EG4 EG4FLEXBOSS18 13kW Hybrid Inverter/Charger

EG4 FlexBOSS18 — 13kW Split-Phase All-in-One Hybrid Inverter | NEMA 4X | 18kW Solar Input

The EG4 FlexBOSS18 is a versatile, grid-interactive hybrid inverter built for homeowners and installers who demand professional-grade performance, advanced grid compliance, and the durability to handle harsh outdoor environments. Engineered for installations where other inverters simply aren't rated to go, Emston Tech Inc provides this unit as a robust solution for coastal and high-humidity areas.

13kW Output with Solar, 10kW from Battery — Whole-Home Hybrid Power
The FlexBOSS18 delivers 10,000W of continuous AC output from the battery alone, boosting to 13,000W of combined output when solar production is available. It intelligently blends grid, solar, and battery power to supply your home's full load without waste or manual switching. This solar-assisted boost extends both daily runtime and long-term battery cycle life by reducing the strain on your battery bank.

18kW of Solar Input — Dual MPPT at 600VDC Max
Two independent MPPT charge controllers accept up to 18,000W of combined PV input at up to 600VDC—the maximum allowed under the National Electrical Code. This higher voltage capacity allows for:

• Longer, more efficient string designs
• Fewer parallel runs and lighter wiring
• Lower balance-of-system costs
• Support for a wide range of rooftop and ground-mount configurations (up to 26A per channel)

NEMA 4X Enclosure — Built for Coastal and Harsh Environments
While most hybrid inverters stop at IP65 or NEMA 3R, the FlexBOSS18 features a NEMA 4X-rated enclosure. This provides full protection against windblown dust, rain, hose-directed water, and corrosive salt spray. Whether you are in a coastal climate or a high-humidity region, Emston Tech Inc ensures your system remains protected without the need for additional weatherproofing.

Integrated Grid Management and Backup
The unit features a built-in 90A transfer switch for seamless grid-to-battery transitions. For a fully integrated experience, pair it with the optional EG4 GridBOSS to eliminate the need for external breakers and additional hardware. It also includes dedicated AUX terminals with generator auto-start functionality, allowing for hands-free management based on your battery's state-of-charge.

Key Features and Technical Capabilities:

• Rapid Shutdown: Integrated RSD transmitter meets NEC 690.12 requirements for roof-mounted systems.
• Multiple Operating Modes: Supports Grid-Tie, Off-Grid, Zero Export, Time-of-Use (TOU), and Force Discharge.
• Fast Charging: 208A integrated battery charger with closed-loop RS485 and CANBus communication for EG4 and third-party lithium batteries.
• Advanced Certifications: UL 1741 SA/SB, California Rule 21, Hawaii Rule 14H, and IEEE 1547-2018 compliant.
• Scalability: Parallel up to 10 units for a combined continuous output of 130kW.
• Efficiency: Low 60W idle consumption with full remote monitoring and configuration via the EG4 cloud platform.

10-Year Warranty
Reflecting our confidence in its long-term durability, the FlexBOSS18 is backed by a 10-year full parts and product replacement warranty through Emston Tech Inc.