Cited sources
Last verified 2026-10-06.
- KYOCERA describes the cells as a semi-solid clay-type lithium-ion battery, with the electrolyte kneaded into the electrodes in advance; its 2024 release calls this cell type a world first, based on the company's own March 2021 survey.
- KYOCERA announced sales from spring 2024, and the product page still lists suggested retail prices for all three model codes with no discontinuation notice.
- It is a Japanese domestic specification: the maker says it cannot be used outside Japan and prohibits export.
- It cannot be scored yet: round-trip efficiency and an IP rating remain unestablished. Exact historical grid registration and communications conformity have been recovered, but a current grid-interconnection certification listing remains unresolved.
- The 20,000-cycle figure (about 60 per cent capacity remaining) is a maker estimate that depends on conditions, not a warranted value; the printed warranty is 15 years on equipment and capacity and 10 years for natural disaster cover.
- The page also shows Enerezza PlusⅡ as a related product; this record covers only the three codes above and is not joined to it.
- JET’s cancelled-registration list dated 25 August 2026, physical page 610, identifies MD-0067 for Kyocera, inverter MBS-590 and systems PVS-591, EGS-MC0550, EGS-MC1100 and EGS-MC1650. It records first registration on 11 June 2024 and a printed validity end of 22 February 2026. This is historical grid-interconnection protection and inverter registration evidence; it does not establish current approval.
- The exact entry is in the cancelled-registration list. The current active list in registration-number order reviewed did not supply an exact MC0550/1100/1650 entry. A current exact renewal or replacement registration is still needed. The cancelled entry does not state a cancellation date or reason; it does not establish a safety recall or a finding that the battery is unsafe.
- ECHONET’s GZ-001033 listing, dated 25 September 2025 under Appendix Release R.3, names EGS-MC0550, EGS-MC1100, EGS-MC1650 and PVS-591. It also references AIF registrations LZ-000465, LZ-000466, LZ-000467 and LZ-000468; their detailed declarations have not been separately reviewed. This establishes communications conformity within that listing’s scope, not current grid approval, battery fire certification, a public API or a firmware-support policy.
- These findings apply to the named Japanese Enerezza Plus MC0550/1100/1650 systems. The Plus II 0570/1140/1710 model families are separate and cannot renew these models by association. No overseas-market approval or comprehensive battery safety-test result is established by these registrations.
- KYOCERA product page: Enerezza Plus (Japanese)https://www.kyocera.co.jp/solar/products/enerezza-plus/
Prints the product name, the three model codes, the semi-solid clay-type cell description, the warranty periods, current suggested retail prices and the Japan-only use restriction.
- KYOCERA news release, 19 February 2024 (Japanese)https://www.kyocera.co.jp/newsroom/news/2024/002380.html
Announces sales from spring 2024 for the same three model codes and describes the battery as a semi-solid clay-type lithium-ion design.
- JET cancelled-registration list, 25 August 2026https://www.jet.or.jp/common/data/products/protection/masshou.pdf
Physical page 610: MD-0067, MBS-590, PVS-591 and exact EGS-MC0550/1100/1650. Printed validity end 22 February 2026; cancellation date/reason unstated. Historical grid registration, not current approval.
- ECHONET GZ-001033 communications conformityhttps://echonet.jp/introduce/gz-001033/
25 September 2025, Appendix Release R.3; exact EGS-MC0550/1100/1650 and PVS-591. Referenced AIF declarations unreviewed. Communications scope only, not grid or battery-fire approval.