CATL's TENER container is the industry's highest energy-density 20-ft BESS unit — 6.25 MWh in a single 20-ft footprint with 5-year zero-degradation guarantee. Here's the technical and commercial breakdown.
Energy
6.25 MWh
20-ft footprint
Cell
587 Ah LFP
self-developed
Zero-degradation guarantee
5 years
industry-first
CIF (May 2026, utility)
$88/kWh
container + BMS + PCS optional
Zero-degradation guarantee explained
CATL contractually warrants zero energy degradation from year 1 to year 5 through a combination of oversized cell headroom, active cell-level thermal management and augmentation top-ups. Post year-5 degradation follows a conventional linear curve to 70% at year 20.
Frequently asked questions
QIs TENER available without PCS?
Yes — DC block only is common for developers integrating third-party PCS (Sungrow, Sineng). Add ~$4/kWh for CATL-bundled PCS.
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