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Private company

Ener1

United States energy storage device company

Enerdel was an American company that developed energy storage technology based on building compact lithium-ion-powered batteries for the transportation, utility grid and industrial electronics markets. The company was headquartered in Greenfield, Indianapolis, Indiana, and had manufacturing locations in the United States and Korea. Enerdel also develops commercial fuel cell products and nanotechnology-based materials.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

2004Founded1

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Enerdel was an American company that developed energy storage technology based on building compact lithium-ion-powered batteries for the transportation, utility grid and industrial electronics markets.2

The story

Enerdel was founded in 2004 to focus on electrical batteries for heavy-duty transportation, and on and off-grid electrical storage.

Ener1 filed for Chapter 11 bankruptcy protection on January 26, 2012. It completed restructuring of its debt and emerged from bankruptcy on March 30, 2012.

Ener1 received a $118.5 million grant from the Department of Energy in 2010 via the American Recovery and Reinvestment Act of 2009. The company traded on the over the counter market under the symbol HEV. It was de-listed from the NASDAQ Stock Market on October 28, 2011 prior to its January 2012 bankruptcy filing.

The remains of the company was acquired by its former director Paul Herbert, through his company PLH Energy in 2022. In July 2023, Enerdel filed for Chapter 7 bankruptcy liquidation after laying off most of its staff.

From Wikipedia’s article on Enerdel, shared under CC BY-SA 4.0.3

Timeline

  1. 2004Founded Founded1

Sources

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