https://www.planetminecraft.com/project/1-5-1-scale-kamaz-6561-hercules-heavy-mining-truck/


The KAMAZ-6561 dump truck, named Hercules, is made according to the “serial hybrid” scheme, i.e. it is an autonomous electric vehicle that does not require recharging from an external network. The internal combustion engine drives an electric generator, which provides energy for the traction motor and charges the battery. The serial hybrid runs in places on pure electricity with a charged battery and, thus, is very close to an electric vehicle. In case of the KAMAZ-Hercules truck, energy recovery will occur when descending into the quarry, and when climbing up with a load, the accumulated energy in the batteries helps the truck to climb uphill. This solution allows you to reduce the amount of fuel consumed by 15 % in comparison with the diesel analogue.

taken from,
https://kamazexport.com/kamaz-presented-new-kamaz-6561-dump-truck/