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11 MW Batteries (6 MW) + Solar Photovoltaic (5 MW) operating in Washington, AR — Southwest Power Pool
11 MW
Nameplate Capacity
2
Generators
units
Hybrid (2)
Technology
Batteries + Solar Photovoltaic
2019
Operating Since
Coordinates
36.0414, -94.1401
County
Washington, AR
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Today's Power, Inc. | Today's Power, Inc. | — |
| Owner(s) | Today's Power, Inc. | — | — |
| Status | Operating | operating | — |
Located in Washington County, Arkansas, the Westside Wastewater Treatment Plant Hybrid is a hybrid power plant owned and operated by Today's Power, Inc. The plant began operating in 2019 and has a total capacity of 11 MW across two generators. The primary fuel source is listed as MWH, and the plant utilizes both solar photovoltaic technology with single-axis tracking and battery storage. The battery energy storage system (BESS) has a capacity of 13.1 MWh, a duration of 2.18 hours, and uses lithium-ion battery chemistry (LIB).
The plant operates within the Southwest Power Pool (SPP) balancing authority and the Midwest Reliability Organization (MRO) NERC region. In its latest year of reported generation, the plant produced 2,774 MWh, resulting in a capacity factor of 2.9%. The plant is ranked as the second largest of five hybrid plants in Arkansas and 733rd out of 1205 nationally. Financial data is available for the plant, sourced from Lawrence Berkeley National Laboratory (LBNL) solar data. There has been one news article published about the plant, categorized under hazards.
Generated from EIA, GEM, and public data sources
ISO/RTO
SPP
Market
ISO/RTO Member
NERC Region
MRO — Midwest Reliability Organization
Balancing Authority
Southwest Power Pool (SWPP)
Grid Voltage
12.47 kV
Regulatory Status
RE — Regulated
Entity Type
Cooperative
Sector
Commercial Non-CHP
0 MWh
Net Discharge
2.8K MWh
Annual Net Energy
2.9%
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.
Data from 2019–2024
$31.6/MWh
Energy Value
$30.1/MWh
Capacity Value
Market Position
ISO/RTO Market
SPP
LMP Node
PSLO_EES_CSWS
Pricing Hub
SPP South Hub
Location Type
Settlement Location
Node Source
Curated node match
No news articles linked yet for this plant.
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ask pi about Westside Wastewater Treatment Plant Hybr