Tesla Megapack

Name: Tesla Megapack
Brand: Tesla

168.6–174.4 kWh · 43.6–84.3 kW · Lithium Ion · 4 configurations

UL 9540CEC listed · Nov 12, 2020

Overview

CEC Energy Storage System List

Megapack: 168.6–174.4 kWh nameplate energy; 43.6–84.3 kW continuous; lithium ion.

CEC Energy Storage System List · 4 listings

Model	Energy	Power	Grid voltage	Round trip	CEC listed
1462965-XX-Y {480V, 2hr}	168.6 kWh	71.5 kW	480 V	—	Nov 12, 2020
1462965-XX-Y {505V, 2hr}	168.6 kWh	75.22 kW	505 V	—	Nov 12, 2020
1462965-XX-Y {480V, 4hr}	174.4 kWh	71.5 kW	480 V	—	Nov 12, 2020
1462965-XX-Y {505V, 4hr}	174.4 kWh	75.22 kW	505 V	—	Nov 12, 2020

CEC Energy Storage System List

CEC Energy Storage System List

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

CEC Energy Storage System List

UL 1741 SB (IEEE 1547-2018)No
UL 1741 SA (Rule 21)Yes
CSIP (IEEE 2030.5)Yes (with conditions)
JA12 declaration (Title 24)No
CEC noteThe Megapack System scales up to 2.5 MWh+. A single 2 hour Megapack can consist from 1 to 22 inverters and from 1 to 15 battery pods.
Last CEC updateJan 21, 2021
Monitor Key Data schedulingYes

How much energy does the Tesla Megapack store?

168.6–174.4 kWh nameplate, per the California Energy Commission list.

Is the Megapack UL 9540 certified?

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

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