en.Wedoany.com Reported - Osaka Gas and Osaka Gas Marketing have begun selling Kyocera's Enerezza Plus II residential battery system, primarily designed for use with solar photovoltaic arrays, to new home buyers.

Osaka Gas stated that it plans to launch an energy management service called Sumai Denchi EX as early as this year. This service aggregates household battery capacity to connect to Japan's balancing market and capacity market, creating a revenue stream for households independent of feed-in tariff subsidies. According to Osaka Gas's research as of June 2026, this will be Japan's first such service targeting new solar-equipped homes.

According to Osaka Gas, Japan opened its balancing market to residential-level flexible resources, including home batteries, in April 2026. Sumitomo Forestry has been named as the first homebuilder partner. The two companies are jointly developing a sales package that combines the Sumai Denchi EX service with surplus solar power purchase agreements and a renewable energy supply plan during construction.

The Enerezza Plus II system uses semi-solid clay-type lithium-ion batteries, which Kyocera claims have a rated charge-discharge cycle life of 20,000 cycles. The battery is classified as non-hazardous under relevant Japanese fire law testing. This collaboration between Kyocera and Osaka Gas continues a broader trend among Japanese utilities to integrate home batteries into balancing services. In March this year, Kyushu Electric Power launched a residential battery demand response pilot using home storage devices from Sharp; Tohoku Electric Power has been using Sharp's solar-linked home batteries for grid balancing since the end of 2025. Kyocera's Enerezza product line, launched in 2020, serves as the technological foundation for the Enerezza Plus II system and was the world's first residential battery system to use 24M's semi-solid electrode process.