The answer to 'how much is surge protection upgrade' is that the cost can vary widely depending on several factors. Typical surge protection upgrade costs for a home can range from $100 to $500 or more, depending on the size and complexity of the electrical system, the type of surge protector installed, and whether any additional electrical work is required.
Factors that influence the cost include the size and age of the home, the electrical panel capacity, the number of circuits that need protection, and whether the surge protector is installed at the main electrical panel or at individual outlets. Professional installation is generally recommended to ensure the surge protector is properly integrated with the home's electrical system.