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11.8 MW BESS operating in Adams, CO — Western Area Power Administration - Rocky Mountain Region
11.8 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2024
Operating Since
Coordinates
35.2377, -91.6877
County
Adams, CO
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Bromley Energy Storage LLC | Ameresco | — |
| Owner(s) | Ameresco | Ameresco | — |
| Status | Operating | — | — |
Bromley Battery Storage is a battery energy storage system (BESS) located in Adams County, Colorado. The plant has a total capacity of 11.8 MW and began operating in 2024. It is owned by Ameresco and operated by United Power, Inc. The facility utilizes batteries as its primary fuel source, specifically lithium-ion batteries (LIB), and has a total storage capacity of 47 MWh, providing a duration of approximately 3.98 hours.
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. Bromley Battery Storage is ranked as the 9th largest of 18 battery storage facilities in Colorado and 727th nationally out of 1205 such facilities.
Generated from EIA, GEM, and public data sources
Grid Region
Mountain West
Market
Bilateral Market
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
−105 MWh
Net Charging
-865 MWh
Annual Net Energy
-0.8%
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 Bromley Battery StorageWestern Area Power Administration - Rocky Mountain Region (WACM)
Grid Voltage
13.2 kV
Regulatory Status
RE — Regulated
Entity Type
—
Sector
Electric Utility