Pylontech Optim US-B1-M7-A-ex/xx-US-04

Name: Pylontech Optim US-B1-M7-A-ex/xx-US-04
Brand: Pylontech

52.2–418 kWh · 26.1–209 kW · Lithium Iron Phosphate · 8 configurations

UL 9540CEC listed · Apr 13, 2026

Overview

CEC Energy Storage System List

Optim US-B1-M7-A-ex/xx-US-04: 52.2–418 kWh nameplate energy; 26.1–209 kW continuous; lithium iron phosphate.

CEC Energy Storage System List · 8 listings

Model	Energy	Power	Grid voltage	Round trip	CEC listed
Optim US-B1-M7-A-ex/52-US-04	52.2 kWh	26.12 kW	—	—	Apr 13, 2026
Optim US-B1-M7-A-ex/104-US-04	104.5 kWh	52.25 kW	—	—	Apr 13, 2026
Optim US-B1-M7-A-ex/156-US-04	156.8 kWh	78.38 kW	—	—	Apr 13, 2026
Optim US-B1-M7-A-ex/208-US-04	209 kWh	104.5 kW	—	—	Apr 13, 2026
Optim US-B1-M7-A-ex/261-US-04	261.2 kWh	130.62 kW	—	—	Apr 13, 2026
Optim US-B1-M7-A-ex/313-US-04	313.5 kWh	156.75 kW	—	—	Apr 13, 2026
Optim US-B1-M7-A-ex/365-US-04	365.8 kWh	182.88 kW	—	—	Apr 13, 2026
Optim US-B1-M7-A-ex/417-US-04	418 kWh	209 kW	—	—	Apr 13, 2026

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

How much energy does the Pylontech Optim US-B1-M7-A-ex/xx-US-04 store?

52.2–418 kWh nameplate, per the California Energy Commission list.

Is the Optim US-B1-M7-A-ex/xx-US-04 UL 9540 certified?

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

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