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About Us

Vision, Mission, Values

Our vision developed from asking our customers what they needed. Rather than scale-up from ‘mobile’ batteries, or new chemistries developed in the laboratory, our vision for a grid-scale battery was to take a large-scale industrial process and adapt it to our purpose for stationary energy storage.

Using chemistries and architectures already used for 50 years in the mining industry at ~100 MWh scale equivalent, we have developed a rechargeable Copper/Zinc battery that is safe, reliable and sustainable, and offers class-leading Total Cost of Ownership to our customers.

Our unique technology will play a significant role in improving the economics of renewable generation and transforming energy markets.

Our vision is: To be the leading manufacturer and developer of grid-level energy storage batteries with the lowest levelised cost of energy (LCOE) globally.

Our core purpose is: ‘enabling renewable electricity’

Our values are: Innovation, Trust, Professionalism, Enjoyment and Employee Development

Management Team    

Cumulus management team has a blend of experience in business, engineering, electrochemistry and over 20 years of battery development.

Nick Kitchin – Chief Executive Officer

Nick has 30 years’ experience as a general manager, chartered engineer, MBA and strategy consultant. His operations and management experience includes chemicals and plastics manufacturing with Shell Chemicals, Amalgamated Plastics and as General Manager (300 employees) at polyurethane foam manufacturer Carpenter.  Nick’s consulting background includes strategy consulting to over 250 SME’s in the UK across a wide range of industries and growth companies.

Darron Brackenbury – Chief Operations Officer

Darron is a mechanical engineer and MBA with over 20 years’ experience of senior and board level management encompassing technology development, commercialization and value realization.  Darron was a founder of Applied Intellectual Capital (AIC), a clean-tech start up IPO’d on the London AIM in January 2007 as an electrochemical platform developing advanced battery systems and mineral processing technology. Darron’s early career focused on advanced manufacturing development (turbomachinery) within GEC plc.

Michael Hurwitz – Chief Technology Officer

Michael has a Masters level Chemistry education and specialises in synthetic and analytical chemistry with a focus on electrochemistry. During his time at AIC as Director of Chemistry, he worked in the mining, energy-storage and consulting divisions. He is currently responsible for technology development of the Cumulus battery system and is the primary inventor on the patents.


Cumulus is fortunate to have very supportive business angel investors, many of whom have reinvested in the second-seed round.

Matthew O’Dowd – Investor Director

Originally from a finance background, Matthew moved to London from Dublin and into the hotel Industry where he quickly found his forte in turnaround situations which led to him to lead his first MBO. Currently he is a significant Investor & Director in a number of private companies ranging from flat pack furniture, Chemicals, aerosols to property investment. Matthew brings a wealth of experience in providing strategic guidance and leadership to SMEs. He fulfills the role of non-executive director by challenging and helping the senior management team deliver on its strategic objectives.

Rupert Dorey - Lead Investor

Rupert has over 30 years of experience in financial markets, principally in debt capital markets including distribution, origination and trading and structuring. He held a number of senior positions at Credit Suisse First Boston, including establishing CSFB's high yield debt distribution business in Europe, fixed income credit product coordinator for European offices and head of UK Credit and Rates Sales. Since 2005 he has been a Non-Executive Director specializing in Private Equity, Infrastructure and Hedge Funds. He currently chairs a FTSE 250 Infrastructure company.


CES Ltd’s registered office and European commercial center is in the Sheffield city region of the UK, which will also be the home of our planned pilot 1MWh/month manufacturing facility. Our CES Inc. US facility in San Francisco Bay Area (Oakland) is home to our R&D center, US commercial center and current prototype manufacture.

What Can I Do Next…

UK Enquiries
For more information please contact Nick Kitchin, Chief Executive Officer.

T: +44 (0) 1142 541240
M: + 44 (0) 7870 455995

US Enquiries
For more information please contact Darron Brackenbury, Chief Operating Officer.

T: + 1 (510) 374 4593
D: + 1 (510) 374 4581