EG4 FlexBOSS21 Complete Hybrid Power System – 16kW Inverter with 14.3kWh WallMount Indoor LiFePO4 Battery & GridBOSS for Whole-Home Backup & Off-Grid (1 Battery Variant)
Model #: FlexBOSS21 SKU: FlexBOSS21-1xWallMount
Product Details
Product Description for EG4 FlexBOSS21 Complete Power System – 16kW Hybrid Inverter with 1x 14.3kWh WallMount Indoor Battery & GridBOSS
EG4 FlexBOSS21 Complete Hybrid Power System – 16kW Inverter with 14.3kWh WallMount Indoor LiFePO4 Battery & GridBOSS for Whole-Home Backup & Off-Grid
The EG4 FlexBOSS21 Complete Power System is a powerful all-in-one hybrid energy solution combining the 16kW FlexBOSS21 Hybrid Inverter, one 48V 280Ah WallMount Indoor LiFePO4 Battery (14.3kWh), Indoor Buildable Conduit Box, and GridBOSS 200A MID for seamless home integration and energy control.
Key Features • All-in-One Hybrid Inverter – 16kW output with 21kW PV input, split-phase 120/240V, transformerless high-frequency design. • 14.3kWh LiFePO4 Storage – One WallMount Indoor Battery with >8000 cycles, built-in BMS, and 15+ year design life. • GridBOSS 200A MID – Automatic load transfer and safe grid/battery switching for whole-home backup. • High Solar Compatibility – 21kW PV input for maximum renewable energy harvest. • Expandable & Scalable – Parallel up to 16 inverters, add more batteries as needed. • Smart Monitoring – RS485/Wi-Fi/CAN communication with app control. • Indoor-Rated Durability – NEMA 4X inverter, reliable operation from -13°F to 140°F. • Certified & Safe – UL-compliant components for code-compliant installations.
Specifications at a Glance Inverter Power: 16kW continuous • PV Input: 21kW max • Battery Capacity: 14.3kWh (51.2V 280Ah) • Charge/Discharge: Up to 200A • Cycle Life: >8000 at 80% DOD • Dimensions (Inverter): 30.43 × 22.28 × 11.22 in • Weight (Inverter): 88 lbs • Battery Weight: 282.2 lbs • Operating Temp: -13°F to 140°F • Warranty: 10 years inverter/GridBOSS, full manufacturer battery warranty
Ready for whole-home backup or off-grid independence? This EG4 FlexBOSS21 system with 1 indoor battery is in stock and ships fast from lithiumion-batteries.com!
(For full technical details, download the datasheet or manual linked on the product page.)
