Power surges and power spikes can occur at anytime. Unfortunately they can damage the electronics inside the control unit of your backup system. Protect your backup system with a surge protector which is a device that suppresses power surges. A surge protector can be purchased at any electronics or hardware store. They are rated in joules. At least 1500 joules is recommended for any of our backup systems. We do not suggest plugging the primary pump into a surge protector.