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13.5 kWh
Battery moduleTesla

Tesla Powerwall 3 Expansion

13.5 kWh · Lithium Ion Phosphate

UL 1973CEC listed · Oct 11, 2024Installed in 495 SoCal permits
  • Nameplate energy13.5 kWh
  • Warranty10 years
  • ChemistryLithium Ion Phosphate

Overview

CEC Battery List

Powerwall 3 Expansion: 13.5 kWh nameplate energy; lithium ion phosphate; 10 years warranty; named in 495 Southern California permits.

Stacking & expansion

CEC Battery List · Tesla datasheet

Installation & environment

CEC Battery List · Tesla datasheet

Warranty

CEC Battery List · Tesla datasheet

Safety listings

CEC Battery List
UL 9540 certifies the whole storage system; UL 9540A is the fire-propagation test that fire codes ask for indoors and near walls.

Full specifications

CEC Battery List · Tesla datasheet

Installs in Southern California

building permits
495
Permits name it
Mar 2024 – Oct 2026
6
Jurisdictions so far
LA County (unincorp.) (398), Palmdale (51), Chula Vista (23), Huntingt
1
Units per install
median of 409 permits

Permits over time

1Q1 ’240Q2 ’240Q3 ’2411Q4 ’2459Q1 ’2569Q2 ’2584Q3 ’2592Q4 ’2550Q1 ’2666Q2 ’2661Q3 ’262Q4 ’26permits per quarter

Installed together with

Qcells Q.PEAK DUO
21
Qcells Q.TRON
20
LONGi Hi-MO 5
12
JA Solar JAM54S31-xxx/MR
10
Silfab Solar SIL-xxxQD
10
Tesla TSP
9

Top ZIP codes

  • ZIP 9355133
  • ZIP 9138420
  • ZIP 9121420
  • ZIP 9100120
  • ZIP 9174819
  • ZIP 9355019
  • ZIP 9004315
  • ZIP 9131115
  • Other ZIP codes21
Only installer and ZIP level is shown — no homeowner names, street addresses or permit numbers. Permits from LA County (unincorp.), Santa Monica come without a contractor license, so they count toward totals but not toward installers. Counts grow as more permit portals are loaded.

Who installs Powerwall 3 Expansion

building permits · CSLB License Master
TE
Tesla Energy Operations Inc
Fremont · CSLB #888104
15 installsFeb 2025 – Aug 2026Palmdale, Huntington Beach
QF
Qcells For New Homes
Irvine · CSLB #1090641
11 installsApr 2026 – Sep 2026Palmdale, Chula Vista
SS
Stellar Solar Electric
Oceanside · CSLB #749095
8 installsMay 2026 – Oct 2026Chula Vista
SC
Sun Capital Energy
Pomona · CSLB #1021860
5 installsApr 2026 – Sep 2026Palmdale
BO
Bright Ops
Worcester · CSLB #1020761
4 installsAug 2025 – Mar 2026Palmdale, Chula Vista
CE
Capital Energy LLC
Tempe · CSLB #1142165
4 installsAug 2026 – Sep 2026Palmdale
SS
Semper Solaris
El Cajon · CSLB #978152
3 installsDec 2024 – Sep 2026Chula Vista, San Diego County
S
Sunrun
Lehi · CSLB #750184
3 installsFeb 2025 – Sep 2026Huntington Beach
AS
Ameco Solar LLC
Valley Village · CSLB #1053172
2 installsApr 2025 – Dec 2025Palmdale, Huntington Beach
A
Aveyo
American Fork · CSLB #1110238
2 installsJul 2025 – Feb 2026Palmdale
BH
Baker Home Energy
Escondido · CSLB #858088
2 installsMay 2026 – Jul 2026Chula Vista
CS
Cpg Solar
Northridge · CSLB #924297
2 installsApr 2025 – Oct 2025Palmdale
LE
Lgcy Electric
Lehi · CSLB #1099095
2 installsJul 2026Palmdale, Chula Vista
PC
Pacific Coast Generation Inc
Canyon Lake · CSLB #1074469
2 installsApr 2026 – Sep 2026Chula Vista, Palmdale
SO
Solar Optimum Design & Electrical
Glendale · CSLB #972228
2 installsOct 2025 – Jun 2026Huntington Beach, Palmdale
and 21 more licensed installers

Documents

manufacturer documents

Questions & answers

How much energy does the Tesla Powerwall 3 Expansion store?

13.5 kWh nameplate, per the California Energy Commission list.

Can you add more Powerwall 3 Expansion units?

Yes — up to 7 units per system.

Can the Powerwall 3 Expansion be installed outdoors?

Installation location per the datasheet: indoor/outdoor; enclosure NEMA 3R, NEMA 4X.

What warranty does the Powerwall 3 Expansion have?

10 years (datasheet).

Who installs the Powerwall 3 Expansion in Southern California?

Building permits name it 495 times. The most active licensed installers are Tesla Energy Operations Inc, Qcells For New Homes, Stellar Solar Electric.

Sources

  1. California Energy Commission — Energy Storage System List, data as of Oct 7, 2026. Manufacturer-reported values confirmed by CEC against certificates.
  2. California Energy Commission — Battery List, data as of Oct 7, 2026.
  3. Tesla — datasheet Powerwall 3 Datasheet.
  4. Tesla — document library on the manufacturer’s website (links above).
  5. Building permits — Southern California permit portals. Equipment matched from permit descriptions.
  6. Contractors State License Board — License Master (contractor names and license status), as of Oct 5, 2026.