Generator FAQs
Find clear, practical answers to the most common generator sizing questions—organized by topic so you can jump straight to what matters for your home.
These FAQs focus on residential optional standby systems and portable backup generators. For anything critical or commercial, always work with a licensed electrician and follow your local codes.
-
General generator sizing
Big-picture questions like “What size generator do I need?” and “How do I calculate my running and starting load?”
-
AC & HVAC generator sizing
How to run central air, heat pumps, and multiple AC units on a generator without tripping it offline.
-
Portable generator FAQs
Essentials-only backup, inverter vs. conventional, and what a 7,500–15,000 W portable can realistically power.
-
Well & sump pump sizing
Sizing for well pumps, sump pumps, and other high-starting-current loads that keep water moving and basements dry.
-
Technical & electrical questions
NEC-style load calculations, power factor, continuous ratings, and how electricians think about kW for a house.
-
Costs, runtime & maintenance
Fuel use, daily operating cost, permits, and what it takes to keep a standby generator running for the long haul.
Note: These FAQs are for residential optional standby systems under NEC Article 702 and are not intended for emergency systems, legally required standby, or critical operations power. Always confirm final sizing and installation details with a licensed electrician in your jurisdiction.