EG4 FlexBOSS21 Inverter & EG4 GridBOSS Bundle – 21kW PV Input 48V Split Phase All-In-One Hybrid System (1x FlexBOSS21 + 1x GridBOSS) for Whole-Home Backup, Off-Grid & Large Solar Installations
Model #: FlexBOSS21 + GridBOSS SKU: EG4-FlexBOSS21-GridBOSS-Bundle
Product Details
Product Description for EG4 FlexBOSS21 Inverter & EG4 GridBOSS Bundle – 21kW PV Input 48V Split Phase (1x FlexBOSS21 + 1x GridBOSS)
EG4 FlexBOSS21 Inverter & EG4 GridBOSS Bundle – 21kW PV Input 48V Split Phase All-In-One Hybrid System (1x FlexBOSS21 + 1x GridBOSS) for Whole-Home Backup, Off-Grid & Large Solar Installations
The EG4 FlexBOSS21 Inverter & GridBOSS Bundle is a professional-grade, pre-configured hybrid solar power solution combining one FlexBOSS21 inverter with the GridBOSS 200A MID for seamless grid integration, automatic transfer switching, and whole-home backup capability. Ideal for residential and light commercial off-grid, grid-tie, or backup systems with extensive solar arrays.
Key Features • Massive 21kW PV Input – Dual high-voltage MPPTs support large solar arrays for maximum renewable energy harvest. • High-Power Output – 48V split-phase 120V/240V capability with robust surge handling for heavy loads like central AC, well pumps, dryers, and full-home appliances. • GridBOSS 200A MID Integration – Automatic load transfer, safe grid/battery switching, and support for subpanel configurations. • All-In-One Hybrid Design – Integrated inverter, MPPT charge controllers, transfer switch, and battery charger for simplified installation. • 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 • Output Power: High continuous / surge (specific per spec sheet) • Voltage: 48VDC input, 120/240V AC split-phase output • MPPT: Dual high-voltage • Efficiency: >97% • GridBOSS: 200A MID • Dimensions: Inverter ~30.43 × 22.28 × 11.22 in • Weight: ~88 lbs (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 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.)
