Unlike a portable generator you wheel out and manually connect, a standby generator is permanently installed. It monitors utility power 24 hours a day. The moment Oncor power fails, it starts and transfers the home to generator power within 20 seconds through an automatic transfer switch. When utility power is restored, it transfers back and shuts off.
It runs on your existing natural gas line — no refueling, no storage cans, no running out of fuel after day two of a winter storm. In Arlington TX where outages can last hours to days, this matters.