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

EG4® FlexBOSS21: High-Capacity, Hybrid Inverter for Smart Solar Solutions

The EG4 FlexBOSS21 is a cutting-edge, split-phase hybrid inverter engineered to meet the demands of modern residential and small commercial solar energy systems. Designed for efficiency and power, the EG4 FlexBOSS21 delivers up to 21kW of usable PV (DC) input, generating up to 16kW of AC power with solar PV and 12kW even without sunlight, ensuring continuous energy supply around the clock.

This next-generation inverter is built to work seamlessly with EG4’s GridBOSS MID power gateway, making the EG4 FlexBOSS21 one of the most efficient and installation-friendly inverters on the market. It supports a feed-through of 90 Amps of utility power from the grid at 120/240 VAC, maximizing both flexibility and performance.

By integrating the EG4 FlexBOSS21 with the GridBOSS, you benefit from reduced installation costs, minimized component requirements, and a scalable infrastructure that’s ideal for expanding energy systems. Together, they form a cost-effective, robust, and reliable solar power solution.

Key Features of the EG4 FlexBOSS21

• Unmatched PV Capacity:
  Industry-leading 21kW usable PV input, 24kW max input.

• Expandable Design:
  Scales effortlessly from 50 to 160 Amps (equivalent to full 200A service), making the EG4 FlexBOSS21 perfect for both small and large-scale setups.

• High Efficiency:
  Generates 16kW AC with solar and maintains 12kW without sunlight—ensuring energy reliability.

• Compact Footprint:
  Delivers exceptional performance in a sleek, space-saving form factor.

• Smart MPPT Configuration:
  Three MPPTs rated at 26A/26A/15A, supporting up to 5 strings, with a capacity for 13A panels across 3 orientations.

• Optimized for Grid Integration:
  When combined with GridBOSS, supports AC coupling, smart loads, and generator input.

EG4 FlexBOSS21 Technical Specifications

• PV Input:
  21kW usable (max), 24kW max input capacity.

• On-Grid AC Output:

  • 16kW @ 240V

  • 13.8kW @ 208V

  • 12kW output to loads/battery without PV

  • Full 16kW delivery to grid or loads with PV/battery

• AC Output Specifications:

  • Nominal Current: 50A

  • Voltage Options: 120/240V, 120/208V, 240V

  • Continuous Output Power: 12,000VA

  • Easily starts a 5-ton AC unit

• Dimensions:
  30.4 × 22.3 × 11.2 inches

• Weight:
  88 lbs.

• Warranty:
  10-Year Manufacturer Warranty

Whether you are upgrading an existing system or building a new one from the ground up, the EG4 FlexBOSS21 delivers unmatched power, scalability, and convenience. For anyone seeking a reliable hybrid inverter with seamless grid compatibility, the EG4 FlexBOSS21 is the top-tier choice.

Specsheet
FlexBOSS-21-Manual