“Solar South West have transformed our school’s attitude to energy use and production. The installation of 240 PV modules was efficient and worked around the needs of a running school. They continue to offer excellent support and advice and we would recommend them to any school or educational institution.” – Paul Walton, Deputy Headmaster, Northern Parade Junior School.
Not too long ago, Solar South West were contracted to install 78kWp of PV on a junior school in Hampshire.
The site’s management wanted to maximise its generation potential and take advantage of their large roof space, however, due to a grid limit issue, the DNO wouldn’t allow export over 20kWp.
To achieve the site’s generation requirements whilst protecting the grid, SSW limited the systems export potential to the required 20kWp through use of export limitation device: the SMA cluster controller.
The SMA cluster controller is a device which, by limiting export, protects the grid, and allows us and the school to monitor their consumption patterns. The export limit is displayed by the red dotted horizontal line in the graph above.
When installing the SMA cluster controller during this project, we also helped educate the DNO about its functionality, being one of the first companies to do so in the UK.
Limiting the site’s export capability allowed the school to install a larger PV system, meeting proposed generation requirements, whilst keeping in line with the local DNO restrictions.