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114.5 MW Batteries (40 MW) + Solar Photovoltaic (75 MW) operating in Polk, FL
114.5 MW
Nameplate Capacity
2
Generators
units
Hybrid (2)
Technology
Batteries + Solar Photovoltaic
2023
Operating Since
Coordinates
27.9788, -81.6102
County
Polk, FL
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Tampa Electric Co | Tampa Electric | — |
| Owner(s) | Tampa Electric Co | Emera | — |
| Status | Operating | operating | — |
Lake Mabel Solar and Battery Storage is a hybrid power plant located in Polk County, Florida. The facility, which began operating in 2023, has a total capacity of 114.5 MW and consists of two generators utilizing both solar photovoltaic and battery storage technologies. The plant is owned by Emera, a Canadian company, and operated by Tampa Electric Co. Lake Mabel is ranked third out of five hybrid plants in Florida and 449th nationally out of 514 similar facilities. The solar component uses single-axis tracking. The battery energy storage system (BESS) has a duration of 2.58 hours. The plant operates within the Tampa Electric Company balancing authority and the SERC NERC region.
In its latest year of operation, Lake Mabel generated 129,880 MWh, achieving a capacity factor of 12.9%. Financial data indicates an installed cost of $1315 per kW. Data sources for the financial information include Lawrence Berkeley National Laboratory (LBNL) and the Federal Energy Regulatory Commission (FERC). The plant's primary fuel source is electricity measured in MWh, reflecting its reliance on solar energy and battery storage.
Generated from EIA, GEM, and public data sources
Grid Region
Southeast
Market
SEEM Participant
NERC Region
SERC — SERC Reliability Corporation
Balancing Authority
Tampa Electric Company (TEC)
Grid Voltage
69.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
7.9K MWh
Latest Month
129.9K MWh
Annual Generation
12.9%
Capacity Factor
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Solar photovoltaic · Tampa Electric Company · Data from 2023–2024
$1,315/kW
Installed Cost
$5.0/MWh
Operating Cost
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This plant's balancing authority participates in the Southeast Energy Exchange Market (SEEM). SEEM is a bilateral exchange — no public nodal pricing.
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
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