With Your Eco, National Trust Heelis Head Office in Swindon Removes & Upgrades to a 344kW Solar PV System Designed for the Next 30 Years.

Your Eco successfully completed a substantial upgrade to the solar PV system at the National Trust's Heelis Head Office in Swindon, transforming its system from 60kW to 344kW designed for the next 30 years. 765 bi-facial 450 Wp all-black DMEGC Solar panels. Utilising SolarEdge technology, DMEGC solar PVs, and ValkPicthed standing seam with a behind-the-meter self-consumption approach, the redesigned system increased capacity from 60kWp to 344kW, demonstrating effective solar technology integration in an existing building to support sustainable energy consumption.Your Eco successfully completed a significant upgrade of the solar PV system at the National Trust's Heelis Head Office in Swindon. The system was expanded from 60kW to 344kW and is designed to last for the next 30 years.

The upgraded system features rooftop and ground-mounted solar arrays, designed to maximise energy generation to meet onsite electricity demands of the head office, whilst lowering costs to as low as 3-5 pence per kWh. As John Millen quotes, “by partnering with Your Eco, and recycling old panels through PVCycle, The National Trust demonstrates leadership in renewable energy and conservation”. 

Project Highlights:

☀️ Solar Panels: 765 bi-facial 450 Wp all-black DMEGC Solar panels with a +30-year performance warranty.

☀️ Inverters: 3 x 90 kW SolarEdge Technologies inverters with enhanced 20-year warranties.

☀️ Optimisers: 385 x S1000 SolarEdge Technologies optimisers with 25-year warranties.

☀️ Warranty: 2-year #AdvantEdge performance warranty.

Forecasted Benefits:

⚖️ 38% annualised ROI

📆 4-year payback on capital

💰 3.3 pence per kWh cost of electricity produced from solar

⚡️ 348 MWh of clean energy ‘grown’ organically onsite

💨 1,680,347 kgs of Co2 emissions saved

🌱 3,087 annual equivalent trees planted

By generating renewable energy onsite, Heelis is setting a strong example for how heritage organisations, businesses, and large estates can rethink and deploy solar power in ways that balance sustainability, operational efficiency, and the preservation of aesthetics. Kieran Cole from National Trust reflects how the project exemplifies the seamless integration of renewable technologies into both the built and natural environment, delivering not just sustainability but also aesthetic harmony,”

Your Eco CEO Nick Spicer stated that this project demonstrates the environmental and financial benefits of onsite self-consumption strategies for businesses and estates like National Trust Heelis, further adding how “renewable systems, such as carefully designed solar PV setups, can be scaled to fit estates, carports, and other built environments”.

Check out our video case study on our youtube channel: https://www.youtube.com/watch?v=UQ7gqfUAEKA