What is a defining feature of an AC coupled system?

An AC coupled system is characterized by its use of both grid-tied inverters and battery inverters that operate with alternating current (AC). This setup allows for the integration of energy production from solar panels and the capability to store excess energy in batteries. The grid-tied inverter converts the direct current (DC) produced by the solar panels into AC, which is used in households and can also be fed back into the utility grid. The battery inverter, on the other hand, connects to the battery storage and is responsible for converting stored DC back into AC when needed.

This dual inverter system is advantageous because it enhances flexibility in energy management. For instance, when solar production exceeds consumption, the surplus energy can be stored in batteries. When there is inadequate solar generation, converted energy from the batteries can be utilized. Additionally, since it is designed to be compatible with grid connections, it allows for seamless energy production alongside utility use, providing backup power in case of outages.

Understanding this feature is critical for designing efficient solar power systems, especially for users who want both storage capabilities and the potential benefits of grid interaction.