Fortress Power Envy Duo 21 Hybrid Inverter | 48V | 25kW PV Input | 12kW Backup | 240V Split-Phase & 208V 3-Phase | Parallel to 120kW | 10-Year Warranty ground mount Storage temperature: 32–113°F (0–45°C)

Storage temperature: 32–113°F (0–45°C)

TECHNICAL SPECIFICATIONS:

Extended Lifespan: Proprietary cooling structure enhances thermal efficiency and reliability

making it easier to move from one place to another

with its interactive LED display and CANBus/RS485 communication protocols

Fortress Power Envy Duo 21 Hybrid Inverter | 48V | 25kW PV Input | 12kW Backup | 240V Split-Phase & 208V 3-Phase | Parallel to 120kW | 10-Year Warranty ground mount Storage temperature: 32–113°F (0–45°C)Power larger solar + storage systems with the Fortress Power Envy Duo 21, a high capacity 48V hybrid inverter built for demanding residential and light commercial energy needs. With up to 25kW PV input, dual voltage compatibility (240V split phase 208V three phase), and scalable paralleling up to 120kW, its a future ready solution for backup power, off grid setups, zero export, TOU optimization, and more. Key Features & Benefits: High PV input