Nautilus Heavy Storage
256.24 MW storage in San Patricio, TX · In queue since December 2023 · Proposed COD January 2030
256.24 MW
Capacity
1
Components
Battery
2y 7m
In Queue
Facility Study
IA Phase
COD target: 2030
Total Duration
6y 1m
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 not yet executed
Typical: 30–60 days (negotiation)
Proposed COD: 2030-01-30
The Nautilus Heavy Storage project is a proposed 256.24 MW battery storage project located in San Patricio County, Texas. Developed by Nautilus Heavy Storage, LLC, the project is currently active in the ERCOT interconnection queue as entry ERCOT-26INR0306, with a queue entry date of December 20, 2023. The proposed commercial operation date is January 30, 2030, and the project's interconnection agreement status is currently in the Facility Study phase.
The project consists entirely of battery storage, with a total capacity of 256.24 MW. The point of interconnection is the 8422 Dupont 138kV location. The Nautilus Heavy Storage project has appeared in recent news coverage regarding energy storage developments in Texas.
Generated from interconnection queue and public data sources
Realization risk before commercial operation — cluster-study clearance, IA timing, counterparty mix, and withdrawal probability vs cohort. The diligence view that determines whether this project is worth pursuing. Powered by InfraSure's development-stage modeling stack.
See the full development-risk decomposition for this project.
State
TX
County
San Patricio
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
Nautilus Heavy Storage, LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
8422 Dupont 138kV
Data Source
LBNL + Live
Composite operating-phase risk view — what this asset's risk profile would look like once it reaches commercial operation. 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 — what this project would produce assuming it reaches commercial operation. Probabilistic ranges (P10/P50/P90) across weather, demand, and policy scenarios, conditioned on the proposed COD. 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. The bankability view that determines whether the deal clears its covenants once online. 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
- Nearest Node (Estimated)
- LGE_CC1
- POI Substation
- Dupont Switching Station
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 Nautilus Heavy StorageForward forecasts, scenario decomposition, and risk-decision tooling for this queue project.
