Bidirectional inverters are a type of inverter technology that can convert direct current (DC) electricity into alternating current (AC) electricity, and vice versa. They are often used in portable energy storage systems, such as portable power stations or electric vehicles, to allow for the flow of electricity in both directions.

In a portable energy storage system, a bidirectional inverter can be used to:

1. Convert AC electricity from the grid or a generator into DC electricity, which can be stored in the system's battery.

2. Convert DC electricity from the battery into AC electricity, which can be used to power electronic devices or appliances.

3. Allow for the flow of electricity between the battery and the grid or a generator in both directions, allowing the battery to be charged or discharged as needed.

Overall, bidirectional inverter technology is an important component of portable energy storage systems, as it allows for the flow of electricity in both directions and enables the system to be charged and discharged as needed.