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160.3–163.2 kWh

Commercial energy storage systemTesla

Tesla Megapack 2

160.3–163.2 kWh · 40.8–80.3 kW · Lithium Ion · 3 configurations

UL 9540UL 1741 SBCEC listed · Jul 21, 2022

Nameplate energy160.3–163.2 kWh
Continuous power40.8–80.3 kW
ChemistryLithium Ion

Overview

CEC Energy Storage System List

Megapack 2: 160.3–163.2 kWh nameplate energy; 40.8–80.3 kW continuous; lithium ion.

Models & configurations

CEC Energy Storage System List · 3 listings

Model	Energy	Power	Grid voltage	Round trip	CEC listed
1748844-XX-Y {3hr}	160.3 kWh	50 kW	480 V	—	Nov 14, 2022
1748844-XX-Y {2hr}	160.6 kWh	50 kW	480 V	—	Jul 21, 2022
1748844-XX-Y {4hr}	163.2 kWh	50 kW	480 V	—	Jul 21, 2022

Capacity & power

CEC Energy Storage System List

Nameplate energy (CEC)160.3–163.2 kWh
Rated power (CEC)50 kW
Max continuous discharge (CEC)40.8–80.3 kW
Full-power discharge timeabout 2 h at full power
ChemistryLithium Ion
Grid connection480 V

Inverter & compatible equipment

CEC Energy Storage System List

Direct PV inputNo
Listed with inverters1682960-2X-Y, 1682960-4X-Y

Safety listings

CEC Energy Storage System List

UL 9540 (energy storage system)Certified by TUV Rheinland of North America
Certificate date & editionAug 23, 2022 · Ed. 2 : 2020

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

California grid & code compliance

CEC Energy Storage System List

UL 1741 SB (IEEE 1547-2018)Yes
UL 1741 SA (Rule 21)No
CSIP (IEEE 2030.5)Yes (with conditions)
JA12 declaration (Title 24)No
Last CEC updateApr 21, 2023
Monitor Key Data schedulingNo

Questions & answers

How much energy does the Tesla Megapack 2 store?

160.3–163.2 kWh nameplate, per the California Energy Commission list.

Is the Megapack 2 UL 9540 certified?

Yes — the CEC list shows UL 9540 certification (certified by tuv rheinland of north america).

Sources

California Energy Commission — Energy Storage System List, data as of Oct 7, 2026. Manufacturer-reported values confirmed by CEC against certificates.