At extremely low air temperatures, electric bus batteries can lose up to 20–30% of their capacity. Plus, another 15 to 20% of the reserve capacity is spent on heating the cabin. Therefore, manufacturers use special battery heating technology, as well as an intelligent energy consumption system. And this is an example of the Yutong company, which decided to conduct a series of sea trials of its electric buses in the midst of winter frosts – the Extreme Cold Challenge. And the first city was the capital of Kazakhstan – Astana.
The articulated low-floor model Yutong E18PRO, designed for 120 passengers, spent the whole day on the route at an outside temperature of -25C. The car served 350 stops and transported over 1,500 people. As a result, she managed to travel 374 km, discharging up to 5% of the capacity of the 563 kWh lithium iron phosphate battery. A very good result in such weather conditions.
It should be noted that today there are 120 city electric buses operating in Astana. After four years of operation, Astana First Bus Electric purchased the next batch of machines – Yutong E18PRO. This was their first winter, and therefore it was decided to test what the new model was capable of.