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- 13kW AC output with PV, 10kW from battery
- 18kW usable PV input (24kW max), 2 MPPTs
- 90A grid pass-through
- UL 1741 and UL 3141 certified
- Pairs with GridBOSS for whole-home backup
- NEMA 4X outdoor-rated enclosure
- 10-year limited warranty
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The EG4 FlexBOSS18 is a 48V split-phase hybrid inverter that delivers professional-grade performance at a lower price point, which makes it a good fit for installers and DIYers alike. It provides 13kW of continuous output with PV, 18kW of maximum solar input, and 10kW from batteries alone. Use it to reduce grid reliance or to build a capable off-grid system.
Highlights
- Power: 13kW continuous with PV, 18kW solar input, 10kW battery-only
- Compatibility: works with EG4 batteries and pairs directly with the EG4 GridBOSS MID
- Certified: UL 1741
- Value: an affordable entry into hybrid solar with pro-level capability
- Flexible installation for residential and commercial systems
Better with GridBOSS
Pairing the FlexBOSS18 with the GridBOSS MID removes the need for separate breakers and transfer switches, lowers installation cost, and adds time-of-use optimization, load shifting and backup prioritization.
Specifications
| Continuous output (with PV) | 13kW |
| Battery-only output | 10kW |
| Max PV input | 18kW |
| Battery voltage | 48V |
| Output | 120/240V split phase |
| Enclosure | NEMA 4X |
| Certification | UL 1741 |
| Weight | 114.6 lbs |
| Warranty | 10-year EG4 limited product warranty |
The EG4 FlexBOSS LCD Screen Kit is sold separately.
| Manufacturer | EG4 Electronics |
|---|---|
| Model Number | IV-13000-HYB-AW-FX-XX |
| Rated AC Output (on-grid, PV+grid) | 13kW (54A @ 240V) |
| Rated AC Output (battery only) | 10kW |
| Max PV Array | 18kW (STC), 24kW max input |
| Max DC Input Voltage | 600 VDC |
| MPPTs | 2 (120-440 VDC operating) |
| Battery | 51.2 VDC nominal (40-60 VDC), 208A max charge/discharge |
| AC Output | 120/240 or 208 VAC |
| Max Pass-Through From Grid | 90A |
| CEC Efficiency | 97% |
| Enclosure | NEMA 4X |
| Operating Temp | -13 to 140°F (-25 to 60°C) |
| Dimensions (HxWxD) | 30.43 x 22.28 x 11.22 in (773 x 566 x 285 mm) |
| Weight | 115 lb (52 kg) per spec sheet; 114.6 lb per product page |
| Certifications | UL 1741 SA/SB, UL 3141, PCS CRD, CSA C22.2, IEEE 1547 |
| Warranty | 10 years |
Specifications are from the manufacturer and may change. Questions? Call (888) 831-0450.
EG4 10-year limited warranty
| Coverage | 10-year full parts or full product replacement from original purchase date |
|---|---|
| Registration | register within first year of purchase, or keep proof of purchase from an EG4 authorized distributor |
| Transfer | original purchaser; transferable once if unit stays at original installation site |
| Residential vs commercial | no separate terms stated |
| How to claim | contact original place of purchase (Sky Solar USA) / EG4 support |
Download: EG4 FlexBOSS18 Hybrid Inverter Warranty Document
Manufacturer warranties are provided by the manufacturer. Keep your invoice as proof of purchase. Questions about a warranty claim? Call (888) 831-0450.