An idea is presented for the photorefractive spatial soliton,namely,screening-photovoltaic solitons pairs in a biased series two-photon photovoltaic photorefractive crystal circuit consisting of two photorefractive crystals connected electronically by electrode leads in a chain with a voltage source.A set of two coupled equations is derived under appropriate conditions for two-beam propagation in the crystal circuit.The existence of dark-dark,bright-dark and bright-bright two-photon screening-photovoltaic soliton pairs in such a circuit is proved.Studies on the interaction between two solitons in one soliton pair show that only the dark soliton can affect the other by light-induced current,whereas the bright one cannot.The asymmetry result comes from the limit in which the spatial extent of the optical beam is much less than the width of the crystal.