Lake Mabel Solar and Battery Storage
Polk County, Florida · EIA plant ID 66128 · Operator: Tampa Electric Co
Nameplate115MWSummer 115 MW
Generators2in service
Net generation134GWh12 mo to Aug 2026
Capacity factor21%solar units, summer MW
Heat rate—thermal plants only
First online2023
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), solar units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2023 | 5 | 9.1% | — |
| 2024 | 131.7 | 20.1% | — |
| 2025 | 129.9 | 20.3% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1 | Solar Photovoltaic | PV | 74.5 | 74.5 | Dec 2023 | Operating | — | coming soon |
| BESS1 | Batteries | BA | 40 | 40 | Mar 2025 | Operating | — | coming soon |
Owner / operator
Operator: Tampa Electric Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Tampa Electric Co | 100.0% | 115 MW |
Nearby plants
Within 80 km.
| Florida's Natural Growers | 11 MW | 7.6 km |
| Legoland Solar | 1 MW | 7.9 km |
| Cutrale Citrus Juices USA II | 8 MW | 20.3 km |
| Peace Creek Solar | 55 MW | 20.9 km |
| Osprey Energy Center Power Plant | 644 MW | 21.1 km |
| Bartow Solar Energy LLC | 7 MW | 21.3 km |