, region, and installer. Total installed cost including panels, battery, and labour will be higher. See the full breakdown of solar installation costs for details.
The federal solar battery rebate can reduce the upfront cost of the battery component. Eligibility depends on your system size and whether the battery is on the CEC Approved Battery list. SolaXs can confirm what rebates apply to your setup.
What a 3 Phase Hybrid Inverter Installation Involves
Installing a 3 phase hybrid inverter is more involved than a single-phase system. The electrician needs to wire the inverter to all three phases at the switchboard and configure per-phase export limits.
If you are adding a solar battery at the same time, the battery mounts within cable distance of the inverter. A backup changeover switch is installed if you want blackout protection.
A typical installation includes:
- Mounting the inverter on an external wall or in a garage
- Running DC cabling from the solar panels to the inverter
- Connecting the inverter to all three phases at the main switchboard
- Installing or configuring the meter for solar export
- Commissioning the inverter and monitoring app
- Submitting the connection application to your local distributor
The whole process takes one to two days depending on whether batteries and backup switches are included. CEC-accredited installers like SolaXs handle the connection paperwork and ensure the system passes inspection.
Get the Right 3 Phase Hybrid Inverter for Your Home
SolaXs has over 25 years of experience installing solar systems on the Mid North Coast. The team can assess your 3 phase supply, recommend the right inverter, and handle the installation from design to connection approval.
Contact SolaXs for a free consultation. Bring a recent electricity bill and any questions about battery storage, backup power, or charging your EV with solar.
SolaXs is CEC-accredited and installs all major inverter and battery brands. View solar packages.
Frequently Asked Questions
Do I need a 3 phase hybrid inverter if I have 3 phase power?
Not necessarily. A standard 3 phase string inverter works fine for solar-only systems. A hybrid makes sense if you want battery storage now or in the future.
Can I use a single-phase hybrid inverter on a 3 phase home?
You can, but it only feeds solar and battery power to one phase. A 3 phase hybrid distributes power across all three phases, giving better self-consumption and avoiding phase imbalance.
What size battery do I need with a 3 phase hybrid inverter?
It depends on your overnight consumption. A battery covering 50% to 70% of your overnight usage is a practical starting point. Your installer can model the right size based on your bills, or see how much solar batteries cost for pricing guidance.
Will a 3 phase hybrid inverter power my whole house during a blackout?
Only if the inverter supports full 3 phase backup and the battery has enough capacity. Entry-level models may only back up a single phase. Premium models from GoodWe, Sungrow, and Fronius offer full 3 phase backup.
Is a 3 phase hybrid inverter worth the extra cost over a standard inverter?
If you plan to add a battery within the next five years, yes. It saves the cost of a separate battery inverter later and gives you backup power, better export control, and time-of-use optimisation.
How long does a 3 phase hybrid inverter last?
Most come with a 10 to 15 year warranty and are designed to last 15 to 20 years. The inverter is usually the first component replaced in a solar system, well before the panels reach end of life.
Does the federal battery rebate apply to 3 phase hybrid systems?
Yes. The federal battery rebate applies regardless of whether your inverter is single-phase or 3 phase. The battery must be on the CEC Approved Battery list and installed by a CEC-accredited installer.