The MNRE has issued the benchmark cost (without adding subsidy) as follows. Sr No Capacity Benchmark Cost (Rs/kWp) 1 Above 1 kW and up to 10 kW Rs. 54,000 2 Above 10 kW and up to 100 kW Rs. 48,000 3 Above 100 kW and up to 500 kW Rs. 45,000 Please note that this cost is inclusive of solar modules, inverter and material for civil structure, AND transportation, installation, cabling, civil works, and operation & maintenance (O&M).In the case of CAPEX business model, the O&M cost up to 5 years is included. However, in the RESCO model, the vendor shall provide O&M for 25 years of panel life. Regardless of the model, a standard warranty of 5 years is also provided for the system.
A Photovoltaic system is a power system that converts light to electricity using one or several Solar panels/modules. A PV system consists of a number of solar panel/modules that produce DC electricity in presence of sunlight, an inverter which converts DC energy to AC energy for either direct consumption, storage in battery banks or feeding into the electricity grid.
The two different Business models for installation decide who bears the cost of system installation. RESCO: Renewable Energy Services Company operates under the model in which the Company bears the cost of system installation. The Company sells electricity to the consumer at a predefined rate which may be less than the cost derived by the consumer from the grid. Additionally, under this financing model, the responsibility for Operation and Maintenance of the Rooftop PV System lies solely with the vendor and is available for 25 years of panel life. CAPEX: The Capital Expenditure model requires the Consumer to finance the cost of system installation. This allows the Consumer to have full ownership rights over the system. Under this model of financing, the vendor will provide free maintenance for the first 5 years. The responsibility of checking operability and proper functioning of the system rests with the consumer once the maintenance contract expires. This, however, can be renewed for a fee if the consumer wishes to. The conditions are negotiated between the consumer and the vendor.
This is a special circumstance. Depending on the available shadow-free area, the solar panels may require some form of elevation or increase in mounting height, in order to draw maximum sunlight. In such a case, the cost depends on vendor-consumer negotiation.
The rooftop solar system can be majorly classified into the following 3 types: Off-grid: These Solar PV systems are deployed in remote locations, where access to grid electricity is limited or non-existent. The system generates power during the day, which can be stored in batteries. The power generated can either be consumed during the day simultaneously or during the night by utilizing the storage devices. Grid-connected: Rooftop PV Systems connected and operating in tandem with grid electricity are called Grid-Connected Rooftop PV (GRPV) systems. These are deployed in urban areas with reliable access to grid. The system generates power during the day, which is deemed to be consumed first by the household or load and only in the case when generation is excess does it get sent to the grid. Owing to the reduced consumption from the grid, the consumer is compensated in the monthly electricity bill. Hybrid (Grid-tied with storage): A hybrid system uses one or more combinations of Rooftop PV systems, grid connection and storage devices. Although expensive, such systems have the advantage of power continuity and increased reliability during either non-solar days or shortage from the grid.
A Grid-connected Rooftop Solar PV system of 1 kW peak power capacity requires about 100 square feet or 10 square meters of the shadow-free area on the rooftop.