Fortress Power | Lithium Solar Batteries & Smart Energy Storage

Fortress Power offers a complete solar energy storage solution with its high-performance lithium iron phosphate (LFP) batteries and advanced hybrid inverters. The Fortress eVault Max, eFlex, and LFP-10 batteries are engineered for maximum safety, efficiency, and scalability—perfect for residential, commercial, and off-grid applications. These batteries include integrated battery management systems (BMS), long cycle life, and certifications like UL 9540 and UL 1973, ensuring compliance with U.S. electrical codes and solar incentive programs. Complementing the battery lineup is the Fortress Power Envy 12kW inverter—an all-in-one hybrid inverter designed for whole-home backup. With a 200A AC passthrough, it supports both grid-tied and off-grid configurations, AC or DC coupling, and seamless integration with Fortress batteries. The Envy inverter is ideal for homeowners looking to achieve energy independence and resilience, offering smart monitoring, fast installation, and reliable performance. Together, Fortress Power batteries and inverters create a powerful solar-plus-storage ecosystem capable of supporting time-of-use savings, demand offsetting, EV charging, and complete grid outage protection. Compatible with top-tier solar panels and third-party inverters, Fortress Power products are trusted by installers across the U.S. and qualify for the 30% federal tax credit (ITC) when installed in eligible systems. From full-home solar storage systems to modular off-grid kits, Fortress Power delivers scalable energy solutions with U.S.-based support, expert engineering, and industry-leading warranties.