The total energy of the silicon nanowire is getting attention recently, due to the wire application battery. Thus, this study presents the silicon nanowire total energy based on local density approximation the results that showed silicon nanowires have better energy with standing. These properties can contribute to the reliability and design of novel silicon nanodevices especially in battery industry. Electronic properties of SiNWs were studied based on First principal method via DFT. Abinit code were used for calculation as implemented in Linux. The total energy at (001), (110) and (111) with different sizes were calculated. The total energy for (001), (110) and (111) SiNWs are -1.33, -1.35 and -1.37 respectively. SiNWs in the direction of {111} has the lowest total energy.
