Machine for preparation of beverages from at least one aromatic substance, including coffee of espresso type and similar, presenting: - a plurality of electrical energy consumers, - at least one internal energy source, - connection means adapted for functional connection of the machine to at least one external energy source, and - an energy management device provided so that it can supervise and regulate the supply and distribution of electricity to at least some of said electrical energy consumers, - said electrical energy consumers are provided so that they can only use electrical energy at low voltage, including from said at least one internal energy source or from said at least one external energy source or from both these types of energy source (3, 4) simultaneously, whereby said energy management device is further provided so that it can identify the availability of energy in said internal energy source and/or in said external energy source and determine which energy source (3, 4) to use at least as a function of the availability of energy in said internal and/or in said external energy source, - said external energy source includes a power distribution grid with a voltage above 50 V and up to 230 V, and an energy generation and/or storage device provided so that it can be operationally connected to the machine, characterized in that said electrical energy consumers are provided so that they can only use electrical energy at a value of voltage between 24 V and 36 V of direct current, said energy storage means are provided with a maximum nominal storage capacity of 120 Wh, preferentially of 80 Wh and a discharge capacity of at least 5 C, preferentially at least 10 C, whereby the machine further presents a voltage transformation device for connection to an external energy source presenting a greater value of nominal voltage, whereby said voltage transformation device is provided externally to the chassis of machine, preferentially in a respective chassis, and with means for connecting to the machine, including by means of wires or wirelessly, and whereby said voltage transformation device is a large entry interval voltage device. - a plurality of electrical energy consumers, - at least one internal energy source, - connection means adapted for functional connection of the machine to at least one external energy source, and - an energy management device provided so that it can supervise and regulate the supply and distribution of electricity to at least some of said electrical energy consumers, - said electrical energy consumers are provided so that they can only use electrical energy at low voltage, including from said at least one internal energy source or from said at least one external energy source or from both these types of energy source (3, 4) simultaneously, whereby said energy management device is further provided so that it can identify the availability of energy in said internal energy source and/or in said external energy source and determine which energy source (3, 4) to use at least as a function of the availability of energy in said internal and/or in said external energy source, - said external energy source includes a power distribution grid with a voltage above 50 V and up to 230 V, and an energy generation and/or storage device provided so that it can be operationally connected to the machine,