Best Solar Battery Size for Homes?

Happy with the battery, only comment would be Sonnen were a bit slow at getting back to my installer with an issue we had. But like with the SolarEdge inverter, the battery is also setup as 3 phase, and its inverter failed after 2 years ... The sonnenBatterie Evo is also able to provide more power during an outage with output rated to 5,000 watts, while the hybrid 9.53 can supply a maximum of 3,300 watts. The battery is still a large single unit which makes for some logistical considerations during the installation process and will generally require more than one installer.
Based in Silicon Valley, FranklinWH aims to  enhance home energy resilience and efficiency through its advanced, all-in-one smart energy storage systems. Like the Powerwall 2, the Franklin system is an AC-coupled battery system, meaning it can seamlessly connect to almost any existing solar inverter or microinverter system. However, Franklin has integrated several smart load control and power management features to get an edge over federal government solar battery rebate the competition.

As of early 2025, approximately 185,800 home battery systems have been installed across Australia, marking a significant surge in adoption. In 2024 alone, around 75,000 units were added, reflecting a 47% increase from the previous year. Its solar batteries are known for their optimised power generation, smart home energy management system, simple plug-and-use interface, and high degree of safety.
When choosing your battery brand, it’s wise to choose one from a well-established brand – like Huawei. If a weather event or a power cut whips the electricity from your home, you need to be as prepared as you can. With the right battery storage for your solar system, you’ll be able to keep your home running until the power comes back.
Third, having a solar battery is a good way to practice environmental sustainability. It means you’re not relying on fossil fuels and coal-powered electricity, thus reducing carbon footprint. Solar panels typically generate most energy during peak daylight hours, when household demand for electricity is low. Instead of sending the excess energy back to the grid, solar batteries work by storing energy for later use.

The cost of solar batteries in Australia varies depending on a few factors including brand, capacity and features. The average cost of a 10kWh battery falls between $6,000 and $12,000, while a 20kWh battery can range from $12,000 to $20,000. These prices may seem high, but it's important to consider the long-term savings that come with using solar energy. Additionally, the cost of solar batteries is steadily decreasing as technology advances and more companies enter the market. It's important for consumers to research and compare different brands to find the best option for their budget and energy needs. With the increasing demand for renewable energy sources, it's likely that the cost of solar batteries will continue to decrease in the coming years.
The BYD Premium LVS can generate up to 256kWh when 16 battery stands are consolidated together parallel. The 9.8kWh battery has a 90 percent usage capacity and can be expanded to 19.6kWh. The power output of the Tesla Powerwall 2 is 5kW with continuous power and 7kW with peak power. There is a 10-year warranty for this solar battery with a 70 percent minimum retained capacity.
Sungrow offers a competitive warranty of 10 years, ensuring that your investment is protected for an extended period. Here are Australia’s 5 best solar batteries for Australia, which include the Sungrow, Eveready Battery, Energizer Battery, Tesla Powerwall, and BYD premium. Whether integrated into new systems or retrofitted into existing ones, it seamlessly adapts to both AC and DC-coupled configurations. Scalable up to an impressive 30kWh by connecting up to three units, it caters to a variety of energy storage needs. Its advanced cooling system, featuring a liquid thermal management system, enables it to operate seamlessly across diverse temperature ranges. This ensures optimal performance and reliability in various environmental conditions.

All these features sum up together to make SLA LIFE a reliable name in the solar world. An Energizer battery can store up to 5.5 kWh of energy that can be further scaled up to 27.82 kWh with a 90% DoD. The Enphase AC battery has a 10-year warranty that begins on the battery’s activation date.
It boasts over 6,000 charge cycles, backed by a 10-year warranty, ensuring peace of mind for years. Together, we evaluated a range of popular solar Battery brands and scored them out of 50. These scores reflect not just technical specs, but also our hands-on experience and what we’ve seen work best for Australian homes. For example, a 10kWh solar system installed in Sydney could generate over 100 STCs, reducing your upfront cost by more than $3,000, depending on market rates and the installer’s rebate offering.

This guide walks you through the key factors to consider - whether you're just starting your solar journey or looking to upgrade your setup. Being an Australian-owned and operated company, PowerPlus pride themselves on their locally made components and offer the same commitment to their local support for customers. Up to 4 Battery Units can be connected in parallel to achieve a maximum capacity of 100 kWh. Flooded Lead Acid Batteries are a lower initial cost proven performer in standalone applications that are properly sized and regularly maintained by experienced persons.
Choosing the right solar battery for your home is essential for maximising your  solar investment. With so many options on the market, however, it can be challenging to find a battery that meets your needs and fits within your budget. We aim to simplify your decision-making process by showcasing the top affordable options.