Add to Cart Fortress Power Fortress Power FlexTower All-in-One Enclosure $2,599.00 Fortress Power FlexTower All-in-One Inverter + Battery Enclosure. (Battery and Inverter not included). $100 off with coupon code FLEXT100 The FlexTower All-in-One is a whole home energy storage solution. It houses... Compare Add to Cart Add to Wishlist