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January 15, 2026

Renewable Energy Open Access: STOA, MTOA & LTOA

With the growing demand for renewable energy in India, many industries and businesses are shifting to Open Access power. Open Access allows consumers to buy electricity directly from solar or wind power plants instead of relying only on DISCOMs.
Open Access helps businesses reduce electricity costs and meet their sustainability goals.



There are three main types of Open Access:

  • STOA (Short-Term Open Access)
  • MTOA (Medium-Term Open Access)
  • LTOA (Long-Term Open Access)
Let’s understand them in simple terms.

What is Open Access in Renewable Energy?



Open Access is a system where large electricity users can purchase power directly from renewable energy producers using existing transmission and distribution networks.

Benefits of Open Access:
  • Lower electricity cost
  • Clean and green energy
  • Stable power supply
  • Supports ESG and sustainability goals
STOA – Short-Term Open Access


STOA is used when power is needed for a short period.
Key Points:
  • Duration: Up to 1 year
  • High flexibility
  • Quick approval
  • Best for short-term or seasonal needs
Suitable For:
  • First-time renewable energy users
  • Seasonal industries
  • Temporary power requirements
MTOA – Medium-Term Open Access


MTOA
is suitable for businesses with steady power needs for a few years.
Key Points:
  • Duration: 1 to 5 years
  • Medium flexibility
  • Better cost control than STOA
Suitable For:
  • Manufacturing units
  • Commercial buildings
  • Businesses planning stable operations
LTOA – Long-Term Open Access

 

LTOA is best for long-term renewable energy planning.
Key Points:
  • Duration: More than 5 years
  • High cost stability
  • Long-term agreements
Suitable For:
  • Large industries
  • Data centers
  • Companies aiming for 100% renewable energy
How to Choose the Right Open Access Type?


The right Open Access option depends on:
  • Your electricity usage
  • Budget planning
  • Business growth plans
  • Renewable energy goals
Choosing the correct Open Access model helps reduce costs and ensures long-term energy benefits.
Conclusion


Renewable Energy Open Access is a smart solution for businesses looking to reduce power costs and adopt clean energy. Whether you choose STOA, MTOA, or LTOA, Open Access offers flexibility, savings, and sustainability.

With the right planning, Open Access can be a key step towards a greener and more energy-efficient future.
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