Pentir Energy Storage Project

To view this page in Welsh please click below.

key numbers


/228MWh battery


battery containers (or equivalent)


acres of land (approx)


operational life

Current status

Site selection

Preliminary assessments, site design and community engagement

Planning application

Discharge of planning conditions




Lightsource bp is working on a proposal for an energy storage project at Pentir, Bangor, Gwynedd. We will fund and operate a 57MW/228MWh (4-hour duration) energy storage project connected into the local electricity network. The project will facilitate the integration of renewable energy into the grid, helping to support low-cost electricity and the enhanced reliability of the electricity grid.

We’ve chosen this site after careful consideration, and we have undertaken a wide range of environmental assessments to help shape our plans. These include landscape and visual, heritage, ecology, noise, flooding and more.

A key part of developing plans for the energy storage project is engaging with local communities, so we held an information event on 21st May between 3pm – 6pm at the Neuadd Bentref Rhiwlas Village Hall, Rhiwlas, Bangor, Gwynedd LL57 4GA, to display our plans and gather feedback. We sent out an information leaflet to the local community, as well as a press release to local newspapers, inviting interested parties to join us at the event. Members of the Lightsource bp team were on hand to answer any questions about the proposal.

Information & Resources

We will shortly be uploading more information on our plans for the Pentir  Energy Storage Project.

Click here to read the project information leaflet.

Click here to find out more about Lightsource bp energy storage projects in general. 

We’re committed to remaining open and engaged with the community during this process. Alternatively, we’re offering anyone who would like to discuss the project the chance to have a one-on-one discussion with our Environmental Planning team, either by phone or via video conferencing. Please use the form below to get in touch if you’d like to arrange this.

Get in touch

If you’d like to talk to us about the Pentir Energy Storage Project, simply fill out the form below and click “submit”.

Contact Form

The deadline for comments is Tuesday 4th June 2024.