The vehicles will enter service in 2018 and will utilise 'opportunity charging' via the common interface OppCharge, which enables charging stations to also be used by electric buses from other vehicle manufacturers.
Opportunity charging uses a specialist overhead mast, which connects to the bus via a pantograph. Charging is fully automated and takes between three and six minutes to complete.
The project has been partly funded by the UK Government's Low Emission Bus Scheme.