Alloa Waste Water Treatment Works

Project Outline

R&A Group were appointed to design, supply, install, test, commission and hand over a 950kW Solar PV system at Alloa Waste Water Treatment Works for a major water utility provider. This large-scale renewable energy installation supports Scotland’s Net Zero ambitions by reducing carbon emissions and increasing onsite renewable generation.

The project included grid application, full design and planning, ground investigation works, civil engineering, MCC modifications and remote monitoring system integration.

A pile-driven ground mounting system was installed to support 1,728 PV modules, paired with eight inverters supplied by Fronius. An export limitation scheme was incorporated to ensure compliance with network constraints while optimising renewable generation.

Main installation works were completed between March and August 2024, followed by energisation between February and March 2025. All works were delivered in coordination with the client’s operational team to maintain site safety and minimise disruption.

Project Outcome

The 950kW Solar PV system was successfully installed, tested and commissioned, and is now performing at expected generation levels. The system supplies over 29% of the site’s annual electricity consumption, significantly reducing reliance on grid energy.

The installation is expected to avoid over 141,000 kg of CO₂ emissions each year, contributing directly to Scotland’s Net Zero targets while delivering long-term operational and environmental benefits.

This project demonstrates R&A Group’s capability in delivering complex, utility-scale solar PV schemes with strong technical performance and fully integrated monitoring, safety and control systems.