Solar PV for Turner Group HQ, Glasgow
The Turner Group head office site in Govan, Glasgow consists of a number of facilities including the main office building, engine workshops and the Glasgow depot of Turner Hire Drive and the electrical demand is considerable.
Electricity- The actual half hourly electrical usage was tracked over a year and run through PV Sol software to compare potential solar generation and capital outlay against onsite demand. This enabled the calculation of the optimum generator size to meet the needs of the site. Solutions considered:
• Electrical generation via Solar PV and CHP
• Battery Storage
Gas - In absence of half hourly data the site was assessed to apportion the use. This was done by looking at ratings of heat generators (boilers and fan blowers) and time clocks settings. Solutions considered:
• Heat generation from CHP
There is not a sufficiently constant heat demand at the site to make gas CHP a feasible option. There is a good business case for a 50kW solar PV array on one of the workshop roofs which faces due south. Battery storage was not deemed viable given that all the energy generated would be used directly on site.
Ecoliving received the customer’s agreement in principle on the proposed solar PV installation and lodged a G59 grid connection application with the DNO. Once approved, a risk assessment was carried out and RAMS produced.
It was decided that the scaffolding should be erected on 3 sides of the building with full edge protection. The decision was also taken to fit rooflight fall arrest screens before commencing the solar PV installation.
Management plans were drawn up for Health & Safety, construction, lifting and traffic management. The Ecoliving project manager worked closely with on-site compliance and QHSE staff throughout.
Overall System Design
We analysed half hourly energy data for the site and used PVSOL simulations to size the PV system precisely. Our aim was to maximise on-site use of the PV energy, offsetting as much imported electricity as possible.
Through simulation we were able to size the system for 100% usage with zero export, offering maximum returns and carbon savings. System losses were kept to a minimum with close to zero shade loss, accurate sizing and precise specification of all cabling, protection devices and electrical connections.
JA solar 270W polycrystalline modules offer a good balance between performance and cost from a tier one manufacturer. High efficiency, linear 25 year power performance warranty and 12 year product warranty make the module an attractive option for commercial systems.
Roof mounting Kit
Renusol are a leading manufacturer in one of the world’s largest solar markets in Germany. The Metasole portrait fixing system offers competitive pricing and ease of installation. The Mitchell building roof has a trapezoidal sheet metal covering meaning we could fasten directly to the sheet with no need to secure into the roof substructure. This meant installation time could be kept to a minimum as well as a much lower risk of water ingress. The fixing system is made from aluminium and stainless steel, offering excellent corrosion resistance over the system lifetime with a strong 10 year warranty.
Fronius are arguably the world’s strongest inverter manufacturer and have been producing solar PV inverters since 1992. As the inverter is the heart of the system we decided on a premium offering with high reliability, performance and a seven year warranty. We included the option of monitoring to allow the client to log in remotely to check system health and production. The portal also provides email alert options if a fault occurs or even if production falls below expected tolerances.
Have a look at the video footage of the completed solar PV installation shot from a drone by Callum Walker.
If your commercial or industrial site is using over £15,000 a year of electricity then you could benefit from a similar sized solar PV array with good payback and excellent ROI.
Get in touch and send us your half hourly data for a no obligation cost benefit analysis.