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State Guide

Solar Panel Cost in WA (2026)

Model WA solar ROI with local electricity rates, installed costs, and incentives.

Last updated: 2026-06-25· Source label: EIA residential electricity rates, IRS federal clean energy credit, NREL/PVWatts solar assumptions

Western Australia has the sunniest capital city (5.2 peak sun hours/day) and installed costs of ~AU$1.00/W. A 6.6 kW system costs approximately AU$6,600. STC discounts apply. The Distributed Energy Buyback Scheme (DEBS) pays 10c/kWh peak and 2.5c/kWh off-peak for exports. Electricity rates average 28c/kWh. Payback is typically 4-5 years. Synergy is the dominant utility in the SWIS.

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Avg. Electricity Rate
Solar Payback
Avg. Install Cost
—Climate ZoneASHRAE/IECC heating climate zone classification

Estimates based on wa_au state averages. Your actual cost depends on roof, equipment, installer, and financing.

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Overview

Western Australia has the sunniest capital city (5.2 peak sun hours/day) and installed costs of ~AU$1.00/W. A 6.6 kW system costs approximately AU$6,600. STC discounts apply. The Distributed Energy Buyback Scheme (DEBS) pays 10c/kWh peak and 2.5c/kWh off-peak for exports. Electricity rates average 28c/kWh. Payback is typically 4-5 years. Synergy is the dominant utility in the SWIS.

Use this result

Use the calculator inputs first, then compare the result against local rates, incentives, roof conditions, and utility export rules.

Method, assumptions, and sourcesOpen this section when you want to audit the calculation behind the estimate.Show

Calculation Method

WA solar payback = net installed cost after incentives / annual avoided electricity cost

Key Assumptions

  • Policy last reviewed: 2026-06-25.
  • Electricity rate uses locally-sourced Australia data.
  • Solar installed cost uses industry-certified installer data.
  • Self-consumption rate drives the biggest variance in payback.

Data Sources

Electricity rates

Local utility / regulator

Western Australia (Perth) benchmark electricity rate and feed-in tariff context.

Solar production

PVGIS-SARAH2

For Western Australia (Perth) 5.2 peak sun hours/day solar production.

Solar installed cost

Industry installer data

WA installed cost data.

Policy

Local regulatory body

Supports STC upfront discount scheme administered by the Clean Energy Regulator.

Incentives

Clean Energy Regulator STC

Small-scale Technology Certificates (STCs): ~AU$2,500-3,000 discount on a 6.6kW system.

Formula Assumptions Data Sources FAQ Related Links

Try the Solar ROI Calculator for Solar Panel Cost in WA (2026)→Enter your system size, electricity rate, and state incentives to estimate your solar return on investment.
page_type: State Solar Guide | state_name: Solar Panel Cost in WA (2026) | electricity_rate: | solar_cost_per_watt: | incentives: | net_metering: | estimated_payback: | data_sources: Local utility / regulator(electricity_rates), PVGIS-SARAH2(solar_production), Industry installer data(solar_installed_cost), Local regulatory body(policy), Clean Energy Regulator STC(incentives) | last_updated: 2026-06-25