Photovoltaic Power System with Battery Backup and Grid-Connection to Reduce Grid Dependency During Peak Demand Hours and Power Cuts

Sun is considered as best and cleanest renewable energy source. This energy can be converted into electrical energy using array of solar cells. The generated electrical energy thus can be utilized to run the electrical appliances. Running these electrical appliances inevitably depends on the availability of utility grid. Sometimes the geographical, environmental and societal conditions affect the availability of utility grid; that’s why the battery backed inverters are becoming one of the must have amenity at homes and offices. In the present research work, we have converted this battery backed inverter to the solar PV powered battery backed system in order to reduce grid dependency for charging the batteries and reducing the utility bill. The system is designed, tested and installed for a 2 BHK house situated in civil hospital complex, Panipat at Latitude 29.401, Longitude 76.971 and Elevation 232 m, in the Haryana State of Northern India. Panipat city is in the National Capital Region (NCR) and have capability to represent approximately 1.6 million houses in the entire region including states Punjab, Haryana, Delhi, western part of Uttar Pradesh State and Eastern part of Rajasthan State. Total energy demand for peak hours i.e. from 6:00 PM to 10:00 PM for total 4 h comes out to be 2250 Wh/day. So, the system was designed according to 2250 Wh/day. System’s cost was, Rupees Sixty Thousand Four Hundred (Rs. 60,400/-). System is working without losing power on a single day and producing electricity. Normally, the billing without installing the system was approximately, Rupees One Thousand Four hundred (Rs.1,400/-) for 350 units (1 unit = 1 kWh).