MERC dismisses AEML-D's review petition challenging InSTS MYT Order dated 28 March 2025; finds no error apparent, true-up credits already given effect
Case of Adani Electricity Mumbai Ltd. - Distribution Business (AEML-D) seeking review of the Commission’s Intra-State Transmission System (InSTS) Multi-Year Tariff Order dated 28 March 2025 in Case No. 208 of 2024.
AEML-D sought review of MERC's 28 March 2025 InSTS MYT true-up Order (Case 208/2024), alleging two errors: (a) approved true-up credits of Rs 40.65 Cr (FY20-21) and Rs 44.18 Cr (FY21-22) were not factored into AEML-D's FY2023-24 TTSC true-up, and (b) STTC was socialised/pooled across TSUs in a manner allegedly inconsistent with Regulation 66 of MYT Regulations 2019. AEML-D sought modification of the Order and pass-through of resulting relief via PPCA in FY2025-26. TPC-D supported similar contentions (claiming Rs 34.31 Cr impact); STU opposed, saying methodology was consistent with past orders and the matter was already before the Grid Coordination Committee.
- Review Petition in Case No. 98 of 2025 dismissed in entirety - no relief granted to AEML-D or TPC-D
- Held true-up credits of Rs 84.83 Cr (Rs 40.65 Cr + Rs 44.18 Cr) for FY2020-21 and FY2021-22 were already given effect in the impugned Order's TTSC computation for FY2023-24
- Increase in AEML-D's TTSC share from Rs 490.65 Cr to Rs 579.31 Cr was due to rise in AEML-D's actual Base TCR share (5.93% to 5.97%) and reallocation of MSEDCL's reduced share (Rs 233.52 Cr) among remaining TSUs, not omission of true-up credits
- Upheld socialisation/pooling of Short-Term Transmission Charges (STTC) among all TSUs as consistent with Regulation 66 of MYT Regulations 2019, Case No. 52 of 2020, and the prior MTR Order (Case 239 of 2022)
- Rejected AEML-D's argument that STTC must be computed independently per TSU, noting non-availability of 15-minute PoA billing data from AEML-D/TPC-D justified applying unadjusted Base TCR
- Found no new facts or error apparent on the face of record; review cannot be used to re-agitate already-decided issues
- No further compliance directed - Review Petition dismissed; impugned Order dated 28 March 2025 stands as-is
- STU to continue coordinating with TSUs and SLDC on uniform data-sharing mechanism for 15-minute PoA billing demand via Grid Coordination Committee (GCC), as already initiated
- No pass-through of additional relief via PPCA mechanism for FY2025-26 as AEML-D had sought
- AEML-D/TPC-D may pursue appellate remedy (e.g., APTEL) if aggrieved, as review avenue before MERC is now closed on these two issues
- Existing true-up mechanism (inter-se, zero-sum among TSUs) to continue being applied in future InSTS tariff true-ups
- • No change in InSTS transmission charges for AEML-D-connected consumers, open-access users and embedded developers (e.g. Mindspace, Gigaplex, EON SEZs, JNPA) - approved FY2023-24/24-25 TTSC shares remain final
- • Confirms that transmission cost allocation among distribution licensees/open-access users is a zero-sum, inter-se adjusted pool - C&I open-access consumers should expect continued cross-subsidisation effects when other licensees' demand deviates from projections
- • STTC/pooling methodology precedent reinforced - large C&I/open-access users exceeding contracted Base TCR should budget for socialised STTC exposure rather than individually-computed charges
- • Signals MERC's reluctance to reopen MYT true-up computations via review; C&I stakeholders should raise data/methodology concerns during the public consultation stage of MYT proceedings itself, not post-facto
This is largely a housekeeping dismissal confirming that the Commission's cross-TSU, zero-sum true-up and STTC-socialisation methodology stays intact - no tariff impact for end consumers. For C&I/open-access developers connected via AEML-D or TPC-D networks, the key takeaway is procedural: substantive objections to demand-projection or charge-allocation methodology must be raised during the MYT/tariff consultation stage, since MERC has now twice (in the impugned Order and in this review) held that review cannot reopen settled computations absent a genuine error or new evidence. Track the pending GCC discussion on 15-minute PoA billing data, as its outcome could alter future STTC allocation for AEML-D/TPC-D-linked consumers.
Growthifye does not take responsibility for the accuracy of this information. Values are compiled from tariff orders published on the websites of State Electricity Regulatory Commissions and distribution licensees (plus CEA / MoP / Grid-India), parsed automatically and shown with their source. Always verify against the signed order before any commercial decision. This one-pager is a Vidura-assisted summary of the official order; the signed order prevails.