This study presents performance evaluation of 3KVA 24/220V 50Hz single Phase inverter. The two 12 Volts 200AH batteries were connected in series to produce 24V, 400AH which is fed into the input terminals of the inverter connecting resistive and inductive loads in the output terminals to determine different measured. It was observed that when the inverter system was working on No-load, the battery voltage kept decreasing, which is an indication that for optimum performance the battery must be charged continuously irrespective of whether load is connected or not. It was observed that as resistive load increases, the terminal voltage of the battery decreases, while the current drawn increases, as the terminal voltage of the battery decrease. It was observed that the higher the load, the more the current drawn, hence the extent of continuity of supply depends on the ampere-hour rating of the battery and the amount of current drawn by the load. Also the resistive load consumes less energy compared with inductive load. Therefore, for highly inductive loads such as electric motors and transformers, there is need for higher capacity inverters for smooth operations. The output waveform analyzed using the Hantek DSO5202B, shows that the inverter that was analyzed has pure sine wave. The prototype design took care of the various lapses in previous designs which included the final output (pure sine wave), cut off voltage to save battery life and very reduced cost of the final product as products were assembled locally.