The BLUETTI AC300 + B300 is a 100% modular expandable power station combo that delivers 3,000W of pure sine wave power (6,000W surge) paired with a 3,072Wh LiFePO4 battery capacity. Because the AC300 main unit contains the inverter but no internal battery, it must be linked directly to at least one B300 expansion battery to function. It serves as a premium, quiet, and eco-friendly home backup solution or a heavy-duty power supply for off-grid RV living