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STU connectivity & evacuation approval — documents, timeline & process
R1 · Pre-development approvals · ~75 days (indicative)
For projects connecting within one state's grid — connectivity approval from the state transmission utility, with different forms, charges and bank guarantees in every state.
Application to the STU, feasibility/system study, preliminary approval, charges and BGs, final approval and connectivity agreement.
Solar PV (ground-mounted)WindHybrid (solar + wind)Standalone BESS
Statutory basis & authority
| Statutory basis | State ERC transmission open access / connectivity regulations |
|---|---|
| Authority | State transmission utility (STU) |
| Department | State transmission utility |
| Indicative timeline | ~75 days (verify with the authority) |
| Fees | State-notified application fee + connectivity charges/BGs |
Documents required
- Connectivity application (state format)
- Project details and single-line diagram
- Land/site details
- Connectivity charges and voltage-linked BGs as applicable
When is this required?
- STU connectivity: Project type: Solar PV (ground-mounted) / Wind / Hybrid (solar + wind) / Standalone BESS; Connectivity level: STU (intra-state)
State-specific notes
Maharashtra — MSETCL
States: Maharashtra
Authority: MSETCL / Mahatransco (portal mahastu.in; MSEDCL for 11–33 kV)
Basis: MERC Transmission Open Access Regulations 2016 + Mahatransco revised RE-connectivity procedure
Indicative timeline: ~75 days
Rajasthan — RVPN
States: Rajasthan
Authority: RVPN(L) — Rajasthan Rajya Vidyut Prasaran Nigam
Basis: RERC-approved connectivity procedure effective 01-Feb-2026 (≥33 kV)
Indicative timeline: ~75 days
Gujarat — GETCO
States: Gujarat
Authority: GETCO (Gujarat Energy Transmission Corporation)
Basis: GERC Detailed Procedure (Jan-2023) + Order 1 of 2024 (hybrid) + 2025 amendments
Indicative timeline: ~80 days
Karnataka — KPTCL
States: Karnataka
Authority: KPTCL (transmission) / ESCOMs (distribution)
Basis: KERC OA Regulations 2025 + RE Policy 2022–27; KERC draft Connectivity & GNA Regulations 2026 (proposed effective 01-Oct-2026) ⚑
Indicative timeline: ~60 days
Uttar Pradesh — UPPTCL
States: Uttar Pradesh
Authority: UPPTCL (Uttar Pradesh Power Transmission Corporation)
Basis: UPERC Connectivity Regulations 2010 + amendments; UPPTCL Procedure 2013
Indicative timeline: ~45 days
Madhya Pradesh — MPPTCL ⚑
States: Madhya Pradesh
Authority: MPPTCL (Madhya Pradesh Power Transmission Company, Jabalpur)
Basis: MP Electricity Grid Code Revision-III 2024 (Connection Code) + MPERC Intra-State OA Regulations 2021 (6th Amdt Feb-2026)
Indicative timeline: ~75 days
Chhattisgarh — CSPTCL ⚑
States: Chhattisgarh
Authority: CSPTCL (Chhattisgarh State Power Transmission Company, Raipur)
Basis: CSERC (Connectivity and Intra-State Open Access) Regulations 2011 + amendments; Third Amendment draft Jan-2026 (GEOA alignment) ⚑
Indicative timeline: ~75 days
Andhra Pradesh — APTRANSCO ⚑
States: Andhra Pradesh
Authority: APTRANSCO (STU) + discoms ≤33 kV
Basis: AP Grid Code + APERC GEOA Regulation 3 of 2024; APERC clarificatory order Jun-2026
Indicative timeline: ~90 days
Tamil Nadu — TANTRANSCO ⚑
States: Tamil Nadu
Authority: TANTRANSCO (Tamil Nadu Transmission Corporation)
Basis: TNERC Grid Connectivity & Intra-State Open Access Regulations 2014 (Reg 43 procedure, multiple amendments)
Indicative timeline: ~75 days
Haryana — HVPNL ⚑
States: Haryana
Authority: HVPNL (Haryana Vidyut Prasaran Nigam — STU + nodal for connectivity & green OA)
Basis: HERC GEOA Regulations 2023 (Apr-2023) + 1st Amendment (Mar-2025); HVPNL detailed procedure
Indicative timeline: ~45 days
Punjab — PSTCL ⚑
States: Punjab
Authority: PSTCL (Punjab State Transmission Corporation); PSPCL for distribution level
Basis: PSERC Intra-State OA Regulations 2011 (12th/13th Amendments) + PSPCL Detailed Procedure for Grant of Connectivity (03-Apr-2024)
Indicative timeline: ~75 days
Solarian expert note
Process, portal and BG regime differ sharply by state — verify the current state procedure before applying. ⚑
Frequently asked questions
What is STU connectivity & evacuation approval?
For projects connecting within one state's grid — connectivity approval from the state transmission utility, with different forms, charges and bank guarantees in every state.
How long does STU connectivity & evacuation approval take?
Around 75 days as an indicative planning figure. Actual timelines vary by authority workload and application quality — verify with the concerned authority.
Which authority grants STU connectivity & evacuation approval?
State transmission utility (STU). Department: State transmission utility.
What documents are required for STU connectivity & evacuation approval?
Connectivity application (state format); Project details and single-line diagram; Land/site details; Connectivity charges and voltage-linked BGs as applicable.
When is STU connectivity & evacuation approval required?
Project type: Solar PV (ground-mounted) / Wind / Hybrid (solar + wind) / Standalone BESS; Connectivity level: STU (intra-state).
Related approvals in this phase
- ISTS connectivity & GNA (General Network Access)
- Discom feasibility approval & registration
- Net-metering / interconnection agreement
- Section 68 prior approval (overhead lines)
See also: all approvals · glossary of terms · state roadmaps
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Indicative guidance from the RegNav knowledge base, expert-verified by Solarian. Not legal advice — always verify with the concerned authority.