A power surge can happen in less than a second, but it can damage appliances and electronics throughout your home.
Televisions, computers, refrigerators, air conditioners, EV chargers, solar equipment, and battery systems all rely on sensitive electrical components. Knowing what causes power surges and how to prevent damage can help protect your home and avoid costly repairs.
What Is a Power Surge?
A power surge is a sudden increase in electrical voltage.
Your appliances are designed to receive a steady amount of electricity. When too much electricity enters the system at once, it can damage wiring and electronic parts.
A large surge may destroy a device immediately. Smaller surges can cause damage over time and shorten the life of your appliances.
What Causes Power Surges?
Power surges can come from outside or inside your home.
Power Outages
A surge may happen when electricity comes back on after an outage.
Several appliances may restart at the same time, creating a sudden change in electrical demand.
Lightning
Lightning can send a large amount of electricity through nearby power lines.
It does not always need to strike your home directly. A nearby lightning strike can still affect your electrical system.
Utility Equipment
Power grid problems, damaged transformers, downed power lines, and utility switching can cause changes in voltage.
These events may send a surge into your home through the electrical service.
Large Appliances
Appliances with motors or compressors can create small surges when they turn on or off.
Examples include:
- Air conditioners
- Refrigerators
- Washing machines
- Dryers
- Freezers
- Pumps
- Power tools
These smaller surges may not cause immediate damage, but repeated surges can slowly wear down electronics.
Old or Damaged Wiring
Loose connections, damaged wires, poor grounding, and overloaded circuits can also create electrical problems.
Older Bay Area homes may have outdated wiring or several generations of electrical work. Flickering lights, warm outlets, buzzing sounds, and frequently tripped breakers may be signs that the system needs to be inspected.
What Can a Power Surge Damage?
Many modern appliances contain computer boards and sensitive electronics.
A power surge may damage:
- Televisions
- Computers
- Internet equipment
- Refrigerators
- Washing machines and dryers
- Heating and air conditioning systems
- Garage door openers
- Security systems
- Smart home devices
- EV chargers
- Solar inverters
- Home battery systems
Sometimes the damage is immediate. In other cases, the appliance may continue working but fail earlier than expected.
Is a Power Strip the Same as a Surge Protector?
No.
A standard power strip only gives you more outlets. It may not provide surge protection.
A surge protector is designed to reduce excess voltage before it reaches the connected equipment. It should be clearly labeled as a surge protector.
Surge protectors can also wear out. Many include a light that shows whether the protection is still active.
Plug-in surge protectors are useful for televisions, computers, routers, and home office equipment. However, they only protect the devices plugged into them.
What Is Whole-Home Surge Protection?
A whole-home surge protector is installed at or near your main electrical panel. It helps reduce excess voltage before it reaches the outlets, appliances, and equipment throughout your home.
Whole-home protection can help protect items that cannot be plugged into a standard surge strip, including:
- Air conditioning systems
- Refrigerators
- Ovens
- Lighting
- Garage door openers
- Solar equipment
- Battery systems
- EV chargers
For better protection, homeowners can use a whole-home surge protector along with plug-in surge protectors for sensitive electronics.
Benefits of Whole-Home Surge Protection
Protects More Equipment
A whole-home system helps protect appliances and devices throughout the house, not just the items connected to one power strip.
Helps Protect Expensive Upgrades
Solar systems, battery storage, EV chargers, smart panels, and modern appliances contain sensitive electronic parts. Surge protection can help protect these investments.
Works Automatically
Once installed, a whole-home surge protector works without daily attention.
Adds Protection During Outages
Bay Area homes can experience outages caused by storms, utility equipment, vehicle accidents, and planned safety shutoffs.
A surge protector can provide added protection when electricity is interrupted or restored.
How to Protect Your Home
There are several ways to reduce the risk of surge damage.
Install Whole-Home Surge Protection
A licensed electrician can install a surge protector that works with your electrical panel.
Use Plug-In Surge Protectors
Use quality surge protectors for televisions, computers, internet equipment, and other sensitive devices.
Check Your Electrical Panel
An outdated or damaged electrical panel may need repairs or replacement.
Inspect Your Wiring
Loose connections, damaged outlets, and poor grounding should be corrected by a licensed electrician.
Unplug Electronics During Severe Storms
When practical, unplug sensitive electronics during lightning storms.
Does Your Home Need Surge Protection?
Almost any home can benefit from surge protection.
It may be especially useful if your home has:
- Expensive appliances
- Solar panels
- Battery storage
- An EV charger
- Home office equipment
- Smart home technology
- Older wiring or an outdated electrical panel
A licensed electrician can inspect your electrical system and recommend the right protection for your home.
Protect Your Bay Area Home
A power surge may only last a moment, but the damage can be expensive.
Infinium Solar, Roofing, and Electric provides electrical inspections, panel upgrades, EV charger installations, solar and battery services, and whole-home surge protection for Bay Area homeowners.
Contact Infinium Solar, Roofing, and Electric to schedule an electrical consultation and learn how to protect your home from power surges.
