Buying guide

Best Home Batteries in Australia

There is no single "best" home battery for every Australian household. The right battery depends on how much evening and overnight electricity you use, whether you need blackout backup, whether you want to start with a smaller capacity and expand later, and how the battery integrates with your existing or planned solar system.

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This guide explains how to evaluate home batteries based on the specifications that matter, compares the major brands available in Australia, and helps you match a battery to your situation. We include brands we install and brands we do not, because our goal is to help you make an informed decision.

The federal Cheaper Home Batteries Program currently provides around a 30% discount on eligible battery systems, applied at the point of sale.

Source: Australian Government DCCEEW

View All Rebates and Incentives

How to Choose the Right Home Battery

The six specifications that matter most for Australian residential batteries are: usable capacity, cycle life, round-trip efficiency, continuous and peak power output, depth of discharge, and backup capability. The sections below explain each one.

What the Specifications Mean

Usable Capacity

Usable capacity is the amount of energy (in kWh) you can actually draw from the battery. This is different from the nominal capacity, which is the total theoretical energy the battery contains. The difference exists because every battery retains a small reserve to protect cell health and extend lifespan.

When comparing batteries, always compare usable capacity. The federal battery rebate is also calculated on usable capacity, not nominal. A battery marketed as "15kWh" with 13.5kWh usable stores less accessible energy than a battery marketed as "14kWh" with 13.8kWh usable.

Cycle Life

Cycle life is the number of full charge and discharge cycles the battery is warranted to perform before its capacity drops below a guaranteed minimum (usually 60 to 80 per cent of original capacity).

Most residential LFP batteries are warranted for 6,000 to 10,000 cycles. At one cycle per day (typical for a home battery), that translates to roughly 16 to 27 years. In practice, most homeowners will reach the end of the calendar warranty (10 to 15 years) before exhausting the cycle life.

Round-Trip Efficiency

Round-trip efficiency measures how much of the energy you put into the battery you actually get back out. If you store 10kWh and retrieve 9.5kWh, the round-trip efficiency is 95 per cent. The remaining 0.5kWh is lost as heat during the charging and discharging process.

Most modern LFP batteries achieve 90 to 97 per cent round-trip efficiency. The difference between 90% and 97% is modest in daily savings terms, but compounds over 10 to 15 years. Higher efficiency means less wasted energy.

Continuous and Peak Power Output

Continuous power output (in kW) is the maximum sustained power the battery can deliver at any moment. This determines how many appliances you can run simultaneously from the battery. A 5kW continuous output battery can run a split-system air conditioner, lighting, a fridge, and several smaller appliances at the same time.

Peak power (sometimes called surge power) is the maximum output the battery can deliver for a short burst, typically a few seconds. This handles the startup surge from appliances like air conditioners, pool pumps, or washing machines.

If you want the battery to run high-draw appliances, check the continuous output rating carefully. A battery with only 3kW continuous will struggle to run an air conditioner and other loads simultaneously.

Depth of Discharge

Depth of discharge (DoD) is the percentage of the battery's total capacity that can be used before it needs recharging. A battery with 100% DoD means you can use all of its usable capacity. Most modern LFP batteries have a DoD of 90 to 100 per cent.

Older battery chemistries (particularly lead-acid and some early lithium NMC) had lower DoD, meaning you could only use 50 to 80 per cent of the rated capacity. This is less of a concern with current LFP batteries, but worth checking if you encounter an older model.

Backup Capability

Backup capability means the battery can continue to power your home (or selected circuits) during a grid outage. Not every battery installation includes backup. It requires a compatible hybrid inverter, a backup switchboard or changeover mechanism, and specific wiring during installation.

Backup configurations vary. Some systems are wired to support a broad set of circuits, while others protect only selected essential circuits (lights, fridge, modem, selected power points).

Backup scope is not a property of the battery alone. It depends on the inverter's continuous output rating, how the switchboard is configured, and how much the household draws simultaneously. A larger battery extends backup duration; a higher-output inverter and appropriate switchboard wiring determine how much can run at once. Discuss your specific requirements with your installer before assuming any particular scope.

If backup is important to you, specify this before installation. It affects the inverter choice, the wiring configuration, and potentially the battery size.

Home Battery Brands Available in Australia

Usable capacity, drawn to scale in kilowatt hours. Listed alphabetically, not ranked.

Sungrow

9.6–25.6kWh

Sigenergy

5–30kWh+

FoxESS

5.2–20.8kWh

Growatt

5.12–25.6kWh

Tesla Powerwall 3

13.5kWh · single unit

BYD

5.12–22.1kWh

Enphase IQ Battery

5kWh per unit

sonnen

5.5–22kWh

Alpha ESS

5.7–34.2kWh

GoodWe

5.4–21.6kWh

Stocked by SunRight Solar Available in Australia One fixed size, not expandable in place

Illustrative line-up of home battery units from ten brands available in Australia, in alphabetical order: Alpha ESS, BYD, Enphase, FoxESS, GoodWe, Growatt, Sigenergy, sonnen, Sungrow and Tesla

Sungrow

Stocked by SunRight Solar

Sungrow is one of the most widely installed residential battery brands in Australia. The SBR series uses a modular, stackable design where individual 3.2kWh battery modules can be added or removed. This allows homeowners to start with a smaller capacity and expand over time. Sungrow batteries pair seamlessly with Sungrow hybrid inverters for a fully integrated system.

Best suited to: homeowners who want a modular, expandable battery from a major manufacturer with strong Australian support.

Chemistry: LFP
Usable capacity range: 9.6kWh to 25.6kWh (modular, stackable in 3.2kWh increments)
Cycle life: 6,000 cycles to 80% retained capacity
Round-trip efficiency: 96.5%
Continuous output: 5kW (single battery tower)
Backup: yes, with Sungrow hybrid inverter
Modularity: yes, stackable SBR modules

Sigenergy

Stocked by SunRight Solar

Sigenergy is a premium, modular battery and energy platform. The system integrates the battery, hybrid inverter, and optional EV charger into a single platform. Expansion modules can be added as energy needs grow. Sigenergy's monitoring platform provides detailed energy management with consumption tracking and optimisation.

Best suited to: homeowners seeking a premium, integrated energy platform with EV charging capability and long-term expansion potential.

Chemistry: LFP
Usable capacity range: 5kWh to 30kWh+ (modular)
Cycle life: 8,000 cycles
Round-trip efficiency: 95%+
Continuous output: varies by configuration
Backup: yes, integrated
Modularity: yes, expansion modules
Additional: integrated hybrid inverter and optional EV charger

FoxESS

Stocked by SunRight Solar

FoxESS batteries offer strong value with LFP chemistry, good cycle life warranties, and compatibility with a range of hybrid inverters. The modular design allows capacity expansion. FoxESS has a growing presence in the Australian market with local warranty support.

Best suited to: homeowners seeking reliable storage at a competitive price point with expansion capability.

Chemistry: LFP
Usable capacity range: 5.2kWh to 20.8kWh (modular)
Cycle life: 6,000 cycles to 80% retained capacity
Round-trip efficiency: 95%
Continuous output: varies by model
Backup: yes, with compatible hybrid inverter
Modularity: yes, stackable modules

Growatt

Stocked by SunRight Solar

Growatt's battery range pairs with their hybrid inverters for an integrated system. Modular stacking is available across most models, and the system is competitively priced. Growatt has expanded its Australian support infrastructure in recent years.

Best suited to: budget-conscious homeowners who want an integrated solar-plus-battery system with expansion flexibility.

Chemistry: LFP
Usable capacity range: 5.12kWh to 25.6kWh (modular)
Cycle life: 6,000 cycles
Round-trip efficiency: 95%
Continuous output: 5kW
Backup: yes, with Growatt hybrid inverter
Modularity: yes, stackable

Tesla Powerwall 3

The Tesla Powerwall 3 is a fully integrated battery and solar inverter unit. It includes a built-in inverter that manages both solar panels and battery storage, which simplifies installation. The 11.5kW continuous output is the highest in the residential market, which means it can support a broader backup configuration and higher simultaneous loads than most alternatives, subject to switchboard configuration.

The main trade-off is flexibility. The Powerwall 3 is a closed ecosystem: it works with Tesla's own inverter and monitoring platform (Tesla app). It is not compatible with third-party inverters or batteries. If you want to mix brands or use a specific inverter, the Powerwall is not an option.

Tesla's availability through independent installers in Australia has also been inconsistent, with some regions experiencing long wait times.

Best suited to: homeowners who want a high-powered, integrated system with strong backup capability and are comfortable within Tesla's ecosystem.

Chemistry: LFP
Usable capacity: 13.5kWh (single unit, non-modular)
Cycle life: not publicly specified in cycle count (10-year warranty)
Round-trip efficiency: 97.5% (integrated inverter)
Continuous output: 11.5kW (integrated solar and battery inverter)
Backup: yes, high continuous output supports broader backup configurations
Modularity: units can be stacked (up to 4), but each unit is 13.5kWh

BYD

BYD is one of the world's largest battery manufacturers (also a major EV manufacturer). The HVM and HVS series are modular, stackable, and compatible with a wide range of third-party hybrid inverters including Fronius, GoodWe, and SMA. This flexibility makes BYD a popular choice for installers who want to pair a reliable battery with their preferred inverter brand.

Best suited to: homeowners whose installer recommends a specific inverter brand and needs a compatible, modular battery with proven reliability.

Chemistry: LFP
Usable capacity range: 5.12kWh to 22.1kWh (HVM/HVS modular series)
Cycle life: 8,000 cycles
Round-trip efficiency: 95.3%
Continuous output: depends on paired inverter
Backup: depends on inverter configuration
Modularity: yes, stackable modules

Enphase IQ Battery

The Enphase IQ Battery is designed to work within the Enphase microinverter ecosystem. If your solar panels are already on Enphase microinverters, the IQ Battery integrates natively with the same monitoring platform (Enlighten) and uses AC-coupling by default.

The lower cycle life compared to other LFP batteries (4,000 vs 6,000+) and the 5kWh per-unit capacity mean that larger storage requirements need multiple units, increasing cost.

Best suited to: homeowners already using Enphase microinverters who want a fully integrated Enphase system.

Chemistry: LFP
Usable capacity: 5kWh per unit (stackable up to 80kWh)
Cycle life: 4,000 cycles to 80% retained capacity
Round-trip efficiency: 96%
Continuous output: 3.84kW per unit
Backup: yes, with Enphase system controller
Modularity: yes, multiple units stackable

sonnen

sonnen is a German-manufactured premium battery with one of the highest cycle life ratings in the residential market (10,000 cycles). The sonnenBatterie is a fully integrated system with its own inverter, monitoring, and VPP capability. sonnen operates its own VPP in Australia (sonnenFlat), which offers energy credits in exchange for battery participation.

The trade-off is lower round-trip efficiency (91.3%) compared to competitors, and premium pricing.

Best suited to: homeowners prioritising maximum cycle life and interested in sonnen's VPP programme.

Chemistry: LFP
Usable capacity range: 5.5kWh to 22kWh (sonnenBatterie series)
Cycle life: 10,000 cycles
Round-trip efficiency: 91.3%
Continuous output: 3.3 to 8.3kW depending on model
Backup: yes, built-in
Modularity: expandable within model range

Alpha ESS

Alpha ESS is a Chinese-Australian company with manufacturing and R&D in both countries. The SMILE series offers competitive pricing with modular expansion. Alpha ESS has established Australian warranty support and a cloud-based monitoring platform.

Best suited to: homeowners seeking a modular, competitively priced battery with local manufacturing connection.

Chemistry: LFP
Usable capacity range: 5.7kWh to 34.2kWh (SMILE series, modular)
Cycle life: 6,000 to 10,000 cycles depending on model
Round-trip efficiency: 95%
Continuous output: 5kW
Backup: yes, with hybrid inverter
Modularity: yes, stackable

GoodWe

GoodWe's Lynx battery series pairs with GoodWe hybrid inverters for a mid-range integrated system. The modular design allows capacity expansion, and GoodWe has a growing Australian support presence.

Best suited to: homeowners using GoodWe inverters who want an integrated, expandable battery at a competitive price point.

Chemistry: LFP
Usable capacity range: 5.4kWh to 21.6kWh (Lynx series, modular)
Cycle life: 6,000 cycles
Round-trip efficiency: 95%
Continuous output: varies by paired inverter
Backup: yes, with GoodWe hybrid inverter
Modularity: yes, stackable

Which Battery Suits Your Home?

Best for Starting Small and Expanding Later

If you want to install a smaller battery now and add capacity as prices fall or your needs grow, choose a modular, stackable system. Sungrow SBR, FoxESS, Growatt, BYD, and Alpha ESS all offer genuine modularity where individual battery modules can be added to an existing installation.

Best for Extended Backup Coverage

If backup during grid outages is a top priority and you want more than a few essential circuits protected, continuous output is the specification that matters most. The Tesla Powerwall 3 offers the highest continuous output (11.5kW) in the residential market. For non-Tesla systems, pairing a larger capacity modular battery (20kWh+) with a high-output hybrid inverter achieves comparable results with more brand flexibility.

How much of your home can actually be backed up also depends on your switchboard configuration and your simultaneous load demand, so confirm the achievable scope with your installer rather than assuming it from the battery specification.

Best for Budget-Conscious Homeowners

Growatt, FoxESS, and Alpha ESS offer reliable LFP storage at lower price points than premium brands. All three provide modular expansion, so you can start smaller and add capacity over time. The federal battery rebate (~30% discount) applies to all eligible systems regardless of brand.

Best for EV Readiness and Smart Integration

Sigenergy stands out with its integrated platform that combines battery storage, hybrid inverter, and optional EV charger in a single system. If you plan to add an EV charger and want everything managed through one platform, Sigenergy is purpose-built for this scenario.

Best for Long-Term Durability

sonnen (10,000 cycles) and BYD (8,000 cycles) lead on cycle life warranties. If your priority is a battery that retains the most capacity over the longest period, these brands offer the strongest durability guarantees.

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What SunRight Solar Installs and Why

We do not currently stock Tesla Powerwall, BYD, Enphase IQ Battery, sonnen, Alpha ESS, or GoodWe batteries. This is not because these are poor products. Each has genuine strengths as described in this guide. Our selection is based on the combination of quality, value, inverter compatibility, and local support that works best for the majority of our customers.

We include all major brands in this guide because an informed buyer makes a better customer. If you are comparing quotes from multiple installers, this guide should help you evaluate the battery each one offers.

Once you have a brand in mind, the next decision is capacity. Our capacity guides cover SunRight Solar's full battery range:

5kWh battery Entry-level, for apartments and small households 10kWh battery The standard family capacity 14kWh battery The sweet spot for most Australian households 20kWh battery For higher-consumption and all-electric homes 28kWh battery For large families and multiple EVs 42kWh battery SunRight Solar's maximum residential capacity

View Battery Storage Options See Battery Prices by Capacity Get a Personalised Quote

Does my battery brand need to match my inverter brand?

Not always, but compatibility matters. Some batteries are designed to work with a specific inverter brand (e.g., Sungrow batteries with Sungrow inverters, Tesla Powerwall with its integrated inverter). Others, like BYD, are compatible with multiple inverter brands. Your installer should verify compatibility during system design. Mismatched combinations can result in limited functionality or warranty issues.

Compare Inverter Types

Is the Tesla Powerwall still the best battery in Australia?

The Powerwall 3 remains a strong product with the highest continuous output in the residential market. However, Tesla's market share in Australia has declined as modular LFP alternatives from Sungrow, BYD, and others have become available at competitive prices with greater flexibility. The "best" battery depends on your priorities: if you want high continuous output for broader backup coverage and are happy within Tesla's ecosystem, the Powerwall is a solid choice. If you want modularity, inverter flexibility, or a lower entry cost, other options may suit better.

What does cycle life actually mean in real years?

At one full cycle per day, a 6,000-cycle battery lasts approximately 16 years in cycle terms. A 10,000-cycle battery lasts approximately 27 years. Most homeowners will reach the end of the calendar warranty (10 to 15 years) before exhausting the cycle life, so the calendar warranty is usually the binding constraint.

Can I add a different brand of battery to my existing system?

Generally, no. Battery expansion works by adding modules of the same brand and series to an existing installation. You cannot stack a Sungrow module onto a BYD battery. If you want a different brand, you would typically install a separate, new battery system alongside the existing one (if your inverter and switchboard support it), or replace the existing battery entirely.

How does the federal battery rebate affect which brand I choose?

The rebate applies equally to all eligible battery brands. It is based on the usable capacity of the battery, not the brand. Choose your battery based on performance, compatibility, and your household's needs, not on the rebate amount.

Source: DCCEEW

What is round-trip efficiency and does it matter?

Round-trip efficiency measures how much of the energy stored in the battery you actually get back. At 95% efficiency, storing 10kWh returns 9.5kWh. The 5% is lost as heat. While the difference between 91% and 97% seems small, over 10 years of daily cycling it compounds to a meaningful amount of lost energy. Higher efficiency is better, but it is one factor among several and should not override other considerations like capacity, backup capability, or price.

Find the Right Battery for Your Home

The best battery depends on your solar system, your evening energy usage, your backup requirements, and your budget. Request a free, no-obligation quote and we will recommend a battery based on your actual energy data.

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A family and their dog looking at their solar-powered home and battery at sunset

Best Home Batteries in Australia

How to Choose the Right Home Battery

What the Specifications Mean

Usable Capacity

Cycle Life

Round-Trip Efficiency

Continuous and Peak Power Output

Depth of Discharge

Backup Capability

Home Battery Brands Available in Australia

Sungrow

Sigenergy

FoxESS

Growatt

Tesla Powerwall 3

BYD

Enphase IQ Battery

sonnen

Alpha ESS

GoodWe

Which Battery Suits Your Home?

Best for Starting Small and Expanding Later

Best for Extended Backup Coverage

Best for Budget-Conscious Homeowners

Best for EV Readiness and Smart Integration

Best for Long-Term Durability

What SunRight Solar Installs and Why

Frequently Asked Questions

Find the Right Battery for Your Home