ENTERPRISE API · DISTRIBUTION
Dynamic hosting capacity for any distribution transformer in India — physics-informed, AMI-fed.
The low-voltage distribution network is India's biggest data blind spot. DISCOMs are approving rooftop solar and EV charging connections without knowing the actual thermal limits of local distribution transformers. Result: nuisance tripping, equipment failure, and weeks of back-and-forth between DISCOMs, installers, and CPOs. The Distribution Transformer Stress API replaces static "10 kW solar limit" rules with a dynamic envelope — fed by AMI smart-meter time-series, irradiance, EV load forecasts, and a physics-informed thermal model of the DT itself.
WHAT IT DOES
Three jobs, one contract
Dynamic envelope, not a static cap
Send a DT identifier and a list of proposed additions (kW, type, schedule). Receive an envelope by 15-minute block: maximum export, maximum import, and a confidence value reflecting AMI coverage on that DT.
Site-screen for EV charging and rooftop solar
Send a coordinate, a station size, and a dwell pattern. Receive a ranked list of nearby DTs with available time windows. Send a rooftop sanction request, get a recommendation — approve, approve with curtailment, decline, or defer to DERMS.
Data quality declared on every response
Every output declares its data quality tier — ami-direct, ami-imputed, or modelled-only — and the AMI coverage percent for the underlying DT. No silent extrapolation.
WHY NOW
The window
The Smart Meter National Programme is finally generating the AMI data this product needs, with 200 million-plus meters targeted. The EV charging boom and PM Surya Ghar (rooftop solar at scale) are simultaneously hitting the same LV network with no coordination. DISCOMs are looking to defer capex; CPOs are losing months to siting back-and-forth. A dynamic answer collapses both timelines.
SAMPLE
See the call
A BluSmart fast-charging station near Cyber City Gurugram, asking the API whether five trucks can charge at 60 kW each between 23:00 and 05:00 against the local DT, and receiving a yes with a recommended window and the load-profile evidence behind it.
curl -X POST https://api.energymap.in/v1/dt/hosting-capacity \
-H 'X-API-Key: $KEY' \
-H 'Content-Type: application/json' \
-d '{
"dt_id": "dt-BESCOM-29481",
"additions": [
{ "type": "ev", "kw": 300, "schedule": "23:00-05:00" }
]
}'{
"dt_id": "dt-BESCOM-29481",
"data_quality": "ami-direct",
"ami_coverage_pct": 0.94,
"envelope": [
{ "block_start_ist": "23:00", "max_import_kw": 360, "max_export_kw": 0, "confidence": 0.91 },
{ "block_start_ist": "23:15", "max_import_kw": 355, "max_export_kw": 0, "confidence": 0.91 }
],
"recommendation": "approve",
"notes": "Local DT thermal headroom across 23:00-05:00 supports the proposed 300 kW additions."
}ENDPOINTS
Five paths
| Method | Path | Returns |
|---|---|---|
| POST | /v1/dt/hosting-capacity | Dynamic envelope by 15-min block for a DT and proposed additions |
| POST | /v1/feeder/stress | Thermal and voltage stress probability for a feeder under a scenario |
| POST | /v1/ev/site-screen | Ranked DT candidates for an EV charging site, with timing windows |
| POST | /v1/rooftop/sanction-check | Reverse-power-flow risk and sanction recommendation |
| GET | /v1/dt/{id}/load-profile | 15-min average load profile, last 30 days, with AMI coverage flag |
WHO IT IS FOR
Buyers
EV charging operators
Tata Power EZ · Statiq · ChargeZone · Glida · Lithium Urban
Save the six to ten weeks per site lost to DISCOM back-and-forth.
DISCOMs
BRPL · Adani Electricity · Tata Power Mumbai · BESCOM · MSEDCL · TPDDL
Capex deferral evidence and a sanction workflow that survives audit.
Rooftop solar integrators
Tata Power Solar · Sunsure · Loom Solar · Orb Energy
Approve the customers a static rule would have lost.
EV fleet operators
BluSmart · Lithium Urban · Sun Mobility
Depot siting decisions against real DT capacity, not nameplate.
SLDCs and STUs
NRLDC · WRLDC · SRLDC · ERLDC · NERLDC
Distribution-level visibility for transmission-only operators.
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: AMI smart-meter time-series + irradiance + EV load forecasts + physics-informed DT thermal model · UPDATED on AMI cadence · COVERAGE DISCOM-partner dependent · 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.