As soon as your utility approves your interconnection, an installation normally lasts 1 to 3 times for residential rooftop; extended for ground mount. Neighborhood Rebates and Incentives: Some area utilities and municipalities present more rebates and incentives for solar installations. It’s worthy of examining with your neighborhood utility supplier to https://sites.google.com/view/solar-system-western-australia/best-solar-installers-in-wa