# A 500 MWh Tesla Megapack battery just went live in Texas

> Tesla Megapacks are now helping support the Texas grid at Ørsted’s new 250 MW/500 MWh Old 300 battery storage project. Old 300 Storage in Needville, southwest of Houston, is fully connected to the ERCOT grid.

- **Source:** [Electrek](https://electrek.co/2026/08/06/tesla-megapack-power-orsted-big-new-texas-grid-battery/?utm_source=gearopen.com&utm_medium=referral&utm_campaign=feed&utm_content=6a7524e3941e5dc54dd0839d)
- **Published:** 2026-08-07
- **Category:** Cars
- **Tags:** #tesla
- **Canonical:** http://localhost:4321/a/6a7524e3941e5dc54dd0839d

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_GearOpen's distilled summary. The full original article is published at Electrek (source link above); GearOpen does not republish the source's full text._