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Elon Musk emphasized that Tesla is now manufacturing its own transformers to mitigate global supply shortages and long lead times—often exceeding two years—especially critical for large-scale energy projects like the 1 GWh sites, which can power approximately 400,000 homes in just 20 days. The upcoming Houston Mega Factory is set to produce transformers starting late 2026, signifying Tesla's move towards greater self-sufficiency in energy infrastructure.