Is $31,000 to install a solar energy system with battery and EV charger a fair price?
Project Details
I received this recent quote for a solar energy system and would like feedback on whether it is overpriced and suitable for my home. My house is a 42-square double-story home, south-facing, and the panels will be installed on the north and west sides. Based on my highest monthly bill, my peak hour usage is 280 kWh and off-peak usage is 430 kWh. I have a 3-phase power supply and currently use solar gas for hot water and stove, which I plan to replace in two years.
Quote Details
This quote is for a comprehensive solar energy system, including panels, inverter, battery storage, and an EV charger. The total cost is 31,000 AUD after rebates. - Solar Panels: 22x SunPower 455W P7 Bi-Facial - Panel Technology: Sleek all-black design, advanced N-type TOPCon & Bi-Facial technology - Panel Warranty: 30-year manufacturer warranty - Panel Product Code: SPR-P7-455-BLK (IEC 61215-2021) - Panel Power Rating: 455W - Inverter: 1x Sigenergy SigenStor EC10.0 TP - Inverter Description: Compact all-in-one energy solution integrating a three-phase hybrid inverter, battery modules, optional EV charger, and smart energy management - Inverter Product Code: SigenStor EC10.0 TP - Inverter Power Rating: 10000W - Solar Battery: 1x Sigenergy SigenStor BAT 24.0 - Battery Capacity: 23.4kWh of useable energy - Battery Mounting: Floor mount - Battery Product Code: SigenStor BAT 24.0 - EV Charger: 1x Sigenergy Sigen EV AC Charger 7kW - EV Charger Description: Single Phase AC EV Charger for charging from grid & PV rooftops, includes integrated 5m Type 2 lead - EV Charger Product Code: Sigen EVAC 7 4G T2-WH - Installation: Completed by an Essential Solar approved, highly trained, fully SAA qualified installation team - Backup Power: Battery system configured to provide power during outages; backup time determined by battery energy and load - System Notes: Export limited as per distributor approval - Racking: Broad Standard Range racking included - Customer Responsibility: Supply 22x spare roof tiles for replacement of any broken during installation - Site Inspection: Subject to site inspection - Documentation: Product data sheets available in Appendix A
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More Details
Category
Solar
Price
$31,000
Quote Date
February 1, 2026
Home Size
4,200 sq ft
Battery Storage?
No
# of Panels
22
System Size (kW)
10.01
Warranty (yrs)
30
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