Growatt WIT-L2+APX ESS [xxkW, xxkWh]

Name: Growatt WIT-L2+APX ESS [xxkW, xxkWh]
Brand: Growatt

86–114.6 kWh · 28–55 kW · Lithium Iron Phosphate · 12 configurations

UL 9540UL 1741 SBCEC listed · Sep 3, 2024

Overview

CEC Energy Storage System List

WIT-L2+APX ESS [xxkW, xxkWh]: 86–114.6 kWh nameplate energy; 28–55 kW continuous; lithium iron phosphate.

CEC Energy Storage System List · 12 listings

Model	Energy	Power	Grid voltage	Round trip	CEC listed
WIT-L2+APX ESS [28kW, 86.0kWh]	86 kWh	28 kW	208 V	—	Sep 3, 2024
WIT-L2+APX ESS [35kW, 86.0kWh]	86 kWh	35 kW	208 V	—	Sep 3, 2024
WIT-L2+APX ESS [40kW, 86.0kWh]	86 kWh	40 kW	208 V	—	Sep 3, 2024
WIT-L2+APX ESS [55kW, 86.0kWh]	86 kWh	55 kW	208 V	—	Sep 3, 2024
WIT-L2+APX ESS [28kW, 100.3kWh]	100.3 kWh	28 kW	208 V	—	Sep 3, 2024
WIT-L2+APX ESS [35kW, 100.3kWh]	100.3 kWh	35 kW	208 V	—	Sep 3, 2024
WIT-L2+APX ESS [40kW, 100.3kWh]	100.3 kWh	40 kW	208 V	—	Sep 3, 2024
WIT-L2+APX ESS [55kW, 100.3kWh]	100.3 kWh	55 kW	208 V	—	Sep 3, 2024
WIT-L2+APX ESS [28kW, 114.6kWh]	114.6 kWh	28 kW	208 V	—	Sep 3, 2024
WIT-L2+APX ESS [35kW, 114.6kWh]	114.6 kWh	35 kW	208 V	—	Sep 3, 2024
WIT-L2+APX ESS [40kW, 114.6kWh]	114.6 kWh	40 kW	208 V	—	Sep 3, 2024
WIT-L2+APX ESS [55kW, 114.6kWh]	114.6 kWh	55 kW	208 V	—	Sep 3, 2024

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)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

How much energy does the Growatt WIT-L2+APX ESS [xxkW, xxkWh] store?

86–114.6 kWh nameplate, per the California Energy Commission list.

Is the WIT-L2+APX ESS [xxkW, xxkWh] UL 9540 certified?

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

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