Megablock

Overview

Utility-scale integrated energy storage solution unveiled in September 2025. Combines up to 4 Megapack 3 units with a transformer and switchgear into a single 20 MWh AC system. Achieves 23% faster installation and up to 40% lower construction costs compared to traditional deployments. 248 MWh per acre density; can deploy 1 GWh in 20 business days. 25-year / 10,000-cycle life. To be manufactured at the Houston Megafactory.

Unveiled September 2025. The Houston/Brookshire Megafactory began producing its sibling Megapack 3 unit on August 6, 2026, but Megablock production had not yet started as of early August 2026, with no updated date beyond Tesla's prior late-2026 target.

Key Specs