Melrose BESS
San Diego County, California · EIA plant ID 66281 · Operator: San Diego Gas & Electric Co
Nameplate20MWSummer 20 MW
Generators2in service
Net generation-2GWh12 mo to Dec 2025
Capacity factor—not meaningful for storage
Heat rate—thermal plants only
First online2024
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), primary-fuel units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
No capacity factor available.
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) |
|---|---|---|---|
| 2024 | -2.4 | — | — |
| 2025 | -2.4 | — | — |
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 | Batteries | BA | 10 | 10 | Mar 2024 | Operating | — | coming soon |
| 2 | Batteries | BA | 10 | 10 | Mar 2024 | Operating | — | coming soon |
Owner / operator
Operator: San Diego Gas & Electric Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| San Diego Gas & Electric Co | 100.0% | 20 MW |
Nearby plants
Within 80 km.
| Vista Energy Storage System | 40 MW | 0.4 km |
| San Diego - NCRC at Vista | 2 MW | 1.9 km |
| GEN005 Antibody Fuel Cell | 3 MW | 4.3 km |
| Genentech-Oceanside Hybrid | 7 MW | 4.4 km |
| Gilead Oceanside Solar Project | 2 MW | 4.8 km |
| San Diego Sockers | 1 MW | 5.8 km |