1.What is Solar Rooftop Photovoltaic (SRTPV) System ?
A SRTPV system comprises of electrical and electronic equipment such as solar modules (panels), inverters, cables, switch gears, etc. When these components are connected together and the solar panels are exposed to sunlight, the system starts generating electricity
SRTPV Systems are of two types:
- Grid Connected SRTPV Systems
- SRTPV Systems with Storage Battery
2.What is a Grid Connected SRTPV System ?
A grid connected SRTPV system generates electricity that can either be injected directly into the distribution grid or used for captive consumption at the installation premises.
3.What are the Advantages of Grid Connected SRTPV System ?
- Economical and environment friendly electricity of better quality without voltage fluctuations.
- Excess energy can be fed into the grid with tariff as determined by the State Electricity Regulatory Commissions
- Electricity generation occurs at consumption center thus, saving transmission and distribution losses
- Lower payback period
- Minimal maintenance
- 25 years guaranteed lifespan of the solar photovoltaic panels
- Highly modular
- Quick installation
4.Can a SRTPV System Generate Electricity During Grid power outage ?
All grid-tied solar systems are installed with an automatic shutoff switch which turns off your solar system in a grid power outage.
5.What is Net Metering ?
Under net metering, electricity generated by the SRTPV system is first utilized by the consumer to meet their internal/captive requirements. Excess electricity, if any, is exported to the grid. Subsequently, when the consumer imports power from the grid, the exports are adjusted against the imports, lowering the electricity bill.
A net meter (bi-directional meter) records the energy imported from the grid to meet the load and surplus energy exported to the grid after consumption. Both energy import and export are recorded in the net meter. The difference between export and import readings is the actual energy consumed/delivered
6.What is Gross Metering ?
Under gross metering, all the electricity generated by the SRTPV system is exported to the grid and all the electricity required for consumption by the consumer is imported from the grid. The consumers are paid a feed-in tariff (FIT) for the electricity exported to the grid.
7.What is the Tariff for Net/Gross Metering in Case of Excess Generation ?
Tariff of Rs.3.99 per unit, However, this value is subject to change as per Govt. Policies.
8.How Much Space on the Roof do I Require for a SRTPV Installation ?
The grid connected SRTPV system of 1 kWp power capacity requires minimum 10 sq. m or 100 sq. ft. shadow free vacant area on the rooftop for installation.
9.How Much Time Will Be Required for Installation of a SRTPV System ?
SRTPV system can be installed within twotothree weeks depending upon its capacity & favorable site conditions, after all the local electricity board approvals are obtained.
10.What are favorable site condition ?
Favorable site conditions provide for easy installation of the system. For Eg:
a) Easy access to roof.
b)Availability of space for fitting the LightLeader power conditioning unit with protection from rain and direct sun.
c)Availability of space for earthling pits.
d)Building wiring with facility for inverter support, etc.
11.How Much Electricity Does a SRTPV System Generate ?
For every kWp the SRTPV system installed on a South-facing roof will generate 4 to 5 kWh (units) of electricity per day. However, depending upon the weather conditions the energy generation reduces by around 20 – 25 percent for an East or West facing roof.
12.Do I Need a Plan Permission from the Municipal /BBMP Authorities or any Pollution Clearance ?
Not required.
13.What Kind of Electrical Load Runs on SRTPV System in my Household/Industry ?
All kind of loads, including inductive, capacitive, and lighting can be run with SRTPV system.
14.What are the Components of a Grid Connected SRTPV System ?
A SRTPV system is made up of different components. These include PV modules (groups of PV cells), grid tied inverters, circuit breakers, SPD, contactor, energy meters (net/gross), module mounting structures (MMS), cables, etc.
15.How can I Decide the Capacity of SRTPV Plant ?
The capacity can be decided depending on the sanctioned load by the distribution utility & availability of shade free roof space.
16.What Types of Roofs Are Suitable for SRTPV Installation? Will my Roof Be Strong Enough ?
Most roofs are strong enough to take a solar installation without any reinforcement. However, in case of larger systems that may be heavier than the designed load carrying capacity of the roof, it is suggested to obtain the opinion of a qualified Structural Engineers at Conceptia.
17.What is the Durability/Lifespan of the SRTPV Plant? What are the Guarantees Available for the System ?
A solar panels has a lifespan of 25 years. However, other components of the system have 5 or more years warranty periods depending on the make of the product.
18.How does solar energy benefit the environment ?
Solar power is a renewable resource, which means there’s so much of it freely available we never have to dig for coal or refine other toxic energy sources just to keep the lights on.
Solar energy reduces your carbon footprint by decreasing greenhouse gas emissions (which contribute to climate change). Since it doesn’t produce any pollution, it also means we’ll have less harmful pollutants in our air, land, and water.
The high quality of the power supplied ensures longevity of electrical devices at home and offices.
19.At what stage should you plan solar power installation for your new house or building ?
If you are constructing a new house or a building, it is preferable to ask the architect to incorporate the solar plant requirement with the design of the house or building.
20.Can a SRTPV System Generate Electricity During the Night? How do we get Power During the Nights/Monsoons ?
No, SRTPV systems cannot generate electricity during the night. If a battery is used to store energy, then this energy can be used at night.
In case of a grid-connected SRTPV system, power supply will be available from the electric grid whenever there is an absence of generation by the system.
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