Updated on March 9, 2026
If you’re exploring solar energy, you’ve likely heard about solar batteries. Many articles and salespeople recommend getting one, but with so many choices, it can be tough to know where to begin.
Which battery should you choose? Why? How do you even begin comparing them?
At PSC Energy, we understand that starting your solar journey can feel overwhelming. A quick online search often leads to more confusion than answers. Since your energy needs are unique, the best battery for your neighbour might not be the best for you.
A Quick Note on Our Bias:
We sell three batteries from this list: the Enphase IQ Battery 5P, the Sigenergy SigenStor, and the Tesla Powerwall 3. We trust their performance, but we also know they might not suit everyone.
This article looks at the six best solar batteries available in 2026. You’ll find a clear breakdown of each battery’s features, benefits, and drawbacks:
We don’t install every brand listed here, but we believe educating solar buyers is essential to creating a cleaner future.
How to Use This Guide
The six batteries are listed alphabetically. Each entry includes links to the company’s website and product details to help with your research.
Here’s what we cover for each battery:
Overview: A brief introduction to the company and the battery.
Weight: The battery’s weight in kg.
Round-Trip Efficiency: A measure of how much energy is lost during charging and discharging. A battery rated at 90% efficiency loses 10% of its power in the process.
Operating Temperature: The range of temperatures the battery can handle. This is important in Australia, where extreme heat can impact performance, especially if the battery is installed outdoors.
Warranty: The warranty length and any important conditions.
Compatibility: Whether the battery is AC-coupled or DC-coupled. More on what that means below.
Energy Storage: How much energy the battery stores, measured in kilowatt hours (kWh).
Power Output: How much power the battery delivers, measured in kilowatts (kW).
Pricing: The prices shown cover equipment only, based on company websites. Installation and extra equipment can add to the total cost.
Who Is This Battery a Good Fit For? A short summary to help you decide whether to research further or move on to another product.
AC-Coupled vs DC-Coupled: What’s the difference?
Before we get into the battery specs, it helps to understand how batteries connect to your solar system.
- Solar panels produce DC power.
- Your home and the electrical grid run on AC power.
- Batteries can only store DC energy.
So, the electricity must be converted more than once along the way.
In an AC-coupled system, the solar panels generate DC power. An inverter on the side of the house or microinverter beneath each panel converts it to AC power for your home and the grid. When the battery needs to store that energy, it gets converted back to DC. And there’s another conversion from DC back to AC when the home needs that energy.
In a DC-coupled system, the DC power from your panels goes straight to a hybrid inverter on your house. If the energy is for your home, the inverter changes it to AC. If it’s going to the battery, it stays as DC.
In some of the newer energy systems, the DC power completely bypasses the inverter and stores directly into the battery. This skips a conversion steps, so less energy is lost and efficiency improves.
Energy vs Power: A Quick Clarification
Some solar writers use the terms “energy” and “power” interchangeably. They’re not the same thing.
Power is electricity in motion, like electricity flowing through a cable from your panels to your home.
Energy is electricity stored for later use, like what sits in your battery overnight.
A simple way to think about it: power flows like water through a hose, while energy is stored like water in a bucket.
If you’re interested in solar batteries, you might want to check out the following article titled, Are Solar Batteries Worth It in NSW? PSC’s Ultimate Guide for 2026.
Alpha ESS
Alpha ESS has been operating since 2012. It’s a Chinese company with offices in Australia, the UK, Germany, and Italy. Their Australian product line is the SMILE series, with the SMILE5 being their best-seller.
SMILE stands for: Self-sufficient, Modular, Intelligent, Long lifespan, and Elegant.
The SMILE5 is a lithium iron phosphate (LFP) battery, one of the safest battery types on the market. It comes in four sizes, ranging from 2.9 kWh to 13.3 kWh. The specs below are for the 10.1 kWh model, one of the most popular choices in Australia.
Alpha ESS SMILE5 Specs
Weight: 122.7 kg
Round-Trip Efficiency: 92.72%
Operating Temperature: –10°C to 50°C
Warranty: 5-year product warranty, 10-year battery performance warranty.
Note: The battery needs to stay connected to the internet so Alpha ESS can monitor its performance. If it’s offline for more than 48 hours without notice, the warranty shortens to 3 years.
Compatibility: AC-coupled or DC-coupled
Storage: 10.1 kWh
Power Output: 5 kW
Who Is the Alpha ESS SMILE5 a Good Fit For?
The SMILE5 is built for homeowners who already have a solar system installed. Its AC and DC compatibility means it can work with almost any existing setup.
It’s also one of the more affordable options here. However, a quick online search shows mixed reviews. Some customers appreciate the low price, while others have had issues with Alpha ESS customer service.
One more thing to be aware of: there are many SMILE5 models available in Australia, each with slightly different specs. Make sure you have the correct make and model number before purchasing.
If you’re interested in learning a bit more about the price of solar batteries, you might want to check out the following article titled, How Much Are Solar Batteries? A Full Breakdown of Prices, Rebates, and Value in 2026.
Enphase IQ Battery 5P
Enphase Energy is an American company best known for developing microinverters which are small inverters that mount beneath individual solar panels to convert DC power to AC.
The Enphase IQ Battery 5P goes further by including six microinverters built right inside the battery. These manage charging, discharging, and power conversion internally. If one microinverter fails, the battery still works at just over 80% efficiency.
Enphase IQ Battery 5P Specs
Weight: 66.3 kg
Round-Trip Efficiency: 90%
Operating Temperature: –15°C to 55°C
Warranty: 15 years or 6,000 cycles
Compatibility: AC-coupled
Storage: 5 kWh
Power Output: 3.84 kW
Who Is the Enphase IQ Battery 5P a Good Fit For?
This battery is best suited for homes with an existing Enphase solar system, or those planning to install one. It’s only compatible with Enphase equipment, so if you have a string inverter system, you’ll need to look at other options.
At 5 kWh, the storage is on the smaller side. You can stack multiple units together easily, and doubling to 10 kWh puts it at a comparable price to other batteries in the same class.
If you’re interested in learning a bit more about IQ Batteries, you might want to check out the following article titled, How Much Does an Enphase IQ Battery 5P Cost?
Sigenergy
The SigenStor is an all-in-one solar inverter and battery system. Solar panels send power straight into the battery bypassing the inverter which cuts down energy losses.
It can also connect to an optional bidirectional EV charger, letting you charge the battery from your electric vehicle or power your car from the battery.
The SigenStor combines five components into one unit:
- Hybrid Inverter: Converts DC power from solar panels into AC electricity for home use.
- Battery Storage: Stackable modules store excess energy for nighttime or peak demand use.
- Battery Power Conversion System (PCS): Converts stored DC power back to AC for your home.
- Energy Management System (EMS): AI-powered software that optimises when the battery charges and discharges to maximise savings.
- Optional EV DC Charger: Charges electric vehicles directly via DC, which is more efficient than standard AC charging.
Think of the components like building blocks that stack on top of each other, making the system modular and flexible.
Sigenergy SigenStor Specs
Weight: Varies by configuration
Round-Trip Efficiency: 98%
Operating Temperature: –20°C to 55°C
Warranty: 10 years
Compatibility: AC-coupled or DC-coupled
Storage: 8 kWh per block
Power Output: Varies depending on inverter type.
Who Is the Sigenergy SigenStor a Good Fit For?
What makes the SigenStor stand out is its AI integration. It uses ChatGPT-4o to learn your energy habits and can automatically manage your system. If you’re not comfortable with solar monitoring apps, this is a handy way to optimise your energy use.
It’s also one of the most customisable batteries on the list. If you’re looking for large storage capacity or want to future-proof your home with EV charging, the SigenStor is worth a close look.
If you’d like to learn a bit more about the cost of SigenStor, we recommend you check out the following article titled, How Much Does the Sigenergy SigenStor Cost?
SolarEdge
SolarEdge was founded in 2006 and built its reputation on DC optimiser technology used in central inverter solar systems. The company has offices worldwide, including Australia.
The SolarEdge Home Battery is designed for homeowners who already have a SolarEdge system installed.
SolarEdge Home Battery Specs
Weight: 121 kg
Round-Trip Efficiency: 94.5%
Operating Temperature: –10°C to 50°C
Warranty: 10 years
Compatibility: DC-coupled
Storage: 10 kWh
Power Output: 5 kW
Who Is the SolarEdge Home Battery a Good Fit For?
SolarEdge is one of the largest solar companies in Australia. Its hybrid inverter is widely regarded as the best option for string solar systems. Paired with a SolarEdge battery, the whole system is highly efficient.
You can stack up to three batteries, but you’ll also need a DC Combiner Box from SolarEdge. The price for this add-on isn’t listed on their website. If you’re adding a battery to an existing SolarEdge system, you might need to upgrade your inverter, which can increase costs.
This battery is only compatible with SolarEdge systems. If you’re planning a full SolarEdge installation from scratch, it’s a strong option. If you’re trying to add it to a different brand system, look elsewhere.
If you’re interested in learning more about sizing solar batteries, you might want to check out the following article titled, What Size Solar Battery Do You Need?
Sungrow
Sungrow has an interesting origin story. It was founded in 1997 by Professor Cao Renxian of Hefei University of Technology in China, with a mission to improve energy solutions in western China. Today, it’s a global solar brand known particularly for its hybrid inverters.
The Sungrow SBR HV is a high-voltage lithium iron phosphate (LFP) battery with a modular design. Each module stores 3.2 kWh. You can stack up to eight modules per unit (25.6 kWh) and link up to four units together for a maximum of 102.4 kWh of storage.
The specs below are for the 12.8 kWh four-module configuration, which is the closest comparison to the other batteries in this guide.
Sungrow SBR HV Specs
Weight: 147 kg
Round-Trip Efficiency: 93.3%
Operating Temperature: –30°C to 50°C
Warranty: 10 years
Compatibility: DC-coupled
Storage: 12.8 kWh
Power Output: 7.68 kW
Who Is the Sungrow SBR HV a Good Fit For?
Sungrow batteries only work with Sungrow hybrid inverters. If you already have a solar system and don’t want to add a Sungrow inverter, this battery won’t be a good fit.
If you are open to a Sungrow inverter, or already have one, the modular design makes this a great option for scaling storage over time. It’s particularly well-suited to homes with high energy needs or those expecting to expand their usage in the future.
If you’re interested in learning a bit more about expanding your energy system, you might want to check out the following article titled, Expanding Your Solar Panel System with Batteries and Add-Ons.
Tesla Powerwall 3
Tesla started in 2003 as an electric vehicle company and soon expanded into home energy storage. The first Powerwall came out in 2015, followed by the Powerwall 2 in 2016. The Powerwall 3 is the newest model.
The biggest benefit of the Powerwall 3 is its compatibility. It works with any solar system from any brand without restrictions.
The Powerwall 3 is a lithium-iron-phosphate battery with advanced safety features.
Tesla Powerwall 3 Specs
Weight: 130 kg
Round-Trip Efficiency: 96–97%
Operating Temperature: –20°C to 50°C
Warranty: 10 years
Compatibility: AC-coupled (requires a separate solar inverter) or DC-coupled with direct solar inputs
Storage: 13.5 kWh
Power Output: 11.04 kW (may be limited to 10 kW or 5 kW depending on your local DNSP rules)
Pricing: The Powerwall 3 costs $11,900. You’ll also need a Tesla Gateway 2 for $1,700, making the equipment total $13,600 before installation.
Who Is the Tesla Powerwall 3 a Good Fit For?
The Powerwall 3 is one of the most popular solar batteries in Australia. It’s compatible with any solar system, which removes a major barrier for many homeowners.
It can also be installed as a DC-coupled system with direct solar inputs, which boosts efficiency significantly. For homes with high energy usage, or for buyers who want a premium, brand-agnostic battery, the Powerwall 3 is a strong choice.
If you’d like to learn more about the price of a Powerwall 3, you might want to check out the following article titled, How Much Does a Tesla Powerwall 3 Cost?
Final Thoughts: Don’t Let Decision Fatigue Drain Your Battery
Every home is different. Choosing the right battery depends on your specific needs and situation. Before deciding, ask yourself:
- Is your solar system already installed, or are you starting fresh?
- How much storage do you need based on your daily energy usage?
- What is your budget for both the battery and installation?
At PSC Energy, we understand this can feel like a lot. When you’re ready to discuss your options, we’re here to help. It’s what we do.
If you’re interested in learning more about the Cheaper Home Batteries Program and it’s recent changes, you might want to check out the following article titled, Changes to the Australian Government’s Cheaper Home Batteries Program Explained.
FAQ: 6 Best Solar Batteries
What are the best solar batteries in Australia for 2026?
The top six are: Alpha ESS SMILE5, Enphase IQ Battery 5P, Sigenergy SigenStor, SolarEdge Home Battery, Sungrow SBR HV, and Tesla Powerwall 3. Each has different strengths depending on budget, storage needs, compatibility, and installation type.
How do I choose the right solar battery for my home?
Start by asking yourself: Do you already have solar installed, or are you starting fresh? What’s your average daily electricity use? Do you prefer AC or DC coupling? What’s your budget? The right battery fits your energy habits, system type, and financial goals.
What is the difference between AC-coupled and DC-coupled solar batteries?
AC-coupled batteries convert DC power to AC before storing it, which involves more conversion steps and slightly more energy loss. DC-coupled batteries store electricity without converting it first, which means fewer losses and higher efficiency. DC coupling works best for new systems; AC coupling is easier to retrofit.
Which battery is most compatible with all solar systems?
The Tesla Powerwall 3. It works with any brand of solar panels or inverter when AC-coupled.
What is the standard solar battery warranty in Australia?
Most batteries come with a 10-year warranty. The Enphase IQ Battery 5P offers up to 15 years or 6,000 cycles. Always check the fine print; some warranties have conditions around internet connectivity or cycle limits.
Which battery is best for buyers on a budget?
The Alpha ESS SMILE5. It’s affordable, flexible, and comes in multiple sizes. The trade-offs are a shorter default warranty and variable customer service.
Which battery works best with electric vehicle charging?
The Sigenergy SigenStor. It supports bidirectional DC charging, which lets you charge your car from solar power or feed energy from your car back into the home.
How much storage do I need in a home battery?
Most Australian homes use between 15 and 25 kWh of electricity per day. A 10 kWh battery covers typical overnight usage for many households. Larger families or EV owners may want 13–20 kWh. Modular batteries from Sungrow and Sigenergy let you scale up over time.
