Tracking project performance

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Bath and West Community Energy calculate forecasts for the output of their solar PV projects and track the actual output produced. These figures are calculated and communicated quarterly and posted on their website in the form of a simple graph. The graph shows the performance of all their operating solar PV projects since commissioning, comparing actual and forecast output. The line shows the percentage to which all the projects have performed above or below forecast when considered cumulatively since the date they were commissioned. This has enabled them to identify and communicate that overall their projects have performed 5% above forecast on average since commissioning. This was as high as over 10% above forecast in March 2012. They also have separate webpages showing the output from each of their individual projects, with graphs and explanations. This approach enables them to have evidence of the benefits of their projects which can be communicated to the community to engage both new and existing supporters.