Each vehicle features the XL3 Electric Hybrid System, which adds an electric motor-generator and lithium-ion battery to the standard petrol engine. Installation takes six hours and is claimed to cut fuel consumption by 20%.

‘More than 1,100 young children take part in Square One’s early education and nutrition programs. In many cases, the vans are the only means of transportation to the critical services the agency provides,’ said Kimberley A. Lee, vice president of advancement at Square One.

The conversions were funded by the Massachusetts Department of Energy Resources as part of the state’s Clean Cities initiative, which is aiming to promote the adoption of alternative fuel vehicles and develop infrastructure to support them.

Tod Hynes, president and founder of XL Hybrids, said: ‘The converted hybrid electric vans will allow Square One to immediately save on fuel, reduce vehicle maintenance, and support its green initiatives.

‘We’re excited that the Mass. Department of Energy Resources came to us so that we can provide sustainable transportation for Square One's mission to meet the vital needs of the most vulnerable families and children in the community.’