The answer to 'how long does panel upgrade last' is that a properly installed electrical panel upgrade can last 25-40 years or more with proper maintenance. The lifespan of an electrical panel depends on factors like the quality of the installation, the electrical load on the panel, and how well it is maintained over time.
Electrical panels are designed to safely distribute power throughout a home and protect against electrical fires and shocks. When a panel is upgraded to a larger capacity with modern circuit breakers, it can handle increased electrical demands from new appliances, electronics, and home additions. With regular maintenance and inspections by a licensed electrician, a quality panel upgrade can provide reliable power for decades.