The answer to 'electrical panel replacement schedule' is that most electrical panels should be replaced every 25-40 years, or sooner if they show signs of wear or damage. Older panels may not have the capacity to handle modern electrical needs, and can become fire hazards as they age. It's important to have a qualified electrician inspect your panel regularly and recommend replacement if needed.
Factors that can impact the lifespan of an electrical panel include the quality of the original installation, the age and condition of the panel, the electrical load on the panel, and any damage or corrosion over time. Upgrading an outdated or overloaded panel can improve the safety and efficiency of your home's electrical system.