What are the main components of solar power sytem?

Solar modules (panels) and inverters are the main components of a solar power system and they constitute 70% of project cost.

How much area is required to install a rooftop solar system?

1 kWp solar system requires approximately 10 sq. m (or 100 sq. ft) of shadow free area. Therefore, one 1 MWp (1000 kWp) solar system would require 10,000 sq. m / 1,00,000 sq. ft / 3 acres of shadow free area.

What is the cost of a 1 MW solar system?

1 MWp (1000 kWp) solar system would cost around 6.5 crores, including all components, installation and comissioning, delivery and taxes.

What is the installation and commissioning period for a 1 MW solar power plant

1 MWp (1000 kWp) solar system would require 3-6 months time for installation and commissioning, and typically only 30-45 days of actual work at site.

What is the IRR of the solar project ?

IRR of the solar project is 15%-18%.

Do we need to take any precaution for wind loads?

Yes, wind load is considered. The wind load will depend upon the exact location. The installer should consider IS standards for the specific location. But solar power plants can be designed for any wind load.

What maintanance is required for a solar power plant?

Solar photovoltaic panels have no moving parts, and therefore require little maintenance, which will include module cleaning with water every 2-4 weeks and preventive electrical maintainance every 3 months.

How much electricity will be generated by a 1 MW (1000 kWp) solar plant in one year?

A 1 MW plant will generate around 15 lakhs units in the first year.

Will the energy produced degrade every year?

Yes, the power produced will degrade at 0.5 -0.8 % each year. In the 25th year the solar system will still produce 80-90% of the energy produced in the 1st year.

What will be the average life of the solar panels?

The solar panels have a warranty for a period of 25 years, however the projected life is longer.

How does it integrate in the system of a building?

The evacuation of solar power happens at the LT room, in most cases at 415 V.

What is the different between solar plant installation on a rooftop versus ground mounting?

Metal Rooftop solar requires 20% lower area than RCC roof top solar or ground mount systems. Rooftop solar helps to reduce room temperature by around 2 degree Celsius. Otherwise both system are equivalent.

Does the cost vary for installations on rooftop versus ground mount?

The cost of both systems is approximately the same on a per Wp basis.

Does the installation time vary for installations on rooftop versus ground mount?

Both the systems will need a period of 3-6 months for installation and commissioning.

How are solar panels mounted on metal rooftops?

Solar panels will be mounted on high-quality aluminium structures, which will be fixed to the roof sheets.

Is it possible to mount solar panels without drilling holes on the rooftop?

Yes. If the roof sheets belong to the standing seam segment, then solar panels can be installed without penentrating the roof. If not then penetration is necessary, although precautions are taken to prevent leakage. Installation on RCC roofs does not require any penetration.

Where will inverters be erected?

For installations greater than 1 MW in size, centeral inverters will typically be used and these will be set up in a separate room, called the control room. For smaller installations string inverters will be used and these will be erected on the roof or in the factory floor.

Will a roof mounted system damage my roof's warranty?

It will not, as you aren't tampering with the roof. Just as you use screws to fix the roof sheets, we use screws to fix the modules.

Will the cost/KWh reduce if the cost of solar panels fall?

No. As the cost of others components such as aluminium structures, copper wires are steadily rising and the total project cost is more or less stable.

What is the price of solar PV panels now?

Bought at a large scale, 1 KW of solar panel capacity costs 35-40,000 rupees for a high quality tier 1 module.

What is likely to happen to solar panel prices in the coming years

Solar panel prices have declined significantly in the past 5-10 years. However, since mid-2015, module prices have stabilised and started to increase due to surging demand for solar worldwide.

What would be the payback period?

The payback period would be 4 to 5 years.

Do you have to provide for loans?

It is depend upon the type of deal but yes we have the ability to provide for very low interest loans as Solar is a priority sector.

Which option is better OPEX or CAPEX?

Both are good. It is depend upon the customer requirement. For Opex is when you want no responsibility of running the plant but are ok with lower savings. For Capex is better when you have the capital and want to enjoy higher savings.

How fast is technology changing in solar?

Not very fast compared to the current notion. But yes with time we should see some efficiency improvements.

Are solar power tariff and grid rates are expected to fall?

Solar power tariffs are expected to fall and grid rates are expected to rise. However the fall in the tariff rates will not be very steep going forward.