The answer to 'how long does surge protection last' is that most whole-home surge protectors have a lifespan of 10-15 years. These devices are designed to protect your home's electrical system from power surges and spikes, but they can wear out over time. As the internal components degrade, the surge protector's ability to effectively divert excess voltage decreases.
It's important to regularly inspect your surge protector and replace it if it appears damaged or is no longer providing adequate protection. You can also test the surge protector periodically using a specialized tester to ensure it is still functioning properly. Replacing a whole-home surge protector every 10-15 years is generally recommended to maintain optimal protection for your home.