A co-located battery has no deviation category
Named in none of the three categories the deviation rules set out.
Read the entry →The commencement date has passed. The rules have not.
Proposed to start on 1 October 2026. Still a draft.
Read the entry →Two hours of storage, with no end date
Four hours runs to 30 June 2031. Two hours carries no end date.
Read the entry →Reports
Free · open to correction
Tamil Nadu: the most valuable banked unit in the index, and a battery with no home
What a banked renewable unit is worth in Tamil Nadu for FY 2026-27, checked against real bills — and why the State has not yet decided which rules a co-located battery falls under.
India Renewable Banking Index
What a banked renewable unit is actually worth in Karnataka, Gujarat and Andhra Pradesh — the charge, the slot it may be drawn in, the cap, the date the entitlement ends, and the tariff route that decides the value. Six reference consumers, each figure taken from the primary instrument.
Karnataka Storage Decision Brief
Banking, General Network Access and BESS economics under KERC's draft Regulations of June 2026 — the ninety-day window, the slot restriction on banking, and when a battery is actually worth buying.
Work and contributions
Filings and records
Comments filed with the Central Electricity Authority
On the draft requirement that new solar and wind plants carry co-located storage — and the State rules that same asset will be commissioned into, where it can be given a deviation band of Nil while wind gets ten per cent and solar five.
Send a billing record
A tariff order says what a charge is. It rarely says what the charge is levied on. One redacted bill with non-zero open-access units settles a question no order answers — and nothing identifying is ever published.
Contact
Corrections, questions, and requests for a project-specific calculation.