Former gridscale Battery manufacturer
UniEnergy Technologies (UET) was a U.S. vanadium redox flow battery manufacturer in Mukilteo, Washington, which manufactured megawatt-scale energy storage systems for utility, commercial and industrial customers. The company was founded in 2012 by Dr. Gary Yang and Dr. Liyu Li to commercialize a new Vanadium electrolyte formulation the pair had developed while working at Pacific Northwest National Laboratory. The new formulation, a mixed-acid solution, was patented by PNNL and the patent was licensed to UET for commercialization. The mixed-acid vanadium electrolyte allows for a wider temperature range for operations, and double the energy density of the traditional vanadium electrolyte. 
The company had designed a megawatt-scale flow battery using this new electrolyte for the purpose of allowing rapid deployment, manufacturing repeatability and lower costs. The company also employed an R&amp;D team which worked to make advances on the electrolyte chemistry and stack design.
UET had a subsidiary in Germany, Vanadis Power which provides sales and services for Europe. The company had partnerships with Bolong New Materials, a vanadium electrolyte manufacturer, and Rongke Power, the Chinese vanadium flow battery stack manufacturer. In December 2015 the company completed their B round funding series which included a major investment from Orix Corp. In October 2021, UniEnergy filed for involuntary Chapter 11 bankruptcy, listing no assets or debts.
Products.
UniEnergy sold a 10kW, 34kWh fully integrated flow battery called the ReFlex. This product was sized to be a building block for commercial and utility scale deployments from kilowatts to multi-megawatt installations. 
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