In January 2007 EEStor stated in a press release "EEStor, Inc. remains on track to begin shipping production 15 kilowatt-hour Electrical Energy Storage Units (EESU) to ZENN Motor Company in 2007 for use in their electric vehicles.
"[8] In September 2007, EEStor co-founder Richard Weir told CNET production would begin in the middle of 2008.
[10] ZENN Motor Company (ZMC) denied there was a delay, just a clarification of the schedule, separating "development" and "commercialization".
[11] In March 2008 Zenn stated in a quarterly report a "late 2009" launch was scheduled for an EEStor-enabled EV.
[13] In July 2009 ZENN Motor Company invested an additional $5 million in EEStor, increasing its share of ownership to 10.7%.
[16] EEStor's claims for the EESU exceed by orders of magnitude the energy storage capacity of any capacitor currently sold.
For example, the thermochemical theory of polar molecular bond strengths has been confirmed to be valid for a wide range of low-
[18] EEStor reports a large relative permittivity (19818) at an unusually high electric field strength of 350 MV/m, giving 104 J/cm3 (103 Wh/L) in the dielectric.
[21] Northrop Grumman and BASF have also filed patents with similar theoretical energy density claims.
More recent testing reports from March 2017 are showing samples with CMBT ratios of over 80% and in that same report EEStor mentions plans for near term samples with thickness of 70 microns with plans for greater levels of densification with near complete densification.
[27][28] In April 2007, ZENN Motor Company, a Canadian electric vehicle manufacturer, invested $2.5 million in EEStor for 3.8% ownership and exclusive rights to distribute their devices for passenger and utility vehicles weighing up to 1,400 kg (excluding capacitor mass), along with other rights.
[13] By April 2010, Zenn had cancelled all production of electric vehicles, leaving ownership of EEStor and their rights to the technology as their focus.
[31] In January 2008, Lockheed-Martin signed an agreement with EEStor for the exclusive rights to integrate and market EESU units in military and homeland security applications.
Following the ZENN controlling ownership on May 19, Ian Clifford assumes role of CEO following the resignation of James Kofman.