Comparing EG4 Inverters for Grid Tying: FlexBOSS18 vs 18kPV-12LV

I'm looking into two EG4 inverters: the FlexBOSS18 and the 18kPV-12LV All-In-One Hybrid Inverter. I can't find significant differences between them other than their maximum power handling. I currently have an off-grid setup with a 6480W panel, a 30kWh battery, and a 5000W inverter. I'm interested in grid-tying my system because I generate excess energy in the spring and fall and want to feed some of that back to the grid to reduce my energy costs. I also want to know if Victron offers a hybrid inverter that can do this, as their product page doesn't mention grid feeding.