United States › Power plants › Solar farms › California
SOLAR FARMS · BATTERY STORAGESienna Solar Farm
Sienna Solar Farm is a 400 MW planned solar and battery storage plant in San Bernardino County, California, operated by 99MT 8me, LLC.
Plant statusIn planning
- Planning (current stage)
- Consented (not yet reached)
- Construction (not yet reached)
- OperatingTarget Dec 2028 (not yet reached)
- Closed (not yet reached)
Planned start of operation reported to EIA: Dec 2028.
Generators
Each generating unit EIA lists at this plant.
| Unit | Technology | Capacity | Status |
|---|---|---|---|
| 99MT8 | Solar Photovoltaic | 200 MW | Planned, approvals not yet sought |
| 99MTB | Batteries | 200 MW | Planned, approvals not yet sought |
Plant details
- Operator
- 99MT 8me, LLC
- Location
- San Bernardino County, California
- Balancing authority
- CISO
- Sector
- IPP Non-CHP
- Capacity
- Planned: 400 MW
- EIA plant ID
- 64632
Location
34.4937, -116.9150
Nearby power plants
- Sienna 2 Solar and Storage ProjectSolar farms, Battery storage · 110 MW · 1.7 mi
- Lone Valley Solar Park II LLCSolar farms · 20.0 MW · 6.6 mi
- Lone Valley Solar Park I LLCSolar farms · 10.0 MW · 7.2 mi
- Longboat Solar, LLCSolar farms · 20.0 MW · 8.9 mi
- Powhatan Solar Power Generation StationSolar farms · 1.5 MW · 13.1 mi
- NunnSolar farms · 1.0 MW · 13.7 mi
- Foundation Cemex BMQWind farms · 3.0 MW · 14.4 mi
- Otoe Solar Power Generation Station 1 LLSolar farms · 1.5 MW · 16.2 mi
- Navajo Solar Power Generation Station 1Solar farms · 1.5 MW · 16.2 mi
- BBARWASolar farms · 1.9 MW · 16.6 mi
Source: U.S. Energy Information Administration, Form EIA-860M, September 2026. Planned dates are targets reported by the developer and often change. Report a problem