NOVELTY - A soluble anode comprises an electron donor comprising an electron donor metal provided in a solvent; and an electron acceptor provided in the solvent. The electron donor metal is an alkali metal, an alkali earth metal, a lanthanide metal, or their alloy. The electron acceptor is a polycyclic aromatic hydrocarbon or an organo radical. At least a portion of the electron donor comprising an electron donor metal is dissolved in the solvent to generate electron donor metal ions and solvated electrons in the solvent.    USE - Soluble anode used for electrochemical generator including an electrochemical cell (preferably primary cell or secondary cell), a flow cell, or a fuel cell (claimed).    ADVANTAGE - The soluble anode is highly versatile and compatible with a wide range of solid state and liquid cathode and electrolyte systems, and is capable of effective replenishing and/or regeneration, and thus enables an innovative class of electrochemical systems capable of efficient recharging and/or electrochemical cycling. It provides electrochemical generators combining high energy density and enhanced safety. Further, the solvated electron solution is capable of participating in oxidation and reduction reactions useful for the storage and generation of electrical current.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) an electrochemical generator comprising a negative soluble anode (10); a cathode (20) comprising an active positive electrode material; and a separator provided between the anode and the cathode, where the separator is non-liquid and conducts the electron donor metal ions as a charge carrier in the electrochemical generator;    (2) discharging an electrochemical generator; and    (3) charging an electrochemical generator.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a regenerative flow cell.    Negative soluble anode (10)    Negative pole (11)    Cathode (20)    Positive pole (21)    Cathode reservoir (24)