Is a Home Battery Worth It in Adelaide? (Honest Assessment)

Battery storage is the most asked-about topic in Australian solar right now. The short answer: for many Adelaide homeowners, yes, but the maths depends heavily on your specific situation.

What's changed

Battery prices have fallen around 50% over the past five years. The Tesla Powerwall 3, BYD, and Sungrow batteries are all now available at price points that make financial payback achievable within 7–10 years for many households, compared to 12–15 years just a few years ago.

SA feed-in tariffs have also dropped significantly (from 16c+ to around 5–8c/kWh), which changes the calculation. Exporting to the grid is now much less valuable. Storing energy for your own use instead of exporting it is increasingly the better financial move.

The core maths

You pay roughly 32–35 cents per kWh when you import power at night. You receive 5–8 cents per kWh when you export. Every kWh your battery stores and you use at home saves you the import rate instead of earning you the export rate, a difference of approximately 27 cents per kWh.

A 10kWh battery that cycles fully every day saves around $985 per year at that spread. At a battery cost of $10,000–$13,000 (after any SA Home Battery Scheme rebate), that's a 10–13 year payback, before any electricity price increases.

Factor in the SA Home Battery Scheme rebate and a VPP program, and that payback can shorten to 7–9 years. With 10+ years of remaining life at that point, the financial case is solid.

When the maths doesn't work

If you're home during the day and self-consuming most of your solar already, a battery adds less value. If you have a small solar system (under 6.6kW), you may not generate enough surplus to charge a battery meaningfully.

If your primary goal is backup power during blackouts (increasingly relevant in SA), the financial payback is less relevant, you're paying for insurance value, not just energy savings.

Our recommendation

Every system we install is battery-ready. We never design a solar installation that would require rewiring to add a battery later. If battery economics make sense for your situation now, we'll include it in the proposal. If not, we'll design the system so you can add one when prices drop further or your situation changes.