Recently, nine-switch inverter was presented as dual output inverter. Two constant frequency (CF) and different frequency (DF) modes are defined for nine-switch inverter. However CF mode is more interesting because reasonable rating. Several switching methods have been presented for nine switch converter. As a space vector modulation for DF mode has already been proposed by authors. This paper proposes a full space vector modulation (SVM) for both CF and DF modes. Also practical methods are presented for SVM proposed. In addition a special SVM is proposed that offers minimum total harmonic distortion (THD) in DF mode. The performance of the proposed SVM is verified by simulation results.