EG4 FlexBOSS21 Hybrid Inverter | 48V Split Phase | 21kW PV Input - Green Vista Living
EG4 FlexBOSS21 Hybrid Inverter | 48V Split Phase | 21kW PV Input - Green Vista Living
EG4 FlexBOSS21 Hybrid Inverter | 48V Split Phase | 21kW PV Input - Green Vista Living
EG4 FlexBOSS21 Hybrid Inverter | 48V Split Phase | 21kW PV Input - Green Vista Living
EG4 FlexBOSS21 Hybrid Inverter | 48V Split Phase | 21kW PV Input - Green Vista Living
EG4 FlexBOSS21 Hybrid Inverter | 48V Split Phase | 21kW PV Input - Green Vista Living
EG4 FlexBOSS21 Hybrid Inverter | 48V Split Phase | 21kW PV Input - Green Vista Living
EG4 FlexBOSS21 Hybrid Inverter | 48V Split Phase | 21kW PV Input - Green Vista Living
EG4 FlexBOSS21 Hybrid Inverter | 48V Split Phase | 21kW PV Input - Green Vista Living
EG4 FlexBOSS21 Hybrid Inverter | 48V Split Phase | 21kW PV Input - Green Vista Living
EG4 FlexBOSS21 Hybrid Inverter | 48V Split Phase | 21kW PV Input - Green Vista Living
EG4 FlexBOSS21 Hybrid Inverter | 48V Split Phase | 21kW PV Input - Green Vista Living

EG4 FlexBOSS21 16kw AC Hybrid Inverter | 48V Split Phase | 21kW PV Input

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EG4 FlexBOSS21 Hybrid Inverter | 48V Split Phase | 21kW PV Input - Green Vista Living

EG4

EG4 FlexBOSS21 16kw AC Hybrid Inverter | 48V Split Phase | 21kW PV Input

$5,249.00 $3,500.00
EG4 FlexBOSS21 Hybrid Inverter | 48V Split Phase | 21kW PV Input - Green Vista Living
EG4 FlexBOSS21 Hybrid Inverter | 48V Split Phase | 21kW PV Input - Green Vista Living
EG4 FlexBOSS21 Hybrid Inverter | 48V Split Phase | 21kW PV Input - Green Vista Living
EG4 FlexBOSS21 Hybrid Inverter | 48V Split Phase | 21kW PV Input - Green Vista Living
EG4 FlexBOSS21 Hybrid Inverter | 48V Split Phase | 21kW PV Input - Green Vista Living
EG4 FlexBOSS21 Hybrid Inverter | 48V Split Phase | 21kW PV Input - Green Vista Living

EG4

EG4 FlexBOSS21 16kw AC Hybrid Inverter | 48V Split Phase | 21kW PV Input

$5,249.00 $3,500.00
  • Description

EG4 FlexBOSS21 Hybrid Inverter | 48V Split Phase | 21kW PV Input

Versatile and Powerful Hybrid Inverter

The EG4 FlexBOSS21 is a versatile 48V split-phase, hybrid inverter/charger that offers the same dependable power as the 18kPV with enhanced flexibility. Powerful enough to start a 5-ton AC unit, the FlexBOSS21 supports 21kW of PV input. Capable of paralleling up to 10 units together, the FlexBOSS21 has an impressive total output of 160kW. Three MPPTs give users optimal control over their solar needs, while the updated EG4 monitoring software allows for convenient total remote management, complete with mobile notifications and remote setting. Seamless interaction with GridBOSS gives users control over their entire Energy Storage System (ESS).

EG4 FlexBOSS21 Hybrid Inverter Key Features

  • Flexible Power Options: Operate off-grid, with grid support, or sell excess power back to the grid.
  • High PV Input Voltage: Supports up to 600V DC, allowing reduced cable sizes.
  • Smart Connectivity: Remote access with Wi-Fi and closed-loop communication with compatible batteries.
  • Safety-First Design: Includes rapid shutdown, ground fault monitoring, arc-fault protection, and robust safety certifications. 

Specifications

  • Input Voltage Range: 120/240VAC; 120/208VAC (Split-phase)
  • Output Power: 16kW continuous, with a peak surge capacity of 24kW
  • Dimensions: 29.5 x 20.5 x 11.2 inches
  • Weight: 88 lbs 
  • Warranty: 10-year standard warranty, covering all major components 

Why Choose EG4 FlexBOSS21? The FlexBOSS21 combines efficiency, durability, and innovation, making it a top choice for those seeking robust energy solutions. Its advanced monitoring and safety features provide reliable power and peace of mind for residential or commercial installations.

Elevate Your Energy Solutions Today: Explore the potential of the EG4 FlexBOSS21 Hybrid Inverter and enhance your energy management system.

Important Breaker Information for Pairing with the EG4 GridBoss

Each EG4 GridBoss unit includes:

  • 70A Breaker: Compatible only with the EG4 18kPV Hybrid Inverter.
  • Smart Port Breakers: Rated at 30A, 40A, 60A, and 80A. 

Please Note:

  • You must purchase a 90A Breaker separately for use with the EG4 FlexBoss21 Hybrid Inverter, you can easily add this to your cart directly from this page.
  • You must purchase a 50A Breaker separately for use with the EG4 12kPV Hybrid Inverter.
  • A 125A Breaker (sold separately) can be used with either the Smart Port or Gen Port.

Frequently Asked Questions

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Most orders ship out within 1–2 business days and arrive within 3–5 business days depending on your location.
We offer easy returns as long as your item meets the conditions outlined in our Return Policy. Items must be unused, in original packaging, and returned within the specified return window.
Absolutely! Our in-house product experts are here to help. Live chat or call us 513-743-829 for personalized advice before or after your purchase.
Yes. All products include any applicable manufacturer warranties, and we’ll help you handle any warranty claims if needed.
Yes, we only sell 100% authentic, brand-new products, sourced directly from our manufacturers or authorized distributors.

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Feedback From Our Customers

At Green Vista Living, we pride ourselves on delivering top-quality products and exceptional service to solar professionals and homeowners alike. Here's what our customers have to say about their experiences with us.

Kevin Leary
May 18, 2025
★★★★★

Incredible Tech Support from Anees of Green Vista Living. Exceptional service and went above and beyond on every question.

Bryan Cunningham
Off grid Kit • Dec 21, 2025
★★★★★

Shipment was slow due to high demand, but the team kept me informed and ensured everything arrived properly.

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