EG4 | FlexBOSS21 16kw AC Hybrid Inverter | 48V Split Phase | 21kW PV Input | V1.1

FlexBOSS21 16kW AC Hybrid Inverter | 48V Split Phase | 21kW PV Input | V1.1

The EG4 FlexBOSS21 (V1.1) is a high-performance 48V split-phase hybrid inverter designed to meet the demands of modern solar energy systems. With 21kW PV input capacity, three independent MPPTs, and the ability to parallel up to 16 units, this hybrid inverter delivers robust power for both residential and commercial applications.

Whether operating off-grid, grid-tied with backup, or in full grid sell-back mode, the FlexBOSS21 provides seamless integration, smart energy management, and reliable performance. It also pairs effortlessly with GridBOSS ESS and supports closed-loop communication with compatible battery systems.

Note: LCD Display Kit sold separately.

Key Features

• Versatile Operating Modes
  Supports off-grid operation, grid-tied with backup, or full grid sell-back—giving you maximum flexibility for any energy application.

• High Voltage PV Input
  Accepts up to 600V DC input, reducing cable size, minimizing losses, and streamlining installation.

• Triple MPPT Design
  Offers greater solar harvesting efficiency and system design flexibility.

• Scalable Power
  Supports up to 16 units in parallel, enabling massive system expansion up to 256kW AC output.

• Remote Monitoring & Control
  Built-in Wi-Fi for real-time system monitoring and configuration through a user-friendly interface.

• Battery Compatibility
  Integrates with lithium and other battery chemistries using closed-loop communication for enhanced safety and performance.

• Advanced Safety Features
  Includes arc fault protection, ground fault detection, and built-in rapid shutdown for NEC 2020 compliance.

What's Included

• (1) 6000XP Inverter
  
• (1) User manual
  
• (1) Wi-Fi Module
  
• (6) Expansion Bolts
  
• (2) Cross-head bolts M8 Flange Nut
  
• (4) Cross-head bolts M3
  
• (1) Mounting Template
  
• (1) Inverter to  battery Comm. Cable (78in.)
  
• (1) Inverter to inverter Parallel Cable (78in.)

Technical Specs:

• AC Input Range: 120/240VAC or 120/208VAC (Split-phase)
• Power Output: 16kW continuous from PV with a 24kW surge capacity
• Unit Dimensions: 29.5" x 20.5" x 11.2"
• Weight: 88 lbs
• Warranty: 10-Year coverage on core components

Specifications & Manuals

Spec Sheet

User Manual

Warranty

UL 1741 Certificate of Compliance