December 17, 2019
Sumitomo Electric Industries, Ltd.
*This press release was originally published in Japanese on November 21, 2019.

Home-Use Lithium-Ion Storage Battery Unit POWER DEPOTM III
Equipped with a Dual-Unit Linkage Function
Sumitomo Electric Industries, Ltd. is pleased to announce that a dual-unit linkage
function has been added to its POWER DEPOTM III, a compact and high-efficiency
lithium-ion storage battery unit. POWER DEPO TM III is compatible with the electric
power supply systems of electric power companies and has been released forhousehold use in Japan. The new function makes it possible to use two units ofPOWER DEPOTM III in combination as one 6.4-kWh (3.2 kWh x 2) storage battery
system that can be installed at indoor locations by taking advantage of its compactsize.
In recent years, large-scale and long periods of power failures have occurred throughout
Japan due to damage to power lines, an important lifeline, caused by typhoons or
torrential rain. Accordingly, home-use storage battery systems that can supply enoughelectric power in an emergency are drawing increasing attention.
In May 2017, Sumitomo Electric launched lithium-ion storage battery unit POWER
DEPOTM III (model: PDS-1500S01), which adopted the Company’s original power
conversion technology and thereby achieved the smallest size and the lightest weight inthe industry even though it is equipped with a storage battery power conditioner. And
now, the dual-unit linkage function provided to POWER DEPOTM III makes it possible tobuild a storage battery system with double the storage capacity while maintaining its
advantage of compact size suitable for indoor installation.
Features(1) Usable as a storage battery with a capacity of 6.4 kWh
By using two units of 3.2-kWh POWER DEPOTM III in combination, users can use
electricity for a continuous period of 18 hours at a constant power consumption of 300 W
and a continuous period of 28 hours while appropriately turning on and off home
appliances. It is also possible to build a dual unit system in a step-by-step manner,namely, a single-unit system can be upgraded to a dual-unit system by installing the1/3

second unit additionally at a later stage in accordance with the status of electric power
consumption.
(2) Compact size suitable for indoor installation
In general, 6-kWh-class storage battery systems often have limitations in their installation
places due to their size. Thanks to its smallest size and lightest weight in the industry,
Sumitomo Electric’s POWER DEPOTM III can be installed in small spaces, such as
narrow spaces at the back of the house or below bay windows as well as vacant indoor
spaces. When installing two units, it is not necessary to install them side by side, they
may be installed at separate locations to utilize limited spaces, for example, one on anoutdoor balcony and the other in an upstairs closet. It is also possible to install them on
the second or higher floor to avoid the risk of possible submergence in case of floodcaused by typhoons as well as at indoor locations to prevent damage caused by salty
wind or snowfall.
Sumitomo Electric is committed to the development and provision of products that
promote the widespread utilization of renewable energy.

System configuration▲ Example of POWER DEPO III installation in a narrow outdoor space (1st floor)
and on a balcony (2nd floor)

2/3Specifications
Single-unit system

Dual-unit system

Storage battery

Storage capacity

3.2 kWh6.4 kWh

System output

Rated output

1.0 kW

2.0 kW

AC 202 V

AC 202 V(Single-phase two-(Single-phase two-wire system)

wire system)

Rated output

1.5 kVA

1.5 kVA

Rated voltage

AC 101 V

AC 101 V

Single-phase two-Single-phase two-wire

wire systemsystemRated output

1.5 kVA

1.5 kVA

Rated voltage

AC 101 V

AC 101 V

Single-phase two-Single-phase two-wire

wire systemsystem

Rated voltage
Unit output

Output wiring
Auxiliary input

Input wiring■ Reference
Sumitomo Electric's Website
https://sumitomoelectric.com/

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