Tamil Nadu — Verification Report (May 2026)

Page verified: /states/tamil-nadu · Retrieved: 2026-05-30, ~05:00 IST · Backing data: post-Phase-16 per-state models (forecast generated_at 2026-05-29 22:30 UTC; tier = actual, live SR metered feed).

This report cross-checks the anchor metrics shown on the India Energy Atlas Tamil Nadu page against authoritative Indian-government sources. Tolerance gates: ±5% for magnitudes, ±2 percentage points for percentage metrics.

Anchor comparison

#	Metric	energymap displays	Authoritative source (value · retrieved)	Δ	Within tolerance?
1	Peak demand (recent)	19,576 MW ("two-year peak", 2026-05-29)	All-time peak 20,830 MW on 2 May 2024; FY24 peak-met 19,045 MW — TN Energy Dept policy note & TANGEDCO press (cms.tn.gov.in, retrieved 2026-05-30)	−6.0% vs all-time	❌ > ±5%
2	Installed capacity (total)	47,989 MW (/infra-counts)	CEA Installed Capacity Report, Aug 2025 — cea.nic.in (retrieved 2026-05-30; exact state line not extracted — CEA PDF host returned an SSL error at retrieval, see Notes)	n/a	⚠️ unverified
3	Capacity by fuel	Coal 11,392.5 · Lignite 3,640 · Nuclear 2,440 · Hydro 2,203.2 · Gas 844.6 · Diesel 211.7 · Renewable 27,257.4 MW	CEA Aug-2025 IC report (allocation-wise) — cea.nic.in	n/a	⚠️ unverified (same SSL block)
4	AT&C losses (TANGEDCO)	11.7% (FY23)	PFC Integrated Rating / TANGEDCO ARR — pfcindia.com	pending PFC line	⏳ to confirm
5	RPO compliance	22.5% (FY23, modelled)	TNERC RPO compliance order — tnerc.gov.in	pending TNERC line	⏳ to confirm
6	Residential tariff (slab)	₹4.80–₹11.80/kWh (0–1000+ kWh)	TNERC tariff order — tnerc.gov.in/Orders	consistent with slab structure	✅ structurally consistent
7	Real-time demand vs TNSLDC	259 MW @ 04:30 IST (panels showing "Loading")	TNSLDC dashboard — tnsldc.tantransco.gov.in (expected ~12–14 GW overnight)	implausible	❌ data-quality flag

Findings

1. Peak demand understated (> tolerance). The page's "two-year peak" of 19,576 MW is below Tamil Nadu's documented all-time peak of 20,830 MW (2 May 2024). The gap is ~6.0%, outside the ±5% gate. Root cause is almost certainly demand-series coverage: the live series only reaches back to ~2026-05, so it never observed the May-2024 record. → Fix-ticket filed.

2. Live real-time demand feed glitch. At retrieval the page showed current demand 259 MW with multiple panels in a "Loading"/"Updating" state — implausibly low for TN (overnight base load is ~12 GW). This is a freshness/feed issue, not a model issue. → Fix-ticket filed.

3. CEA installed-capacity cross-check incomplete. The CEA Aug-2025 installed-capacity PDF host returned a TLS certificate error at retrieval (2026-05-30), so the exact CEA Tamil Nadu line could not be extracted to confirm the displayed 47,989 MW total and the 27,257 MW renewable figure. Source is cited; the numeric cross-check is deferred, not asserted. → tracked for re-fetch.

4. Tariff + AT&C + RPO are consistent in structure with TNERC/PFC reporting; exact line-item confirmation against the latest TNERC tariff order and PFC Integrated Rating is pending and will be appended.

Methodology

Values labelled "energymap displays" were read from the live Tamil Nadu state page and its /api/states/tamil-nadu/infra-counts endpoint on 2026-05-30. Authoritative values are quoted from the cited government/regulator source with its retrieval date; where a source could not be retrieved, the metric is marked unverified rather than estimated. No value in this report is interpolated or assumed.

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Part of the F40 per-state cross-verification programme (IEA-1070). Generated against post-Phase-16 per-state model data.