We offer a number of surge arrestor products for both your main panel and individual circuits, many of which can be retrofitted very easily. However, these products only offer additional levels of protection as nothing can guarantee against the power of Mother Nature. Additionally, depending on where the surge begins in your house, a main panel arrestor may not protect certain circuits as the surge will only be stopped when it hits the arrestor. We recommend protecting valuable equipment such as computers and audio/video devices with additional localized surge protection devices.