# Mullen and Enpower Greentech partner to build semi solid-state batteries

Mullen Automotive has signed a Partnership and Supply Agreement with Enpower Greentech Inc. to manufacture EGI's SWIFT series semi solid-state batteries at Mullen's Fullerton, California facility, with production slated to begin early 2026.

- Type: Partnership
- Announced: 2025-04-09
- Where: Fullerton, California, United States
- Status: announced
- Products: semi solid-state batteries, SWIFT series SSB, battery modules, battery packs
- Sectors: [Automotive Components](https://endata.com/sectors/automotive-components.md), [Semiconductors and Industrial Electronics](https://endata.com/sectors/semiconductors-electronics.md)

## Companies

- [Mullen Automotive](https://endata.com/companies/67361.md) (partner)
- [Enpower Greentech Inc.](https://endata.com/companies/84065.md) (partner)

## Sources

- [business.woonsocketcall.com](https://business.woonsocketcall.com/observerreporter/article/gnwcq-2025-4-9-mullen-and-enpower-greentech-inc-enter-partnership-and-supply-agreement-to-build-egis-swift-series-of-semi-solid-state-batteries), 2025-04-09: "By partnering with EGI, Mullen continues to build its portfolio and is positioned to deliver domestically produced battery solutions, which has been Mullen's vision since its inception."

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Data from Endata (https://endata.com/). Announcements are summarized from public sources and may be incomplete; check the linked originals.