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129–200.7 kWh

Commercial energy storage systemGrowatt

Growatt WIT-M+APX ESS [xxxkW, xxxkWh]

129–200.7 kWh · 50–100 kW · Lithium Iron Phosphate · 24 configurations

UL 9540UL 1741 SBCEC listed · Sep 3, 2024

Nameplate energy129–200.7 kWh
Continuous power50–100 kW
ChemistryLithium Iron Phosphate

Overview

CEC Energy Storage System List

WIT-M+APX ESS [xxxkW, xxxkWh]: 129–200.7 kWh nameplate energy; 50–100 kW continuous; lithium iron phosphate.

Models & configurations

CEC Energy Storage System List · 24 listings

Model	Energy	Power	Grid voltage	Round trip	CEC listed
WIT-M+APX ESS [50kW, 129.0kWh]	129 kWh	50 kW	480 V	—	Sep 3, 2024
WIT-M+APX ESS [63kW, 129.0kWh]	129 kWh	63 kW	480 V	—	Sep 3, 2024
WIT-M+APX ESS [75kW, 129.0kWh]	129 kWh	75 kW	480 V	—	Sep 3, 2024
WIT-M+APX ESS [100kW, 129.0kWh]	129 kWh	100 kW	480 V	—	Sep 3, 2024
WIT-M+APX ESS [50kW, 143.3kWh]	143.3 kWh	50 kW	480 V	—	Sep 3, 2024
WIT-M+APX ESS [63kW, 143.3kWh]	143.3 kWh	63 kW	480 V	—	Sep 3, 2024
WIT-M+APX ESS [75kW, 143.3kWh]	143.3 kWh	75 kW	480 V	—	Sep 3, 2024
WIT-M+APX ESS [100kW, 143.3kWh]	143.3 kWh	100 kW	480 V	—	Sep 3, 2024
WIT-M+APX ESS [50kW, 157.6kWh]	157.6 kWh	50 kW	480 V	—	Sep 3, 2024
WIT-M+APX ESS [63kW, 157.6kWh]	157.6 kWh	63 kW	480 V	—	Sep 3, 2024
WIT-M+APX ESS [75kW, 157.6kWh]	157.6 kWh	75 kW	480 V	—	Sep 3, 2024
WIT-M+APX ESS [100kW, 157.6kWh]	157.6 kWh	100 kW	480 V	—	Sep 3, 2024
WIT-M+APX ESS [50kW, 172.0kWh]	172 kWh	50 kW	480 V	—	Sep 3, 2024
WIT-M+APX ESS [63kW, 172.0kWh]	172 kWh	63 kW	480 V	—	Sep 3, 2024
WIT-M+APX ESS [75kW, 172.0kWh]	172 kWh	75 kW	480 V	—	Sep 3, 2024
WIT-M+APX ESS [100kW, 172.0kWh]	172 kWh	100 kW	480 V	—	Sep 3, 2024
WIT-M+APX ESS [50kW, 186.3kWh]	186.3 kWh	50 kW	480 V	—	Sep 3, 2024
WIT-M+APX ESS [63kW, 186.3kWh]	186.3 kWh	63 kW	480 V	—	Sep 3, 2024
WIT-M+APX ESS [75kW, 186.3kWh]	186.3 kWh	75 kW	480 V	—	Sep 3, 2024
WIT-M+APX ESS [100kW, 186.3kWh]	186.3 kWh	100 kW	480 V	—	Sep 3, 2024
WIT-M+APX ESS [50kW, 200.7kWh]	200.7 kWh	50 kW	480 V	—	Sep 3, 2024
WIT-M+APX ESS [63kW, 200.7kWh]	200.7 kWh	63 kW	480 V	—	Sep 3, 2024
WIT-M+APX ESS [75kW, 200.7kWh]	200.7 kWh	75 kW	480 V	—	Sep 3, 2024
WIT-M+APX ESS [100kW, 200.7kWh]	200.7 kWh	100 kW	480 V	—	Sep 3, 2024

Capacity & power

CEC Energy Storage System List

Nameplate energy (CEC)129–200.7 kWh
Rated power (CEC)50–100 kW
Max continuous discharge (CEC)50–100 kW
Full-power discharge timeabout 2 h at full power
ChemistryLithium Iron Phosphate
Grid connection480 V

Safety listings

CEC Energy Storage System List

UL 9540 (energy storage system)Certified by Intertek
Certificate date & editionApr 25, 2024 · Ed. 3 : 2023

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)Yes
CSIP (IEEE 2030.5)Yes (with conditions)
JA12 declaration (Title 24)No
CEC noteOnly capable of receiving DC input from PV module system if equipped with a hybrid inverter component.
Monitor Key Data schedulingYes

Questions & answers

How much energy does the Growatt WIT-M+APX ESS [xxxkW, xxxkWh] store?

129–200.7 kWh nameplate, per the California Energy Commission list.

Is the WIT-M+APX ESS [xxxkW, xxxkWh] UL 9540 certified?

Yes — the CEC list shows UL 9540 certification (certified by intertek).

Sources

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