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Installers and DIY builders get a 48V split-phase hybrid inverter in the EG4 FlexBOSS18. It offers 13kW continuous output with PV, 18kW of solar input, and 10kW battery-only output.
Planning a system? Read our guide: How to size a battery backup system for your home.
For residential and commercial systems, new or upgraded, that want hybrid operation with or without the grid.
EG4 FlexBOSS18 Hybrid Inverter | 48V Split Phase | 18kW PV Input The EG4 FlexBOSS18 Hybrid Inverter delivers professional-grade performance at an accessible price point, making it the ideal choice for both installers and DIY enthusiasts looking for a cost-effective hybrid solar solution. Designed to maximize efficiency and savings, this inverter offers 13kW continuous output (with PV), 18kW maximum solar input, and 10kW battery-only output capability. Whether you're aiming to reduce reliance on the grid or build a powerful off-grid system, the FlexBOSS18 provides the perfect balance of affordability, performance, and versatility. Key Features: High Power Output: 13kW continuous output with PV, 18kW solar input, and 10kW battery-only output. Versatile Compatibility: Works flawlessly with EG4 batteries and pairs seamlessly with the EG4 GridBOSS MID for enhanced functionality. Certified & Compliant: UL1741 certification for safety and reliability. Cost-Effective Hybrid Solution: Affordable entry into hybrid solar with professional-grade capabilities. Flexible Installation: Designed for easy integration into both residential and commercial setups. Seamless Integration with EG4 GridBOSS MID The FlexBOSS18 pairs perfectly with the EG4 GridBOSS MID, optimizing energy management and grid interaction. This integration reduces installation costs, simplifies the setup, and eliminates the need for additional breakers, transfer switches, and more, all within one compact solution. It also enables time-of-use optimization, load shifting, and backup power prioritization, giving you enhanced control over your energy use. By combining the FlexBOSS18 with the EG4 GridBOSS MID, users can maximize energy efficiency, reduce dependency on the grid, and take full control of their solar energy system. Why Choose the EG4 FlexBOSS18? The FlexBOSS18 offers higher power output, increased PV capacity, and enhanced hybrid capabilities at an accessible price point. Its UL1741 certifications ensure compliance with strict industry regulations, making it a reliable and future-proof investment for both grid-tied and off-grid applications. Elevate Your Energy System Discover the power, flexibility, and affordability of the EG4 FlexBOSS18 Hybrid Inverter. Whether you’re upgrading an existing system or starting from scratch, the FlexBOSS18 delivers the performance and reliability needed to take control of your energy future. Explore more EG4 products and find the perfect solution for your energy needs. From unboxing to install, we’re with you every step. Reach out to our lifetime, USA-based support team anytime you need guidance.
Warranty terms mentioned in this description are the manufacturer’s. Our own coverage is the 30-day limited warranty.
We confirm compatibility, installation requirements, and delivery details with you during order review, before any payment. Home electrical work may require a qualified installer.
Talk to our team about pairing the FlexBOSS18 with a GridBOSS. Message our team on WhatsApp.
EG4
Blending grid, solar, and batteries, the EG4 FlexBOSS18 is an all-in-one 120/240V hybrid inverter for a 48V bank. Continuous AC output is 10kW, rising to 13kW when solar is present.
$2,479.99
EG4
For rural and suburban homeowners, the EG4 12kPV is a 48V split-phase hybrid inverter that works off-grid, grid-tied with battery backup, or with a generator. It shares its architecture and firmware with the EG4 18kPV.
$2,399.99
EG4
Separate charge controllers, transformers, and battery monitors are replaced by one device in the EG4 12kPV. This 48V hybrid inverter delivers 8kW and accepts 12kW of solar input for grid-tied, off-grid, or hybrid systems.
$2,359.99
EG4
Powerful enough to start a 5-ton AC unit, the EG4 FlexBOSS21 (V 1.1) is a 48V split-phase hybrid inverter/charger. It supports 21kW of PV input across three MPPTs.
$2,879.99