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Generator size requirements vary wildly among properties, but typical generator sizes are listed below based on home square footage:

• 1,000 sq ft: 6–9 kW

• 1,500 sq ft: 7–10 kW

• 2,000 sq ft: 10–14kW

• 2,500 sq ft: 12–16kW

• 3,000 sq ft: 16–20kW+

Unfortunately, home square footage isn’t always a good indicator of generator size requirements. Instead, you should call in a professional to discuss which items in your home you’d like to run via your generator. They can calculate peak and average consumption for those items and then size your generator appropriately for optimal performance.

Costs depend on the property size, audit complexity, and whether additional testing (e.g., blower door) is included.

DIY is possible with basic tools. Professional audits provide comprehensive assessments and tailored recommendations.

Services by electricians can quickly get expensive, but there are a few ways you can save money in the process:

• Bundle multiple jobs done at the same time to save on trip fees or flat fees for individual projects.

• Get at least three quotes for service to find the best deal.

• Buy fixtures, switches, outlets, and other materials beforehand to avoid product markup.

• If you feel comfortable with it, have an apprentice or journeyman complete the work under the supervision of a master electrician. These electricians in training tend to charge less per project.