During the year ended December 31, 2018, the Company entered into purchase commitments to acquire second generation charging stations with an aggregate value of $3,156,629. The Company has an aggregate deposit of $425,620 for these charging stations, which is included within other assets on the Company’s condensed consolidated balance sheet as of March 31, 2019. As of March 31, 2019, the Company had a remaining purchase commitment of $1,229,163, which will come due upon delivery of the charging stations.