When this work makes sense
- Planning essential loads during outages
- Adding an approved generator inlet arrangement
- Replacing an unsafe improvised connection
The electrical work
Install a panel-compatible interlock, generator breaker and required labeling.
Panel must accept a listed compatible arrangement. Inlet and branch wiring priced separately.
Estimated pricing
$405–$810 per interlock add-on
Project ranges include labor and standard installation materials unless a listing says otherwise. Hourly rates are labor only, and equipment you supply (such as chargers, fixtures or fans) is not included. Permit fees and sales tax are additional. Estimates are free, including on-site visits.
Electrical work may require openings in walls or ceilings. Drywall patching, texture, and painting are not included and must be arranged with others.
What affects the scope and cost
- Listed interlock compatibility
- Generator and inlet rating
- Loads intended for backup
A common question
Does the interlock range include a generator or inlet?
No. The interlock add-on range excludes inlet and branch wiring. True offers portable-generator interlock work, not permanent standby systems, automatic standby equipment or gas work.
Not sure what you need?
Send a photo. Ask a certified electrician.
Not sure what you need? Send a photo and tell True what’s going on or what you’d like to change. Get help understanding your options and the next step.
Tell True about your project
What happens next
Tell us what you’re working on. True will review your request and respond by your preferred contact method. Together, we’ll determine whether the next step is advice based on your photos, a visit, or an estimate. Estimates are free, including on-site visits.