Gellideg Foundation Group
Integrated solar, battery storage and air source heat pumps for the first community-owned Passivhaus in Wales, funded via Ynni Cymru.
Rising energy costs were putting pressure on frontline community services
The Gellideg Foundation Group's Wellbeing Centre supports more than 600 people every week through a wide range of community services. As a self-funded charity, increasing energy costs were placing growing pressure on operational budgets, diverting resources away from the services and support programmes the organisation exists to deliver. The challenge was to reduce long-term energy expenditure while improving the building's overall energy performance and resilience.
An integrated energy system designed around how the building operates
Rather than deploying a single technology, Nuvolt designed a complete low-carbon energy solution tailored to the centre's operational requirements. The project combined a 32.2 kWp solar PV system, 37.3 kWh battery storage and two 30 kW air source heat pumps, creating an integrated energy ecosystem capable of generating, storing and utilising energy more efficiently throughout the day. The system was designed around actual building usage patterns to maximise performance and long-term value.
- First community-owned Passivhaus in Wales
- Combined solar, battery storage and air source heat pumps on one site
- Funded through the Ynni Cymru scheme — no upfront capital from the charity
- Frees up funds to support more of the 600+ people the charity helps weekly
Lower energy costs and more funding directed towards community impact
The completed system now enables the centre to generate, store and utilise its own energy on-site, reducing dependence on imported electricity and fossil-fuel-based heating. The project is projected to reduce annual energy costs by approximately £18,000, helping redirect valuable resources back into community services while providing greater certainty over future operating costs.
“This system is not only good for the planet, it's an investment in the future sustainability of our organisation. By reducing our energy costs, we can focus more of our resources on supporting the community.”
Selected projects
Marston's PLC
Sustainability initiative — headquarters and Phase 1 solar installation across Marston's hospitality estate, delivered with HT Power PPA support.
- System size
- 114.38 kWp
- CO₂ saved
- 17.44 T
- Payback
- 4 years
The Vale Resort
Solar PV plus EV charging delivered live across a working luxury resort and golf club.
- System size
- 168.81 kWp
- Year-1 savings
- £43,049.60
- CO₂ saved
- 28.8 T
Four Elms Group
Solar PV across a UK network of automotive repair and accident management centres.
- System size
- 117.45 kWp
- Year-1 savings
- £33,632
- Payback
- 3 years
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