The 1AC Transformer consists of a power transformer enclosed in a module. Both the primary and secondary sides of the 1AC Transformer are made of two identical separate windings. Banana jacks on the module front panel provide access to each winding, allowing connection in a variety of configurations. The 1AC Transformer has a turns ratio of 1:5, when considering the totality of its primary and secondary windings. The 1AC Transformer windings are polarized and the polarity of each winding is indicated by a small dot on the module front panel. A thermistor output allows monitoring of transformer temperature to prevent overheating. A typical application of the 1AC Transformer is to convert the energy stored in batteries to a suitable voltage level (for example, to the level of the ac power network voltage).