Is a home battery worth it for me?

What would the battery add to the solar I already have?

Solar electricity used directly by your home is already reducing imports. Do not count that saving again as a battery benefit. Storage can move otherwise-surplus energy to a later time, but it uses some energy in the process and gives up the export payment that solar could have earned.

For an illustration, assume the battery delivers 6.5 kWh a day on average across a full year, avoiding imports at 35 cents per kWh. With 90% whole-cycle efficiency, it needs about 7.22 kWh of charging solar. At a 6-cent feed-in rate, the forgone export income is about 43 cents a day. The additional value is about $1.84 a day, or $672 a year, before other costs.

The daily average needs a full-year basis. Multiplying a bright summer day by 365 can overstate the energy available in winter or ignore days when the household has little later demand. Ask the installer to show how seasonal generation and your own imports were used.

Can I make the existing solar work harder first?

Before buying storage, consider a suitable load you can move into a solar surplus. If that reduces evening imports, include the improved routine in both battery scenarios. You can then see what useful job remains for the battery. A home with most demand already in daylight may have a different result from one buying power every evening.

How do I compare the cost after rebates?

Use a complete installed quote, including the inverter, electrical work and backup equipment you need. Subtract only confirmed discounts that are not already included. As at 13 October 2026, federal support is available for qualifying battery installations; the amount depends on the installation date and eligible capacity. Ask for the discount and payment timing on the quote.

If the assumed net installed cost is $9,000 and the extra annual saving is $672, simple payback is about 13.4 years. This divides cost by one year’s saving. It does not account for interest, changing tariffs, battery ageing, maintenance or replacement, so it is a starting comparison rather than a promised recovery date.

For a financed purchase, put the loan repayments beside the expected bill reduction. The loan may reduce cash needed on installation day, but the borrowed amount still needs repayment. Ask for the total repaid and a conservative savings case, especially when the estimate depends on a particular tariff staying available.

Is the larger battery the better investment?

Ask for the extra cost and extra annual saving from the larger option. If another $4,000 of capacity adds only $200 a year in savings, its marginal simple payback is 20 years. That is how long the extra annual savings would take to cover the extra cost. If it adds $800, that becomes five years. Use the same household and tariff in both comparisons so the extra capacity earns its own place.

The national average cannot answer that question for your home. The Clean Energy Regulator reports average approved capacity falling from 36 kWh in April 2026 to 23 kWh in May and June after program changes. Those installation statistics explain the market at that time; they do not prescribe a size or prove that every household will need more.

What changes if I charge from the grid or join a VPP?

If grid charging is allowed, compare the charging price, losses and later import price avoided. Include the length of the cheap period and charging power. Then price the rest of the household’s electricity on that plan. A very low charging rate can coexist with higher costs during the hours you heat the home or cook dinner.

Keep VPP benefits in a separate comparison until you have a confirmed offer and operating assumptions. As at 13 October 2026, our Battery Power Top-Up (opens in a new tab) offers a $60 quarterly bill credit for eligible participation. That credit is one part of the result; any changed imports, exports or electricity-plan costs still belong in the annual calculation.

How much is blackout protection worth to me?

Backup can be a reason to buy even when financial payback is long. Ask for the circuits, continuous output, reserve and ability to recharge from solar during an outage. Give the installer a list of the equipment you want to keep running. A stored-energy figure alone does not establish that the installation supplies the home during a blackout.

The practical next step is a comparison you can explain: this size, this complete price, this much additional saving, and these backup jobs. Take a year of bills or interval data and your solar information to two installers. Ask for both a smaller and a larger suitable option, with the assumptions written down.

Related advice: How to choose a home battery · Battery rebates in the ACT and NSW: what can I get?

Want a quote based on your home

You can use this guide’s comparison whether you’re an ActewAGL customer or with another retailer. Our battery storage page (opens in a new tab) connects you to battery options and the quote route through Electrify with ActewAGL. Check eligibility, and take your bills, solar information and backup priorities into the quote.

See what you can save with Electrify (opens in a new tab)