Upfront Discount: The rebate is usually offered as an upfront low cost to the battery cost by an accredited retailer or installer, not as a self-purchase. It varies according to the battery sizing, the system configuration, and whether you get involved in a VPP. But like a ballpark figure: Synergy: https://1stlinkdirectory.com/listings13436933/the-ultimate-guide-to-wa-solar-battery-rebate-application