Cited sources
Last verified 2026-09-25.
- Kyocera describes this as a semi-solid clay-type lithium-ion storage system and says, based on its own research, that it was the first in the world to mass-produce this battery type.
- Kyocera's 24 March 2026 release says sales begin from spring 2026, and the product page says the units are built to Japanese domestic specification and cannot be used outside Japan.
- The 20,000 cycle figure is Kyocera's count to 60% of rated capacity under its own test conditions, not a warranted value; the warranty is 15 years for equipment and capacity, with a retained capacity guarantee of SOH 65% or more.
- It cannot be scored yet because the cited Kyocera pages give no round-trip efficiency or IP rating, cite no IEC or UL certification, and state no warranty throughput limit.
- A separate high-voltage public and industrial version sold under the same name is not covered here, and this record is not joined to any scored battery.
- Legal manufacturer as printed: 京セラ株式会社 (issuer of the release and named trademark holder on the product page).
- KYOCERA product page: Enerezza PlusⅡ (Japanese)https://www.kyocera.co.jp/solar/products/enerezza-plus-2/
Prints the product name, the nine residential model codes across multi-input, hybrid and single-function types, the semi-solid clay-type battery claim, the 20,000 cycle figure with its 60% test footnote, the 15 year equipment and capacity warranty table, and the Japan-only use statement.
- KYOCERA news release, 24 March 2026 (Japanese)https://www.kyocera.co.jp/newsroom/news/2026/002977.html
States that sales begin from spring 2026, that the system uses semi-solid clay-type lithium-ion cells Kyocera says it was first to mass-produce, the 5.7, 11.4 and 17.1 kWh rated capacities, and the SOH 65% or more capacity guarantee over 15 years.
- KYOCERA solar and storage product list (Japanese)https://www.kyocera.co.jp/solar/products/
Lists Enerezza PlusⅡ as a current Kyocera lithium-ion storage system.