The EG4 FlexBOSS21 + 280Ah WallMount Indoor ESS is No positioning statement available.

Key Features

Reliable Power

Maintains critical loads during outages, supporting essential systems.

High Capacity

Powers demanding appliances with up to 16kW output.

Versatile Design

Supports on-grid and off-grid applications for maximum flexibility.

Simple Setup

Plug-and-play installation saves time and effort.

Scalable Solution

Add units to match your energy needs.

Remote Monitoring

Stay informed with real-time performance tracking.

Certified Safety

ETL listed to UL 9540 for trusted operation.

Complete ESS Solution

Battery + inverter system designed to work seamlessly together.

21,000W PV Input / 12kW Output

High-capacity power for residential and commercial systems.

3 MPPT Inputs

Maximizes solar production across multiple arrays.

14.3kWh LiFePO₄ Battery

Safe, UL-certified indoor energy storage.

8,000+ Cycle Life

Long-lasting performance at 80% DoD.

Advanced BMS & Safety Features

Includes real-time monitoring, self-heating, and E-Stop.

GridBOSS Integration

Advanced load management, AC coupling, and generator support.

Closed-Loop Communication

Seamless coordination between battery and inverter.

All-in-One Hybrid Power System

Streamlined design integrates inverter, charger, and controller for simplified setup and seamless energy conversion between solar, grid, and batteries.

21kW Solar Input Capacity

Connect up to 21,000W of PV solar, maximizing renewable energy generation for high-demand applications.

Flexible Battery Options

Choose between EG4 WallMount Indoor Batteries or EG4 PowerPro All-Weather Batteries, each rated 48V 280Ah (14.3kWh) and built with LiFePO₄ chemistry for over 6,000 charge cycles.

Technical Specifications