NOVELTY - An apparatus (100) has top manifold having inlet(s), bottom manifold having outlet(s), casing for connecting top and bottom manifold to define an internal space, and electrode set(s) arranged in the internal space. The electrode set(s) comprises silver chloride cathode (104) and silver anode (102), in fluid communication with fluid containers comprising aqueous solution containing sodium chloride, membrane (108) configured to allow sodium and chloride ions to pass, and connector for electrically connecting cathode to the anode to form an electrical circuit.    USE - Apparatus used for generating electrical power and producing desalinated water (claimed). Uses include but are not limited to batteries, electronic devices, vehicle, mobile phones, power-generating solar panels, power generating windmills, and power generating watermills.    ADVANTAGE - The apparatus yields desired volume of desalinated salt water and power, particularly provides low concentration of salt water.    DETAILED DESCRIPTION - An apparatus has top manifold having at least one inlet, bottom manifold having at least one outlet, casing for connecting the top and the bottom manifold to define an internal space, and at least one electrode set arranged in the internal space. At least one electrode set comprises silver chloride cathode in fluid communication with fluid container (C1) comprising aqueous solution (S1) containing sodium chloride, silver anode in fluid communication with container (C2) comprising solution (S2) containing sodium chloride, membrane arranged between the fluid containers (C1) and (C2) and configured to allow sodium and chloride ions to pass, and connector for electrically connecting the cathode to the anode to form an electrical circuit. An INDEPENDENT CLAIM is included for generation of electrical power and production of desalination water, which involves connecting cathode containing silver chloride to anode containing silver, exposing cathode to a flow of solution (S1) and exposing anode to a flow of solution (S2), to provide concentration differential of at least 1 order of magnitude, and controlling the sodium chloride concentration of the solution (S1) automatically to maintain the concentration differential. The solution (S1) has sodium chloride concentration 1-4 orders of magnitude lower than solution (S2). The sodium chloride concentration of solution (S2) after contacting the anode is lower than the sodium chloride concentration of the solution (S1) before contacting the anode.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a system for producing electrical energy and treating water.    Apparatus (100)    Anode (102)    Cathode (104)    Wires (106)    Membrane (108)