Home Slickdeals Costco Members: EcoFlow 7200Wh/240V DELTA Pro Whole Home Battery Backup System $3999.99 Slickdeals Costco Members: EcoFlow 7200Wh/240V DELTA Pro Whole Home Battery Backup System $3999.99 By ARCOM - 22 February 2024 6 0 SHARE Facebook Twitter Go to the deal page: Costco Members: EcoFlow 7200Wh/240V DELTA Pro Whole Home Battery Backup System $3999.99