Astro is rated being a Tier 1 manufacturer for solar panels, making them a trustworthy model by solar industry experts in Australia and throughout the world. You should use our discounts and payback calculator to get success for just a 6.6kW solar system which might be specific on your consumption https://commercial30kwsolarinstallationwa.blogspot.com/2023/02/the-benefits-of-66kw-solar-system-in.html