The answer to 'how long does electrical panel last' is that a properly maintained electrical panel can last 25-40 years on average. Electrical panels are designed to withstand normal wear and tear, but their lifespan can vary depending on factors like the quality of the panel, the home's electrical usage, and how well it has been maintained over time.
Older electrical panels made with less durable materials may need to be replaced sooner, often within 20-25 years. Newer, higher-quality panels can last 30-40 years with proper care. Regular professional inspections and prompt repairs to any issues can help extend the lifespan of an electrical panel.