Denis Mahony
Commercial Solar for High-Demand Retail Operations
As energy costs continued to rise across Ireland, Denis Mahony Toyota sought a practical way to reduce operational electricity costs while strengthening the sustainability performance of its dealership operations in Dublin. With significant daytime electricity demand across showroom, workshop, servicing, and operational facilities, the business was well positioned to benefit from on-site renewable energy generation. The objective was to implement a solar solution capable of delivering immediate commercial savings while supporting longer-term environmental goals. Shannon Energy was engaged to design and deliver a tailored rooftop solar PV system across the Denis Mahony Toyota M50 and Kilbarrack sites.
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The Challenge
Automotive dealership and servicing facilities operate with a consistent daytime energy profile driven by lighting, workshop equipment, servicing operations, office functions, and customer-facing environments.
For Denis Mahony Toyota, the challenge was to maximise the use of available roof space across multiple building types while ensuring minimal disruption to daily operations during installation.
The project also needed to deliver a strong financial return within a commercially realistic timeframe, while aligning with broader sustainability objectives and taking advantage of available government support mechanisms.
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Our Approach
Shannon Energy developed a tailored rooftop solar solution designed specifically around the operational profile of the two Dublin sites.
The installation combined both flat and trapezoidal roof systems, requiring careful engineering and mounting design to ensure optimal performance across varying roof structures. Using a Renusol mounting system alongside JA Solar 500W PV panels and Solax inverter technology, the system was designed to maximise generation while integrating seamlessly into the existing buildings.
The project was delivered with support from the SEAI grant scheme, helping to improve the overall project economics and accelerate return on investment.
Delivery
Tailored System Design
Shannon Energy designed a rooftop solar solution specifically around the operational profile of the M50 and Kilbarrack dealership sites, optimising generation across both flat and trapezoidal roof structures.
Integrated Project Delivery
The installation combined JA Solar 500W PV panels, Solax inverter technology, and Renusol mounting systems to ensure efficient integration into the existing buildings while minimising disruption to daily dealership operations.
Grant & Commercial Support
The project was delivered in conjunction with the SEAI grant scheme, improving overall project economics and helping accelerate return on investment for the client.
Outcome
The completed installation provided Denis Mahony Toyota with a commercially viable renewable energy solution capable of reducing operational electricity costs while supporting broader sustainability objectives. By aligning system design to the client’s daytime energy demand, Shannon Energy delivered a practical long-term energy asset integrated directly into dealership operations.
60% Energy Offset
Approximately 60% of the sites’ overall electricity demand is now supported through on-site solar generation.
122kWp Installed
Tailored rooftop solar PV system delivered across the M50 and Kilbarrack dealership facilities.
3-Year Payback
Strong commercial return achieved through efficient system design and SEAI-supported project economics.
16+ Tonnes CO₂ Avoided
Measured carbon reduction achieved through reduced reliance on grid electricity.
Start with the Energy Strategy & Solar Readiness Study
A structured assessment that clarifies feasibility, project risks, and the most practical pathway to on-site solar.
Start the Conversation