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The article “Go-Ahead Singapore rolls out 6-month trial of public buses with solar panels”, Yufeng. K (2021) explains the objective of implementation, test period and plan of action.

The six-month trial began in march with the installation of versatile solar panels on the “roof of two Man A22 Euro 6 diesel-powered buses”. The panels produce energy that charges the battery on the buses which is generally used for ignition and supplying power. Thus, lowering the engine load which previously depended solely on the vehicle’s alternator. The application will aid bus operator Go-Ahead Singapore, “save 1400 litres of diesel and a reduction of 3.7 tonnes of carbon emissions per bus per year” deriving on figures from a corresponding trial in the United Kingdom.

The trial period in Singapore is to assess the buses performance, with effectiveness and toughness of the panels. If it exceeds expectation, more diesel and possibly electric buses 

could be implemented which makes them to be “green and efficient” with the cooperation of LTA who owns the buses.

Some of the buses have been approved and will be monitored closely to form up with a schedule for inspection during the trial. Go-Ahead Singapore predicts the savings incurred in four years  will resolve their trial expenditure.