System for processing material to generate syngas in a modular architecture may include a plurality of primary reactor chambers and a shared secondary reactor chamber. Each primary reactor chamber includes electrodes protruding into the chamber, the electrodes operable to generate an arc capable to generate first-stage gas from breakdown of the material when electricity is applied to the electrodes. The secondary reactor chamber is operable to receive the first-stage gas generated by the plurality of primary reactor chambers and to receive water vapor. The gas generated within the plurality of primary reactor chambers combine and interact with the water vapor to form second-stage gas. Turbulence can be generated within the secondary reactor chamber to improve mixing of the first-stage gas with the water vapor. Powering of each of the primary reactor chambers can be done with a different phase of power from a multi-phase input to ensure balanced power utilization.