# Santee BESS

CAISO asset profile · https://askthegrid.com/assets/facilities/santee-bess

San Diego Gas & Electric Company - San Diego County - CAISO

Santee BESS is SDG&E’s 10 MW / 40 MWh battery beside its Santee Substation in San Diego County. The utility’s fact sheet describes a four-hour lithium iron phosphate system in twelve twenty-foot containers. EIA’s August 2026 preliminary inventory lists the unit as operating from January 2026, later than the project’s original 2024 target and subsequent construction schedules.

## Profile

- **SDG&E role:** Utility owner and operator, rather than only a power purchaser or transmission neighbor.

## Metrics

- **Project power / energy:** 10 MW / 40 MWh — 4-hour project design reported by the utility or supplier; power is MW and stored energy is MWh.
- **Nameplate capacity:** 10 MW — Canonical EIA plant baseline.
- **Registry anchor:** Plant 67118 — plant-67118

## Facts

- **Technology:** Batteries
- **Operator:** San Diego Gas & Electric Company
- **Operating status:** Operating

## Related parties

- **Owner / operator:** San Diego Gas & Electric Company — owner and operator ([source](https://www.sdge.com))
- **EPC contractor / construction contractor:** Stella Energy Solutions — EPC contractor ([source](https://www.stellaess.com))
- **Balancing authority / market operator:** California Independent System Operator — market operator and dispatcher ([source](https://www.caiso.com))
- **Parent company:** Sempra — parent company of owner ([source](https://www.sempra.com))

## Sources

- [docs.cpuc.ca.gov](https://docs.cpuc.ca.gov/PublishedDocs/Published/G000/M521/K418/521418164.pdf) — docs.cpuc.ca.gov · authoritative — Source retained for exact-record publication review.
- [docs.cpuc.ca.gov](https://docs.cpuc.ca.gov/PublishedDocs/Published/G000/M521/K425/521425115.PDF) — docs.cpuc.ca.gov · authoritative — Source retained for exact-record publication review.
- [caiso.com](https://www.caiso.com/) — caiso.com · public_source — Source retained for exact-record publication review.
- [eia.gov](https://www.eia.gov/electricity/monthly/epm_table_grapher.php?t=table_6_03) — eia.gov · authoritative — Source retained for exact-record publication review.
- [sdge.com](https://www.sdge.com/more-information/our-company) — sdge.com · public_source — Source retained for exact-record publication review.
- [sdge.com](https://www.sdge.com/sites/default/files/Santee%20BESS%20Additional%20Project%20Update%20Notification%20Letter%2007-30-24_0.pdf) — sdge.com · public_source — Source retained for exact-record publication review.
- [sdge.com](https://www.sdge.com/sites/default/files/documents/FINAL%20S2470058%20SanteeBESS_FS_ONLINE%20%281%29.pdf) — sdge.com · public_source — Source retained for exact-record publication review.
- [stellaess.com](https://www.stellaess.com/) — stellaess.com · public_source — Source retained for exact-record publication review.

---

Canonical page: https://askthegrid.com/assets/facilities/santee-bess
Website: [San Diego Gas & Electric Company](https://www.sdge.com)

Source: Ask the Grid — https://askthegrid.com/