Most solar battery "quotes" are not quotes at all. Fill in a form on the wrong site and your phone number goes to four or five installers at once, all racing to call you first and win on speed rather than on a fair price. A real quote is slower, more specific, and worth the wait. Here is what one should actually contain, what installed solar battery installation typically costs by size, and how getting matched with one vetted installer works.
What a good solar battery quote should include
Hold every quote you get, from us or anyone else, to this list. If a figure is missing, ask for it.
- Usable capacity in kWh, not a marketing number. A "13kWh" battery and a "13.5kWh usable" battery are not the same thing. A real quote states the usable capacity, because that is what actually runs your evening and your backup.
- The federal discount and your state incentive, shown separately. The federal Cheaper Home Batteries discount (about ~30%, roughly $2,400 to $3,300 off a 10 to 13kWh battery) is one number. Your state incentive, a VPP payment, a low-interest loan or a state rebate, is a separate one. A quote that stacks them into a single headline figure is rounding in its own favour.
- The exact brand and model. "Premium tier battery" is not a spec. A proper quote names the battery, so you can check its warranty and reviews yourself.
- What backup actually covers. Whole-home backup and "essential circuits only" backup are priced differently and protect very different amounts of your house during a blackout. The quote should say which one you are getting.
- Any inverter work needed. If your existing solar inverter isn't already battery-ready, a hybrid inverter or an AC-coupled battery adds real cost. That should be in the price, not discovered on install day.
- Warranty length, in writing. Most batteries carry a 10-year warranty. A good quote states it plainly, along with anything that would void it.
- Confirmation the installer is accredited. In Australia, battery systems must be installed by a Clean Energy Council accredited installer to meet the standards and to qualify for the federal rebate at all. Ask, or better, let us confirm it for you.
- A real install date. "Within a few weeks" is not a date. A quote worth signing gives you an actual booking window.
Typical solar battery installation prices, by size
Price scales mostly with usable capacity. Here is what Australian households typically pay after the federal discount, fully installed, the same figures we work from in the full solar battery cost guide. Your free rebate check returns a number specific to your postcode and setup, not a generic range.
| Battery size | Suits | Indicative installed (after rebate) |
|---|---|---|
| 5 kWh | Smaller homes, modest evening use | $4,000 to $6,000 |
| 10 kWh | Typical family home (most popular) | $7,000 to $10,000 |
| 13.5 kWh | High evening use, some backup | $10,000 to $13,000 |
| 15 to 20 kWh | Large homes, whole-home backup | $11,500 to $17,000 |
A quote that lands well outside these ranges is worth a second look either way. Too high and you may be funding the installer's cold-calling budget. Too low and something in the checklist above, usually the brand, the backup or the warranty, is probably missing.
What happens on installation day
A typical solar battery installation is a one-day job for an accredited installer: mounting the battery, wiring it to a compatible inverter, connecting it to your switchboard, then testing and commissioning it before they leave. Where a switchboard upgrade or hybrid inverter swap is needed it can stretch to a second visit, and a proper quote tells you that upfront rather than on the day. See the full walkthrough in solar battery installation, step by step.