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.
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 SimpliPHI 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
| FlexBOSS21 | |
| Battery Input Voltage | 48V |
| Rapid Shutdown Capable | YES |
| Maximum Paired Solar (DC Input) | 24000W |
| Integrated MPPT Charge Controllers | 3 |
| Maximum Continuous Power | 12000W Battery Only / 16000W PV+Bat |
| Instantaneous Power (100ms) | 24000W |
| Surge Power (5s) | 15000W |
| CEC Weighted Efficiency | 96.90% |
| Parallel Stacking | 10 |
| Weight | 121 lbs. (55 kg) |
| Dimensions (W x H x D) | 30.43 × 22.28 × 11.22 in. (773 × 566 × 285 mm) |
| 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] |
1 See 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.