Japan · Recalls · Issue #4 · 28/09 – 04/10
Japan recalls selected Nichicon ESS-T3 home battery units after fire and smoke
Japan's METI has recorded a Nichicon inspection-and-replacement recall for selected ESS-T3 home battery units after fire and smoke linked to battery-cell thermal runaway. Eight battery-unit model numbers are listed; owners should check their serial number with Nichicon rather than assume every ESS-T3 unit is affected.
What the primary source says
Japan's Ministry of Economy, Trade and Industry (METI) records a recall dated 24 September 2026 for Nichicon lithium storage batteries used in the ESS-T3 series of home tri-hybrid storage systems. METI says fire and smoke following battery-cell thermal runaway prompted inspection and replacement of affected batteries.
The listed battery-unit models are ES-T3MCK, ES-T3XCK, ES-T3S1, ES-T3L1, ES-T3M1, ES-T3X1, ES-T3SS and ES-T3LS. METI reports 15,534 affected units and a sales period from 11 April 2022 to 24 September 2026. Not every unit bearing one of these model numbers is necessarily affected: Nichicon provides an official serial-number checker and arranges the inspection and replacement. Owners in Japan should check the exact battery-unit serial number and follow Nichicon's instructions. This Japanese action is not evidence of a UK recall.
Source: Ministry of Economy, Trade and Industry, Japan, Nichicon lithium storage battery recall, 24 September 2026: https://www.meti.go.jp/product_safety/recall/file/260924-1.html . The Consumer Affairs Agency also records the action under management number 00000035867: https://www.recall.caa.go.jp/result/detail.php?rcl=00000035867&screenkbn=01 . Independently summarised and translated by FOLO-UP; no agency or manufacturer endorsement.
Why it matters
The useful distinction
The ESS-T3 series name alone is not enough to identify an affected home battery. The eight unit model numbers and official serial-number checker allow a more reliable match before arranging inspection and replacement.
This briefing is an independent summary of the evidence sources below. Context-only links are not used as factual authority. It does not establish that a product, organisation or listing is unsafe, unlawful or non-compliant beyond what the evidence reports.