Decorah Battery — Plant Summary
- EIA Plant ID
- 64375
- Capacity
- 2.5 MW
- Primary Fuel
- Battery Storage
- Technology
- Batteries
- Status
- Operating
- Location
- Winneshiek, IA
- Operating Since
- 2021
- Generators
- 1
- Operator
- Interstate Power and Light Co
- Parent Company
- Alliant Energy
- Annual Generation
- -88 MWh
- Capacity Factor
- -0.4%
- Balancing Authority
- Midcontinent Independent Transmission System Operator, Inc..
- ISO/RTO
- MISO
- NERC Region
- MRO
Decorah Battery
OperatingBESS
Ranked #2 of 4 BESS plants in IA#757 of 837 nationally
2.5 MW BESS operating in Winneshiek, IA — Midcontinent Independent Transmission System Operator, Inc..
EIAWD
2.5 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2021
Operating Since
Location
Coordinates
43.3240, -91.7930
County
Winneshiek, IA
Nearby Plants
- Luther College Wind ProjectWind1.6 MW · 2.6 km
- DPC MadisonSolar1.5 MW · 13.1 km
- Alliant SBD 9206 DonaldsonDistillate Oil1.6 MW · 28.1 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Interstate Power and Light Co | Interstate Power and Light | — |
| Owner(s) | Interstate Power and Light Co | Alliant Energy | — |
| Status | Operating | — | — |
Ownership Chain
About
Decorah Battery is a 2.5 MW battery energy storage system located in Winneshiek County, Iowa. The plant began operating in 2021 and is owned by Alliant Energy, with Interstate Power and Light Co. listed as the EIA operator. It is the second-largest of four battery storage plants in Iowa, and ranks 1090th out of 1205 nationally. The plant consists of a single generator utilizing battery technology, with a total storage capacity of 2.9 MWh.
The battery system uses lithium-ion (LIB) chemistry and has a duration of 1.16 hours. Decorah Battery operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority, within the NERC region MRO. The plant's primary fuel is electricity (MWH), indicating it charges from the grid.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
MRO
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc..
Grid Voltage
13.8 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Generation
−4 MWh
Net Charging
-88 MWh
Annual Net Energy
-0.4%
Capacity Factor
Positive values indicate net discharge (generation exceeds station load). Negative values indicate net charging. Pure battery storage plants are typically net negative due to round-trip efficiency losses.
Financial Data
No financial data available for this plant.
Pricing & Market Data
MEDIUM confidencePoint of Interconnection
Nearest Substation
Decorah Substation · 69 kV
Substation Distance
< 10 km
Operator
Alliant Energy
Coord Source
OSM spatial
Market Position
ISO/RTO Market
MISO
LMP Node
—
Pricing Hub
MINN.HUB
Node Source
OSM spatial match
Substation identified. Node ID not yet resolved against ISO roster.
News & Articles (9)Beta
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Alliant Energy battery project in Sheboygan underway after delays
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Ameresco, Alliant Energy, begin operating record-breaking BESS projects in Arizona, Wisconsin
Ameresco has put Arizona's largest behind-the-meter battery energy storage system (BESS) into operation, meanwhile Alliant Energy has begun...
Energy-Storage.News·5 months ago
Last updated 2026-03-26
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