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 technology of choice for stationary energy storage.

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 – Director

Darron is a mechanical engineer and MBA with over 30 years’ experience of senior and board level management, encompassing technology development, commercialisation and value realisation. His early career focused on advanced manufacturing within GEC plc. Post MBA he managed fashion and textile businesses in Japan and the UK prior to founding AIC, a cleantech business that IPO’d on the London AIM in 2007.


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 chemicals and 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 40 years of experience in financial markets. He was at CSFB for 17 years from 1988 to 2005, where he specialised in debt capital markets including distribution, origination, trading & structuring. Since 2005 he has been acting in a Non-Executive Directorship capacity for a number of Hedge Funds, Private Equity & Infrastructure Funds, for both listed and unlisted vehicles. He is former President of the Guernsey Chamber of Commerce and is a member of the Institute of Directors.

Rupert has extensive experience as both Director and Chairman of exchange listed and unlisted funds, chairing 9 of the funds, seven of which have been listed and 2 of which were FTSE250 companies.


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
E: nick.kitchin@cumulusenergystorage.com

US Enquiries
For more information please contact Darron Brackenbury, Director.

Cell: +1 (510) 213 1418
E: darron.brackenbury@cumulusenergystorage.com

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

M: +44 (0)7870 455995
E: nick.kitchin@cumulusenergystorage.com