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100 kW · Industrial rooftop system

100 kW solar system in Indore

Large factories, cold chains, hospitals and campuses.

At a glance

1,45,900units / year

Price
₹34 lakh – ₹42 lakh
Savings / month
₹97,267
Payback
3.2 years

Specifications & numbers

System size
100 kWp
Modules
184 × 545 W mono
Roof area
~9,000 sq ft
Generation / month
~12,158 units
Generation / year
~1,45,900 units
Price (before subsidy)
₹34 lakh – ₹42 lakh
PM Surya Ghar subsidy
Not applicable
Net cost (mid)
₹38 lakh
Savings, year 1
₹11,67,200
Savings, 25 years
₹3.98 crore
EMI (indicative)
₹79,807/mo · 9.5% · 5 yrs
CO₂ avoided, 25 years
2440.1 t

Month by month in Indore

12,700Jan12,700Feb14,800Mar13,900Apr14,200May11,300Jun8,800Jul8,500Aug10,900Sep13,100Oct12,600Nov12,400Dec
Units per month Monsoon months

What it can run

  • Multi-shift production (daytime share)
  • Chillers and cold rooms
  • Campus buildings
  • Water and effluent treatment

Good to know

  • About 184 modules and 9,000 sq ft of roof.
  • Needs an electrical load study and DISCOM approvals planned at the start.

100 kW solar: questions

How much space is needed for a 100 kW rooftop solar plant?

Around 9,000–10,000 sq ft of usable, shadow-free roof, or an equivalent split across multiple buildings. Ground-mount or carport structures can make up any shortfall.

Do businesses and factories get solar subsidy?

No — PM Surya Ghar subsidy is only for residential connections and housing societies. Businesses benefit instead from higher tariffs (so faster payback) and, where applicable, accelerated depreciation on solar assets. Ask your CA how it applies to you.

Is rooftop solar worth it for a factory in Indore or Pithampur?

Usually, yes. Factories with daytime operations consume most of their solar generation on site, offsetting industrial tariffs. Typical payback is 3–4 years, and accelerated depreciation can improve returns further for profitable businesses.

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