The answer to 'how long does generator installation last' is that a typical generator installation for a home can take 1-3 days to complete, depending on the complexity of the project. This includes tasks like preparing the installation site, running new electrical wiring, connecting the generator to the home's electrical system, and testing the system to ensure proper operation.
The actual time required will depend on factors like the size and power output of the generator, whether new electrical panels or circuits need to be installed, and how accessible the installation location is. Professional electricians will also need to obtain any necessary permits and schedule city/county inspections, which can add a day or two to the overall timeline.