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About Us

Vision, Mission, Values

Our strategy developed from asking our customers what they needed. Rather than scale-up from ‘mobile’ batteries, or new chemistries developed in the laboratory, our strategy 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, rechargeable Copper/Zinc super-storage batteries with the lowest levelised cost of storage (LCOS) 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 30 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. Darron’s early career focused on advanced manufacturing within GEC plc.


Cumulus is fortunate to have very supportive business angel investors, many of whom have reinvested in subsequent rounds.

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.


Cumulus Energy Storage Ltd’s registered office and European commercial centre is in the Sheffield city region of the UK.

What Can I Do Next…

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

M: + 44 (0) 7870 455995

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

Cell: + 1 (510) 374 4581