The generator must be started when you need it. It is not automatic. Look for a panel something like this -
You may find it in the kitchen area or even inside a small cabinet. You press it until it starts but if it doesn't start within about 10 seconds, release the button and let the starter cool for a minute, then try again. It may take several tries. If it cranks too slowly, then start the main chassis engine to provide maximum voltage to the battery. When you are finished using the generator, press and hold the switch in the Stop position until it fully stops.
