Commercial solar costs vary widely because system size, roof condition, panel and inverter choice, switchboard upgrades, access and installation complexity all affect the quote. A small business system may cost tens of thousands of dollars, while larger warehouse or industrial installations can cost substantially more, particularly if batteries or substantial electrical work are included. Government incentives and certificates may reduce the upfront cost for an eligible system, but their availability and value depend on current rules and market conditions. Ask several accredited installers for itemised quotes and confirm network, export and connection requirements with your electricity provider.