The four phases can be digitally controlled for a single phase load. The available phase- out of the three from direct source and one from the inverter source will connect from the load automatically if power trips at other. This is a complete, assembled working project / model (duly tested) at our work shop. This is a handmade project on a general purpose PCB and uses Electronics / Electrical components as per requirement of a particular model. A rough report & study material related to project will be mailed to student on request.