100KW Solar Plant Cost for Factory in India (2026 Guide)
The cost of a 100kW solar plant for a factory in India typically ranges between ₹38 lakh to ₹45 lakh, depending on panel technology, inverter selection, structure type, and site conditions.
This guide is created by Hyenr Green Energy ( Solar Services company ), a trusted industrial solar EPC brand under Source Natural Foods & Herbal Supplements Ltd – a listed company, based on real factory solar project experience.
What Is a 100kW Solar Plant Suitable For?
A 100kW rooftop solar plant is ideal for:
- Manufacturing factories
- Engineering units
- Textile & garment units
- Warehouses
- Aerospace & precision industries
Factories with high daytime electricity consumption benefit the most from a 100kW solar installation.
100kW Solar Plant Cost Breakdown (Factory Use)
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Component-wise Cost Details
| Component | Approximate Cost (₹) |
|---|
| Solar Panels (Mono PERC / TOPCon) | 18 – 20 lakh |
| String Inverters | 6 – 7 lakh |
| Mounting Structure (Rooftop) | 4 – 5 lakh |
| BOS, DC/AC Cables & Protection | 3 – 4 lakh |
| Installation, Testing & Commissioning | 3 – 4 lakh |
| Total Estimated Cost | ₹38 – 45 lakh |
Note: Cost may vary based on roof height, shadow-free area, DISCOM norms, and safety requirements.
How Much Electricity Does a 100kW Solar Plant Generate?
A 100kW solar plant installed on a factory rooftop generates approximately:
4 to 4.5 lakh units (kWh) per year
- Average daily generation: 400–450 units/day
- Generation depends on:
- Location
- Roof orientation
- Shadow-free availability
- Maintenance quality
Savings, ROI & Payback Period
For factories paying ₹8–10 per unit:
- Annual savings: ₹32–40 lakh over 10 years
- Payback period: 3–4 years
- ROI: 25–30% annually
- Plant life: 25+ years
After payback, electricity cost is almost zero for the remaining life of the plant.
Roof Area Required for 100kW Solar Plant
- Required rooftop area: 8,000 – 10,000 sq. ft.
- Suitable roof types:
- RCC rooftop
- Metal sheet shed
- Pre-engineered buildings (PEB)
A detailed site survey is required before final confirmation
Net Metering & Approvals for Factory Solar
- A 100kW rooftop solar plant for a factory typically requires:
- DISCOM approval
- Net metering agreement
- Electrical safety compliance
- CEIG approval (if applicable)
Hyenr Solar Services provides end-to-end approval support.
Real Industrial Experience
Hyenr Solar Services has successfully executed industrial rooftop solar projects, including installations for Innomach Aerospace, demonstrating our expertise in high-precision and high-load factory environments.
We specialize in:
- Industrial & commercial solar EPC
- Turnkey rooftop solar solutions
- Safety-compliant installations
Why Choose Hyenr Solar Services?
- Industrial solar EPC specialist
- Backed by Source Natural Foods & Herbal Supplements Ltd (Listed Company)
- Proven factory & aerospace project experience
- Transparent costing & realistic ROI
- End-to-end service: design → approvals → installation → O&M
Frequently Asked Questions (FAQs)
- Is a 100kW solar plant suitable for factories?
Yes. Factories with high daytime load and consistent power usage benefit the most from a 100kW solar plant.
- How long does installation take?
Typically 6–8 weeks, including approvals and commissioning.
-
What is the maintenance cost?
Annual maintenance cost is around 1–1.5% of project cost.
- Can excess power be exported to the grid?
Yes, through net metering, subject to DISCOM rules.
- What is the warranty on solar panels?
Most panels come with 25-year performance warranty.
Get a Custom 100kW Solar Cost for Your Factory
Every factory is different. Roof design, load profile, and DISCOM rules impact final cost.
👉 Contact Hyenr Solar Services for a detailed site survey and customized 100kW solar proposal tailored to your factory.
