What solar batteries cost in Perth
The honest answer is that it depends, and the websites quoting one confident number are usually the ones you should trust least. Here is what actually drives the price, and how to get a figure that reflects your home rather than an average.
Why we do not quote one number
Two Perth homes wanting the same capacity can pay thousands of dollars apart once you account for the inverter, switchboard, backup wiring, and install complexity. A headline price that ignores those factors is marketing, not a quote. We would rather explain the variables than post a number that is wrong for most people.
What actually moves the price
The battery itself
Capacity is the obvious lever: more usable kilowatt-hours costs more. But chemistry, brand, warranty terms, and whether the unit is all-in-one or modular all shift the figure for the same nominal size. A cheaper battery with a weaker warranty is not always the better buy.
The inverter and your existing setup
If your current solar inverter is not battery-ready, you may need a hybrid inverter or a separate battery inverter, which changes the total meaningfully. Homes adding a battery to existing solar sometimes face more work here than homes installing solar and storage together.
Installation complexity
Switchboard condition, cable runs, single versus three-phase supply, and where the battery can legally be mounted all affect labour. A tidy install into a modern board near the meter is cheaper than one needing an upgrade and long cabling.
Backup wiring
Configuring the battery to power selected circuits during an outage adds parts and labour. If blackout protection matters to you, factor it in early, because it is a design decision rather than an afterthought.
How the WA rebate changes the maths
Western Australia has a battery rebate that reduces the upfront cost for eligible Synergy households, within a capped amount. It genuinely moves the payback calculation, but the exact benefit depends on your battery size and eligibility, so treat it as part of a full quote rather than a flat discount. Our rebates page covers the current WA scheme and who qualifies.
Getting a price that fits your home
The most useful number is one calculated for your actual usage, roof, and existing equipment. That means sharing your bills or smart-meter data and getting quotes from installers who ask about them. Beware of any quote handed over before anyone has understood how you use electricity.
"Is this price fully installed, including the inverter and any switchboard work?"
Make sure you are comparing complete quotes, not just the battery hardware.
"Does this figure already have the WA rebate applied, or is it before the rebate?"
Quotes presented differently can look thousands apart when they are actually close.
"What would change the price up or down from here?"
A good installer can name the variables specific to your home.
"What does the warranty cover, and for how many years or cycles?"
A lower price with a weaker warranty may cost more over the battery's life.