Surplus; G291 (MISO-S1064) — Project Summary

Queue ID
MISO-S1064
Capacity
21 MW
Technology
Battery
Status
active
Location
Region
MISO
Developer
IA Status

Surplus; G291

MISO-S1064BetaActiveOtherBatteryMISOLBNL + Live

21 MW hybrid in · In queue since September 2024 · Proposed COD November 2026

ISO/RTO: MISO

21 MW

Capacity

1

Components

Other

1y 10m

In Queue

IA Status

COD target: 2026

Interconnection

Total Duration

2y 2m

Pre-Study0%
Queue EntrySep 6, 2024

Interconnection request submitted to ISO/RTO

DPP Study

MISO uses the Definitive Planning Phase (DPP) process with 3 study phases.

Typical: 30–40 months (historical); 12 months target

Interconnection Agreement

Interconnection agreement not yet executed

Typical: 30–60 days (negotiation)

Commercial Operation

Proposed COD: 2026-11-01

About

The Surplus; G291 development project is a proposed 21 MW hybrid energy project consisting of a 21 MW "Other" technology paired with a battery. It is located within the Otter Tail Power Company service area. The project is listed in the Midcontinent Independent System Operator (MISO) interconnection queue as project S1064, with a queue entry date of September 6, 2024, and a proposed commercial operation date of November 1, 2026.

The project is currently in the active phase of the interconnection queue process. The point of interconnection (POI) is at EDGE SS9 41.6 kV.

Generated from interconnection queue and public data sources

Development Risk

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.

Available on the InfraSure platform

See the full development-risk decomposition for this project.

P(COD by stated date)
Withdrawal probability vs cohort
IA cluster risk
Project Details

State

County

Grid Region

MISO (Midcontinent)

Market

ISO/RTO Member

Developer

Utility

OTTER TAIL POWER COMPANY

Entity

MISO

Service Type

Point of Interconnection

EDGE SS9 41.6 kV

Data Source

LBNL + Live

Risk Analytics

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.

Available on the InfraSure platform

See the full risk decomposition + scenarios for this project.

Climate hazards (8+)
Generation variability (P10/P50/P90)
Offtake + transmission counterparty
Generation Forecast

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.

Available on the InfraSure platform

See the full forecast + scenario decomposition for this project.

P50 conditioned on COD
Capacity factor vs cohort
Weather + policy scenarios
Financial Forecast

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.

Available on the InfraSure platform

See the full revenue + DSCR projection for this project.

Revenue conditioned on COD
Financing close risk
Cohort DSCR comparison
Market Context
Approximate
ISO / RTO
MISO
Hub Confidence
UNKNOWN

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.

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Forward forecasts, scenario decomposition, and risk-decision tooling for this queue project.