Made in the USA | ETL Listed Surge Protection
American-Made Surge Protection for Residential, Home, HVAC, Marine, and Commercial Applications
Bad Wolf designs rugged surge protection solutions to help protect electrical systems and sensitive equipment from lightning, utility switching, and everyday surge events.
Service-Disabled Veteran-Owned Small Business • Indoor/Outdoor Options • U.S.-Based Support
Trusted Protection for Real-World Installations
Bad Wolf products are built for dependable surge protection, cleaner installs, and long-term reliability in demanding environments.
Made in USA
American-made surge protection solutions
Veteran-Owned
Service-disabled veteran-owned small business
ETL Listed
Tested and listed for qualifying models
UL / CSA Compliance
Built to recognized surge protection standards
BABA Compliant
Supports Build America, Buy America requirements
U.S.-Based Support
Real support from a knowledgeable U.S. team
Find the Right Surge Protection for Your Application
Choose the best Bad Wolf solution by market, installation style, or equipment type.
Whole House Surge Protection
Protect panels, appliances, electronics, and connected home systems from damaging surge events.
HVAC Surge Protection
Help protect condensers, air handlers, control boards, and related equipment from damaging voltage spikes.
Marine Surge Protection
Protect NMEA 2000 networks and marine AC/DC electrical systems in demanding environments.
Generator Surge Protection
Protect generator-related systems and connected loads from surge damage and unstable power events.
NMEA 2000 / DC Protection
Purpose-built protection for sensitive low-voltage, DC, and networked electrical systems.
Dealer & OEM Programs
Partner with Bad Wolf to offer American-made surge protection solutions across multiple markets.
Why Choose Bad Wolf?
Bad Wolf surge protectors are built for real-world conditions and designed for dependable protection, cleaner installs, and long-term reliability across residential, commercial, HVAC, marine, and specialty applications.
Made in the USA
American-made surge protection solutions built for quality and reliability.
Broad Application Coverage
Solutions for residential, commercial, HVAC, marine, generator, and specialty uses.
Rugged Construction
Designed for demanding environments with durable indoor and outdoor-ready options.
Clear Status Indication
Quick visual status indication helps make inspection and service easier.
Trusted Compliance
Qualifying models are ETL listed and designed to recognized surge protection standards.
U.S.-Based Support
Get help from a knowledgeable team that understands real product applications.
Home Surge Protectors: What They Are and What They Protect
They help defend electrical equipment from voltage spikes caused by lightning, utility switching, and motor loads. They can reduce damage to electronics, appliances, HVAC controls, solar and EV chargers, and sensitive power supplies—helping prevent failures, extend equipment life, and avoid costly repairs.
HVAC
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Sensitive electronics: Modern HVAC units use control boards and sensors that can be damaged by brief voltage spikes.
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High-power motor switching: Compressors and blower motors create large inrush currents and switching transients that stress components.
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Outdoor exposure: Condensing units and long wire runs can pick up surge energy from lightning and utility events.
Appliances
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Sensitive electronics inside: Many appliances use control boards and power supplies that can fail from sudden voltage spikes.
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Motors and compressors: Fridges, washers, and HVAC-related appliances have motor loads that create and amplify electrical transients.
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Surges travel through wiring: Lightning, utility switching, and outages/restoration can send surge energy through home circuits into appliances.
EV Charger
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Sensitive power electronics: EV chargers use control boards and high-power conversion components that can fail from voltage spikes.
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Grid events hit hard: Utility switching, outages/restoration, and lightning-related surges can travel through the service panel to the charger.
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High-current switching stress: Frequent charging cycles and contactor switching can add electrical transients that wear components over time.
Question: Are whole-house surge protectors required by electrical code?
Answer: In many places in the U.S., yes—surge protection at the service is now required for homes.
Hover states for details & effective dates where available. Map is fixed (no zoom/pan).
Installed at the service entrance.
Listed for line-side use at the main disconnect.
What makes Type 1 different
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Line-side rated: Can be installed on the utility side of the main breaker/disconnect (where allowed by your installation method and local code).
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Built for the harshest surge location: It’s made to handle high-energy surges right where power enters the building.
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“First line of defense” in a layered system: It reduces the surge energy that reaches downstream panels and equipment.
What it helps protect against
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Lightning-related surges (nearby strikes that induce spikes on power lines)
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Utility grid events (switching operations, faults, and power restoration after outages)
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Large external transients coming in through the service conductors
What it helps protect
By cutting surge energy at the entrance, it helps protect everything downstream: your main panel and branch circuits, plus electronics like HVAC controls, appliances, computers, networking gear, smart home devices, solar/EV equipment, and more (often with additional Type 2/3 protection for best results).
Installed on the load side of the service disconnect.
The most common “panel-mounted” SPD used for whole-building protection.
What makes Type 2 different
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Load-side rated: Installed after the main breaker/disconnect, inside the electrical distribution system.
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Targets surges inside the building: It’s ideal for catching surges that come from the utility and surges created by internal switching loads (motors, compressors, LED drivers, etc.).
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Great for panel and branch-circuit protection: Can be placed at main panels, subpanels, or critical equipment panels to protect specific areas.
What it helps protect against
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Utility switching & power restoration surges that pass through the service equipment
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Motor and compressor transients (HVAC, refrigerators, pumps, shop tools)
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Internal switching spikes from electronics and power supplies (LED lighting, UPS/inverters, variable speed drives)
What it helps protect
By clamping surges in the distribution system, a Type 2 SPD helps protect downstream circuits and connected devices—including appliances, HVAC control boards, TVs, computers, networking gear, smart home devices, solar/EV equipment, and more. For best protection of sensitive electronics, it’s often paired with Type 3 point-of-use protection.
Installed at or near the device being protected.
It’s the “last layer” in a layered surge protection setup.
What makes Type 3 different
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Point-of-use: Located close to the equipment, not at the service/panel.
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Best for sensitive electronics: It’s designed to clamp smaller, residual surges that get past panel protection and to filter everyday electrical noise.
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Not meant for the harshest surge location: It relies on upstream protection (Type 1/2) to reduce the big surge energy first.
What it helps protect against
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Residual surge energy that remains after Type 1/Type 2 protection
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Everyday switching transients from motors, compressors, and power supplies
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Electrical noise/spikes that can cause glitches, reboots, or degraded performance
What it helps protect
Type 3 SPDs help protect sensitive plug-in equipment like TVs, computers, routers/modems, smart home hubs, gaming consoles, audio/video gear, security systems, and other electronics that are vulnerable to spikes and noise.
Why choose Bad Wolf surge protectors?
Bad Wolf surge protectors are built for real-world conditions—lightning, utility switching, and everyday electrical noise. Our products are designed for clean installs, dependable protection, and long-term reliability. When you want surge protection you can trust, choose Bad Wolf.
What makes us different:
• Made in the USA
• Options available for almost every application
• Rugged enclosures and clear status indication
• Support from a real U.S.-based team