EG4 FlexBOSS21 Inverter & EG4 GridBOSS Bundle (2x FlexBOSS21 + 1x GridBOSS) – 21kW PV Input 48V Split Phase Dual-Inverter Hybrid System for Whole-Home Backup, Off-Grid & Large Solar Installations
Model #: FlexBOSS21 x2 + GridBOSS SKU: EG4-FlexBOSS21-GridBOSS-Double-Bundle
Product Details
Product Description for EG4 FlexBOSS21 Inverter & EG4 GridBOSS Bundle (2x FlexBOSS21 + 1x GridBOSS) – 21kW PV Input 48V Split Phase
EG4 FlexBOSS21 Inverter & EG4 GridBOSS Bundle (2x FlexBOSS21 + 1x GridBOSS) – 21kW PV Input 48V Split Phase Dual-Inverter Hybrid System for Whole-Home Backup, Off-Grid & Large Solar Installations
This high-power EG4 bundle pairs two FlexBOSS21 inverters with the GridBOSS 200A MID for massive scalability, true 120V/240V split-phase output, and seamless grid integration. Designed for demanding residential or light commercial setups, it provides robust whole-home backup, large off-grid systems, or grid-tie with battery storage and extensive solar arrays.
Key Features • Dual FlexBOSS21 Inverters – Combined high-power output with 21kW PV input per unit for maximum renewable energy harvest. • GridBOSS 200A MID Integration – Automatic load transfer, safe grid/battery switching, and support for subpanel configurations across the system. • Massive PV Input – Dual high-voltage MPPTs per inverter support large solar arrays. • 48V Split-Phase Output – True 120V/240V capability with robust surge handling for heavy loads like central AC, well pumps, dryers, and full-home appliances. • Hybrid Functionality – Off-grid, grid-tie, or backup modes with automatic transfer switch. • 48V Battery Input – Compatible with lithium (LiFePO4), AGM, gel, or flooded batteries. • Advanced Monitoring – LCD display and optional app/Wi-Fi for real-time system status. • Rugged & Reliable – NEMA 3R rated for indoor/outdoor use, wide temperature range.
Specifications at a Glance PV Input: 21kW max per inverter • Output Power: High continuous / surge (specific per spec sheet) • Voltage: 48VDC input, 120/240V AC split-phase output • MPPT: Dual high-voltage per inverter • Efficiency: >97% • GridBOSS: 200A MID • Dimensions: Inverter ~30.43 × 22.28 × 11.22 in • Weight: ~88 lbs per inverter + GridBOSS • Operating Temp: Wide range with protections • Warranty: Manufacturer warranty
Whether for whole-home backup during outages, large off-grid systems, or grid-tie with battery storage, the EG4 FlexBOSS21 & GridBOSS Double Bundle delivers professional-grade reliability and scalability. Order now — stocked and ready to ship from lithiumion-batteries.com!
(For full technical details, download the manual linked on the product page.)
