The DC-DC Series of the INGECON® SUN STORAGE Power family is a bi-directional DC-to-DC converter designed to operate in combination with DC-to-AC solar PV inverters. Thus, it is intended to create DC-coupled solar-plus-storage systems. Besides, it features the same technology as Ingeteam’s PV inverters, facilitating the supply of spare parts.
Advantages of DC-coupling
The main advantage of a DC-coupled system is that the regulatory requirements are lower than the ones needed for an AC-coupled solar-plus-storage system, as there is no need to prepare an interconnection study. Thus, the administrative procedure and its costs are lower too.
Clipping Recapture. The overall system revenues could be maximized by recapturing the excess of solar energy due to the oversizing ratio between the installed DC power and the AC output power of every PV power plant.
Low voltage generation. Thanks to the battery voltage range, a DC-coupled solar-plus-storage system enables an earlier converter starting point, as the minimum voltage threshold for this equipment is lower. As a result, the solar generation can be maximized by
capturing this energy at low voltages.