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New Zealand Post: Cutting the cost of charging electric vehicles by 22 per cent

New Zealand’s leading postal delivery company, New Zealand Post, needed to find new ways to manage declining mail volumes. They’d ordered 500 electric vehicles to help them deliver mail and parcels more efficiently. They asked us to help them find the best options for charging their new vehicles.

We used our extensive experience of the available technology and rapidly changing nature of electricity markets to identify eight options. We analysed each of them to see how effective they would be in cutting economic and environmental costs. The options included making sure New Zealand Post was using the best electricity tariff and they were charging the vehicles at the right times.

We also looked at the possibility of using smart technology to apply automatic controls that can suspend charging at times when electricity prices are high. Looking to the future, it may be possible to use the vehicle fleet as a large distributed grid connected battery. This could then operate in the electricity market: helping suppliers to manage demand, and receiving a premium rate for discharging electricity back to the grid.

As a result, we identified annual savings of 22 per cent over New Zealand Post’s existing charging methods. They’re now validating the options site by site and will implement them as they deploy the electric vehicles across the business.

"The great benefit of working with PA was their in-depth knowledge of technology and the electricity market and how they were changing.  That’s given us a great range of practical options that we know can reduce the costs of running our electric fleet."

Sam Bridgman, Corporate Sustainability Specialist,
New Zealand Post

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