Will Generators Work After an EMP?
Some might, most won’t. Old-school diesel and petrol generators could still crank to life, but modern inverter units are much more fragile. Keep reading to learn what happens to generators during an EMP, how to protect them, and which gear is most likely to keep the lights on.
Generator Risks During an EMP
An electromagnetic pulse (EMP) is like an invisible lightning strike on steroids. It can fry delicate circuits in seconds—sometimes even if devices are unplugged.
How EMPs Damage Generators and Electronics
EMPs come from solar storms or human-made sources, but the effect is the same: overloaded circuits and dead systems. For Aussies relying on backup power during storms, bushfires, or outages, knowing what’s at risk is critical.
Will an EMP Destroy Electronics That Are Unplugged?
Unplugging helps with lightning but not with an EMP. Energy can be induced directly into the device—meaning a generator controller stored in a shed can still fail. Only shielding, like a Faraday cage or EMP bag, provides real protection.
Will an EMP Destroy Batteries?
Batteries themselves usually survive—they’re just chemical storage. But modern battery management systems (BMS) contain fragile electronics that can fail instantly during a pulse. Without the BMS, the battery becomes far less useful.
Protecting Generators from EMP Damage
Not all generators face the same risk. Older diesel or petrol models with minimal electronics are tougher, while modern inverter generators are highly vulnerable.
How to Protect a Generator from an EMP
Three things matter most: simplicity, shielding, and distance. The fewer circuits, the safer. Shielding can be done with a DIY Faraday cage or a commercial EMP shield.
How to Build a Faraday Cage for a Generator
A Faraday cage acts like armour, redirecting energy around the device. For smaller generators, a galvanised bin lined with cardboard works. Larger setups might involve reinforcing sheds with mesh or wire. The principle is the same: keep the pulse out.
The Role of an EMP Shield
EMP shields attach directly to your generator or wiring, clamping surges before they fry sensitive parts. Think of them as surge protectors for extreme events. They’re not perfect but provide another layer of defence.
Generator Alternatives and Extra Protection
Generators aren’t the only concern—solar systems and smaller essentials can also be vulnerable.
Will Solar Panels Work After an EMP?
Solar panels themselves usually survive, but the electronics—charge controllers and inverters—often fail. Keeping spares in a Faraday cage means you can swap them out and bring your system back online after the event.
Using Faraday Bags for Small Essentials
Faraday bags block EMPs and work well for radios, phones, USB drives, and spare generator parts. They’re cheap, portable, and easy to store at home.
Conclusion: Generator EMP Protection
So, will generators work after an EMP? Some will, most won’t. Old-school mechanical models might keep going, but modern inverter types are fragile.
Preparation makes all the difference. With Faraday cages, EMP shields, or even a few EMP-proof bags, Aussies can safeguard their backup power and avoid being left in the dark.
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