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ELECTRICITY - Powered by “The Sun”, Delivered by NISAURJA

The National Action Plan for Climate Change (NAPCC) released in June 2008 outlines a national strategy that aims to enable the country to adapt to climate change and enhance the ecological sustainability of India’s development path. As a part of this change, NISAURJA POWER provides on-grid and off-grid solar PV solution for residential, industrial and commercial application for electricity generation and to create sustainability. Several cities and towns in the country are experiencing a substantial growth in their peak electricity demand. Municipal Corporations and the electricity utilities are finding it difficult to cope with this rapid rise in demand and as a result most of the cities and towns are facing severe electricity shortages. Various industries and commercial establishments e.g. Govt. Building, Schools and colleges, Hostel, Malls, Hotels, Hospitals, Nursing homes etc housing complexes developed by the builders and developers in cities and towns use diesel generators for back-up power even during the day time. These generators capacities vary from a few kilowatts to a couple of MWs. Generally, in a single establishment more than one generator are installed; one to cater the minimum load required for lighting and computer or, other emergency operations during load shedding and the others for running ACs and other operations such as lifts and other power applications. With an objective to reduce dependency on diesel gensets, NISAURJA intends to provide solar systems as an alternative solution to reduce the dependency on the conventional energy source. Further, in order to utilize the existing roof space of buildings, the scheme proposes to promote rooftop solar PV systems on buildings to replace DG gensets installed for minimum load requirement for operation during day hour which could minimize the electricity bill and reduce the dependency on unavailability of grid as well as diesel genset

A rooftop solar PV system could be with or, without having grid interaction. In grid-interactive system, the DC power generated from solar PV panels is converted to AC power using power conditioning unit and is fed to the grid either of three-phase line or, of single-phase line depending on the system installed at institution, commercial establishment or, residential complex. It used to generate power during the daytime which is utilized fully by powering the captive loads and feeding excess power to the grid as long as grid is available. In cases, where solar power is not sufficient due to cloud cover etc. the captive loads are served by drawing power from the grid. The grid-interactive rooftop solar PV systems thus work on ‘net-metering’ basis wherein the beneficiary pays to the utility on net meter reading basis only. Ideally, grid interactive systems do not require battery backup as the grid acts as a back-up for feeding excess solar power and vice-versa. However, to enhance the performance reliability of the overall systems, a minimum battery-back of one hour of load capacity is strongly recommended.

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