Solar – Grid Hybrid System – A Cost Effective and Improved Renewable Energy Utilization Approach

A Solar-grid hybrid system design has been proposed in this paper. The design is expected to provide an economical and sustainable power supply to the AC loads. A Differential amplifier and series P channel MOSFET linear regulator technology based charge controller has been used to attain faster charging. An automatic relay based Switching between solar & grid has also been developed utilizing essential power being generated from solar; an automatic switching to solar & reducing power consumption from grid. Vice versa, if renewable output being moderately less then power demand, then it will switch to both solar and grid. Finally, when grid supplies main power when renewable output turns out to be insufficient. A real time online Wi-Fi module based monitoring circuit has been incorporated and adapted to monitor the whole system for efficient operation of the system.