The invention discloses an inverter comprising a shell, a transmitter, a latch, a socket board, a circuit board, a heat radiator, a charging device, a capacitor and a main inverter body. The shell has a cuboid structure; and the surfaces of the shell at the two sides are equal and are parallel to each other. The lateral square surface of the shell and the lateral square surface of the socket board are connected movably in an interference fit manner to form a convex shape. The height of the shell is 7 cm. The main inverter body has a cuboid structure; the surfaces of the main inverter body at the two sides are equal and are parallel to each other; and the bottom surface of the main inverter body is arranged in the center of the top of the circuit board to form a convex shape. The height of the main inverter body is 4cm to 4.5cm. With the latch, a button is pressed to drive a spring to be compressed; a plugging board extends out of the inside of a base plate through a locking plate, so that the plugging board and the base plate are separated, so that the main inverter body is easy to repair after the shell is opened and thus the usage efficiency is improved.