Alexander Dennis has upped the warrantable energy throughput for the traction battery packs fitted to the Enviro100EV and Enviro400EV next-generation buses in a move that it says draws “on the versatility of NMC cell chemistry.”
When either model is equipped with 354kWh of battery capacity, the warranted energy throughput – which includes regeneration – can be 1.2GWh over eight years. For the Enviro400EV with 472kWh of batteries, that figure is 1.6GWh, while the Enviro100EV in 236kWh form has a warrantable throughput of 800,000kWh.
Upon debut of both models in November 2023, Alexander Dennis said that the 472kWh battery configuration then had an overall energy throughput of 1.4GWh before replacement would be required at 70% of original capacity. At that time, it believed that 1.4GWh was 40% higher than any competitor vehicle.
Group Sales and Business Development Director Ben Werth says that energy throughput is “critical” to calculating the longevity of batteries. Upping of the eight-year warrantable figures has come thanks to the use of multi-physics simulation modelling.
Adds Mr Werth: “The option to warrant higher intensity battery use is great news for operators planning to deploy electric buses on heavy-duty or high-mileage services.
“We are delighted to be driving value through longevity by giving our customers peace of mind that our next-generation electric buses will offer longer-term operational profitability.”
10- and 12-year battery warranty options are also available, Alexander Dennis says, with warranty lengths and warrantable throughputs tailored to suit the customer’s needs.
Both buses use batteries supplied by Impact Clean Power Technologies. Alexander Dennis Group Engineering Director Chris Gall previously said that NMC chemistry was chosen because of a requirement for slim battery packs to fit within the chassis.
