Catalysis of the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: Na+(out) + inorganic phosphate(out) = Na+(in) + inorganic phosphate(in).
Catalysis of the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: Na+(out) + inorganic phosphate(out) = Na+(in) + inorganic phosphate(in). (en)