FAQs

What are the main components of a Grid Connected Rooftop Solar PV system?

• Solar PV Modules/Solar Panels – The Solar PV modules/Solar Panels convert

solar energy to DC (direct current) electrical energy. They are available in

different technologies such as crystalline silicon, thin film silicon, CIGS, CdTe,

HIT, etc. Crystalline Silicon Solar PV panels are most commonly used in solar

rooftop system. Multiple panels are connected together to form arrays as per the

desired capacity of the system.

• Inverter – Inverter converts variable DC output of Solar PV panels into AC

power. Inverter also synchronizes with the grid so that generated power from the

module can be injected into the grid.

• Module mounting structure – The module mounting structure, is the support

structure that holds the Solar PV panels in place for full system life and is

exposed to all weather conditions. These are normally fixed at particular angle

and orientation in case of solar rooftop system. But these can also be of type that

tracks the Sun, called as trackers.

• Bi-direction Meters – Meters are used to record the generation or consumption

of electricity. Bi-direction (or Net-Meters) are used to keep track of the electricity

that solar PV system injects to utility grid and the electricity that is drawn from

the utility grid.

• Balance of System – These consist of cables, switchboards, junction boxes,

earthing system, circuit breaker, fuses, lightning protection system, etc.

What is the daily energy generated from a 1 kWp Solar Power Plant?

On a clear sunny day, 1 kWp solar power plant can generate 4 to 5.5 units in a day

What are the advantages of Grid-Connected Rooftop Solar System?

• Saving on electricity bill by the consumer.

• Utilization of available vacant roof space, no additional land required.

• Low gestation period.

• No additional requirement of transmission and distribution (T&D) lines.

• Reduces T&D losses as power consumption and generation are collocated.

• Improvement in the tail-end grid voltages and reduction of system congestion.

• Long term energy and ecological security by reduction in carbon emission.

• Better management of daytime peak loads by DISCOM/ utility.

What are the factors affecting generation?

• Plant Location

• Quality of equipment used

• No. of sunshine hours

• Workmanship

• PV module tilt angle and orientation

• Module Cleaning

• O&M activities etc.

• Who can get the subsidy on solar?

Type of sector--Solar Subsidy

Residential sector 

( up to 3 kW Capacity) 

 Rs 14,588 per kW

Residential sector

(above 3 kW up to 10 kW)

 Rs 7294 per kW up to 10 kW

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Solar System Capacity -Applicable Subsidy

1kW -  Rs 14,588

2kW -  Rs 29,176

3kW -  Rs 43,764

4kW -  Rs 51,058

5kW -  Rs 58,352

6kW -  Rs 65,646

7kW -  Rs 72,940

8kW -  Rs 80,234

9kW -  Rs 87,528

10kW -Rs 94,822