EG4® FlexBOSS21 Inverter

The EG4^® FlexBOSS21 is a split phase, all-in-one, hybrid inverter designed for the residential and small commercial markets. With a 21kW usable PV (DC) input, the FlexBOSS21 provides high power output, generating 12kW of AC power during non-sunlight conditions and a full 16kW AC with solar PV gain. It is a powerful and versatile inverter which can feed-through 90 Amps of utility power from the grid at 120/240 VAC. The FlexBOSS21 is also EMP-hardened, ensuring reliable performance during Electromagnetic Pulse (EMP) events. Built for versatility, the FlexBOSS21 seamlessly integrates with Briggs & Stratton® SimpliPHI^® 6.6 Battery System, including optimal pairing with EG4 GridBOSS system.

To learn more, download the spec sheet and user manual.

Click and drag image to rotate.

To learn more, download the spec sheet and user manual.

Click and drag image to rotate.

Features

Industry-Leading Capacity

Highest PV input on the market.

Flexible Scalability

Expands easily from small to large systems, 50-160 Amps (equivalent to full 200A service).

Affordable Solution

Cost-effective for any system size.

Compact Design

Small footprint for the power and flexibility offered.

Enhanced Power Output

Delivers superior performance, providing more power for higher energy demands.

Complete System Compatibility

Easily integrates with Briggs & Stratton 6.6 Battery System and pairs perfectly with GridBOSS systems for a seamless solar energy solution.

EMP-Hardened

Ensures reliable operation during Electromagnetic Pulse (EMP) events.

Specifications

Model Number

FlexBOSS21

Battery Input Voltage

48V

Rapid Shutdown Capable

YES

Maximum Paired Solar (DC Input)

24000W

Integrated MPPT Charge Controllers

Maximum Continuous Power

12000W Battery Only / 16000W PV+Bat

Instantaneous Power (100ms)

24000W

Surge Power (5s)

15000W

CEC Weighted Efficiency

96.90%

Parallel Stacking

Warranty Period

10 years

Battery Compatibility

Briggs & Stratton® SimpliPHI® 6.6

Certifications

UL1741, SA, SB, PCS CRD California Rule 21 Phase I, II, III CSA 22.2.107.1:2016 Ed. 4 CSA 22.2.330:2017 Ed. 1 IEEE 1547.1:2020; IEEE 1547:2018 Hawaii Rule 14H [HECO SRD IEEE 1547.1-2020 Ed.2]

Dimensions (W x H x D)

30.43 × 22.28 × 11.22 in. (773 × 566 × 285 mm)

Weight

121 lbs. (55 kg)

_{¹See operator’s manual or energy.briggsandstratton.com for complete warranty details.
All specifications listed are typical/nominal and subject to change without notice.
EG4 is a registered trademark of EG4 Electronics.}