The HB-C square wave inverters have recently been redesigned and modified in general terms to suit most basic appliances especially in the area of frequency stabilization. Before now they are best utilized for resistive loads operation, but can now be used more conveniently with inductive loads. However, their efficiency can get as much as 90% when used with resistive loads only but would drop drastically on the application of inductive loads. With the edges of the square wave now corrected, the HB-C range can now accommodate more inductive load without immediate damage to the inverter. The charging function which is composite like the HB-A or HB-B models is able to deliver bulk current to the battery bank. Though the charging system may not be 3-stage, it has been improved to be able to restore battery bank capacity to about 80% of its rated capacity by sensitivity enhancement circuitry. The analogue and LED indicators are well arranged and redesigned to inform more accurately on the actual state of operation or status of the inverter. With the temperature controlled forced cooling fan the inverter can now be deployed to be used in tropical regions without fear of brown-out of the power transistors. The HB-C series are handy and have wide range of capacities and DC input ranges. The charger system has the ability to recover batteries from state of deep discharge, un any other inverter/charger in the market. Resistive and capacitive loads recommended include TV, lights music, and computers.