Question 1

How much does a solar system cost in India?

Accepted Answer

The cost of a solar system in India ranges from ₹50,000 to ₹70,000 per kW before subsidies. After the PM Surya Ghar subsidy, the effective cost for residential systems can be as low as ₹35,000-45,000 per kW. For a typical 3 kW residential system, you can expect to pay ₹1.5-2.5 lakhs after subsidy.

Question 2

How long do solar panels last?

Accepted Answer

Quality solar panels come with a 25-year performance warranty and typically last 30-35 years. They degrade at about 0.5-0.7% per year, meaning after 25 years, they still produce around 85% of their original output. Inverters usually need replacement after 10-15 years.

Question 3

How much space do I need for solar panels?

Accepted Answer

You need approximately 100 sq. ft. (10 sq. meters) of shadow-free roof area per kW of solar capacity. A typical 3 kW residential system requires about 300 sq. ft., while a 5 kW system needs around 500 sq. ft. The roof should ideally face south for maximum generation.

Question 4

Do solar panels work during monsoon or cloudy days?

Accepted Answer

Yes, solar panels work during cloudy days but at reduced efficiency (typically 25-40% of normal output). During monsoon, you may generate 50-60% less power than sunny months. However, annual calculations account for seasonal variations, and grid connectivity ensures uninterrupted power supply.

Question 5

What is the payback period for solar investment?

Accepted Answer

The payback period in India typically ranges from 3-5 years for residential systems and 2-4 years for commercial systems (due to higher tariffs and accelerated depreciation benefits). After payback, you enjoy virtually free electricity for the remaining 20+ years of the system's life.

Question 6

What is the difference between on-grid and off-grid solar?

Accepted Answer

On-grid (grid-tied) systems are connected to the utility grid and use net metering to export excess power. They're cheaper and more common in urban areas. Off-grid systems use batteries to store power and are completely independent of the grid, ideal for remote locations or areas with unreliable power supply.

Question 7

Should I choose monocrystalline or polycrystalline panels?

Accepted Answer

Monocrystalline panels are more efficient (18-22% vs 15-17%), require less space, and perform better in low-light conditions. They're slightly more expensive but recommended for space-constrained roofs. Polycrystalline panels are more affordable and work well when space is not a constraint.

Question 8

What happens during a power outage?

Accepted Answer

For on-grid systems without batteries, the solar system automatically shuts down during grid outages for safety reasons (to protect utility workers). If you want power during outages, you need a hybrid system with battery backup, which adds to the cost but provides energy independence.

Question 9

How often do solar panels need maintenance?

Accepted Answer

Solar panels require minimal maintenance - primarily cleaning every 2-4 weeks to remove dust and debris. Professional inspection is recommended once a year. Inverters may need occasional servicing. There are no moving parts in solar systems, reducing maintenance needs significantly.

Question 10

What size solar system do I need for my home?

Accepted Answer

System size depends on your electricity consumption. As a rule of thumb, divide your monthly electricity bill by ₹500-600 to get the approximate kW capacity needed. For example, if your bill is ₹3,000/month, a 5-6 kW system would typically cover your needs.

Question 11

How do I apply for the PM Surya Ghar subsidy?

Accepted Answer

Apply through the National Portal (pmsuryaghar.gov.in). Steps: 1) Register with your electricity bill details, 2) Get feasibility approval from DISCOM, 3) Install through an empanelled vendor, 4) Get net meter installed, 5) Upload commissioning certificate. The subsidy is directly credited to your bank account after verification.

Question 12

Can I get a loan for solar installation?

Accepted Answer

Yes, many banks offer green energy loans for solar installations at competitive interest rates (typically 8-12%). Some banks offer collateral-free loans up to ₹10 lakhs. EMIs are often less than your current electricity bill, making solar affordable through financing.

Question 13

Is GST applicable on solar systems?

Accepted Answer

Solar systems attract 12% GST (5% for solar panels and cells, 12% for other components). However, businesses can claim input tax credit on GST paid. Some states offer additional GST exemptions or reimbursements for solar installations.

Question 14

What is accelerated depreciation and who can claim it?

Accepted Answer

Accelerated depreciation allows businesses to claim 40% depreciation on solar assets in the first year itself, significantly reducing taxable income. This benefit is available to all commercial and industrial installations and can reduce effective solar costs by 25-30% for profit-making businesses.

Question 15

How does net metering billing work?

Accepted Answer

With net metering, your electricity meter runs backward when you export power and forward when you consume from the grid. At month-end, you're billed only for the net consumption. If you export more than you consume, credits carry forward (settlement period varies by state - monthly, quarterly, or annually).

Question 16

How long does solar installation take?

Accepted Answer

Physical installation takes 2-5 days depending on system size. However, the entire process including permissions takes 4-8 weeks: application (1-2 weeks), DISCOM approval (2-4 weeks), installation (3-5 days), inspection and net meter installation (1-2 weeks).

Question 17

Do I need to modify my roof for solar installation?

Accepted Answer

Most roofs can accommodate solar panels without major modifications. Mounting structures are designed for RCC, metal, and tile roofs. Some reinforcement may be needed for very old structures. A site survey determines the exact requirements and any structural modifications needed.

Question 18

What permissions are required for rooftop solar?

Accepted Answer

You need: 1) Application to local DISCOM, 2) Feasibility approval, 3) Net metering agreement, 4) Installation by empanelled vendor, 5) DISCOM inspection and commissioning certificate. For systems above 10 kW, additional electrical inspector approval may be required.

Question 19

Can I install solar on a rented property?

Accepted Answer

Yes, but you need written consent from the property owner. The net metering agreement and subsidy (if applicable) would typically be in the owner's name. Some tenants negotiate splitting benefits with landlords. Alternatively, Third Party PPA models allow solar without ownership.

Question 20

What warranty comes with solar systems?

Accepted Answer

Typical warranties include: Solar panels - 25 years performance warranty (80% output at 25 years), 10-12 years product warranty. Inverters - 5-10 years warranty (extended warranty available). Mounting structure - 5-10 years. Installation workmanship - 1-5 years depending on the installer.

Solar 101: Your Complete Guide

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