Module for storing / drawing electricity in / from an electric accumulator, applicable to photovoltaic systems, photovoltaic system

摘要

An upgrade module for storing / drawing electricity into / from an electrical accumulator (402, 502), said module having first terminals and second terminals, said first terminals being formed with a photovoltaic panel (401, 501) and a power grid inverter ( 404, 504) of the type connected to MPPT, and the second terminals are adapted to be connected to the electrical accumulator (402, 502), the module having a conversion unit (403, 503) formed between the first Terminals and the second terminals, the unit (403, 503) in turn having a two-way DC / DC converter (450, 550), which is designed to convert a generated by the photovoltaic panel (401, 501) first energy stream to store it in the accumulator (502) and a second energy stream taken from the accumulator (502) to deliver it to the inverter (404, 504), the two-way DC / DC converter (450, 550) is configured to convert the first energy stream and the second energy stream in a selective manner, characterized in that it comprises: - a power detector device (407, 507), which is formed between a user device ( 420, 520) having the inverter (404, 504), in particular of the type with MPPT, and the user (406, 506), and a public power grid (408, 508) to be connected, and is adapted to detect the Power flowing between the user equipment (420, 520) and the public power grid (408, 508) and vice versa between the public power grid (408, 508) and the user equipment (420, 520); wherein the conversion unit (403, 503) comprises a control unit (511) connected to the power detector means (407, 507) and adapted to control the two-way DC / DC converter (450, 550) as a function of Power detector means (407, 507) generated signals.