Keywords: opportunity charging opportunity charging opportunitycharging volvo 7900 siemens Volvo 7900 Electric Concept Bus - destined for Gothenburg Sweden, on demonstration at the Milan Italy 2015 UITP exhibition. Also seen is a Siemens overhead 'opportunity charging' unit. In 2017 this charging system is expected to start being used in Edinburgh. Volvo 7900 Electric Concept Bus - destined for Gothenburg Sweden, on demonstration at the Milan Italy 2015 UITP exhibition. Also seen is a Siemens overhead 'opportunity charging' unit. In 2017 this charging system is expected to start being used in Edinburgh. |