Sigineer Power produces a wide range of inverter chargers for utility work trucks.
These models including some UL listed inverter chargers from 1KW to 3KW.
UL458-listed inverters meet strict vibration, environment, and thermal requirements .
The UL458 inverter’s circuitry includes a neutral-to-ground switching relays which bond N and G in when the inverter in off-grid mode, and unbond it if it is connected to utility shore power.
Find here for more details about neutral to ground bonding.