The invention concerns an energy system, comprising a first energy converting plant (10) located at a first geographical position and a second energy converting plant (20) located at a second geographical position, wherein the first energy converting (10) plant is configured to produce at least one energy carrying compound from at least one energy depleted compound using energy obtained from a non-fossil energy source, wherein the second energy converting plant (20) is configured to produce power, electricity and/or heat by reacting the at least one energy carrying compound such as to form the at least one energy depleted compound, and wherein said energy system further comprises a transporting system (30) configured to transport the at least one energy carrying compound produced in the first energy converting plant (10) to the second energy converting plant (20) and to transport the at least one energy depleted compound produced in the second energy converting plant (20) to the first energy converting plant (10). The energy system forms a closed loop with regard to the energy carrying and energy depleted compounds produced at the first and second energy converting plants (10, 20), wherein the at least one energy carrying compound produced in the first plant (10) is transported in the closed loop to the second plant (20) as to form a reactant at that plant, and wherein the at least one energy depleted compound produced in the second plant (20) is transported in the closed loop to the first plant (10) as to form a reactant at that plant. Energy conversion plants can also be set up in a network with transportation of energy carrying and energy depleted compounds in-between forming a Sanner cycle network.