Commercial solar plant costs in India vary by system size, panel technology, inverter, structure, installation scope and project location. Indicative 2026 costs can range from around ₹40,000–₹50,000 per kW for many mid-sized projects, while larger plants may have a lower cost per watt. Final pricing depends on the EPC quote and site requirements.

A 100 kW rooftop solar plant generally requires around 10,000 sq ft of shadow-free roof area. The actual requirement can vary depending on panel efficiency, module layout, roof orientation, tilt, maintenance pathways and available space.

The payback period depends on electricity tariffs, solar generation, system cost, financing, self-consumption and applicable charges. Many commercial projects are designed around a payback period of roughly 3–6 years, but the actual period should be calculated from your electricity bill and EPC quotation.

Central residential rooftop subsidies such as PM Surya Ghar are intended for eligible residential consumers and do not generally apply to commercial solar plants. Commercial projects may, however, benefit from applicable state policies, tax provisions, renewable-energy regulations or other incentives depending on the project and location.

Under the CAPEX model, the business pays for the solar plant and owns the system. Under the RESCO or OPEX model, a third-party developer finances, owns and operates the plant, while the business typically pays for the solar electricity under an agreed commercial arrangement. Contract terms vary by project.

Businesses may be able to claim depreciation on eligible solar power assets under applicable Indian income-tax rules. The allowable rate and treatment depend on the asset classification, ownership structure, tax regime and applicable rules for the relevant financial year. Businesses should confirm the current treatment with their tax professional.

Surplus solar power can be exported to the grid where the applicable state regulations, DISCOM rules and project arrangement allow it. The treatment of exported electricity may involve net metering, gross metering, net billing or other mechanisms depending on the consumer category and state.

Green Energy Open Access allows eligible consumers to procure electricity from renewable-energy generators through the electricity network instead of relying only on their existing supply arrangement. Eligibility, minimum consumption requirements, charges and approvals depend on applicable regulations and state implementation.

Physical installation can take a few days to several weeks depending on plant capacity, roof or land conditions, structure work, equipment availability and project complexity. The complete project timeline can be longer because it may also include design, approvals, procurement, installation, testing and commissioning.

Commercial solar plants require regular module cleaning, inverter checks, electrical inspections, cable and connection checks, earthing verification and performance monitoring. Preventive maintenance and periodic inspection help identify faults early and maintain system generation over the operating life of the plant.