Off-Grid Hybrid Solar Power Conditioning Unit for Critical and Non-Critical Loads

The aim of the designed power conditioning unit is to eliminate the need of separate offline inverter, MPPT charge controller and online UPS for sensitive loads. Another feature of the designed system is to isolate critical load from noncritical load in order to improve the backup power with minimal battery banks. It includes grid charger, online inverter and MPPT charge controller all together in a compact size. It includes grid charger which allows wide range of input voltage fluctuations. The MPPT charge controller used is a PWM controlled DC-DC converter which extracts maximum possible power coming from sun. The system is controlled with DSPic controller which ensures remarkably quick operation and is economical to use in case of cost consideration.