Most homeowners think about lightning when they think about surge protection. Lightning is real and damaging. But it is not where most surge damage comes from.
According to electrical safety researchers, roughly 80 percent of power surge damage in homes comes from internal surges - voltage spikes generated inside the home itself by large appliances cycling on and off. Every time your HVAC compressor starts, your refrigerator cycles, your pool pump kicks on, or your EV charger begins a charging session, it creates a small voltage spike on the home's electrical system.
These internal surges are small compared to a lightning strike, but they happen dozens of times a day. Over years, they degrade the internal components of electronics, smart appliances, and control boards. The damage is cumulative and often invisible until a device fails earlier than expected.
Comes from internal surges inside the home - HVAC compressors, refrigerators, pool pumps, and EV chargers cycling on and off. Not lightning. A panel-mounted whole house surge protector captures these internal spikes before they reach other devices.
External surges enter through the utility lines from Oncor. The most common external surge events in Arlington TX:
⚡Direct lightning strikes on or near the home
⚡Lightning striking the Oncor distribution line serving your neighborhood - the surge travels down the line into your meter
⚡Oncor switching surges - when utility equipment switches on or off, it creates a voltage spike on the line
⚡Transformer faults and power restoration after an outage - the moment power returns after a grid fault often carries a surge