FlexBOSS18 13kW AC Hybrid Inverter
One box that runs solar, a battery bank, and the grid. 13kW continuous with solar behind it, 18kW of PV input, and 10kW on battery alone when the grid is down. Pair it with the EG4 GridBOSS and whole-home backup drops in without a wall of extra breakers.
In stock and ready to ship.
- AC output
- 13 kW
- Max DC input
- 18000 W
- MPPT channels
- 2
- Max MPPT voltage
- 550 V
- MPPT current
- 26 A
- MPPTs
- 2
One box. Solar, battery, and grid.
The EG4 FlexBOSS18 is a 48V split-phase hybrid inverter that runs solar, a battery bank, and the grid through a single unit. It puts out 13kW continuous with solar behind it, takes up to 18kW of PV in, and still delivers 10kW on battery alone when the grid goes down. It is professional-grade hardware at a price that works for installers and DIY builds alike.
13kW hybrid output
13kW continuous with PV behind it, and 10kW straight off the battery when the grid is out.
18kW of solar input
Room for a big array across two MPPT trackers, so the system keeps producing as the sun moves and shade shifts.
Pairs with GridBOSS
Add the EG4 GridBOSS MID and a whole-home backup system comes together without a stack of extra transfer switches and breakers.
Time-of-use ready
Shift loads, prioritize backup, and charge when power is cheap. You decide how and when the energy gets spent.
UL1741 certified
Meets the safety standard utilities and inspectors look for, whether the system is grid-tied or off-grid.
Parallel to 10 units
Start with one and stack up to ten as the loads grow. The system scales with the house, not the other way around.
The FlexBOSS18 is the inverter we reach for on most whole-home backup and net-metered jobs. It also handles grid-tied systems with battery storage and off-grid builds that want room to grow. If you need more output per unit, look at the FlexBOSS21.
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