A decent-sized solar battery—say, around 10kWh—starts at about $7,000 for the hardware alone. Add installation, and you’re looking at something closer to $9,000 to $13,000 before rebates.

Here’s what we’re seeing for common models installed in Australian homes right now:

The AlphaESS Smile5 (13.3kWh usable) comes in around $11,000 installed, but after the new federal rebate, that drops to about $6,600.

The Sungrow SBR (12.8kWh usable) ends up around $7,000 post-rebate.

A high-end Tesla Powerwall 2 (13.5kWh usable) sets you back about $15,400 installed—but you’ll pay roughly $10,950 after rebates.

Keep in mind, these figures don’t include the cost of a hybrid inverter if your system doesn’t already have one, which could add another $1,500 to $3,000 depending on your setup.

The 2025 Federal Battery Rebate

The biggest game-changer this year is the new Federal Battery Rebate, part of the government’s push to reduce grid demand and accelerate clean energy adoption. Starting 1 July 2025, eligible batteries will get a rebate of around $330 per usable kilowatt-hour.

That means for a 13.5kWh Powerwall 2, you could knock off over $4,000 from the price straight away. The rebate is available nationwide, and even better, batteries installed before July 1 can still qualify—so long as they aren’t turned on until after the program starts.

You read that right. If you’ve already bought or are planning to install a battery in June, just don’t energise it until July and you’re good to go.

State-Based Rebates: More Savings for Some

On top of the federal rebate, several states are sweetening the deal:

New South Wales has its own rebate of up to $1,500, especially for those who connect their battery to a Virtual Power Plant (VPP).

Western Australia is introducing a new rebate starting 1 July 2025—exact figures are yet to be confirmed, but early talk suggests it’ll complement the federal incentive.

Northern Territory continues to offer generous rebates under its Home and Business Battery Scheme.

If you live in one of these states, the combined rebates could shave thousands more off your battery bill.

Installation Costs: What to Expect

Even with generous rebates, you can’t escape the cost of getting your battery properly installed. In Australia, you’re not allowed to DIY this—it must be done by a licensed professional.

For a straightforward install, expect to pay at least $2,000.

For a more complex job (say, longer cable runs, fireproof cladding, bollards in a garage), it could easily hit $3,000 or more.

Installation pricing can vary depending on your home’s layout, switchboard condition, and the battery brand itself.

So What’s the Final Price Tag?

If we do the maths, here’s a ballpark for total installed costs after rebates:

Budget battery (e.g., AlphaESS Smile5): ~$6,600 + install ($2,000) = ~$8,600

Mid-range (e.g., Sungrow SBR): ~$7,000 + install = ~$9,000

High-end (e.g., Tesla Powerwall 2): ~$10,950 + install = ~$12,950

Add a hybrid inverter if needed, and the total can push slightly higher.

Now let’s talk about whether all this pays off.

How Much Can You Save With a Battery?

This is where things get interesting. Battery savings aren’t one-size-fits-all. It really depends on:

How much solar energy you produce

How much electricity you use at night

The type of electricity tariff you’re on

Your battery size, brand, and whether it’s in a VPP

Let’s look at the Tesla Powerwall 2 again. With 13.5kWh of usable storage, here’s what you might save each year:

On a flat-rate tariff (where you pay the same price all day): ~$730–$1,232/year

On a time-of-use (ToU) tariff (where peak prices apply in the evening): ~$1,677–$2,616/year

That’s a huge difference. Why? Because batteries save the most when they help you avoid expensive peak electricity.

How Long Until a Battery Pays for Itself?

Payback periods vary just as much as savings do. Based on current pricing and rebates:

Flat-rate payback could take 14.5 years in a realistic case, or around 8.5 years in the best-case scenario.

ToU payback is more promising: as little as 4 years, or closer to 6.5 years for most households.

If you’re lucky enough to have access to a generous time-of-use tariff and get your battery at the post-rebate price, you could break even within the warranty period of the battery—which is usually 10 years.

In some areas like Adelaide or Brisbane, the average payback for a 10kWh system is currently modeled at 6 to 8 years, depending on solar production and usage patterns.

What About Feed-In Tariffs?

A lot of people forget this part: when you use your battery at night, you’re not exporting that solar to the grid. So you’re missing out on your feed-in tariff (FiT).

If your FiT is, say, $0.07/kWh and your grid price is $0.35/kWh, you save $0.28/kWh by using battery energy. That’s still a good saving, but it’s not the full $0.35/kWh some dodgy salespeople might promise you.

Time-of-Use: Where the Magic Happens

With time-of-use tariffs, you’re billed less during off-peak hours and more during the evening peak. That’s where batteries really shine. You store free or cheap solar energy during the day and use it when grid prices are sky-high.

Some tariffs even let you top up your battery cheaply at night if your solar runs short. And if you’re on a plan like the Tesla Energy Plan with Energy Locals, you get exclusive rates that make battery ownership even more compelling.

What About Playing the Wholesale Market?

One bold strategy is to use a provider like Amber, which exposes you to wholesale electricity prices that change every 15 minutes.

Prices can spike over $18/kWh during rare grid events—an incredible opportunity to sell your battery power for big returns. But prices can also go negative, meaning you’re paid to use energy and penalised for exporting.

It’s high-risk and not for everyone, but some households have made over $2,000 a year this way. If you’re tech-savvy and willing to play the long game, it could work for you.

So, Is a Battery Worth It in 2025?

Here’s the honest answer: it depends.

If you’re on a flat-rate tariff, live in a low-sunlight area, and use very little power at night, the payback period might be too long. But if you’ve got a good chunk of solar, you’re on time-of-use pricing, and you live in NSW, WA, or NT with access to state rebates—you could be looking at a 5- to 7-year return on your investment.

Add in rising electricity prices and potential VPP payments, and the economics get even better.