Carambola BESS
100.9 MW storage in Hidalgo, TX · In queue since October 2022 · Proposed COD May 2026
100.9 MW
Capacity
1
Components
Battery
3y 9m
In Queue
IA Executed
IA Phase
Signed Jul 2023
Queue → IA
9 months
IA → COD
2y 10m
Total Duration
9 months
Schedule
2 months past proposed COD
Interconnection request submitted to ISO/RTO
ERCOT uses a serial "connect and manage" approach — fastest among major ISOs.
Typical: 18–30 months (fastest major ISO)
Interconnection agreement executed — binding commitment to build
Typical: 30–60 days (negotiation)
Project under construction
Typical: 6–18 months
Proposed COD: 2026-05-18
The Carambola BESS project is a proposed 97.43 MW battery storage project located in Hidalgo County, Texas. The developer is SMT McAllen II LLC. It is interconnected within the ERCOT region under queue ID ERCOT-24INR0436, with an interconnection queue entry date of October 18, 2022, and a proposed commercial operation date of April 20, 2026. The project's Interconnection Agreement (IA) was executed on July 31, 2023.
The point of interconnection (POI) is the North Mcallen 138 kV Substation. The Carambola BESS project has been the subject of recent news coverage.
Generated from interconnection queue and public data sources
Realization risk from now to commercial operation — financing close, EPC and tax-equity counterparty mix, and COD probability vs the proposed date. The diligence view that determines whether the deal actually closes. Powered by InfraSure's development-stage modeling stack.
See the full development-risk decomposition for this project.
State
TX
County
Hidalgo
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
SMT McAllen II LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
North Mcallen 138 kV Substation (N_MCALLN, Bus#8632)
Data Source
LBNL + Live
Composite operating-phase risk view — what this asset's risk profile will look like once it commissions. Climate hazards across its operating life, expected generation variability, and offtake counterparty exposure, decomposed into a single decision-grade score. Powered by InfraRisk.
See the full risk decomposition + scenarios for this project.
Forward generation outlook — first-year production estimate and 10-year P50 trajectory, with probabilistic ranges (P10/P50/P90) across weather, demand, and policy scenarios. Powered by InfraSure's generation modeling stack.
See the full forecast + scenario decomposition for this project.
Forward revenue, DSCR projection, and financing-close risk — conditioned on commercial operation. First-year DSCR, 10-year cashflow, and counterparty exposure across price and policy scenarios. Powered by InfraSure's asset cashflow stack.
See the full revenue + DSCR projection for this project.
- ISO / RTO
- ERCOT
- Trading Hub
- HB_SOUTH
- Hub Confidence
- MEDIUM
- POI Substation
- North Substation
This project's market context is estimated from its Point of Interconnection. Hub and node assignments are approximate and based on geographic inference from the POI substation name.
No Ask reports yet for this entity.
Ask about Carambola BESSForward forecasts, scenario decomposition, and risk-decision tooling for this queue project.
