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EG4 FlexBOSS21 & EG4 WallMount Battery Bundle

EG4 FlexBOSS21 & EG4 WallMount Battery Bundle
Save 10% Save 12%
$8,047.98
$8,047.98 - $32,481.83
$8,047.98
$7,101.88
$7,101.88 - $29,081.63
$7,101.88
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Inverter Option: 1 EG4 FlexBOSS21 + 1 x EG4-314Ah Indoor WallMount Battery
EG4 FlexBoss21 Manual & Spec Sheet

View Manual HERE
View Spec Sheet HERE

WallMount Indoor Lithium Battery Guides

View Quick Start Guide HERE
View Spec Sheet HERE

View Connection Overview & Paralleling Guide HERE

View Device Monitoring & Settings Guide HERE

EG4 FlexBOSS + Indoor WallMount Battery Bundle

The EG4 FlexBOSS21 + WallMount Indoor Battery Bundle delivers a powerful, all-in-one solution for whole-home energy independence, backup, and savings. Designed to seamlessly integrate solar, battery, and grid power, this system gives you reliable control over your energy—keeping your home running smoothly during outages while maximizing everyday efficiency.

Ideal for homeowners and small businesses looking for a dependable, scalable energy solution. Perfect for whole-home backup, off-grid living, or reducing reliance on the grid through solar self-consumption and time-of-use savings—all while maintaining seamless, uninterrupted power.

EG4 FlexBOSS21 LCD Screen Kit sold separately.

  • Whole-Home Backup Confidence: Keep essential systems—and even large loads like a 5-ton AC—running without interruption during outages.
  • High Solar Input for Maximum Production: Supports up to 21kW of PV input with three MPPTs, helping you capture more energy throughout the day.
  • Flexible Energy Control: Operate off-grid, use grid support, or sell excess energy back—giving you full control over how you power your home.
  • Smart Monitoring & Remote Access: Manage your system from anywhere with EG4 monitoring software, including real-time data and mobile alerts.
  • Safe, Certified, and Built to Last: Advanced protections including rapid shutdown, arc fault detection, and a robust BMS for long-term reliability.

EG4 FlexBOSS21 Inverter Specs

  • PV Input: Up to 21kW
  • Max PV Voltage: 600V DC
  • Output: Split-phase 120/240V
  • Certifications: UL 1741, CEC Listed

EG4 314Ah Indoor Wallmount Specs

  • Nominal Voltage: 51.2V
  • Capacity: 314Ah
  • Energy: 16 kWh
  • Max Continuous Output: 200A
  • Peak Output: 12.8 kW

Includes: 1-2x EG4 FlexBOSS21 Hybrid Inverter, 1-6x EG4 314 AhBuildable Conduit Box, 0-6x EG4 280Ah/314Ah WallMount Battery Paralleling Cable Kit (1 battery option does not include any), 1-6x EG4 314Ah Indoor WallMount Battery


Your Satisfaction with EG4 is Guaranteed:

  • 10-Year Limited Warranty
  • Lowest Price Guarantee