EG4-FLEXBOSS21-LCD

EG4 FlexBOSS LCD Screen Kit 

Product Summary – EG4 FlexBOSS21 (with LCD Display Option)

The EG4 FlexBOSS21 is a high-performance hybrid solar inverter designed for residential and small commercial energy storage systems. It serves as the central power conversion and management device within an EG4 solar + storage solution, combining robust AC output capability, extensive PV input capacity, and advanced system control features.

Paired with an optional LCD screen accessory like the EG4 FlexBOSS LCD Display Kit, users gain direct, on-unit visualization of real-time system status, performance metrics, and operational data at a glance. This combination enhances user interaction and simplifies system monitoring without requiring external apps or tools.

Key Features – EG4 FlexBOSS21

All-In-One Hybrid Inverter
The FlexBOSS21 integrates solar PV, battery energy storage, and grid connectivity into a single hybrid inverter platform capable of operating in grid-tied, off-grid, and backup power scenarios.

High Power & Solar Capacity

• Up to 21 kW usable PV DC input (24 kW max) supporting larger arrays and multi-orientation designs.

• Produces up to 16 kW AC output with PV assistance and 12 kW AC output from battery only conditions.

• Nominal split-phase output: 120/240 VAC with 50 A continuous output.

Multiple MPPT Solar Inputs
Three built-in Maximum Power Point Tracking (MPPT) charge controllers (configured as ~26 A / 26 A / 15 A) allow flexible string configurations and optimized energy harvest from up to five PV strings.

Flexible System Integration
Designed to work seamlessly with battery storage systems (lithium or lead acid), supports parallel stacking of multiple inverters for large system scalability, and integrates easily with EG4’s GridBOSS power gateway for enhanced whole-home backup, smart load management, and generator support.

Smart Monitoring & Control
Includes communications interfaces such as RS485, CAN, and Wi-Fi for remote monitoring, configuration, and performance insights via compatible applications or system interfaces.

Durable Build & Certification
Compact, NEMA 4X-rated enclosure supports a wide operating temperature range, outdoor mounting, and safety certifications including UL1741, IEEE 1547 series, and NEC compliant rapid shutdown capability.

Optional LCD Screen (Display Accessory)

An optional LCD display such as those provided by the EG4 FlexBOSS LCD Screen Kits allows installers and system owners to:

• View real-time inverter output and PV input data directly on the unit

• Monitor battery state, charge/discharge levels, and fault notifications

• Navigate menu settings locally without additional devices

These kits are offered at different price points and sourced from compatible manufacturers to fit the FlexBOSS21’s display interface.