Solar System Costs
Typical installed prices (after STCs):
- 5kW system: $4,000-7,000
- 6.6kW system: $5,000-8,000
- 10kW system: $8,000-12,000
- 13.3kW system: $10,000-15,000
Battery Costs
- Tesla Powerwall 2 (13.5kWh): $12,000-15,000 installed
- BYD (10kWh): $8,000-11,000 installed
- Smaller batteries (5kWh): $5,000-8,000 installed
What Affects Price
- Panel quality: Premium vs budget brands
- Inverter: String vs micro-inverters
- Roof type: Tin easier than tile
- Roof condition: May need repairs first
- Stories: Two storey adds cost
- Switchboard: May need upgrade
Payback Period
Typical payback is 3-7 years depending on:
- Your electricity usage
- Feed-in tariff in your state
- How much you use during the day
- System size relative to usage