SolarApprovalsIndependent equipment intelligenceSource library
Equipment directory/Energy storage
ELM Fieldsight LLC

MG2.1-AC1-0500-05-B

Energy storage · 1 exact configuration · California, US

Choose a configuration ↓
i

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

500 kW, 4180 kWh, energy storage system with PCS functionality.

The figures below refer to MG2.1-AC1-0500-05-B. Use the configuration table for other variants.

Nameplate power
500 kW
Nominal AC voltage
480 V AC
Nameplate energy capacity
4,180 kWh
Technology
Lithium Iron Phosphate
UL 1741 SB in CEC source
Reported
JA12 declaration
N

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 MG2.1-AC1-0500-05-B
CEC model / configurationNameplate powerCapacityObservationCompare
MG2.1-AC1-0500-05-BEnergy Storage System row 1599500 kW4,180 kWhListed in CEC

Source specifications and conditions

Additional source information for MG2.1-AC1-0500-05-B. Qualifiers, reported control modes and required devices are retained as written. Power-control listings do not establish arbitrary battery/inverter pairings.

CEC listing date
2026-03-11
PV DC input capability
Y
UL 9540 certificate date
2025-12-08
UL 9540 certifying entity
Intertek
Firmware version(s) tested
No Information Submitted
UL 1741 SB certificate date
[3/4/2024]
UL 1741 SB certifying entity
TUV Rheinland
Certified JA12 control strategies
No Information Submitted
Maximum continuous discharge rate (kW)
500
Manufacturer-declared round-trip efficiency (%)
No Information Submitted

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 CECMG2.1-AC1-0500-05-B
    Archived CEC source