Solar battery cost Perth 2026: full price guide with rebates

Installed prices by system size

The following prices represent typical Perth installed costs as of March 2026, including the battery, hybrid inverter (if required), installation labour, electrical work, and Western Power connection application. All prices are before rebates.

Smaller batteries have a higher per-kWh cost because installation labour and electrical work are relatively fixed regardless of battery size. For most Perth households, the 10 kWh size range offers the best balance of value and utility.

Prices by brand

Brand pricing varies significantly. Here's what Perth homeowners can expect for popular battery brands in 2026 (installed, before rebates):

• Sungrow SBR (9.6–12.8 kWh): $8,000–$11,000 — lowest cost per kWh in this list, requires a Sungrow hybrid inverter
• BYD Battery-Box HVM (10.2–13.8 kWh): $9,000–$13,000 — works with Fronius, GoodWe, and other inverters
• Sigenergy SigenStor (5–30 kWh): $8,500–$14,000 — modular LFP, AC and DC-coupled options, strong WA market presence
• GoodWe Lynx Home U (10–13 kWh): $8,500–$11,000 — competitively priced, suits smaller homes
• Enphase IQ Battery (10 kWh): $10,000–$13,000 — AC-coupled, suited to retrofits
• Tesla Powerwall 3 (13.5 kWh): $12,000–$15,000 — includes an integrated inverter; note: not WA SSL eligible — no $1,300 state rebate applies

WA rebates and how they stack

Perth homeowners can access multiple rebates that significantly reduce the out-of-pocket cost. Here's how they combine for a typical 10 kWh installation:

1. Federal stcs (small-scale technology certificates)

STCs provide an upfront discount applied by your installer at the point of sale. For a 10 kWh battery under the current 6.8 STCs/kWh factor (in force since 1 May 2026), the rebate is approximately $2,720 — down from ~$3,360 under the legacy pre-May factor of 8.4.

2. Federal cheaper home batteries program

This program provides additional federal subsidy on top of STCs. The exact amount depends on your battery size and the current program phase. Combined with STCs, federal support typically covers 25–35% of the installed cost.

3. WA residential battery scheme

Synergy customers receive $130/kWh for the first 10 kWh of battery capacity, up to a maximum of $1,300. Important: your battery must be on Synergy's Supported Solutions List (SSL) to qualify.

4. Interest-free loan

Eligible WA households (combined income under $210,000) can access up to $10,000 in interest-free finance through the WA Residential Battery Scheme. Repayment terms range from 3 to 10 years with no early repayment fees. This can be used for both the battery and accompanying solar panels if installed together.

Worked example: 10 kWh battery in Perth

Why prices have dropped

Several factors are driving the continued decline in Perth battery prices:

• Manufacturing scale: Global battery production capacity has expanded significantly, with CATL, BYD, and other manufacturers achieving economies of scale
• LFP dominance: The shift from NMC to LFP chemistry has reduced raw material costs — LFP uses iron and phosphate instead of expensive cobalt and nickel
• Installer competition: With over 500 SAA-accredited battery installers now operating in WA, competitive pressure keeps margins in check
• Government incentives: The expanded federal program and WA scheme have increased volume, allowing installers to negotiate better wholesale pricing

Hidden costs to watch for

• Switchboard upgrade: Older Perth homes may need a switchboard upgrade to accommodate a battery system — typically $500–$1,500 additional
• Meter reconfiguration: A new smart meter or meter reconfiguration may be required — usually $200–$500
• Inverter replacement: If your existing solar inverter isn't compatible, a hybrid inverter upgrade adds $2,000–$4,000
• Extended cable runs: If your battery location is far from the switchboard, additional cabling may add $200–$800