Los Angeles County Municipal Code § 1207.10 Mobile ESS Equipment and Operations
Los Angeles County Municipal Code · 2026-09 edition · updated 2026-10-04 · Los Angeles County
Cite as: Los Angeles County Municipal Code § 1207.10 · Text as of 2026-10-04
TABLE 1207.10 MOBILE ENERGY STORAGE SYSTEMS (ESS)
COMPLIANCE REQUIRED DEPLOYMENT a Feature Section
| All ESS installations | 1207.4 | Yes b |
|---|---|---|
| Fire suppression systems | 1207.5.5 | Yes c |
| Maximum allowable quantities | 1207.5.2 | Yes |
| Maximum enclosure size | 1207.5.6 | Yes |
| Means of egress separation | 1207.5.8 | Yes |
| Size and separation | 1207.5.1 | Yes d |
| Smoke and automatic fire detection | 1207.5.4 | Yes e |
| Technology-specific protection | 1207.6 | Yes |
| Vegetation control | 1207.5.7 | Yes |
See Section 1207.10.2.
b
Mobile operations on wheeled vehicles and trailers shall not be required to comply with Section 1207.4.4 seismic and structural load requirements.
c
Fire suppression system connections to the water supply shall be permitted to use approved temporary connections.
d
In walk-in units, ESS units are permitted to be installed on the walls of the enclosure, but separation is required between individual groups of ESS units described in Section 1207.5.1.
e
Where authorized by the fire code official, alarm signals are not be transmitted to an approved location when the mobile ESS is in transit to a deployment location. Alarm signal transmission shall be required upon the mobile ESS going operational.
1207.10.6 - Charging and storage.¶
Installations where mobile ESS are charged and stored shall be treated as permanent ESS indoor or outdoor installations, and shall comply with the following sections, as applicable:
Indoor charging and storage shall comply with Section 1207.7.
Outdoor charging and storage shall comply with Section 1207.8.
If permitted by the fire code official to occur, charging and storage on rooftops shall comply with Section 1207.9.
Exceptions:
Electrical connections shall be permitted to be made using temporary wiring complying with the manufacturer's instructions, the UL 9540 listing and the California Electrical Code.
Fire suppression system connections to the water supply shall be permitted to use approved temporary connections.
1207.10.7.2 - Restricted locations.¶
Deployed mobile ESS operations shall not be located indoors, in parking garages, on rooftops, below grade or under building overhangs.
1207.10.7.3 - Clearance to exposures.¶
Deployed mobile ESS shall be separated by a minimum of 10 feet (3048 mm) from the following exposures:
Public ways.
Buildings.
Stored combustible materials.
Hazardous materials.
High-piled storage.
Other exposure hazards.
Lot lines, unless approved by the fire code official based upon notarized permission obtained by the applicant from the owner(s) and/or occupant(s) of the affected parcel(s).
Deployed mobile ESS shall be separated by a minimum of 50 feet (15 240 mm) from public seating areas and from tents, canopies and membrane structures with an occupant load of 30 or more.
1207.10.7.6 - Fencing and impact protection.¶
An approved fence with a locked gate or other approved barrier shall be provided to keep the general public at least 5 feet (1524 mm) from the outer enclosure of a deployed mobile ESS.
The fire code official shall be authorized to require approved means of impact protection where deemed necessary.
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