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11.8 MW BESS operating in Weld, CO — Western Area Power Administration - Rocky Mountain Region
11.8 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2024
Operating Since
Coordinates
40.1462, -104.5487
County
Weld, CO
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Keenesburg Energy Storage LLC | Ameresco | — |
| Owner(s) | Ameresco | Ameresco | — |
| Status | Operating | — | — |
Keenesburg Battery Storage is a battery energy storage system (BESS) located in Weld County, Colorado. The plant has a total capacity of 11.8 MW and came online in 2024. It is owned by Ameresco and operated by United Power, Inc. The facility utilizes lithium-ion batteries (LIB) and has a total storage capacity of 47 MWh, providing a duration of approximately 3.98 hours at full output.
The plant consists of a single generator and operates within the Western Electricity Coordinating Council (WECC) NERC region. Its balancing authority is the Western Area Power Administration - Rocky Mountain Region. Keenesburg Battery Storage is ranked as the 11th largest of 18 battery storage facilities in Colorado, and 726th nationally out of 1205 such facilities. The plant's primary fuel is electricity (MWH), indicating it charges from the grid.
Generated from EIA, GEM, and public data sources
Grid Region
Mountain West
Market
Bilateral Market
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
−169 MWh
Net Charging
-1.1K MWh
Annual Net Energy
-1.1%
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.
2023
$1,361/kW
Est. Construction Cost
Total estimated cost: $16.1M
This plant is in a bilateral market territory without organized wholesale pricing. Nodal pricing data is not available.
Last updated 2026-03-14
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ask pi about Keenesburg Battery StorageWestern Area Power Administration - Rocky Mountain Region (WACM)
Grid Voltage
13.2 kV
Regulatory Status
RE — Regulated
Entity Type
—
Sector
Electric Utility