Industrial Solar System —
Large-Scale Power for Manufacturing
A large-capacity solar power installation designed for manufacturing plants, industrial parks, and heavy-consumption facilities to slash per-unit production costs.
What Is an Industrial Solar System?
An industrial solar system is a large-capacity solar power installation designed for manufacturing plants, industrial parks, textile mills, steel and cement units, chemical plants, cold storages, and other heavy-consumption facilities.
Industrial systems typically range from a few hundred kW to several MW, and are built on factory rooftops, industrial sheds, or adjacent open land (ground-mount). Given the high and steady power consumption of industrial units, solar can offset a significant share of daytime grid dependency, directly reducing per-unit production costs for manufacturers across industrial belts like Gurugram, Faridabad, Pune, Ahmedabad, and Coimbatore.
High-Capacity Panels
Utility-grade mono-PERC or bifacial modules chosen for durability and long-term output over large rooftop or ground areas.
Central/String Inverters
Large-capacity inverters that handle high current loads efficiently, often with SCADA-based remote monitoring.
Heavy-Duty Mounting
Engineered structures for industrial sheds, RCC rooftops, or ground-mount systems, designed for high wind/load tolerance.
Transformers & Switchgear
Step-up transformers and protection switchgear to safely integrate solar power with the plant's electrical infrastructure.
Metering Arrangements
Metering setup depends on whether the plant uses captive consumption, group captive, or open access solar power.
SCADA Monitoring
Centralized monitoring for real-time generation data, fault detection, and performance analytics across the plant.
How Does an Industrial Solar System Work?
Integrating MW-scale solar generation into heavy manufacturing load profiles.
1. Massive Generation
Solar panels across the rooftop or ground-mounted array generate DC electricity throughout daylight hours.
2. Bulk Conversion
Central or string inverters convert this DC power into AC power suitable for industrial machinery and equipment.
3. Direct Integration
Power is fed directly into the plant's electrical system, reducing the load drawn from the grid or captive power source.
4. Grid/Bank Export
Depending on the model (captive, group captive, open access), surplus power may be exported, banked, or adjusted.
5. Uninterrupted Supply
During non-operating hours or cloudy days, the grid or existing power source continues to meet the plant's requirements.
6. Reduced Ops Cost
Plant electricity costs drop in direct proportion to how much of the daytime industrial load is met by solar generation.
Benefits of Industrial Solar for Manufacturing Units
Reduce per-unit production cost
Industrial tariffs are among the highest, making solar savings substantial at scale.
Captive & group captive models
Multiple industrial units can jointly own a solar plant and share power at reduced cost.
Open access solar power
Large consumers can procure solar power from off-site farms at rates below grid tariffs.
Accelerated depreciation
Substantial first-year tax depreciation benefit under Income Tax rules, improving project ROI.
Energy security
Reduces dependence on grid power and diesel generators, valuable in areas with outages.
Sustainability compliance
Supports compliance with ESG mandates, buyer sustainability audits, and carbon reduction targets.
Industrial Solar: Ownership Models
Choose the structure that aligns best with your plant's capital availability, space, and risk appetite.
| Model | How It Works | Best For |
|---|---|---|
| CAPEX (Self-Owned) | Plant owns the solar system outright and claims full tax depreciation benefits. | Units with capital available and long-term site ownership. |
| OPEX (Lease/PPA) | Developer installs and owns the system; plant pays a fixed per-unit rate. | Units wanting solar savings without upfront investment. |
| Captive / Group Captive | Plant owns a stake in an off-site solar plant and consumes power under captive rules. | Units without adequate roof/ground space on-site. |
| Open Access | Plant purchases solar power from a third-party farm via the state's open access mechanism. | Large consumers (1 MW+ demand) seeking lower tariffs. |
Industrial Solar Price in India
Pricing depends on capacity, mounting type (rooftop vs ground-mount), structural complexity, and grid connectivity requirements.
| System Size | Suitable For | Approx. Price Range |
|---|---|---|
| 100 kW | Small industrial unit | Rs. 40L - 48L |
| 250 kW | Mid-size manufacturing unit | Rs. 95L - 1.1Cr |
| 500 kW | Large manufacturing plant | Rs. 1.8Cr - 2.1Cr |
| 1 MW | Industrial park / large facility | Rs. 3.4Cr - 3.9Cr |
| Above 1 MW | Multi-plant / captive project | Custom quote |
Savings & Approx ROI (25 Yrs)
| System Size | Payback Period | Approx ROI |
|---|---|---|
| 100 kW | ~3-4 years | ~11x |
| 250 kW | ~3 years | ~12x |
| 500 kW | ~3 years | ~13x |
| 1 MW | ~2.5-3 years | ~14x |
Tax Benefits: Accelerated Depreciation
Industrial units installing solar under the CAPEX model can claim accelerated depreciation under Income Tax rules, allowing a large share of the system cost to be written off in the first year itself. This makes industrial solar one of the fastest-paying-back capital investments.
Choosing the Right System Size
| Monthly Electricity Bill | Recommended System |
|---|---|
| Rs. 3,00,000 - 8,00,000 | 100-150 kW |
| Rs. 8,00,000 - 20,00,000 | 250-350 kW |
| Rs. 20,00,000 - 40,00,000 | 500-750 kW |
| Above Rs. 40,00,000 | 1 MW & above |
Actual payback and ROI depend on the plant's electricity tariff category, load factor, roof/ground availability, ownership model chosen, and applicable tax depreciation benefits.
How Industrial Solar Installation Works
Site & Load Survey
Engineers assess rooftop/ground area, structural capacity, shading, and the plant's detailed load curve.
Feasibility & Model Selection
Recommend CAPEX, OPEX, captive, or open access model based on power needs and investment appetite.
System Design & Engineering
Detailed engineering drawings, structural design, and electrical integration plan prepared for the plant.
Approvals & Grid Connectivity
Coordination with the DISCOM/transmission utility for metering, grid synchronization, and clearances.
Installation & Commissioning
Phased installation of structures, panels, inverters, and switchgear, scheduled to avoid production downtime.
SCADA Monitoring & Maintenance
Ongoing performance monitoring, preventive maintenance, and periodic servicing to sustain output over 25 years.
Frequently Asked Questions About Industrial Solar
Is government subsidy available for industrial solar?
No, PM Surya Ghar subsidy applies only to residential systems. Industrial units benefit instead from accelerated depreciation and, where applicable, open access or captive power tariff savings.
What's the difference between captive and open access solar?
In a captive model, the plant owns a stake in the solar project and consumes power under captive consumption rules. In open access, the plant simply purchases solar power from a third-party generator at a discounted tariff, without any ownership.
Can industrial solar be installed without halting production?
Yes. Installation is typically phased and scheduled around production timelines to minimize any operational disruption.
What ownership model is best for my plant?
It depends on available capital, roof/ground space, and risk appetite — CAPEX suits plants with capital and space, while OPEX, captive, or open access suit plants preferring zero upfront investment or limited on-site space.
How long does an industrial solar system last?
With proper engineering and maintenance, industrial solar systems reliably generate power for 25 years or more.
Can industrial solar work with existing diesel generator backup?
Yes, solar can be integrated alongside existing DG sets or grid connections as part of a hybrid power strategy to reduce overall energy costs.