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Opex Model

Operational Expenditure (Opex) Model

In the Operation Expenses (OPEX) Model, the customer is responsible only for covering the operating expenses, while the entire investment associated with installing and operating the solar plant is managed by SUNRITI PROJECTS. This approach is commonly referred to as the RESCO Model (Renewable Energy Service Company) or the BOOT Model (Build, Own, Operate, Transfer).

In this CAPEX model, the customer retains ownership of the plant and is eligible for tax benefits related to depreciation. The payback period for this CAPEX model typically spans around 5 to 6 years, factoring in considerations like module degradation, operation and maintenance costs, and more.

How the Opex Model Works:

  • The customer enters into a Power Purchase Agreement (PPA) with SUNRITI PROJECTS at a mutually agreed tariff rate and term (period).
  • During the PPA term, the customer pays for the power consumed.
  • After the PPA term ends, the assets can be transferred to the customer at a mutually agreed price. Alternatively, the customer may have the option to buy back the assets during the contract period.

Solar Power Trading

We provide Open Access Power Trading services to customers who have short, medium or long term power requirements at costs that are much lower than the normal DISCOM power. We have partnered with renewable power producers and suppliers to provide:

  • Group Captive Solar Power
  • Interstate Solar Power
  • Medium to Long Term Solar - 3 Years / 5 Years / 10 Years
  • Third Party Open Access Mode

Types of Solar Plants Available Under Various Financial Models


  • In-Plant solution
    In-Plant Solution (On Grid / Grid Interactive Solar)
  • Open-Access Solution
    Open Access Ground Mounted solution away from Premises (On Grid /Grid Interactive Solar)

In-Plant solution

Under the In-Plant Solution, the Solar PV Power project is strategically placed within the customer's plant premises, leveraging technically advantageous locations. There are several installation options available to suit the customer's preferences and feasibility:

  • Solar panels can be installed in areas with ample sunlight and devoid of shadows, including rooftops of plant buildings or other structures within the plant premises.
  • Ground-mounted solar plants can be set up in open, shadow-free spaces within the plant premises.
  • Additionally, the roofs of car parking sheds can be effectively utilized for solar plant installations.

In general, the lifespan of the installed solar power plant extends to 25 years. In-Plant solutions are primarily characterized as Grid-Interactive solar systems. This means that the power generated by the solar plant is seamlessly integrated into the plant's energy consumption during daylight hours. Customers benefit from this arrangement by using the generated power for captive consumption, and any surplus electricity produced is exported to the grid. This ensures maximum utilization of solar energy while contributing to grid sustainability.

Choosing the Right Solar Investment Model

OPEX vs CAPEX

When investing in solar energy, businesses can choose between two financial models: OPEX (Operational Expenditure) and CAPEX (Capital Expenditure). Each model has its own advantages, depending on financial goals, investment capacity, and long-term energy needs.

OPEX Model – Pay as You Use

In the OPEX model, also known as a Power Purchase Agreement (PPA), a third-party provider installs, owns, and maintains the solar system on the business premises. The business pays only for the electricity consumed at a lower rate than traditional power sources, without any upfront investment.

Key Benefits of OPEX:

  • ▪️Zero upfront investment required.
  • ▪️Immediate savings on electricity costs.
  • ▪️No maintenance or operational responsibilities.
  • ▪️Protection from rising energy prices.
  • ▪️Sustainable and risk-free solar adoption
CAPEX Model – Own Your Solar Power System

In the CAPEX model, businesses make a one-time investment in solar infrastructure and take full ownership of the system. This approach provides long-term savings, energy independence, and tax benefits. The business is responsible for installation, maintenance, and performance management.

Key Benefits of CAPEX:

  • ▪️Full ownership of the solar system.
  • ▪️Significant long-term savings on electricity bills.
  • ▪️Eligible for tax benefits & accelerated depreciation.
  • ▪️Increased asset value and energy security.
  • ▪️No dependency on third-party providers.

Which Model is Right for You?

  • Choose OPEX if you prefer a zero-investment model with hassle-free solar adoption.
  • Choose CAPEX if you want long-term savings, full ownership, and tax benefits.

Both models help businesses transition to clean energy, reduce carbon footprints, and achieve sustainability goals. Let us help you find the best fit for your energy needs!

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