How to Prepare Your Home’s Electrical System for Summer Storms

Summer storm season brings more than rain and heat. Thunderstorms, high winds, and lightning can do real damage to your home’s electrical systems, and much of it is not visible until something stops working. A fried control board in your HVAC unit, a tripped panel that will not reset, or a power surge that takes out every appliance on the circuit: these are not rare worst-case scenarios. They are common, costly, and largely preventable.

In 2024 alone, lightning caused more than 55,000 homeowners insurance claims across the U.S., with an average cost of $18,641 per claim. The good news is that a few hours of preparation before storm season, and the right equipment in place, can prevent the bulk of that damage.

Here is what every homeowner should know before the first big storm of summer arrives.

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What Summer Storms Actually Do to Your Electrical System

Most people picture lightning striking their home directly. In reality, that is the least common scenario. The bigger threat is indirect: a strike hits a nearby utility line or transformer, sending a voltage surge through your home’s wiring in a fraction of a second. That surge travels silently through every connected circuit, reaching your HVAC system, appliances, smart home devices, and anything plugged in or hardwired.

Modern homes are especially vulnerable. Variable-speed HVAC systems, smart thermostats, and appliances with digital control boards are highly sensitive to voltage fluctuations. An older single-stage AC unit might survive a modest surge. A high-efficiency system with an inverter-driven compressor may not, and the repair cost often exceeds what the homeowner expects.

There is also the restoration event problem. When power comes back on after an outage, it does not always come back clean. Voltage spikes during grid restoration are a leading cause of appliance and HVAC damage, and they happen right after the storm, when most people assume the danger has passed.

What to Check Before Storm Season Arrives

Your electrical panel. If your home has a panel that is more than 25 to 30 years old, it may lack the modern overcurrent protection that newer homes rely on. Look for scorch marks around breakers, a warm panel door, or breakers that trip frequently. Any of these are signs to call a licensed electrician before summer hits.

Whole-home surge protection. A power strip is not surge protection, at least not in any meaningful way for a direct or near-direct lightning event. A whole-home surge protector installs at your main panel and intercepts voltage spikes before they reach your wiring. It is the single most cost-effective electrical upgrade most homeowners can make heading into storm season, typically running $200 to $500 when installed by a professional.

Outdoor components. Check that exterior GFCI outlets are functioning and covered. Inspect the disconnect box near your AC condenser for signs of corrosion or pest intrusion. Make sure no debris, vegetation, or fencing has crowded the condenser unit, as storms can turn that into a problem fast.

Your HVAC system. Capacitors and control boards are the most common casualties of power surges in HVAC equipment. A pre-season inspection can identify components that are already weakening and replace them before a storm makes the decision for you. Shipley Energy’s HVAC service technicians offer tune-ups and inspections that cover electrical connections, capacitor health, and overall system readiness heading into summer.

What to Do When a Storm Is Approaching

Once a storm warning is in effect, a few quick actions can meaningfully reduce your exposure:

1. Unplug high-value electronics that are not protected by a whole-home surge protector, including TVs, computers, gaming systems, and anything with sensitive circuitry.
2. Set your thermostat to a moderate hold and avoid running the HVAC system actively during peak lightning activity. The compressor and control board are at their most vulnerable when energized.
3. Know where your main breaker is. If you lose power during a storm, turning off the main breaker before restoration can protect your system from the voltage spike when power returns.
4. After the storm, wait. Give the grid a few minutes to stabilize before cycling your HVAC back on. Restarting immediately during or right after restoration is a common cause of surge-related failures.

Should You Have a Backup Generator?

For many homeowners, this question comes up every time a storm knocks out power for more than a few hours. The answer depends on your situation, but the case for a standby generator is stronger than most people realize.

Portable generators are a common choice: lower upfront cost, flexible, and useful in a pinch. But they require manual setup, carry real carbon monoxide risks if operated improperly, and cannot protect your home automatically when you are not there.

Standby generators, the kind installed permanently outside your home and connected to your natural gas or propane supply, operate differently. They monitor your power supply continuously and restore power within seconds of an outage, automatically and without any action required on your part. When you are away from home during a storm, your HVAC keeps running, your sump pump stays operational, and your refrigerator does not lose a full day of food.

Only about 15% of homeowners currently have a backup generator, which means most households are entirely dependent on the grid every time severe weather rolls through.

Shipley Energy installs whole-home standby generators fueled by natural gas or propane. From sizing and permitting to electrical setup and fuel line connection, Shipley Energy handles the full installation and offers service plans to keep your system ready year-round.

If you are already a Shipley Energy propane customer, the connection is even more straightforward, as your generator can draw from your existing supply.

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After the Storm: What to Inspect

Once conditions clear, a quick walkthrough can catch problems before they become bigger ones:

• Check your electrical panel for any tripped breakers. Reset them one at a time, cautiously.
• Cycle your HVAC system and listen. Unusual sounds, weak airflow, or a system that starts and quickly shuts off may indicate surge damage to the capacitor or control board.
• Test your GFCI outlets, especially in bathrooms, kitchens, and outdoors.
• Check your sump pump if you have a basement. A failed pump during a heavy rain event can cause thousands in water damage.
• Look for scorch marks near any outlets, switches, or at the panel door.

Any burning smell, repeated tripping, or system behavior that seems off warrants a call to a licensed professional before you continue using the affected system.

The Takeaway

Summer storm prep does not require a major project. A whole-home surge protector, a pre-season HVAC inspection, and a clear action plan for when severe weather is forecast will protect most homes effectively. For homeowners who want a more complete solution, one that removes the uncertainty of grid outages entirely, a standby generator is the most reliable answer.

Shipley Energy‘s HVAC technicians serve homeowners throughout the region. Whether you need a pre-season tune-up, a surge-resilience assessment, or a consultation on whole-home generator installation, we are here to help you get prepared before storm season arrives.

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