--- title: Landfill to Solar Farm description: Designing and building a 6.45 MWp solar farm on a restored landfill in Kildare. image: https://entegro.com/hubfs/CS_Sretaw-Landfill_hero.webp --- [Skip to main content](https://entegro.com/projects/landfill-to-solar-farm#main) [![Entegro](https://entegro.com/hs-fs/hubfs/raw_assets/public/stoicaXentegro/images/entegro-logo.png?width=59&height=64&name=entegro-logo.png)](https://entegro.com?hsLang=en) - [Telecoms](https://entegro.com/telecoms?hsLang=en) - [Energy & Power](https://entegro.com/energy-and-power?hsLang=en) - [Case Studies](https://entegro.com/projects?hsLang=en) - About ![](https://entegro.com/hubfs/raw_assets/public/stoicaXentegro/images/nav-chevron.svg) - [About Entegro](https://entegro.com/about-entegro?hsLang=en) - [People and culture](https://entegro.com/people-and-culture?hsLang=en) - [Careers](https://careers.entegro.ie/) - [Insights](https://entegro.com/insights?hsLang=en) - [Get in touch](https://entegro.com/contact-us?hsLang=en) [Get in touch](https://entegro.com/contact-us?hsLang=en) Case study # Landfill to Solar Farm Designing and building a 6.45 MWp solar farm on a restored landfill in Kildare. --- - Sretaw - Landfill - Kildare, Ireland - Ground Mounted Solar Farm ![Aerial view of a large solar farm with rows of ground-mounted panels set in green countryside](https://entegro.com/hs-fs/hubfs/CS_Sretaw-Landfill_hero.webp?width=1374&height=461&name=CS_Sretaw-Landfill_hero.webp) 5,025 MWh Energy generation per year 1,278 tonnes/year CO₂ savings 6,450 kWp Project size The challenge ## Building on ground that moves Ground stabilisation presented a significant challenge due to uneven ground conditions and ongoing settlement, requiring a solution that distributed loads effectively without penetrating or compromising the landfill cap. ![Rows of ground-mounted solar panels on a grassy field, with an inverter and electrical box fixed to the mounting frame](https://entegro.com/hs-fs/hubfs/CS_Sretaw-Landfill_challenge.webp?width=1082&height=1623&name=CS_Sretaw-Landfill_challenge.webp) ## Our approach The approach was an engineering led solution by the ACEL Energy team combining the ballasted solar farm with a bespoke mounting system taking into account the ground conditions. 01 ### Audit & Assess The approach was to develop and construct the foundation system entirely on-site to accommodate the challenging and unpredictable ground conditions associated with landfill environments. ![](https://entegro.com/hubfs/raw_assets/public/stoicaXentegro/images/approach-arrow-right.svg) 02 ### Design This allowed the modular ballast blocks and interconnected lattice structures to be assembled, positioned, and adjusted according to site-specific requirements. ![](https://entegro.com/hubfs/raw_assets/public/stoicaXentegro/images/approach-arrow-right.svg) 03 ### Migrate The design focused on distributing loads across the landfill surface without penetrating or compromising the protective cap. ![](https://entegro.com/hubfs/raw_assets/public/stoicaXentegro/images/approach-arrow-right.svg) 04 ### Decommission Through iterative design, on-site assembly, and testing, the system was refined to improve structural stability, accommodate ongoing ground settlement, and withstand wind loading and environmental exposure while maintaining the long-term integrity of the solar array. ![](https://entegro.com/hubfs/raw_assets/public/stoicaXentegro/images/approach-arrow-right.svg) 05 ### Rationalise The electrical infrastructure was delivered overground using a combination of the solar mounting and cable tray to the respective transformer station. The outcome ## A capped landfill, turned into 6.45 MWp of clean power. The project delivered a 6.45 MWp ground-mounted solar farm on a 25-hectare restored landfill site in Kildare in 2026. The installation incorporates 1,845 ballast bases to provide stability on challenging ground, generating an estimated 5,025 MWh of electricity annually and saving 1,278 tonnes of CO₂ per year. The project demonstrates how restored landfill land can be repurposed to generate clean, renewable electricity, supporting decarbonisation, improving land utilisation, and delivering long-term environmental benefits. > “ACEL Energy were a pleasure to work with from start to finish. Their team were fantastic, with great engineering, design and project management throughout. Everything ran smoothly, and the project was delivered on time. We couldn't have asked for a better team to work with.” Brendan Traynor, Director of Operations Sretaw ## About Sretaw Stretaw, an established waste management business, sought to explore alternative uses for a capped landfill site as landfill gas reserves continued to decline. With restrictions limiting future use of the land, Stretaw identified solar energy as an opportunity to repurpose the site and support renewable energy generation. ![Sretaw Logo](https://entegro.com/hs-fs/hubfs/sretaw-contained.webp?width=1082&height=1623&name=sretaw-contained.webp) ## Related work ![National Broadband Ireland – Survey and Design](https://entegro.com/hs-fs/hubfs/CS_NBI_hero.webp?width=1368&name=CS_NBI_hero.webp) Telecoms 230K+ premises designed ### Designs for more than 230,000 premises under the National Broadband Plan [View case study](https://entegro.com/projects/survey-and-design?hsLang=en) ![Colleague pointing at a network route map on a computer screen](https://entegro.com/hs-fs/hubfs/supplied%20wind%20imagery%20(4).webp?width=1392&height=520&name=supplied%20wind%20imagery%20(4).webp) Start a conversation ## Got land to repower? Talk to our team about turning a capped or restricted site into a working solar farm. 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