To automatically output a prescribed AC voltage corresponding to an input DC voltage, while a manual changeover of a switch by a user is not required.

This inverter has an input means 1, to which a DC voltage having a certain voltage value within a prescribed range, is inputted, a step-up means 4 which steps up the inputted DC voltage, so as to have a prescribed voltage value, and a conversion means 8 which converts the stepped up DC voltage into an AC voltage.