Green Energy Open Access (GEOA) is rapidly transforming how commercial and industrial consumers in India procure electricity. With supportive regulations from the Ministry of Power and policy oversight by the Central Electricity Regulatory Commission, businesses are increasingly sourcing renewable power from resource-rich states like Gujarat to high-demand industrial regions such as Haryana.
This blog explains in detail how to calculate Green Energy Open Access charges for an inter-state renewable energy procurement scenario from Gujarat to Haryana.
Inter-State Green Energy Open Access Cost Calculator (Gujarat to Haryana)
• ISTS waiver assumed for eligible renewable projects.
• Haryana open access charges vary based on voltage and consumer category.
• This calculator is only for representation and estimation purposes.
Understanding the Scenario
Let us assume the following:
- Source State: Gujarat
- Consumer State: Haryana
- Connected Load: 100 MW
- Monthly Energy Procurement: 3,00,000 units
- PPA Tariff: ₹3.40 per kWh
- Renewable Source: Solar
- Consumer Category: Commercial and Industrial
- Procurement Model: Third-party Green Open Access
Why Gujarat to Haryana Renewable Procurement is Growing
Gujarat is one of India’s leading renewable energy hubs due to:
- High solar and wind potential
- Strong infrastructure
- Competitive tariffs
- Availability of large-scale projects
Haryana, on the other hand, has:
- High industrial demand
- Increasing power tariffs
- Sustainability commitments by large corporations
Inter-state procurement allows Haryana consumers to reduce costs and meet ESG goals.
Step 1: Power Purchase Agreement (PPA) Cost
The PPA tariff is the base cost of electricity.
In this example:
- PPA tariff = ₹3.40 per kWh
- Monthly scheduled energy = 3,00,000 units
This is usually fixed for 10–25 years and protects consumers from future price fluctuations.
Step 2: Inter-State Transmission System (ISTS) Charges
The Government of India offers ISTS charge waivers for eligible renewable projects. If the Gujarat project qualifies:
- ISTS transmission charges = Zero
If the project is not eligible, ISTS charges may range from ₹0.10 to ₹0.50 per kWh.
This waiver significantly improves cost competitiveness.
Step 3: Inter-State Transmission Losses
Energy losses occur during long-distance transmission through the national grid operated by Power System Operation Corporation.
Typical ISTS loss range:
- 2% to 4%
Assuming:
- ISTS loss = 3%
Delivered energy:
- 3,00,000 × (1 – 0.03)
- Delivered energy = 2,91,000 units
Step 4: State Transmission Charges in Haryana
After reaching Haryana, the electricity passes through the state transmission network.
Typical range:
- ₹0.25 to ₹0.60 per kWh
Assuming:
- ₹0.35 per kWh
Higher voltage consumers generally pay lower charges.
Step 5: Wheeling Charges in Haryana
These charges apply when electricity moves through distribution lines.
Typical range:
- ₹0.40 to ₹1.20 per kWh
Assuming:
- ₹0.75 per kWh
Step 6: Cross Subsidy Surcharge (CSS)
CSS compensates DISCOMs for revenue loss when consumers move to open access.
Typical range in Haryana:
- ₹1.8 to ₹2.5 per kWh
Assuming:
- ₹2.20 per kWh
The Green Open Access Rules aim to reduce CSS over time.
Step 7: Additional Surcharge
This is applied to recover stranded distribution infrastructure costs.
Typical range:
- ₹0.40 to ₹1.00 per kWh
Assuming:
- ₹0.60 per kWh
Some renewable projects receive exemptions.
Step 8: Scheduling and System Operation Charges
Charges payable for scheduling, grid balancing, and system management.
Typical range:
- ₹0.02 to ₹0.10 per kWh
Assuming:
- ₹0.05 per kWh.
Step 9: Banking Charges (if applicable)
Banking allows adjustment of surplus energy across months. For simplicity, this example assumes no banking.
Important Disclaimer
This calculation example is only for representation and educational purposes. Actual Green Energy Open Access charges vary based on regulatory approvals, project eligibility, voltage level, consumer category, and periodic tariff revisions.
Step-by-Step Cost Calculation Example
Delivered Energy
Scheduled energy = 3,00,000 units
After ISTS loss of 3%:
Delivered energy = 2,91,000 units
Landed Cost Components
| Component | Cost (₹/kWh) |
|---|---|
| PPA Tariff | 3.40 |
| Haryana Transmission | 0.35 |
| Wheeling | 0.75 |
| CSS | 2.20 |
| Additional Surcharge | 0.60 |
| Scheduling & SLDC | 0.05 |
Total Landed Cost = ₹7.35 per kWh
Monthly Power Cost
2,91,000 × 7.35
= ₹21.39 lakh approximately.
Step 10: Compare with Haryana DISCOM Tariff
If the industrial tariff in Haryana is:
- ₹9 to ₹10 per kWh → Strong savings
- ₹8 per kWh → Captive or hybrid renewable structures may be more suitable.
Key Strategies to Reduce Costs
- Captive renewable structure
- Solar and wind hybrid procurement
- Storage integration
- High voltage connectivity
- Long-term contracts
- Aggregated corporate PPAs
- Load factor optimization
- Time-of-day scheduling
- Policy incentives
- ISTS waiver eligibility.
Future Trends in Haryana Renewable Procurement
The shift toward renewable energy in Haryana is accelerating due to:
- Net-zero commitments
- Corporate sustainability targets
- Electrification of industries
- Flexible procurement through exchanges like Indian Energy Exchange
- Storage and round-the-clock renewable energy.
Conclusion
For a 100 MW connected load consumer in Haryana, sourcing renewable energy from Gujarat at ₹3.40 per kWh offers strong cost savings and sustainability benefits. With supportive policies and transmission waivers, inter-state green open access will continue to play a major role in India’s clean energy transition.
