EG4 FlexBOSS18 Hybrid Inverter | 48V Split Phase | 18kW PV Input

The EG4 FlexBOSS18 Hybrid Inverter is a powerful, all-in-one solution designed for homeowners, DIYers, and installers looking for a cost-effective way to maximize energy efficiency. Whether you’re building a fully off-grid system or optimizing grid-tied energy use, this inverter delivers professional-grade performance at an accessible price.

Key Features

High Power Output

• 13kW continuous power with PV input
• 18kW max solar input
• 10kW continuous battery-only output

Seamless Grid & Battery Integration

• Works in grid-tied, off-grid, and hybrid setups
• Supports closed-loop communication with EG4 batteries
• Compatible with the EG4 GridBOSS MID for advanced energy management

Industry-Leading Compliance & Safety

• UL1741-certified for safety and reliability
• Built-in Rapid Shutdown (RSD) for NEC 690.12 compliance
• Multiple protection features, including PV reverse polarity, surge, and short-circuit protection

Efficient & Cost-Effective Solar

• Up to 600VDC PV Input, eliminating the need for a combiner box
• Dual MPPT technology for optimized solar harvesting
• 94% battery-to-grid efficiency and 97.5% PV-to-grid efficiency

Easy Installation & Monitoring

• Wall-mountable design with a compact footprint
• Plug-in Wi-Fi module for remote system monitoring via the EG4 app
• 90A grid bypass for seamless power flow

Why Choose the EG4 FlexBOSS18?

The FlexBOSS18 is engineered for those who want high performance without the high price. With increased PV capacity, hybrid capabilities, and certifications for grid compliance, it’s a future-proof investment for energy independence.

Pairing this inverter with the EG4 GridBOSS MID unlocks additional features like time-of-use optimization, load shifting, and backup prioritization—giving you full control over your energy system.

Specifications

Power & Output

• AC Output: 120/240V split-phase | 13kW max | 10kW battery-only
• Max PV Input: 18kW (600VDC) across two MPPTs
• Surge Capacity: 156A peak

Efficiency & Protection

• MPPT Efficiency: 99%
• Battery-to-Grid Efficiency: 94%
• Protection: PV reverse polarity, over-voltage, short circuit, AFCI, GFCI

Connectivity & Control

• Wi-Fi App Monitoring for remote access
• Closed-loop communication with EG4 48V batteries
• Rapid Shutdown (RSD) & NEC Compliance

Size & Installation

• Dimensions: 29.5" x 20.5" x 10.4"
• Weight: 115 lbs
• Mounting: Wall-mountable

Take Control of Your Energy Future

Whether you’re upgrading an existing system or building from scratch, the EG4 FlexBOSS18 delivers unbeatable performance and affordability. Shop now and make the switch to reliable, high-efficiency solar power!