Geely says its next-generation solid-state EV battery will reach an energy density of up to 500 Wh/kg, and it’s already running the cells through real-world validation ahead of a pilot rollout in 2027.
That number is the whole story. At 500 Wh/kg, Geely’s cells would hold roughly twice the energy per kilogram of the best lithium-ion battery packs shipping in EVs today.
Why 500 Wh/kg is such a big number
The best high-nickel NMC cells in production EVs land around 250 to 300 Wh/kg at the cell level. Tesla’s 4680 sits near 245 Wh/kg. LFP cells, the chemistry powering most affordable EVs, come in lower still. At the pack level, once these cells are in modules and pack, the enegery density per kg drops even further.
Zeekr’s current “Golden Brick” LFP pack is rated around 128 Wh/kg at the pack level.
