Deals Counterparts

Anglesey Mining partners with RheEnergise for hydro-power storage project

Partnership Storage announced United Kingdom Feb 25, 2026
development
Stage

Anglesey Mining partners with RheEnergise to progress development of a hydro-power storage project in one of the shafts at the Parys Mountain mine. The energy storage system is akin to normal pumped storage but uses a high-density fluid for greater efficiency in limited spaces with the site set to be the first commercial deployment of the High Density Hydro System.

Deal Analysis

Anglesey Mining's partnership with RheEnergise and Black Mountain Energy Storage to develop a hydro-power storage project at the Parys Mountain mine represents a novel approach to energy storage. The project aims to be the first commercial deployment of RheEnergise's High Density Hydro System, which offers greater efficiency in limited spaces compared to traditional pumped storage. This partnership leverages Anglesey Mining's existing infrastructure and RheEnergise's innovative technology, potentially creating a valuable asset for grid stabilization and renewable energy integration. Black Mountain Energy Storage's involvement further strengthens the project's development and operational expertise. While the financial details and capacity of the project remain undisclosed, the partnership's focus on a first-of-its-kind technology and the involvement of a dedicated energy storage developer (Black Mountain Energy Storage) suggest a significant commitment to advancing energy storage solutions. The successful implementation of this project could serve as a model for repurposing existing mining infrastructure for energy storage, offering a sustainable and cost-effective alternative to greenfield developments. The project's location in the United Kingdom further underscores the growing demand for energy storage solutions to support the country's renewable energy targets.
  • First commercial deployment of RheEnergise's High Density Hydro System.
  • Partnership leverages existing mining infrastructure for energy storage.
  • Involvement of Black Mountain Energy Storage adds development and operational expertise.
  • Project located in the United Kingdom, a market with growing demand for energy storage.
Market Context: The energy storage sector is experiencing rapid growth, driven by the increasing need for grid stabilization and integration of renewable energy sources. The United Kingdom is actively pursuing energy storage solutions to meet its decarbonization goals.

Source Intelligence

KEY DETAILS

Energold invested £350,000 in exchangeable warrants in Anglesey at 7.6p in December as part of the restructuring. If Energold exercise all its warrants it would hold 26.6% of the enlarged share capital of Anglesey.

Location
The restructuring now leaves management free to focus on its Parys Mountain copper-zinc-lead-gold project in Anglesey.
Financials
The sale effectively wipes out ~£4m in debt owed to Energold off the Anglesey balance sheet.
Announcement
SP Angel -Today’s Market View, Wednesday 25th February 2026
PARTIES MENTIONED IN SOURCE
A
Anglesey Mining developer

"Anglesey Mining report th restructuring of and refocussing of their mineral portfolio."

R
RheEnergise developer

"Continuing to develop our plans for an innovative pumped storage scheme with RheEnergise"

E
Energold investor

"Energold also invested £350,000 in exchangeable warrants in Anglesey at 7.6p in December as part of the restructuring."

medium quality Enriched Feb 26, 2026

Timeline

Announced
Feb 25, 2026
Signed
Closed

Market Context

This deal is part of the Storage sector in United Kingdom.
117
Storage deals
100
deals in United Kingdom
1 of 110 Storage deals tracked this month · Updated daily

Stay informed

Weekly infrastructure deal intelligence — PPAs, acquisitions, data centers, and more.

Subscribe to Newsletter