Tesla Semi Battery Capacities Listed in Federal Regulatory Filing

The official production Tesla Semi battery sizes have been revealed for both trims in a public regulatory filing.

The details emerged through mandatory submissions to federal regulators that manufacturers must file before commercial deployment of heavy-duty electric vehicles. Exact kilowatt-hour figures were not immediately detailed in initial reporting of the filing but represent the first concrete look at the energy packs that will power the long-haul trucks once full-scale production ramps.

@SawyerMerritt reported the disclosure, which arrives as Tesla continues to expand its electric commercial vehicle lineup amid growing demand for zero-emission freight options.

The two-trim strategy allows the company to target different use cases, with one version likely optimized for maximum range and the other for higher payload or shorter-haul efficiency. Regulatory filings of this nature typically include technical specifications that inform safety certifications, efficiency ratings and infrastructure planning for fleet operators.

Battery size directly influences charging requirements, weight distribution and overall vehicle performance, factors that have been closely watched by the trucking industry since the Semi's initial unveiling.