Is a solar battery worth it in SA?
For some SA homes, yes. For others, more solar or a better plan does more. It comes down to what you pay for evening power and what you earn for exports.
A battery is usually worth it when you export plenty of solar and buy expensive power at night. South Australian retailers paid zero to 5.5 cents for exports at 30 June 2026, so storing solar often beats selling it. Payback can be longer than solar alone, and it depends on your bill.
Answered by Chris Bull, Managing Director Chris Bull on LinkedIn (opens in a new tab).
Why SA homes look at batteries
The maths is simple. Every kilowatt-hour you store is one you do not sell for a small feed-in credit and do not buy back at your evening rate. The bigger that gap, the harder the battery works.
ESCOSA recorded retailer feed-in tariffs from zero to 5.5 cents per kWh at 30 June 2026, down from a range of zero to 6 cents a year earlier. Check your bill for what you pay and what you earn.
What the government says it can save
In May 2025 the federal department estimated a battery with rooftop solar could deliver $700 to $1,600 a year in savings, with the battery providing $300 to $900 of that. That is a national estimate from before the May 2026 program changes. It is not an SA figure and it is not a promise.
The government’s solar guide also warns that batteries have a high upfront cost and can take longer to pay back than solar panels.
When a battery makes sense
These signs point towards yes.
- You export a lot of solar during the day
- Your evening and overnight usage is high
- You have a heat pump, EV or reverse cycle system to shift
- You want backup in a blackout, and the system is set up for it
- Your solar is sized to refill the battery most days
When it may not
These signs point the other way, or at least towards waiting.
- You still have the 44c feed-in tariff, which stops if you install storage
- Your solar barely covers your daytime use
- You can move most of your usage into the middle of the day
- You could get more from a better electricity plan first
Compare the alternatives
A battery is not the only fix. Since 1 July 2026, retailers with more than 1,000 customers must offer the opt-in Solar Sharer Offer, with free power from 12pm to 3pm in South Australia for homes with a smart meter. Moving loads into that window may beat storage for some households, and it can work alongside one.
A virtual power plant can add value too, but the terms belong to each retailer. Read them carefully, because the operator may use your battery when you might want it.
Work it out on your own bill
SunSPOT is a good independent first check. For a detailed answer, we go through your power bill at a 90-minute in-home consultation and show the ROI for your home, including the case for not buying one. Book a bill audit.
Common questions
Is a solar battery worth it in 2026?
It can be, especially at the current STC factor of 6.8 and with feed-in tariffs this low. The answer depends on your evening usage and solar size, so run your own numbers.
How long will a 10kWh battery last?
On a steady 1kW load, about 10 hours of usable storage if all 10kWh is usable. Air conditioning, cooking or EV charging will drain it much faster.
Is it better to have more solar or more batteries?
If your solar cannot refill a battery, add panels first. The government notes batteries can take longer to pay back than solar, and that a battery too large for your solar limits the benefit.
Will a battery keep my power on in a blackout?
Only if it is set up for backup. Some systems run part of the home and some run all of it, so confirm this before you sign.
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