ENTERPRISE API · RISK ANALYTICS
Forward curtailment and capture rate at substation resolution, P50 and P90.
Curtailment is the largest unpriced risk in Indian renewables. Karnataka curtailed solar materially through FY24, Tamil Nadu wind through monsoon, Rajasthan transmission-driven cuts. PPA tariffs are still bid as if curtailment is zero. As BESS arrives, the question shifts from will I be curtailed to what is my forward capture rate at substation X in 2028 given queue depth and ISTS constraints — and no one answers it quantitatively in India today. This API does. Production-cost dispatch, queue-depth-aware capture rates, methodology versioning on every response.
WHAT IT DOES
Three jobs, one contract
Curtailment forecast by node, P50 and P90
Annual curtailment percentage for a substation or pooling station, with the hourly shape and the dominant drivers — transmission-bound, ramp-bound, or oversupply.
Forward capture rate as a distribution
The India version of the cannibalisation curve standard in PJM and CAISO analytics. For technology T at node N in year Y, return a distribution of capture rates with explicit dependence on incremental same-technology capacity entering the region.
Bid-time, curtailment-adjusted tariff
Send a tariff, a technology, a node, and a horizon. Receive the curtailment-adjusted IRR and the implied tariff-floor at which the project clears credit committee.
WHY NOW
The window
PPAs are 25-year instruments. Curtailment is the hidden P&L line every IPP and lender is starting to discover the hard way. PFC, REC, IREDA and the foreign DFIs are beginning to ask explicitly. SECI's recent BESS rounds priced curtailment risk implicitly through hybrid tariff structures. The CCTS rollout and tightening RPO compliance will surface curtailment risk explicitly across every new bid.
SAMPLE
See the call
A pooling station in Bhadla, returning a CY28 curtailment forecast of 11 percent at P50 and 18 percent at P90, with the forward capture rate falling from 0.91 in CY26 to 0.78 in CY30 as queued solar enters the region.
curl https://api.energymap.in/v1/curtailment/forecast/node-Bhadla-PS1 \
-H 'X-API-Key: $KEY'{
"node": "node-Bhadla-PS1",
"annual": [
{ "year": 2026, "curtailment_pct": { "p50": 0.04, "p90": 0.07 } },
{ "year": 2027, "curtailment_pct": { "p50": 0.06, "p90": 0.10 } },
{ "year": 2028, "curtailment_pct": { "p50": 0.11, "p90": 0.18 } }
],
"drivers": ["transmission_bound", "ramp_bound"],
"methodology_version": "ccr-v0.3"
}ENDPOINTS
Five paths
| Method | Path | Returns |
|---|---|---|
| GET | /v1/curtailment/forecast/{node} | Annual curtailment with hourly shape and drivers |
| POST | /v1/capture-rate/forward | Capture-rate distribution by node, technology, horizon |
| POST | /v1/portfolio/cannibalisation | Portfolio-level cannibalisation curve |
| GET | /v1/dispatch/risk-screen/{region} | Near-term curtailment alerts for operating assets |
| POST | /v1/bid/curtailment-adjusted-tariff | Bid-stage IRR after applying capture-rate distribution |
WHO IT IS FOR
Buyers
IPPs
ReNew · Adani Green · Tata Power Renewables · Greenko · JSW Energy · Azure · Acme
Replace the assumption you currently borrow from a CAISO paper.
BESS developers
JSW Neo · Tata Power · ReNew Battery · Greenko · Serentica · Hero Future Energies
A revenue-stack base case that survives credit committee.
Project finance lenders
PFC · REC · IREDA · IFC · ADB · KfW · JBIC
Independent curtailment view to triangulate against the borrower's deck.
Climate-finance investors
BlackRock · BII · GIP · Brookfield
Portfolio cannibalisation across multiple regions in one query.
Energy traders
Manikaran · PTC · Tata Power Trading · Reliance Power
A forward price curve that respects transmission.
ACCESS
Free tier and paid plans cover this dataset. Limits and what is included on each plan live in one place: energymap.in/pricing. For DISCOM partnerships or custom geographies, email hello@energymap.in.
SOURCE: ISTS/InSTS topology + RE queue + dispatch simulation · UPDATED quarterly with methodology_version on every response · COVERAGE all-India · METHOD derived
NEXT STEP
Build against the contract
The endpoints are on the roadmap and the contract is published. Read the reference, plan your integration, and reserve Enterprise access.