Standby Generators: frequently asked questions
These answers are general. For your situation, check the official sources listed below or ask a professional.
What size generator do I need?
It depends on what you want to power: essentials only, or the whole home including air conditioning. An installer calculates the load.
Do I need a permit?
In most places, yes: an electrical permit, and often a gas or zoning permit too.
Can I plug a portable generator into an outlet?
No. Backfeeding through an outlet is dangerous for you and for utility workers. Use a transfer switch or an interlock installed by an electrician.