--- title: "Battery Storage for the National Trust, Gibson Mill" id: "1024" type: "post" slug: "battery-storage-for-the-national-trust-gibson-mill" published_at: "2025-09-30T17:01:42+00:00" modified_at: "2026-02-23T16:32:12+00:00" url: "https://dulas.org.uk/battery-storage-for-the-national-trust-gibson-mill/" markdown_url: "https://dulas.org.uk/battery-storage-for-the-national-trust-gibson-mill.md" excerpt: "[fusion_builder_container type=\"flex\" hundred_percent=\"no\" hundred_percent_height=\"no\" min_height_medium=\"\" min_height_small=\"\" min_height=\"\" hundred_percent_height_scroll=\"no\" align_content=\"stretch\" flex_align_items=\"flex-start\" flex_justify_content=\"flex-start\" flex_wrap_medium=\"\" flex_wrap_small=\"\" flex_wrap=\"wrap\" flex_column_spacing=\"20px\" hundred_percent_height_center_content=\"yes\" equal_height_columns=\"yes\" container_tag=\"div\" menu_anchor=\"\" hide_on_mobile=\"small-visibility,medium-visibility,large-visibility\" status=\"published\" publish_date=\"\" class=\"\" id=\"\" margin_top_medium=\"\" margin_bottom_medium=\"\" margin_top_small=\"\" margin_bottom_small=\"\" margin_top=\"0px\" margin_bottom=\"0px\" padding_top_medium=\"\" padding_right_medium=\"\" padding_bottom_medium=\"\" padding_left_medium=\"\" padding_top_small=\"\" padding_right_small=\"\" padding_bottom_small=\"\" padding_left_small=\"\" padding_top=\"\" padding_right=\"0px\"..." taxonomy_category: - "Battery Storage" --- # Battery Storage for the National Trust, Gibson Mill **Project Overview** Electrical energy generated by two hydro turbines and a solar array is stored in a large battery bank. Energy is delivered from the battery to the various loads on the site (cafe, visitor centre, warden’s accommodation). Solid state inverters convert the electrical supply from 48Vdc as stored in the battery to 230Vac for efficient distribution and so that standard appliances can be used around the site. **Implementation** Sensitive and sympathetic system design lessened the impact of the modern energy equipment on the fabric of the building. All changes to the buildings had to be approved by National Trust committees in addition to obtaining the necessary planning permissions for this grade 1 listed building. Information is presented both to the site warden and to visitors to the site about the power being generated from the various sources and consumption around the site. In addition, a “fuel gauge” provides continuous feedback about the amount of energy availability from the battery bank. This detailed feedback enables the site warden to manage the various energy demands in response to the available hydro and solar energy and the visitor schedule for the days ahead. “Gibson Mill is a unique building. Its size, function and lack of connection to the National Grid all added to the complexity in making the site work efficiently on renewable energy. Dulas’ expert knowledge and years of experience were significant in the transformation of this site into a focal point for groups looking to do similar projects. The renewable energy schemes will help pull hundreds of extra visitors into this area, every year.” **Guy Laurie – National Trust** **Conclusions** The multi award winning flagship project for the National Trust is now 100% self-sufficient in renewable energy. Technical OverviewIntake StructureDrop Bar side intakePipelineLeat to Mill pondHead16ftPowerhouseOriginal Mill BuildingTurbine1929 Gilkes wallplateGenerator15kVA, single phase, 1500rpmTailrace and OutfallOriginal stone calvertSolar PV4.32kWpBattery2300 Ah By [Dulas Group](https://dulas.org.uk/author/dulas/) Published On: September 30, 2025 Share: [https://www.facebook.com/sharer.php?u=https%3A%2F%2Fdulas.org.uk%2Fbattery-storage-for-the-national-trust-gibson-mill%2F&t=Share%3A](https://www.facebook.com/sharer.php?u=https%3A%2F%2Fdulas.org.uk%2Fbattery-storage-for-the-national-trust-gibson-mill%2F&t=Share%3A) [https://x.com/intent/post?text=Share%3A&url=https%3A%2F%2Fdulas.org.uk%2Fbattery-storage-for-the-national-trust-gibson-mill%2F](https://x.com/intent/post?text=Share%3A&url=https%3A%2F%2Fdulas.org.uk%2Fbattery-storage-for-the-national-trust-gibson-mill%2F) [https://www.linkedin.com/shareArticle?mini=true&url=https%3A%2F%2Fdulas.org.uk%2Fbattery-storage-for-the-national-trust-gibson-mill%2F&title=Share%3A&summary=Project%20Overview%0D%0A%0D%0AElectrical%20energy%20generated%20by%20two%20hydro%20turbines%20and%20a%20solar%20array%20is%20stored%20in%20a%20large%20battery%20bank.%20Energy%20is%20delivered%20from%20the%20battery%20to%20the%20various%20loads%20on%20the%20site%20%28cafe%2C%20visitor%20centre%2C%20warden%E2%80%99s%20accommodation%29.%20Solid%20state%20inverters%20convert%20the%20electrical%20supply%20from%2048Vdc%20as%20stored%20in%20the%20battery%20to%20230Vac%20for%20efficient](https://www.linkedin.com/shareArticle?mini=true&url=https%3A%2F%2Fdulas.org.uk%2Fbattery-storage-for-the-national-trust-gibson-mill%2F&title=Share%3A&summary=Project%20Overview%0D%0A%0D%0AElectrical%20energy%20generated%20by%20two%20hydro%20turbines%20and%20a%20solar%20array%20is%20stored%20in%20a%20large%20battery%20bank.%20Energy%20is%20delivered%20from%20the%20battery%20to%20the%20various%20loads%20on%20the%20site%20%28cafe%2C%20visitor%20centre%2C%20warden%E2%80%99s%20accommodation%29.%20Solid%20state%20inverters%20convert%20the%20electrical%20supply%20from%2048Vdc%20as%20stored%20in%20the%20battery%20to%20230Vac%20for%20efficient) [https://api.whatsapp.com/send?text=https%3A%2F%2Fdulas.org.uk%2Fbattery-storage-for-the-national-trust-gibson-mill%2F](https://api.whatsapp.com/send?text=https%3A%2F%2Fdulas.org.uk%2Fbattery-storage-for-the-national-trust-gibson-mill%2F) [mailto:?subject=Share%3A&body=https%3A%2F%2Fdulas.org.uk%2Fbattery-storage-for-the-national-trust-gibson-mill%2F](mailto:?subject=Share%3A&body=https%3A%2F%2Fdulas.org.uk%2Fbattery-storage-for-the-national-trust-gibson-mill%2F) Battery Buffered EV Charger Battery Buffered EV Charger [Read more](https://dulas.org.uk/battery-buffered-ev-charger/) Dulas forging ahead with solar powered car charger Dulas forging ahead with solar powered car charger [Read more](https://dulas.org.uk/dulas-forging-ahead-with-solar-powered-car-charger/) Approval given for Bishampton solar farm Approval given for Bishampton solar farm [Read more](https://dulas.org.uk/approval-given-for-bishampton-solar-farm/) Planning consent obtained for solar farm at West Beacon Farm Planning consent obtained for solar farm at West Beacon Farm [Read more](https://dulas.org.uk/planning-consent-obtained-for-solar-farm-at-west-beacon-farm/) Battery Storage Design and Installation for Swansea University Battery Storage Design and Installation for Swansea University [Read more](https://dulas.org.uk/battery-storage-design-and-installation-for-swansea-university/) PV Power and Energy Storage at St. Peter’s Hospital, Likoma Island, Malawi PV Power and Energy Storage at St. Peter’s Hospital, Likoma Island, Malawi [Read more](https://dulas.org.uk/pv-power-and-energy-storage-at-st-peters-hospital-likoma-island-malawi/)