Hioki Regional Energy Co., Ltd.
Kyocera Corporation
Hitachi Power Solutions Co., Ltd.
September 11, 2020

Hioki Regional Energy, Kyocera, and Hitachi PowerSolutions Sign Joint Research Agreement forMicrogrid Energy Management
Hioki Regional Energy Co., Ltd., Kyocera Corporation, and Hitachi Power Solutions Co., Ltd.
announced the signing of a joint research agreement for microgrid* energy management in Hioki
City, Kagoshima Prefecture, in Kyushu, Japan on July 27, 2020.
Through this joint research, in cooperation with Hioki City, the three companies aim to contribute todecarbonization in the region with locally produced and consumed renewable energy, revitalize theregional economy, and develop power balancing technology that continues to supply electricity
during natural disasters.
Joint Research Overview
Hioki Regional Energy Co., Ltd., was established in 2015 from an investment from several
companies, organizations, and individuals (17 in total), with deep ties to Hioki City. The company
has been supplying electric power to households and companies mainly in Hioki City since July 2016
to create a sustainable community, and in March 2019, the company began operating microgrids intwo areas combining both solar power generation and cogeneration systems. In one area, solar
electricity was supplied to consumers through private power distribution lines, while the remaining
electricity shortage was supplied by the Japan Electric Power Exchange (JEPX) and other sources.
The joint research aims to increase the proportion of renewable energy used in the region and help
revitalize the regional economy by introducing energy management systems (EMS) for industrial
storage batteries and regional electricity companies to optimize power costs through the effective useof surplus power generated from solar, peak-cut control, and energy imbalance adjustment. Inaddition, the project will verify the effectiveness of solar storage batteries in supplying back-up
electricity to Hioki City facilities during natural disasters.
*"microgrid" refers to a small-scale energy network that does not rely on the power supply of a large-scale power plant but aims for
local production and consumption using energy sources and consumption facilities in the community.

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Conceptual diagram of microgrid energy management experiment

As part of the research, Kyocera is in charge of installing the industrial storage battery systems andthe development of a regional EMS, Hitachi Power Solutions, which designed and constructed theexisting microgrid, is in charge of storage battery system design, and Hioki Regional Energy will
operate the systems. The joint experiment will be conducted for a period of one year beginning
February 2021.
The three companies aim to contribute to sustainable community development through stable locally
produced and consumed renewable energy, and help revitalize the local economy.
About Hioki Regional Energy Co., Ltd.
The Hioki Regional Energy Co., Ltd., established in 2015 with the investment from companies,organizations, and individuals, deeply related to Hioki City (17 in total) has been supplying electric
power to households and companies mainly in Hioki City since July 2016, aiming to construct asustainable community. The company plays a role to support residents’ life and communityactivities. Moreover, they aim to contribute to regional economies and to create jobs throughelectricity generation, electricity sales, and infrastructure development. The Hioki Regional EnergyCo., Ltd. will contribute to development of the Hioki City through this activity.

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but may be subject to change without prior notice.
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