Tesla Megapack & Megablock at Brookshire

Overview

Tesla's Third Megafactory

Select a program in the chart above to show its suppliers in the ring.

Tesla's Brookshire site leases Buildings 9 and 10 at Empire West in Waller County, about 35 miles west of Houston: 1.65 million sq ft, with a 600,000 sq ft building planned. It is Tesla's third Megafactory after Lathrop, California and Shanghai, and the first line built for Megapack 3 and Megablock. Production started in September 2026, with deliveries from late 2026 and a planned 50 GWh a year, more than Lathrop or Shanghai at about 40 GWh each.

Tesla committed about $200M to the Megapack factory under a Waller County abatement tied to hiring: 375 jobs by the end of 2026, 750 by 2027 and 1,500 by 2028.

Megablock

Tesla as Grid Equipment Maker

A conventional storage project buys battery containers from one vendor and transformers, switchgear and cabling from others. The Megablock ships four packs with the transformer and switchgear already integrated, and Tesla is building the transformers and power electronics itself at Brookshire. That moves into Tesla's bill of materials equipment the project developer would otherwise buy, at a time when transformer lead times are one of the main delays on the Texas grid.

The silicon carbide switches in the inverters come from onsemi and Wolfspeed fabs in New York; ABB, Eaton, Hitachi Energy, Schneider Electric and S&C supply the grid-side gear.

Solar

The Solar Factory Is Not at Brookshire

Reports in May 2026 placed a Tesla solar factory at Brookshire, next to the Megafactory. The plant Tesla has actually filed for is elsewhere: Project Crystal Sun, a $10.1B application under the state JETI program for a site of about 3,050 acres at FM 1994 and FM 762 south of Richmond in Fort Bend County, about 40 minutes south-southeast of Brookshire. NRG's W.A. Parish Generating Station, one of the largest power plants in Texas, sits just east of the site. Drone footage from August 2026 shows the site as bare land. It covers ingot, wafer, cell and module production, with 9,712 permanent jobs and commercial output in Q1 2029. Lamar Consolidated ISD approved the tax deal 7-0, but the site is not final: the filing says Tesla is weighing it against another site outside Texas.

AustinIO treats the Brookshire reports and Crystal Sun as one project. Production lines for it are expected to include heterojunction equipment from Suzhou Maxwell, part of about $2.9B of Chinese solar equipment Tesla was reported in March 2026 to be buying, which needs Chinese export approval.

The supplier ring

The Brookshire Supplier Ring

Each supplier placed by distance from Brookshire and what it supplies.

• United States
• Europe
• Japan
• China

The ring maps 40 suppliers in three wedges. The cell wedge is where China sits today: Megapack 3 uses LFP cells, and the dataset lists CATL and BYD as announced suppliers, along with Tesla's Shanghai Megafactory. They are the largest tax credit risk on the sheet, since cells from a foreign entity of concern lose the 45X manufacturing credit. Tesla's own LFP line in Nevada and LG Energy Solution's LFP cells from Michigan are the domestic alternatives.

In all, three suppliers are Chinese.

Shared across anchors

Suppliers Shared With Other Texas Anchors

Giga Texas shares by far the most, 22 companies, from the robot makers to the cell suppliers and the silicon carbide fabs; Samsung Taylor shares 7, mostly industrial gases and electrical gear. T1 Energy's G2 Austin shares four, the industrial gas suppliers and Quanta's electrical work.

Constraints

Cells

Cell supply sets the pace. Fifty GWh a year needs more LFP cells than Tesla makes in the US today, and the cheapest are Chinese. Every shift toward Nevada or LG Michigan cells protects the 45X credit but takes time to qualify.

Related coverage

Related Coverage

• Texas BESS Concentration
• Tesla Robstown Lithium Refinery
• Tesla Giga Texas
• T1 Energy G2 Austin
• ERCOT Large Load Interconnection
• Behind-the-Meter Power