Is a home battery right for your home? (NSW and QLD, 2026)

The short answer

A home battery may suit you if your solar sends a lot of power to the grid by day and you use most of your power after dark. It may suit you less if you use little power or have no solar. What it does for your bill depends on your tariff, your habits and the system you choose.

Last checked 29 Sep 2026. Written by Nick Green.

A battery at a glance

The table shows what tends to point towards a battery and what tends to point away from one.

What may suit you, and what may suit you less
Look at	A battery may suit you	A battery may suit you less
Your solar	It makes more power than you use by day	You have no solar, or you use most of it as it is made
When you use power	Mostly in the evening and overnight	Mostly during the day
How much you use	A fair amount	Very little
Blackouts	You want some power in one, and accept the extra equipment	It is not a concern
Your plans	You plan to stay for a long time	You may move soon

A battery needs solar to get the federal battery discount, so a home with no solar has a bigger decision to make.

What a home battery does

A home battery stores electricity so you can use it later. With solar, that usually means power made in the middle of the day is kept for the evening, instead of being sent to the grid.

A battery does not make power. It moves power from one time of day to another.

A kilowatt hour (kWh) is the unit your power bill uses. Battery sizes are given in kWh too.

Some batteries can also power part of your home in a blackout. That depends on how the system is installed. It is not automatic.

What decides whether it works for you

Four things matter most.

Your tariff. This is the price you pay for power and the price you are paid for power you send to the grid. Some plans charge different prices at different times of day.

Your habits. When you use power matters as much as how much you use.

Your solar system. A battery can only store what your panels make beyond what you use at the time.

The system you choose. The size of the battery and the inverter both change what it can do and what it costs.

There is no single answer, and anyone who gives you one without seeing your bill is guessing.

Work out your own numbers

We do not estimate what a battery would do to your bill on this site. It depends too much on your own tariff and how you use power.

The fit check is the simple way to start. It asks a few questions about your power bill and your home, then shows the battery size that would likely suit you and, where we have one, our installer partner's cash price after the federal discount, before it asks for any contact details. If you ask for a call, Nick can go through your own bill with you.

What the federal battery discount does

The federal Cheaper Home Batteries discount takes an amount off the price of a battery installed with solar. The amount depends on the size of the battery and on the date it is certified. Our guide to the federal battery discount shows the working with examples.

Help in NSW and Queensland

The federal discount applies in every state and territory. These two NSW offers are separate from it.

Virtual power plant (VPP) incentive

An incentive for connecting an eligible battery to a virtual power plant. It is paid by your VPP provider. The amount and how it is paid vary by provider. You need a contract with the provider, and you can claim it once per electricity meter.

Home Energy Saver

Home Energy Saver is a NSW Government-backed loan, not a rebate or a grant. It is offered through approved lenders. The loan is zero-interest, up to a set limit, for the quoted price after rebates. Fees can apply, for example if a repayment is late. You need to be an eligible owner, and an income limit applies.

Home Energy Saver also has a separate discount for some households. NSW advises applying for that discount first if you may qualify. It was not open on 29 Sep 2026.

NSW Government: Home Energy Saver

Queensland households should check the Queensland Government energy pages and ask their electricity retailer what else is open, because state offers change.

Questions to ask before you agree to anything

Is the size in the quote the usable size or the size on the label? The federal discount is worked out on usable size.
Which parts of my home will the battery power in a blackout, if any? Please write it in the quote.
Do I need a new inverter, or can my current one work with this battery?
What warranty covers the battery, the inverter and the installation, and who do I call if something goes wrong?
Will someone inspect my home before the price is fixed?
When will the battery be certified? The federal discount rate is set by that date, not by the date I sign.
What is the total price, installed, with GST included, after the discount?

A good quote answers all of these in writing.

How the fit check helps

The fit check asks a few short questions about your home. It gives you a suggested size, a price range and the federal discount, so you have something to check any quote you receive against. Nick only calls if you ask him to.

For sizing, read what size battery you need.

Common questions

Do I need solar to get a battery?

For the federal battery discount, yes. The battery has to be installed with a solar system, new or existing. A battery that only stores power from the grid is not eligible for the discount.

Will a battery keep my lights on in a blackout?

Not always. Whether a battery supplies power in a blackout depends on how it is installed and set up. Ask which parts of your home it would cover, and ask for that in writing in the quote.

How much difference will a battery make to my bill?

It depends on your tariff, when you use power, the size of your solar system and the size of the battery. We do not estimate it on this site. The fit check shows the battery size that would likely suit your home, and if Nick calls you, he can go through your own bill with you.

Is the federal battery discount available in Queensland?

Yes. The federal discount applies in every state and territory. Other help depends on where you live, so check the Queensland Government energy pages and ask your electricity retailer what else is open.

Can a battery be added to solar I already have?

Yes, but it depends on your inverter. Some inverters can work with a battery. Others need replacing, which changes the price. In Queensland, your installer must also get the electricity network's approval before the battery goes in, and that approval can lower how much power your home may send to the grid. A site inspection settles the rest.

Check what fits your home

The fit check asks a few short questions and gives you a suggested size, a price range and the federal battery discount worked out for your home. Nick only calls if you ask him to.

Start the fit check

This site is run by Nick Green, a solar and battery adviser who works with a licensed installer partner. We do not compare installers. If your home is a good fit and you ask us to, Nick will call you and prepare a quote through that partner. No cold calls, no door knockers, no obligation.

Where the facts come from

These are the official pages behind the rules and figures on this page. Read them yourself if you want to check us.

Last checked 29 Sep 2026

The federal Cheaper Home Batteries discount explained, with worked examples

How the federal Cheaper Home Batteries discount, often called the battery rebate, is worked out, why each extra kWh earns less, and worked examples to check.

What size battery do I need?

A starting battery size for each power bill band, why the fit check pairs a single phase home with a bigger inverter, and the price bands for each size.