NOVELTY - The assembly for producing a synthetic hydrocarbon from an inflow of carbon monoxide and carbon dioxide, comprises an electrolyzer (9) for producing a first flow of hydrogen, a first conversion unit (11) for producing an intermediate flow of carbon monoxide from a part of the inflow of carbon dioxide and hydrogen, a reactor for synthesizing the hydrocarbon, a second conversion unit for producing a second flow of hydrogen from carbon monoxide and water, and a guide assembly for selectively distributing the inflow of carbon monoxide between the second conversion unit and the reactor.    USE - The assembly is useful in an installation for producing a synthetic hydrocarbon from an inflow of carbon monoxide and carbon dioxide (claimed) for generating electricity.    ADVANTAGE - The assembly is capable of easily and economically producing a synthetic hydrocarbon from an inflow of carbon monoxide and carbon dioxide with less consumption of energy.    DETAILED DESCRIPTION - The assembly for producing a synthetic hydrocarbon from an inflow of carbon monoxide and carbon dioxide, comprises an electrolyzer (9) for producing a first flow of hydrogen, a first conversion unit (11) for producing an intermediate flow of carbon monoxide from a part of the inflow of carbon dioxide and hydrogen, a reactor for synthesizing the hydrocarbon, a second conversion unit for producing a second flow of hydrogen from carbon monoxide and water, a guide assembly for selectively distributing the inflow of carbon monoxide between the second conversion unit and the synthesis reactor and for selectively distributing the first hydrogen flow between the first conversion unit and the synthesis reactor, and a unit for controlling the guide assembly. The second hydrogen flow is directed toward the synthesis reactor. The first conversion unit is a reverse water gas shift unit, and the second conversion unit is a water gas shift unit. The first and second conversion units are same or different reversible units, and comprise a conversion reactor and a set of controlled blades for selectively functioning the reactor. The electrolyzer is supplied with electricity from an electrical distribution network. The control unit is provided for evaluating electric power obtainable on the distribution network, and driving the overall orientation in function of the electric power between first and second states. In the first state, corresponding to a situation where the electrical power is relatively higher, the overall orientation directs a portion of the first hydrogen stream to the first conversion unit and directs all incoming carbon monoxide streams to the synthesis reactor. In the second state, corresponding to a situation where the available electrical power is relatively lower, the overall orientation directs the entire first flow of hydrogen to the synthesis reactor and directs a portion of the incoming stream of carbon monoxide to the second conversion unit inflow of carbon dioxide to the first conversion unit in the first state and directing most of the incoming stream of carbon dioxide to the storage unit and/or rejection in the second state. INDEPENDENT CLAIMS are included for:    (1) an installation for production of synthetic hydrocarbons from carbonaceous material; and    (2) a process for production of synthetic hydrocarbons from carbonaceous material.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of an installation for producing synthetic hydrocarbon (Drawing includes non-English language text).    Carbonaceous material (3)    Gasification unit (5)    Gas conditioning unit (7)    Electrolyzer (9)    First conversion unit. (11)