Three leading brands at this size. Tick compare on two to weigh them inside your plan.
Ideal for daily consumption between 30 and 45 kWh.
45 kWh* annual daily average (Zone 3, Perth irradiance)
Adding one carries it into your plan. The exact model and phase are confirmed in the written quote.
Goodwe EHB 8.6
Hybrid inverter · 1-phase
$3,090*
Fronius Primo GEN24 8.0
Hybrid inverter · 1-phase
$4,190*
Sigenergy Sigen EC SP 8.0
Hybrid inverter/controller · 1-phase
$4,890*
These are the variables that change an installation cost in Perth. We publish them so your quote holds no surprises.
| Variable | Baseline | Indicative uplift | Why it costs more |
|---|---|---|---|
| Double storey | Single storey | $550+ | Height triggers additional fall-arrest and edge-protection requirements, longer cable runs from array to switchboard, and in most cases a larger access plant on site for the day. |
| Tile or terracotta roof | Tin (Colorbond) roof | $110 – $660 | Tile mounting requires individual tile lifting and bracket seating rather than direct rail clamping, and terracotta in particular carries a breakage allowance. |
Storage is optional here. Adding it switches your plan to solar + battery.
Tesla Powerwall 3
13.5 kWh · all-in-one AC system
$11,490*
Goodwe Lynx Home F G2
16 kWh · DC-coupled
$5,590*
Sigenergy Sigen Battery
24 kWh · modular combination
$10,390*
*Prices are package-contribution guides sourced June 2026, subject to site inspection and current promotions. They are not an offer and are confirmed at quote. Savings are modelled on Synergy Home Plan A1 (33.2621 c/kWh from 1 July 2026) at 70% of generation used on site, north-facing array at 25° pitch, Zone 3 Perth irradiance. Rebate figures are 2026 values at $38/STC, Zone 3. Your quote confirms exact figures. Basis reviewed 2026-08-07.
| Three-phase supply | Single-phase supply | $400 – $1,200 | Three-phase properties need a three-phase inverter, which sits at a higher price point than its single-phase equivalent. |
|---|
| Coastal / salt-mist zone | Inland metropolitan | $200 – $900 | Properties near the coast need corrosion-rated mounting hardware and, on some manufacturers, a specific salt-mist-certified panel to keep the product warranty intact. |
|---|
| Switchboard upgrade | Compliant existing board | $165 – $2,490+ | Older boards frequently lack the space, main-switch rating or RCD protection a solar connection requires. |
|---|
