Onboard chargers must cope with demanding environments
Onboard chargers are often much smaller than stationary chargers, and the available power output will often be lower. Since the charger will be transported "on board", it needs to be compact and perfectly adapted to the vehicle. Onboard chargers have been used in electric cars for a long time, but as the number of electric forklifts, commercial vehicles, wheel loaders, AGVs, cleaning machines, etc. grows, so does the need for reliable onboard chargers that can withstand harsh operating conditions including vibrations, shocks, dirt, dust and varying temperatures.
An onboard charger needs to handle everything from a cold icy morning outdoors at -30˚C to a hot summer day with a machine working at full power at +55˚ C.