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Batteries took 58% of Thailand's approved EV supply-chain investment
Thailand's Board of Investment reported THB 137.7 billion in approved electric vehicle supply-chain projects through June 2025. Battery manufacturing accounted for THB 80.1 billion, compared with THB 41.08 billion for battery electric vehicle production.
Sources checked
Battery production and vehicle manufacturing together account for about 88% of the published total.
The largest investment category was upstream
Battery production included both module and cell projects. Its THB 80.1 billion across 53 projects was nearly twice the THB 41.08 billion in the separate battery electric vehicle production category. The allocation gives a view of planned supply-chain investment alongside vehicle assembly. Source 1
Project count and investment give different rankings
The board recorded 42 projects in other key parts, twice the vehicle production category's 21 projects. Those parts projects accounted for THB 6.52 billion, roughly one sixth of the investment in vehicle production. A project count gives small and large investments equal weight. Source 1
Capacity and registrations measure different stages
The 21 approved vehicle production projects listed combined rated capacity of 386,000 units per year. Thailand recorded 57,289 new battery electric passenger car registrations in the first half of 2025. One figure measures planned production capacity, while the other records a six-month flow into the local vehicle register. Source 1
Infrastructure figures use two different snapshots
The board lists approved investment in charging and swapping projects. It separately recorded 3,720 operating charging stations and 11,622 installed chargers as of March 2025. An operating site can have multiple chargers, and the approved project count is not an operating-site total. Source 1