The answer to 'how to test panel upgrade' is to perform a comprehensive inspection of the electrical panel to ensure it is functioning properly and can handle the increased electrical load. This includes checking for any signs of damage, corrosion, or overheating, as well as testing the circuit breakers and ensuring the panel has adequate capacity for your home's needs.
Start by turning off the main breaker and removing the panel cover. Visually inspect the interior for any signs of damage, such as scorching, discoloration, or loose connections. Use a multimeter to test the voltage at the main lugs and each individual circuit breaker. Ensure the panel is properly grounded and that all connections are tight. If you notice any issues, it's best to call a licensed electrician to further evaluate and make any necessary repairs.