EG4 FlexBOSS 16 kW AC Hybrid Inverter | 48V Split Phase | 21 kW PV Input | [V1.1] Newest Version
The EG4 FlexBOSS 16 kW AC Hybrid Inverter presents a robust solution for homeowners looking to integrate substantial solar power with reliable backup capabilities. Its 16 kW capacity, coupled with a 48V split-phase design, makes it ideal for larger homes with significant energy needs, offering a powerful and flexible energy management system.
The impressive 21 kW PV input capacity means it can harvest a large amount of solar energy, maximizing your system’s output and potential for energy independence.
Powerful, Flexible, and Built for Energy Independence
The EG4 FlexBOSS21 (V1.1) is a versatile 48V split-phase hybrid inverter/charger, delivering powerful performance and seamless energy management. Designed to handle heavy loadsβincluding a 5-ton AC unitβthis advanced inverter supports 21kW of PV input and can be paralleled up to 16 units, offering a staggering 256kW total continuous output.
Equipped with three MPPTs for maximum solar efficiency, the FlexBOSS21 is fully compatible with the latest EG4 monitoring software, allowing for remote management, mobile notifications, and real-time adjustments. Seamlessly integrates with EG4 GridBOSS for complete control over your Energy Storage System (ESS).
EG4 FlexBOSS 16 kW AC Hybrid Inverter Key Features & Benefits
- β Flexible Power Management β Operate off-grid, with grid support, or sell excess power back to the grid.
- β High PV Input Voltage (600V DC) β Reduces cabling costs and increases system efficiency.
- β Scalable & Powerful β Parallel up to 16 units for large-scale energy solutions.
- β Smart Connectivity β Remote access via Wi-Fi and closed-loop communication with compatible batteries.
- β Advanced Safety Features β Includes rapid shutdown, ground fault monitoring, arc-fault protection, and compliance with top industry standards.
- β Certified for Safety & Compliance: UL 1741 Certified, CEC Solar Equipment Listed

Technical Specifications
- π Input Voltage Range: 120/240VAC (Split-phase) | 120/208VAC
- β‘ Output Power: 16kW continuous (PV input), with 24kW peak surge capacity
- π Dimensions: 29.5β x 20.5β x 11.2β
- βοΈ Weight: 88 lbs
- π Warranty: 10-year standard warranty covering all major components
Why Choose the EG4 FlexBOSS21?
The FlexBOSS21 offers next-level efficiency, durability, and innovation, making it an ideal solution for both residential and commercial applications. With advanced remote monitoring, seamless grid integration, and high-output capabilities, this inverter ensures reliable power and complete energy control.
This newest V1.1 version of the FlexBOSS brings enhanced performance and potentially improved features to an already capable inverter. The hybrid functionality is a key selling point, allowing seamless switching between grid power, solar generation, and battery storage. This ensures your home remains powered during outages and optimizes self-consumption of solar energy, potentially reducing your reliance on the utility grid and lowering electricity bills.
Overall, the EG4 FlexBOSS 16 kW AC Hybrid Inverter is a high-performance unit designed for those who need serious power and flexibility. Its substantial input and output ratings, combined with hybrid capabilities, make it a compelling choice for advanced solar and energy storage setups. For users with a considerable solar array and a desire for reliable backup power, this inverter is definitely worth considering.
π‘ Upgrade Your Solar System Today!
Take control of your energy with the EG4 FlexBOSS21 Hybrid Inverter and maximize your solar potential.









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