Battery Buying Guide
How to Buy a Battery in Australia: Your Essential Guide
Looking to slash your power bills and get backup power for your home? Home batteries can be a game-changer—but knowing **how to buy a battery in Australia** can be tricky. This guide will walk you through everything you need to know: what a home battery does, how it works, and how to find the perfect system for your home and budget.
What Is a Home Battery?
A home battery stores energy generated by your solar system (or the grid) and delivers it when you need it most—like at night or during power outages. It’s a key part of a smart energy system that can save you money and give you energy independence.
Is a Battery Right for You?
Solar batteries aren’t for everyone—but if any of these apply to you, a battery might be a smart move
- ✅ You use a lot of power at night
- ✅ You want backup power during blackouts
- ✅ You’re off-grid or in a fringe-of-grid area
- ✅ You want to reduce reliance on electricity retailers
- ✅ You want to invest and save money
Tip: You don’t need to have solar to install a battery — pairing them usually gives the best return on investment and allows you to generate all your own energy you use.
Choosing the Right Battery Size
Battery storage capacity is measured in kilowatt-hours (kWh). Here’s a rough idea of what you might need
| Household Type | Daily Usage (kWh) | Recommended Battery Size |
|---|---|---|
| 1–2 person household | 5–10 kWh | 5–7 kWh |
| 3–4 person household | 10–20 kWh | 10–13 kWh |
| Large family/home + EV | 20+ kWh | 13–20+ kWh |
Battery size also depends on your goals: bill savings vs backup vs full self-sufficiency.
Retrofit vs New Installation
Already have solar? You’ll likely need a battery inverter or hybrid inverter upgrade
Whats a Hybrid Inverter? See our battery basics
Installing from scratch? A hybrid system is often cheaper and neater
Whats a Hybrid Inverter? See our battery basics
Installing from scratch? A hybrid system is often cheaper and neater
Not all existing systems are battery-ready. We’ll help you check.
Battery Prices & Rebates
| Battery Size | Typical Cost (Installed) | With Rebate (Est.) |
| 5 kWh | $4,500–$6,000 | $3,500–$5,000 |
| 10 kWh | $7,000–$10,000 | $5,000–$8,000 |
| 13.5 kWh | $11,000–$15,000 | $8,000–$13,000 |
State & Federal-Based Incentives (2025)
NSW: Empowering Homes program (interest-free loans)
VIC: Solar Victoria battery rebate up to $2,950
SA: Home Battery Scheme (limited)
Federal: Now there are federal rebates starting 1st of July see our blog post on the new federal rebates
Rebate amounts and eligibility find out more here via our battery rebates page ask our isntallers about the latest information on rebates by submitting your post code here
Common Mistakes to Avoid
- 1. Buying a battery that’s too small or too large
- 2. Choosing a system with limited warranty support
- 3. Not future-proofing for EVs or upgrades
- 4. Forgetting to factor in inverter compatibility
Work with an experienced, accredited installer to avoid these issues.
What to Look for in a Quote
- 1. Is installation included?
- 2. What’s the full warranty length for both battery cells and inverter?
- 3. What happens during a blackout, how is my backup wired?
- 4. Are monitoring apps and smart controls included?
- 5. Is the installer CEC-accredited?
Get at least 2–3 quotes before you decide.
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