In today high-pressure industrial society, managing cost may not be a luxury but a necessity in the running of the operations without power interruption. The electricity tariffs continue to rise as do the environmental regulations, and thus solar energy is one of the solutions to the industries and has become a long-term cost-effective solution.
There are two common business models of solar adoption that lead the discussion namely OPEX (EPC) and RESCO (IPP). There are good reasons to choose either, yet one thing is to understand clearly, that enabling you to make a profitable decision in your industry.
1. Understanding the OPEX Model (EPC Approach)
A pay-as-you-go form of contract is the OPEX model, typically an Engineering, Procurement, and Construction (EPC) contract.
Here’s how it works:
- A solar developer (like GRE) sets up the plant for you.
- You only pay for the energy you consume, not the entire project cost upfront.
- The ownership of the system can eventually be transferred to you after the contract period.
Benefits of OPEX for Industries:
- Zero upfront investment – immediate cost savings without capital expenditure.
- Operational risk handled by GRE – you focus on your core business while we manage the plant.
- Flexible contracts – tailored to your production needs and power consumption.
2. Understanding the RESCO Model (IPP Approach)
The Independent Power Producer (IPP) model, which is also referred to as the Renewable Energy Service Company (RESCO) model is suitable to industries that want to engage in long term power purchase agreements (PPA) without getting into the ownership hassle of the system.
In this model:
- GRE owns and operates the solar system entirely.
- You agree to purchase the generated electricity at a pre-decided tariff for a fixed term (usually 15–25 years).
Benefits of RESCO for Industries:
- No maintenance responsibilities – GRE ensures maximum plant uptime.
- Fixed tariff advantage – protect against rising grid electricity rates.
- Long-term sustainability commitment – align with ESG goals and CSR compliance.
3. Key Differences Between OPEX and RESCO
| Feature | OPEX Model (EPC) | RESCO Model (IPP) |
| Ownership | Customer after contract period | Developer (GRE) |
| Upfront Cost | Zero or minimal | Zero |
| Tariff Structure | Pay for energy consumed | Fixed PPA tariff |
| O&M Responsibility | Developer initially | Developer entirely |
| Best For | Medium-term projects | Long-term energy stability |
4. Which Model Should You Choose?
The choice depends on:
- Contract flexibility – Short-term vs. long-term commitment.
- Capital investment readiness – Whether you want to own the asset.
- Operational preferences – Willingness to manage O&M or outsource completely.
GRE’s consultants can help you evaluate your industry’s exact energy needs, run ROI calculations, and recommend the model that offers the highest savings.
5. Why GRE Is the Right Partner
GRE Renew Enertech Limited offers turnkey EPC experience and best in class technology with an excellent track record of operation with both OPEX and RESCO model. Whether it is the rooftops of large industries or the vast solar parks, we helped an industry cut its electricity payments to zero with guaranteed consistency.
Conclusion
Moving toward solar is no longer an environmental option, it is a business decision. The aim is doing the same and equally in both OPEX and RESCO that is, maximize savings, minimize risk and guarantee uninterrupted green power. Find out more by contacting GRE Renew Enertech Limited today and see what model would best suit your industrial energy policy and embark on your zero-electricity bill future.