The FORTELION lithium ion secondary batteries used in the energy storage module employ olivine type lithium iron phosphate cathodes with a stable crystalline structure that is very resistant to breakdown, and this solid structure makes the battery extremely unlikely to experience thermal runaway even if an unexpected power supply accident or disaster should occur.
FORTELION is the first lithium ion secondary battery to obtain fire protection certification (storage battery equipment type approval certified) under the technical standards of the Fire Service Act of Japan, and is the first in Japan to obtain the international standard UL9540A report.
Furthermore, this level of safety means that unlike conventional lithium ion batteries, FORTELION batteries can be used in densely populated locations such as office buildings. The energy storage module can be installed in settings with narrow gaps between battery panels and where space is limited.