What Makes Up the Total Installation Cost?
A typical residential solar installation cost includes several components: the solar panels themselves (usually 30–40% of the total), the inverter (10–15%), mounting and racking hardware (5–10%), electrical components and wiring (5–10%), and labour and installation (25–35%). Costs also include design, permitting, and grid connection fees, which vary by region. Our calculator uses all-inclusive cost-per-kW figures that cover the complete installation.
Getting the Best Value from Your Installation
To get good value, get at least three quotes from certified installers. Compare not just headline price but also equipment quality, warranty terms, and installer track record. Tier-1 panels and reputable inverter brands (like Enphase, SolarEdge, or Fronius) typically cost slightly more but offer better performance guarantees and longevity. Our estimates assume mid-range equipment that balances cost and quality.
Hidden Costs and What to Watch For
Some costs aren't always included in initial quotes. Scaffolding may be extra for multi-storey homes. If your electrical panel needs upgrading to accommodate solar, that can add $500–2,000. Roofing repairs or reinforcement, if needed, are your responsibility. Some installers charge extra for monitoring systems. Export meter installation may have a fee in some regions. Building consent or permitting costs vary widely—some areas charge nothing while others require several hundred dollars in permits. Always ask for a fully itemised quote and clarify what is and isn't included.