1.Easy Install OSN All-In-One design install battery module and inverter into. 2.DC & AC Coupling OSN All-in-One supports simultaneous DC and AC coupling. 3. Next Generation Efficiency 3X Better! Only 4% losses vs. 14% in today’s battery based systems. It boosts PV energy 10-20% without increasing PV array size and reduces storage inverter costs up to 30%. It improves battery efficiency by 10-15%; Partial Charge Carbon AGM’s round trip efficiency is 98% vs. wet cell 80% 4. Grid-Tied, Hybrid, Off-Grid Manages power from Solar, Battery, Grid, Load, and Generator simultaneously 5.Flexible Expandable from 8kwh to 104kwh and 1-13 battery modules. 6.10-Year Standard Warranty