An apparatus for the conversion and management of power comprising: input terminals coupled to an input DC voltage; an inverter module comprising a first DC-DC conversion stage , connected in input to said input terminals , a second DC-AC conversion stage having the input coupled to the output of said first DC-DC conversion stage and the output connected to the power grid , a battery-charger module associated in input to the output of the first DC-DC conversion stage and to the input of said second DC-AC 12 conversion stage, and a control module adapted to adjust the operation of said inverter module ; a battery module coupled to the output of said battery-charger module , said battery module being adapted to store power from said first DC-DC conversion stage , during recharge, and to supply power to said second DC-AC conversion stage during discharge; at least one house load associated to the output of said second stage and to the grid ; power meter means adapted to measure the power in input and in output to/from said inverter module and the power absorbed by or supplied to the grid ; a switching module associated to said at least one house load and adapted to control the switching on and off of said at least one house load ; characterized in that said control module is further associated to said power meter means and to said switching module and is adapted to adjust the operation of said inverter module and of said switching module in order to keep the power (P4) exchanged with the grid below a threshold set by the user by varying the amount of power (P5) exchanged with said group of batteries and the amount of power (P3) absorbed by said at least one house load . input terminals coupled to an input DC voltage; an inverter module comprising a first DC-DC conversion stage , connected in input to said input terminals , a second DC-AC conversion stage having the input coupled to the output of said first DC-DC conversion stage and the output connected to the power grid , a battery-charger module associated in input to the output of the first DC-DC conversion stage and to the input of said second DC-AC 12 conversion stage, and a control module adapted to adjust the operation of said inverter module ; a battery module coupled to the output of said battery-charger module , said battery module being adapted to store power from said first DC-DC conversion stage , during recharge, and to supply power to said second DC-AC conversion stage during discharge; at least one house load associated to the output of said second stage and to the grid ; power meter means adapted to measure the power in input and in output to/from said inverter module and the power absorbed by or supplied to the grid ; a switching module associated to said at least one house load and adapted to control the switching on and off of said at least one house load ; characterized in that said control module is further associated to said power meter means and to said switching module and is adapted to adjust the operation of said inverter module and of said switching module in order to keep the power (P4) exchanged with the grid below a threshold set by the user by varying the amount of power (P5) exchanged with said group of batteries and the amount of power (P3) absorbed by said at least one house load . <EOS>