EG4 FlexBOSS21 16kw AC Hybrid
$4,500.00 Original price was: $4,500.00.$4,160.00Current price is: $4,160.00.
- Rated Output Power:
- 16kW of continuous output power/12kW continuous output by using battery alone
- Max PV Input:
- 21kw
- Paralleling:
- Parallel up to 10 units for 160 kw of output power
- Number of MPPTs:
- 3

EG4 FlexBOSS21 (V1.1) Hybrid Solar Inverter.
The EG4 FlexBOSS21 (V1.1) is a 48V split-phase hybrid solar inverter/charger that works just as well as the 18kPV. FlexBOSS21 can take in 21kW of PV power and turn on a 5-ton air conditioner. When using PV input, the FlexBOSS21 can output an amazing 256kW continuously. You can connect up to 16 units in parallel.
The three MPPTs on this hybrid solar inverter give users the most control over their solar needs. The new EG4 monitoring software also makes it easy to manage everything from a distance with mobile notifications and remote settings. GridBOSS makes it easy for users to control their Energy Storage System (ESS).
Key Features of the hybrid solar inverter:
- 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.
- UL 1741 Certificate of Compliance
- CEC Solar Equipment Listing
Specifications:
- Input Voltage Range: 120/240VAC; 120/208VAC (Split-phase)
- Output Power: 16kW continuous when using PV input, 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 EG4 GridBoss Breaker Information
Each EG4 GridBoss (V2.1) unit includes:
- 90A Breaker:
Compatible only with the EG4 FlexBOSS21 - Smart Port Breakers:
Rated at 30A, 40A, 60A, and 80A.
Please Note:
- You must purchase a 70A Breaker separately for use with the EG4 18kPV Hybrid Inverter.
- 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.
hybrid solar inverter
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