Kubota GL7000-CAN Operator's Manual page 4

To prevent electrical shock the following instruction must be followed.
Before the generator can be connected to a building's electrical system, a licensed
electrician must install an isolation (transfer) switch in the building's main fuse box.
The switch is the connection point for generator power and allows selection of
generator or main line power to the building.
This will prevent the generator from charging the main power line (backfeeding)
when the main power supply has failed or has been turned off for line repair.
Backfeeding can electrocute or injure line maintenance personnel. Also, generator
and building electrical system damage can occur when normal operating power
returns if unit is used without an isolation switch.
Engine exhaust, some of its constituents,
certain vehicle components and fluids,
contain or emit chemicals known to the
State of California to cause cancer and birth
defects or other reproductive harm.
WARNING
California Proposition 65
WARNING