Solar battery guide: How to buy the best system for your needs

As a general guide, many Australian homes find a 10kWh to 13.5kWh battery to be a good starting point, with larger capacities available for higher consumption or off-grid aspirations. Most modern lithium batteries are designed to last around ten years or more, depending on usage patterns and maintenance. Its straightforward design and dependable performance make it ideal for homeowners wanting a reliable, low-maintenance system without unnecessary complexity. This makes SAJ particularly appealing for households that want detailed control over electricity usage or plan to integrate smart appliances and future energy technologies. Most modern electricity ‘smart’ meters log your electricity consumption every 15 minutes and you can obtain this data for up to the last 2 years from your local electricity network operator. Do not confuse this with your electricity retailer who sends you your bills.
The next step-down on 1 January 2027 cuts it again, to about $217/kWh on the first 14 kWh. On a 10 kWh battery that alone adds about $418 to the price you pay, with hardware costs unchanged. First, China commercial solar battery solution sumner cut the export VAT rebate its manufacturers receive on batteries from 9% to 6% in April 2026. That added roughly 3% to imported component costs and flowed through to installed prices within a month or two. The rest is scheduled to go in January 2027, adding about another 6% at the point of import. Electricians' labour rates vary by state, and installer competition affects margins.

For lithium batteries, this will usually be about 60–80% of the original capacity. When solar panels first became popular, the decision was relatively simple. Panels went on the roof, they made power, and apart from the occasional inverter replacement, they just worked.
These prices include the  federal battery rebate, which cuts the cost of installed batteries. To find out by how much, check out our federal battery rebate guide. Using the spare battery capacity to sell back into the grid can earn hundreds to thousands of dollars per year. However, now that the federal battery rebate no longer encourages oversized batteries, the number of people with enough spare energy for trading will likely plateau. The strongest all-round choices are the Sigenergy SigenStor for its integrated design and expandability, the Tesla Powerwall 3 for whole-home backup, and the Sungrow SBH for dependable local support. For value after the federal rebate, the Fox ESS, GoodWe ESA and Neovolt ranges lead the field.
Important characteristics include total BMS safety and a variety of capacity options. Our local team will help you choose a system that’s just right—no guesswork, no pressure. The benefit is a slight dip in efficiency because the power has to convert from DC to AC and back to DC. If you want to run an electric oven (3kW) and an air conditioner (4kW) at the same time, you need a battery with an output of at least 7kW. Power Output measured in kW is the speed at which the battery can deliver energy.

Our guide to the pros and cons of solar batteries makes the honest case both ways. If you want the whole house running through an outage, the Powerwall 3 and SigenStor lead on output capacity. If backup is a nice-to-have and lower bills are the real goal, the value brands do that job for far less money.
For example, the Tesla App’s ‘Charge-On-Solar’ feature broke about three months ago and refuses to charge my car from my 20kW of solar. I’ve now given up on it and pay $7 per month to ChargeHQ for solar charging instead. I’ve had my Powerwall 2 since 2016, and I installed a Sungrow battery on my rental property in 2023.

But for most households, we recommend over 16 kWh because – so long as you have enough solar – it will minimise your grid electricity consumption and allow you to live through most blackouts with ease. The size of home batteries depends on their energy capacity and their ‘specific energy’, which measures how much capacity they can squeeze into a given volume. If space is an issue, Tesla and Sungrow make space-efficient batteries, whereas the Enphase solution is bloody huge. Three free hour electricity plans, which can boost battery payback, and allow you to charge from the grid for free on low solar days, are currently only available in NSW, Vic, SA and SE Qld. Use our electricity tariff comparison tool to find a plan that works for you.
Tesla Powerwall will help you make the most of having solar, giving you the ability to store clean energy and use it when the grid is down or the sun isn’t shining. Before reporting a review please read through our reporting guidelines to see how we evaluate and moderate reported reviews. If you are a solar installer please read our legal threats policy. The 10 kW inverter can charge and discharge a compatible battery twice as fast for an extra $1,300 and also supports a larger solar system. But another specification that affects price is the battery inverter’s power.
You can even estimate your potential savings with our Battery Payback Calculator. Tindo Solar offers a great selection of solar batteries from trusted brands such as Tesla, Goodwe, Sungrow, SolarEdge and Enphase. If you want complete independence from fossil fuels and the unreliable national grid, speak to our team today.

Sungrow’s modular SBR HV battery system stands out for its affordability and comparable performance to pricier alternatives, providing a compelling choice for budget-conscious consumers. Rising to Silver from last year’s Bronze, many installers believe Tesla’s Powerwall 2 is the only game in town, even if you’re on a budget. Over the course of this project, the Battery Test Centre provided a very valuable amount of data and insight regarding the performance of a wide range of storage batteries. The trial has also demonstrated how difficult it is to devise a single test regime that covers several different battery chemistries and specifications, as they each have different performance limitations. It’s likely that the test regime worked better for lithium-ion batteries than for lead-acid, for example. The battery trial encountered a number of technical challenges, including several batteries developing faults and having to be removed or replaced.
Not only do we power hybrid and electric vehicles and homes, but our battery technology also meets the stringent standards required to reliably power NASA spacesuits. We’re bringing our reliable and efficient technology to Australian families to power their homes. If you are after a premium product and have the money, go get a Sonnen or Tesla Powerwall. For a good balance of panel features and cost go an Alpha ESS Solar Battery.

The cost of a solar panel and battery system in Australia typically ranges from $10,000 to $25,000+, depending on the system size, battery capacity, and installation requirements. Most residential systems fall between $15,000 and $20,00, but prices can vary based on your energy needs and available rebates. Sungrow Power Supply Co. was founded by Cao Renxian, a professor at Hefei University of Technology, driven by a vision to enhance electricity access in rural western China through renewable energy sources. This commitment to advancing renewable energy access laid the cornerstone for one of the most successful solar inverter companies globally. Most notably, Sungrow inverters and batteries have proven themselves as some of the best performing and most reliable systems available.