Project Report for 1MW Solar Power Plant
One megawatt of solar is an interesting middle ground — too large for a normal rooftop installation, but too small for a utility-scale IPP plant competing for DISCOM tenders. At 1MW, the most compelling application is almost invariably captive industrial electricity: a factory, hotel, college, or commercial complex replacing expensive grid power with cheaper solar energy. Sharda Associates creates detailed project reports (DPRs) for 1MW solar projects. Starting at ₹2,999.
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Why 1MW Is a Different Conversation from 5MW
Before delving into the mechanics of 1MW solar economics, it’s important to understand how this differs from the 5MW solar project discussed separately on this site – because the audience, business strategy, and project structure are actually different.
A 5MW solar plant is primarily a power producing business, since you sell electricity to a DISCOM through a long-term PPA or to a third-party industrial user via open access. The economics are determined by the tariff you can contract for, the project financing you can secure, and your ability to navigate state-level utility procurement processes.
This is why 1MW solar conversations in India are nearly always held inside.
- Manufacturing plants have significant electricity consumption and industrial tariffs of ₹6-10 per unit.
- Hotels and resorts with 24-hour electricity demand and business pricing
- Educational establishments (colleges, schools) with daytime loads that match solar generation
- Large commercial complexes, malls, hospitals.
- Cold storage facilities (electricity is their most operational expense
The Captive Power Economics — Why This Works
Here is the key calculation that makes 1MW captive solar appealing to industrial and commercial consumers:
- What you now pay: In India, industrial consumers typically pay between ₹6-12 per unit to their state DISCOM. The actual pricing varies by state and consumer category (HT industrial, LT commercial, etc.), but a good central India industrial benchmark is ₹7-8 per unit.
- What solar will cost you: Solar electricity generated from a 1MW plant, amortized over 25 years and accounting for O&M, costs around ₹2-3.50/unit, making it 50-65% cheaper than grid power.
- What that saves you: A 1MW facility in central India produces roughly 1.5-1.8 million units per year (at 17-20% CUF depending on location and panel type). Saving ₹5 per unit (₹7 grid rate minus ₹2 solar cost) translates to an annual savings of ₹75-90 lakh. The plant has a payback period of around 5-7 years for a build cost of ₹4-6 crore, with a 25-year lifespan.
The math is simple yet convincing. The complexity lies in the implementation aspects, such as net metering, load matching, grid backup, and the technical parameters that decide whether 1.5-1.8 million units of generation are achieved.
How Load Matching Works — And Why It Matters
A solar plant produces electricity only when the sun shines—typically 6-8 peak hours each day, focused in the middle of the day. For captive solar to perform efficiently, your facility’s electricity consumption pattern must include a large daytime demand.
Good load match (solar captive works very well):
- Manufacturing plants perform day shifts (8 a.m.-6 p.m.).
- Cold storage (refrigeration runs 24/7, but midday sun covers the majority)
- Educational institutions (school/college hours correlate nearly perfectly with solar generation)
- Hotels (common area lights, HVAC, and kitchen—significant daytime load)
Moderate load match (works but with more complexity):
- IT offices (predominantly 9am-7pm; good match, however air conditioning peaks in the afternoon)
- Hospitals (24/7 load with substantial daytime consumption)
- Commercial complexes (high daytime retail/office footfall)
Poor load match (net metering complexity increases):
- Businesses that operate primarily in the evening or at night
- Facilities with extremely erratic or seasonal consumption.
For sites with mismatched load profiles, extra daytime solar energy can frequently be exported to the grid under net metering arrangements, where the exported units offset future power bills. Net metering regulations and limits differ by state and should be understood before sizing the plant.
Ground Mount vs Rooftop — At 1MW Scale
A 1 MW solar plant can be installed as follows:
Rooftop installation: If the facility has a large enough roof area (about 2-3 acres equivalent of rooftop space, or roughly 1 lakh sq ft of flat rooftop), a 1MW rooftop installation can save money on separate land. The advantage is that the captive connection to the building’s LT supply eliminates the need for a separate HT connection. The constraints are the limited rooftop area and structural load capabilities.
Ground mount on owned/leased property: If there is insufficient rooftop space, 2-3 acres of flat land adjacent to or near the facility is used for a ground-mount system, which is linked to the facility via a dedicated HV cable. Costs slightly more for civil and electrical infrastructure than rooftop, but allows for greater flexibility in panel placement and orientation.
Hybrid (partial rooftop + partial ground): Increasingly frequent — using available rooftop space and supplementing with a modest ground-mount component to achieve a total of 1MW.
The project report should explain which configuration is appropriate and guarantee that the technical and budgetary criteria correspond to the actual installation type.
Net Metering — When You Generate More Than You Consume
Most Indian states allow net metering for solar installations up to a particular capacity threshold, which means that surplus generation exported to the grid is credited against future electricity bills. At 1 MW scale:
Some states impose net metering limits. States that exceed the net metering limit may be subject to gross metering or open access restrictions instead.
The distinction is important for the project report: if your state allows net metering for 1MW, the financial model includes credits for surplus generation. If not, the model must account for the fraction of generation that cannot be used on-site and may be squandered or exported at a lower rate.
State-specific net metering limits (as of recent regulations — subject to change):
- Madhya Pradesh: Net metering is available up to specific HT limitations.
- Rajasthan, Gujarat: Net metering frameworks are in place for industrial
- Check the current SERC (State Electricity Regulatory Commission) laws in your state.
Project Cost at 1MW Scale
Component | Cost Range (₹) |
Solar panels (1MW capacity, monocrystalline) | 70,00,000 – 1,00,00,000 |
Inverters (string inverters for 1MW) | 20,00,000 – 35,00,000 |
Mounting structure (rooftop or ground) | 20,00,000 – 35,00,000 |
Electrical BOS (cables, switchgear, metering) | 20,00,000 – 35,00,000 |
Civil works and installation | 10,00,000 – 20,00,000 |
Net metering/grid connection equipment | 5,00,000 – 15,00,000 |
EPC margin and project management | 15,00,000 – 25,00,000 |
Total (approx.) | ₹1.60 – 2.65 crore |
Wait – these are system-specific charges. Adding land (₹30-100 lakh depending on location) might increase the overall project investment to ₹4-6 crore for a well-specified installation on owned property, or ₹1.60-2.65 crore for a rooftop on an existing facility.
The large range reflects major differences in panel quality (Tier 1 versus lesser grade), inverter brand and specification, and EPC contractor pricing. The DPR should be based on actual market quotations for your specific configuration.
Financing — Standard MSME Term Loan Territory
Unlike a 5MW plant, which requires specialized project financing lenders, a 1MW captive solar system is often funded using a regular MSME term loan from a public or private sector bank. There are several reasons.
- The borrower is typically the facility owner (factory, hotel)—not a special-purpose vehicle—and the loan is secured against the business and/or the facility.
- The loan amounts (₹1-4 crore) fall within typical MSME lending guidelines.
- Many banks offer basic solar financing solutions with 7-10 year tenures and moderate rates.
The project report for a 1MW solar MSME term loan is thus more similar to a regular project report/DPR than the project finance documents required for 5MW+. It still involves generation estimates (CUF), savings calculations, and a realistic payback study, but it does not necessitate the 25-year PPA income modeling that a utility-scale IPP project does.
Why Choose Sharda Associates
- More than 45,500 project reports were delivered — Extensive experience with solar energy, renewable power projects, MSME financing, and captive solar plant DPRs.
- Captive Savings Model Correctly Built — Revenue is computed based on power cost savings, tariff replacement benefits, and actual yearly energy savings.
- Location-Specific CUF Calculations — Generation estimates are based on your state’s solar irradiation, climate conditions, and project location.
- Load Matching Analysis Included — We evaluate your facility’s power usage patterns to ensure accurate solar utilisation and savings forecasts.
- State Net Metering Regulations Documented — The report identifies and reflects the applicable net metering laws, capacity restrictions, and approval procedures.
- MSME Bank Loan Ready Format — Designed primarily for bank term loans, MSME finance, and renewable energy funding needs.Complete Financial and Technical Analysis — Contains generation estimates, savings computations, DSCR, payback period, IRR, project cost, and loan repayment predictions.
- Starting at ₹2,999 · 24–48 working hours ·
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Frequently Asked Questions
A 5MW project is often a power generation business, selling electricity to a DISCOM through a PPA or to a third party through open access, with project financing from specialist infrastructure lenders and 25-year financial modeling. A 1MW project is basically a cost-saving business for your own facility, replacing expensive grid electricity with cheaper solar, which is financed with a conventional MSME term loan. Different audiences, models, and reporting.
Industrial manufacturers with high electricity consumption (₹7-10/unit tariffs), hotels and resorts, cold storage facilities, educational institutions, hospitals, and large commercial complexes — anywhere with significant daytime electricity demand and already paying commercial or industrial electricity tariffs. The payback period improves as current electricity costs rise.
Approximately 5-7 years for a well-specified captive plant in central India, with a ₹7/unit grid pricing and ₹4-6 crore investment cost. The plants then provide near-zero-cost electricity for the remaining 18-20 years of their useful lives. The payback period is greatly reduced if grid tariffs rise (as they have historically) and the facility's electricity use increases.
In central India (Madhya Pradesh, Rajasthan, and parts of Maharashtra), a 1MW plant with 18-20% CUF produces roughly 1.58-1.75 million units (kWh) per year. This depends on the particular position, panel kind, tilt angle, and real irradiance circumstances. A location-specific CUF computation based on solar irradiance data is required for reliable generation estimations.
Net metering enables solar plant owners to export excess power to the grid and obtain credit against future electricity bills, essentially using the grid as a "battery" for when solar generation exceeds demand. At 1MW, net metering eligibility is determined by state legislation; some states limit net metering below 1MW for particular consumer groups, requiring the project report to explain what happens to surplus generation.
A ground-mounted system takes up about 2-3 acres. A rooftop installation requires roughly 5,000-7,000 square meters (50,000-70,000 square feet) of unshaded, structurally appropriate rooftop space. Many 1MW facilities use a combination of available rooftop and modest ground mount to achieve the necessary capacity.
Rooftops make use of existing building structures, saving money on land and providing a direct LT link to the building, but are restricted by available roof area and structural load. Ground mount needs 2-3 acres of land adjacent to the facility, which is more flexible in layout but increases land cost (if not already owned) and necessitates a cable connection from the array to the structure. Many 1MW projects combine the two to increase installed capacity on existing assets.
At the 1MW scale, the primary scheme support comes from state DISCOM's net metering framework (which offers the grid credit mechanism) and possibly state industrial solar incentives (some states include additional incentives for industrial solar power in their industrial policies). Central MSME term loan schemes (including MSME credit guarantees under CGTMSE) are available for financing. Capital subsidies (such as PMEGP) are often not available at the 1MW scale; they are intended at smaller, labor-intensive firms.
Annual operations and maintenance (O&M) for a 1MW plant, including panel cleaning, inverter monitoring, and minor repairs, costs around ₹3-6 lakh or ₹3-6 per watt. This should be included as a fixed operating cost in the financial model, with small increases during the plant's life.