Frequently Asked Questions 

Browse below for our most frequently asked questions. If your question isn’t listed please ask your question at the bottom of the page

What is an EMP Shield?

EMP Shield™ is the worlds only tested and approved EMP protection technology for an entire electrical system.

The EMP Shield is a very robust electrical surge arrestor, designed to exceed the requirements of MIL-STD-188-125-1 for shunting over-voltage spikes to ground and neutral very quickly.

Built to exceed military standards (MIL-STD-188-125-1), EMP Shield is also one of the worlds fastest whole home surge protectors operating in less than 1 billionth of a second.

EMP Shield is designed to protect an entire home from Lightning, CME (coronal mass ejection, power surges, and an EMP (electromagnetic pulse). Proven and tested at Keystone Compliance, a Federally approved Department of Defense (DOD) testing facility, Our EMP Shield was struck with over 40x EMP strikes with no impact to the device.

MIL-STD-188-125-1 requires that the over-voltage spike from the E1 spike begin shunting 5,000 Amps within 20 nanoseconds. All EMP Shield models start shunting over voltage in less than 10 nanoseconds, while some models are able to begin shunting over voltage in less than 1 nanosecond. The EMP Shields are also designed to continue protecting through the expected durations of the E2 and E3 spikes produced in a HEMP strike.

What is an EMP?

A nuclear EMP is defined as having 3 distinct pulses of voltage/current. The E1 pulse is caused by the gamma rays released during the nuclear reaction. The Gamma rays interact with the electrons and the nucleus of the atoms that make up the atmosphere, and this interaction results in freeing electrons from their atoms. The free electrons ionize the atmosphere (ionization results in electron flow), which can be seen as the flow of electricity through anything that acts as an antenna. All of the wires that make up our nations’ electrical grid make an excellent antenna, which will produce an over-voltage condition throughout the affected area. For an optimally positioned detonation (approximately 300 miles high and over the center of the US), the entire nation will be affected by the E1 pulse. The E1 pulse starts at the time of the detonation of the weapon and continues until 1 microsecond after the detonation.

The E-2 pulse starts at 1 microsecond and continues until approximately 1 second after the detonation. The E-2 pulse is caused by the inelastic scattering (matter bouncing off of other matter) of the matter from the nuclear weapon interacting with the matter that makes up the atmosphere continuing to ionize the atmosphere.

The E-3 pulse starts at approximately 1 second after the detonation and can continue for several minutes. The E-3 pulse is caused by the nuclear detonation distorting the earth’s geomagnetic structure, and then its reconfiguration. As the magnetic lines are pushed out of configuration and then come back into normal configuration, electricity is generated, and flows through the atmosphere until it contacts an antenna (wires).

The antenna that is most affected will be the nations power grid, but all arrays of wiring (even in your house) will act as large or small antennas, and will produce the flow of electricity and over-voltage conditions.

How Does EMP Shield Work?

The EMP Shield can see and protect all the electronics and equipment connected to your electrical system.

This is accomplished by shunting (shorting) the over voltage coming in from the Grid and the voltage surges that are collected within your home.

Whether the electrons are collected within your home or are attempting to come into your electrical system from outside the home (the grid), the EMP Shield will see the surge and protect your electrical system.  The EMP Shield reacts in less than 1 billionth of a second. Since the shunting is completed incredibly fast, the over voltage is drained away from the equipment before the voltage can rise high enough to damage any equipment. We call this new technology SightSpeed™

Does this EMP Shield device work in every country?

Yes, it does – but for people ordering outside the USA they need to email us or put a comment in their order as in what country they are planning to use the device. If the unit for their voltages is not in stock we can have one ready to ship in 48-72 hours

Will the EMP Shield work on solar power systems?

Yes, however, we will need the operating voltage of your system (like 12v, 24v or 48v). Send us an email or put a comment in your order as to what voltage your system uses for the panels. If the unit for your voltage is not in stock we can have one ready to ship in 48-72 hours.

Is the EMP Shield hard to install?

No – We recommend you have it installed by a licensed electrician and/or used in accordance with electrical codes and regulations. However, it is very simple to install.

Is the EMP Shield Home Model attached to my homes breaker box?

We have ways for you to mount the EMP Shield box (6″ wide x 2.5″ tall x 3.0″ deep) on the wall beside your breaker box, inside the breaker box and inside the breaker box with a small LED box just outside the edge of the breaker box so you can see the status of all the lines.

Can we use the EMP Shield on our boats, vehicles, or aircraft?

Yes you can. You need to email us or put a comment in your order telling what brand, model and operating voltage your boat or aircraft uses.


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Have More Questions?

Ask us Below in the Comments


  1. Ask below if you have any additional question

  2. Can you also comment on natural occurring EMP events? Such as Sun Flares?
    Thanks, RLT

  3. Hello! Our device does also protect from solar flare (known as coronal mass ejections). Thanks for the question. We will be sure to add that into the frequently asked questions above.

    Please let me know on here if you have a more specific question and I will be happy to assist!

    Respectfully, -Andrew

  4. Just how would your devises protect a car that is not plugged into a power source?

  5. I’ve read about wrapping electronic items that are not plugged in into a foil protected and sealed environment to preserve their electric functionality should a strong EMP occur. Is this still a good idea or should we keep everything plugged in with an EMP house shield. Seems like having a back up solar system with solar generator unplugged but wrapped would allow it to work should the entire power grid system go down for a long period and solar is needed for barely sustainable nrg.

    Is this a reasonable approach? Just doesn’t seem like plugging everything in just to make sure it is protected is good for the budget:) Thoughts? I actually have wrapped and secured some vital electronic items (mostly a solar setup that I do not currently need to set up) that must be able to function outside of power grid should it go down. Is this the best way to protect it? Thank you

  6. Hello, Great question! Yes it will. The device functions and is monitoring at all times. It even operates if the vehicle has no power.

  7. Ann,

    A faraday cage is an excellent idea for devices not plugged into your homes electrical system. However, everything plugged into your system with the shield installed will also be protected :)

    Having a backup power source is also a great idea that way you will still have a power source after the grid goes down. You can protect it with a faraday cage (metal trash can lined with cardboard + lid on) is an inexpensive method that offers great EMP protection.

    You can also use the EMP Shield plug-in model or home model on the generator to protect it. Also, if the generator is connected to your home system with no switch, it will be protected.

    Here is a link to our generator model EMP Shields –

    Thanks for the question as I am sure many folks have the same question.


  8. If lightening enters the system at a different point than the incoming power supply will this unit protect my home?

  9. Are the units that you sell to the military the same as the ones available commericaly and if they are more robust are the available for purchase?

  10. Hello Dan,

    Unfortunately our military models are not available to the public. However, our public models are proven to defend against an EMP, solar flare, lighting, and all forms of power surges.

    Please let me know if you have any questions.


    -EMP Shield

  11. Does the vehicle device work when the car is not running and when running? Also I assume here is a way to ‘reset’, or does it simply shunt the ‘over’ volts?

  12. I live in the mountains and due to severe winter weather, I have a whole house generator, do I need a shield for my electric system AND my generator? Thx!

  13. In regards to the vehicle model. When installed and after being exposed to an event (EMP, solar event, etc.), the vehicle will start, run, and be usable as transportation? Am I correct in this assumption?

  14. Our home is a older manufactured home. The main breaker panel is located outside on a pole. Do you offer a EMP shield for outdoor insulation?

  15. Hello Edward, Our unit is IP66 rated and can be installed outside.

    Thanks for the great question and please let us know if there is anything else we can answer.


  16. Mike,

    That is correct Sir.


  17. Janis,

    Great question! It depends. If your generator is on an auto transfer switch, hen you will need a second device to be installed on the generator side of that switch. If your generator is directly connected to the home, you will only need 1x device (will protect your home and generator simultaneously).

  18. Ed,

    Yes Sir. The car does not need to be running. As long as the EMP Shield is installed, it is protecting your vehicle.

    Thanks for the excellent questions Sir.


  19. Randy,

    Yes Sir. It does not matter where the electricity is induced. It can come from the grid or directly into the home. The shield will protect against.



  20. I have a whole house generator, would one unit protect then house and generator or would I need to protect the generator separately?

  21. Tom,

    Great Question! It depends on 1 thing. If your generator is on an auto transfer/manual transfer switch, you will need a second shield to protect it. That shield will install on the generator side of the switch.

    Please let us know if you have any other questions.


  22. How many square feet does this device cover? My house is 1100 sq feet. Would this cover my whole house?

  23. Hello :)

    The home model protects up to 10,00 SQ FT.

    Great questions! Please let me know if you have any other questions!

  24. Does a quality whole home surge protection system protect against EMPS, CMEs, solar flares, etc.? Thanks.

  25. Great Question. Most surge protectors cannot even give a 100% guarantee then can stop a lighting strike let alone an EMP. The reason being, the E1 and E2 portions are VERY fast which is why our device shunts in 500 trillionths of a second. Next, the E3 portion of an EMP can go for hours which is why we utilize load shedding technology and the ability to protect up to 220,000+ AMPS. Our device also detects rise in voltage regardless of where the voltage occurs.

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