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Equipment directory/Legacy PCS
Tesla Inc.

1748844-XX-Y

Legacy PCS · 3 exact configurations · California, US

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A registry listing is a starting point. CEC inclusion is not nationwide installation approval. Confirm the exact model and configuration with your utility and local authority.

How to use this data

Equipment overview

Energy Storage System paired with Tesla Site Controller for PCS functionality, may be paired with PV system

The figures below refer to 1748844-XX-Y {2hr}. Use the configuration table for other variants.

Controlled apparent power
20000 kVA
Operating voltage
480 V
PCS functionality
ESS
Technology
Not reported

Specifications are reported in the CEC source; SolarApprovals has not independently tested this equipment. A missing value does not mean zero or a failed certification.

Exact configurations

CEC annotations in braces identify the listed configuration and are not part of the manufacturer’s model number. Variants share this canonical page.

Exact CEC configurations for 1748844-XX-Y
CEC model / configurationControlled apparent powerVoltage / displayObservationCompare
1748844-XX-Y {2hr}PCS Data for Inverter and ESS row 170920000 kVA480 VListed in CEC
1748844-XX-Y {3hr}PCS Data for Inverter and ESS row 171020000 kVA480 VListed in CEC
1748844-XX-Y {4hr}PCS Data for Inverter and ESS row 171120000 kVA480 VListed in CEC

Source specifications and conditions

Additional source information for 1748844-XX-Y {2hr}. Qualifiers, reported control modes and required devices are retained as written. Power-control listings do not establish arbitrary battery/inverter pairings.

Source notes
The "Megapack 2" System scales up to 3 MWh+. A single 2 hour Megapack 2 can consist from 1 to 18 inverters and battery pods subsystems. Maximum continuous current and power are based on the largest scalable configuration of Megapack 2.
Equipment type
ESS
CEC listing date
2023-04-21
Export-only mode
N
Import-only mode
Y
No-exchange mode
N
Unrestricted mode
N
Phase configuration
Multi
PCS CRD document date
2022-11-16
PCS CRD issuing entity
TUV Rheinland of North America
Additional required devices
Tesla Site Controller (1471208-XX-Y), Site Meter (SEL-735), and compatible CTs
Output voltage as reported (V)
480
Export-only response time (seconds)
N/A
Import-only response time (seconds)
0.95
No-exchange response time (seconds)
N/A
Current measurement reference points
Inverter, Site Meter, and compatible CTs
Unrestricted response time (seconds)
N/A
Maximum apparent power as reported (kVA)
20000
Maximum continuous current as reported (A)
24000

Use the source row references above to inspect the conditions for each other configuration.

Documented compatibility

No specific equipment pairing has been verified for this model.

Shared voltage, a hybrid designation, or the same manufacturer does not establish compatibility. Check the manufacturer’s installation documents for exact model combinations, firmware, and operating conditions.

Registry observation history

Dates show when SolarApprovals observed a status. The first observation is not the original CEC listing date. History begins with our first import.

  • Sep 21, 2026 · California Energy CommissionFirst observed: Listed in CEC1748844-XX-Y {4hr}
    Archived CEC source
  • Sep 21, 2026 · California Energy CommissionFirst observed: Listed in CEC1748844-XX-Y {3hr}
    Archived CEC source
  • Sep 21, 2026 · California Energy CommissionFirst observed: Listed in CEC1748844-XX-Y {2hr}
    Archived CEC source