Canadian renewable developer Amp Energy’s efforts to sell its large development-stage battery storage business in the UK has stumbled, as two of the bidders involved are no longer interested in the assets.

The Carlyle-backed company, which is being advised on the process by BofA Securities, engaged in talks with Brookfield Infrastructure Partners and an unnamed utility company for its UK battery storage platform, Amp UK BESS, as well as its UK management team, sources said.

Talks with the utility company were inconclusive, while Brookfield also withdrew its involvement from the process some time ago, leaving the sale in limbo, according to the same sources.

Brookfield and BofA declined to comment. Amp did not respond to requests for comment.

BofA Securities distributed teasers in January, outlining that Amp was “exploring strategic options” for Amp UK BESS, in a process codenamed Project Avalon.

Amp UK BESS includes its UK management team, a 2 GW utility-scale battery pipeline as well as three two-hour battery projects in Scotland, each with 400 MW of capacity and due to be commissioned in 2024, according to the teaser.

The three Scottish projects were acquired from UK developer Steve Ruggi and have a combined development cost of around GBP 2.2bn, the teaser added.

These three projects, collectively called the Scottish Green Battery Complex, were described by Amp as “the largest transmission-connected batteries in the UK/Europe”.

Amp Energy was also looking to dispose of 1.4 GW of battery storage projects that are due to be linked to National Grid’s transmission network and a further 600 MW due to connected to lower voltage distribution networks.

Amp Energy’s chief investment officer and co-founder, Paul Ezekiel, told Infralogic at the time that “given the growth and the substantive size of the [UK] business, Amp is exploring financing options for this platform”.

It is not clear if the sale process has been ditched or temporarily put on hold.

The attempt by Amp to offload its UK operations came just over two years after Carlyle injected some USD 374m (GBP 297m) of equity into the business.