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Cost guide — Solar & Battery Systems · As of Apr 2026

Solar & Battery System Cost in Melbourne.

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Solar + battery pricing depends on system size (kW), inverter type, battery capacity, and whether you qualify for STC and Victorian rebates. Below are typical ranges for residential installs.

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  • Median$15,000
  • Range$7,500–$32,000
  • Mid 50%$11,000–$22,000
  • DatasetIndustry-typical
  • As ofApr 2026
  • Taxex GST

02Pricing tiers

Where your job lands.

Three bands cover the full spread we see. Most jobs land in the typical band — bigger or smaller jobs sit either side.

01

Smaller jobs

$7,500–$11,000

Bottom 25% of jobs we quote — straightforward scope, easy access, fewer line items.

02

Typical

$11,000–$22,000

Middle 50% of completed jobs — most quotes land here.

03

Larger jobs

$22,000–$32,000

Top 25% — bigger scope, harder access, multiple complications stacked together.

03What drives the price

Where the spread comes from.

Each entry below moves the median up or down. Your job lands somewhere on the curve based on how these stack.

01

System size (kW)

6.6kW is the residential sweet spot for most Melbourne homes. Larger systems (10kW+) for high-consumption homes or three-phase. Per kW installed cost decreases with size.

02

Battery capacity (kWh)

A typical Tesla Powerwall (13.5kWh) is around $14K. Smaller batteries (5–10kWh) cost less but suit specific use cases — discuss your usage patterns.

03

Inverter type

String inverter is cheapest. Hybrid inverters (solar + battery in one) are mid. Microinverters (one per panel) are premium but handle shading better.

04

Roof type and complexity

Tiled roof, single-storey, north-facing is the cheapest install. Two-storey, complex roof line, multiple orientations, or skillion roofs add labour.

05

Rebates

STC rebate (federal) is automatic — typically $3K–$6K off depending on size. Victorian Solar Homes program offers additional rebates and zero-interest loans for eligible homeowners.

04In the median price

5 line items.

What's covered when we quote a typical job in this band.

INCLUDED
  1. +01Honest referral to a Clean Energy Council accredited installer we've worked with
  2. +02Advice on what to look for in a solar quote — panel tier, inverter brand, warranty terms
  3. +03Switchboard and meter compatibility review before you commit to a system
  4. +04EV charger integration planning if you want to charge from solar
  5. +05Follow-up electrical work once your system is installed (dedicated circuits, sub-boards, new outlets)

Solar and battery is a specialist trade — panel installation and grid-tie commissioning is best handled by a CEC-accredited solar partner, and that's how we structure the work. The price band above reflects the full installed cost, with the specialist solar component delivered by our partners and the surrounding electrical work — switchboard upgrades, sub-mains, EV integration, metering — handled by us. Rebates are deducted at point of sale where you qualify.

When the cost lands at the upper end

Three-phase supply, complex roof orientations, battery storage above 13.5 kWh, and EV-integrated load management all push a quote above the median. The single biggest variable is whether your existing switchboard and consumer mains supply can carry the new generation — for older boards we often recommend an upgrade in the same engagement so the system is future-proofed for a battery later.

What's included in a Millar Electrics quote

A free on-site assessment with bill analysis, system design and rebate eligibility check, and a written itemised quote within two business days. Supply and installation through our CEC-accredited solar partner, switchboard works and sub-mains coordination by us, all rebate paperwork handled at point of sale, and the Certificate of Electrical Safety lodged with Energy Safe Victoria on completion.

05FAQ

Common questions about cost.

06Compare

How this stacks up.

Other guides in the same audience, ordered by median.

  1. 01Switchboard Upgrade Cost in Melbourne$2,100↑
  2. 02Renovation & Extension Electrical Cost in Melbourne$10,500↑
  3. 03House Rewiring Cost in Melbourne$13,500↑
  4. 04Solar & Battery Systems — this guide$15,000

07From the blog

Read more on this.

Field notes that go deeper on the work behind the numbers.

01 · 10 August 2026

Home battery storage — what the electrical installation actually involves

AC-coupled and DC-coupled battery systems each have different implications at the switchboard. Here's what the installation actually involves — changeover equipment, backup wiring, AS/NZS 5139, and Virtual Power Plant connections.

Read →02 · 1 August 2026

Solar inverter upgrades — when your old inverter is holding back your system

Most Melbourne solar systems installed between 2010 and 2016 have inverters at or past their design life. Here's what signs of underperformance look like, what AS/NZS 4777 compliance requires, and what a hybrid inverter adds.

Read →03 · 23 July 2026

EV charger load management — what it is and when you need it

Load management throttles your EV charger when household demand is high, keeping total draw within your supply limit. Here's how CT clamps, software-based control, and solar integration work in practice.

Read →
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