• Power Failure? Get Instant SMS or Call Alerts

Power outages can be costly. Learn how to receive prompt blackout alerts directly to your phone when the power goes off.

Why Do You Need Reliable Power Alerts?

A woman found that her food spoiled due to a power failure

Unexpected blackouts can cause serious problems, from spoiled food to damaged electronics. Sudden power interruptions are unpredictable, making it crucial to have a reliable power loss alarm.

Actually, if you're here, you probably don't need us to explain to you how a timely power failure alarm for freezer units helps avoid costly losses, how it safeguards medical equipment or critical data storage. It also protects sensitive equipment or IT infrastructure at remote locations. If you're away when power cuts happen, quick alerts keep you informed, giving you time to act.

So, what's the best mains power failure alarm? One that does not just offer peace of mind but actively notifies you when needed — without depending on unreliable Wi-Fi.

Meet iSocket – Your Smart Power Failure Notification Device

power outage alarm device

iSocket is a smart power failure alarm system that plugs directly into an outlet and instantly alerts you when a blackout occurs. It operates without Wi-Fi, using mobile networks to send immediate SMS and call alerts during a power interruption.

Since 2009 this easy-to-use device offers effective protection for your home, office and equipment. Trusted worldwide for over 15 years, iSocket is the top-rated and reliable power failure SMS alert device that keeps you informed in real time


Watch this Short Video About iSocket – The Original Plug-and-Go Power Loss Alarm with SMS and Call Alerts (Upgraded in 2021)

What Features Does iSocket Have?

Instant blackout alerts are just the start. With iSocket, you can remotely control devices connected to a socket — from lighting to routers. Power equipment on or off from anywhere in the world — or even reboot a router remotely if needed.

Additional optional features include temperature monitoring, security alerts, and water leak detection, making iSocket more than just an outlet power loss alarm. It's a complete solution that adapts to your needs, including integration with your solar installation to monitor power status and temperatures remotely.

Power icon for alarm outlet

Power Sensor

iSocket connects to your power outlet and immediately alerts you when electricity goes out or comes back.

iSocket suitable for remote reboot icon

Remote Reboot

Effortlessly restart your router or other IT devices remotely when unresponsive.

iSocket offers free test period icon

Free Test Period

Try your iSocket free for a month — no hidden fees, no strings attached.

power outage alerts by SMS with iSocket
iSocket uses Progressive Web App icon

Progressive Web App

Conveniently manage your iSocket from any device — phone, tablet or computer.

iSocket is a very safe device icon

Incredible Security

Your data stays safe with multiple layers of built-in security.

iSocket made in Finland icon

Made in Finland

All iSockets are designed and manufactured in Finland, meeting strict quality standards.

How Does the iSocket Power Monitor Work?

The primary function of iSocket is to provide immediate alerts when electricity is lost. As soon as power is interrupted, this power out alert sensor sends SMS, call, or email notifications, keeping you updated without the need for Wi-Fi.

iSocket mains power failure alarm is easy to set up and operate. You’ll begin receiving notifications right away.

Order your iSocket now

BUY NOW

Our simple one-page checkout makes ordering easy. Select your application, and we’ll recommend the best plan and accessories for your needs. Enjoy free shipping — on average, within 3 business days.

iSocket is Plug-and-Go

PLUG INTO A WALL SOCKET

Plug iSocket into a power outlet, and it will automatically connect to the mobile network. It arrives pre-configured based on your order, making it a true Plug-and-Go solution.

You will get power failure alert to your phone

GET AN ALERTS WHEN THE POWER IS INTERRUPTED

iSocket instantly notifies you when the power supply is disrupted, allowing you to respond quickly and prevent potential damage.

The setup is truly simple! We configure your iSocket IoT Portal account in advance, so the device works right out of the box. There are no complex setups or extra phone lines required.

iSocket power outage alarm device for North America

A Small Investment for Reliable Power Failure Alerts

Just one unmonitored blackout can cause significant loss. iSocket’s reliable power failure notification device provides instant SMS or calls, helping you react quickly. Easy to set up and completely mobile-based — no Wi-Fi needed.

Where Do People Use iSocket?

People around the world trust iSocket for reliable electricity outage notification. It monitors power outages in homes, offices, data centres, boats, farms, and remote locations. Whether you need a freezer power loss alarm or protection for sensitive solar powered equipment or security alarm system, iSocket provides instant notification, helping you react quickly and prevent losses.

  • Homeowners and businesses rely on iSocket to track power failures, protect appliances, and start or stop equipment remotely when needed.
    Power Cut Alarm for the UK
  • Farmers like John use iSocket as a power failure detector to monitor cattle feeders, irrigation systems, and other critical farm operations.
    Power cut alerts to cell phone for farmers
  • When a power outage occurs at the dock, Nicky and Anna instantly receive an alert, ensuring their boat’s battery and electrical systems remain protected.
    Shore power lost alarm by SMS to mobile
  • IT professionals trust iSocket for outlet power failure alarms, helping prevent downtime and data loss by monitoring power supply in server rooms and data centres.
    Power cut monitoring in datacentres
  • The seafood industry relies on iSocket’s outage monitoring to ensure power stability for pumps, refrigeration, and processing equipment, preventing spoilage and financial losses.
    Power outage monitor for fishing and seafood industry
  • Greenhouse owners like Alberto use iSocket as an outage tracker to monitor power supply, automate irrigation, and maintain ideal growing conditions.
    Power cut monitor in a greenhouse

If you didn’t find an exact match for your application, iSocket still provides peace of mind by keeping you informed about power status. Try it risk-free with our 30-day money-back guarantee — if it’s not the right fit, simply return it.

What Customers Say

We believe real customer experiences speak louder than words. Rick McAndrew, a boat owner from Australia, has firsthand experience with the challenges of shore power loss. Back in 2015, he reported how iSocket promptly alerted him to a power failure at his docking station, safeguarding his vessel. His testimony remains just as relevant today, emphasizing the undiminished importance of instant power loss notifications.

While this video features an older iSocket model that required a SIM card, today’s Plug-and-Go iSocket offers even more convenience. It connects instantly, works straight out of the box, and notifies you the moment a power outage occurs — without the hassle of setting up your own connectivity.

iSocket power outage alarm device for North America

Get Your iSocket Today – Reliable Protection from Unexpected Blackouts

Power interruptions can disrupt essential equipment and cause unexpected losses. iSocket is a smart power failure alarm device that instantly alerts you by SMS or call whenever power is lost. Stay ahead of problems with this easy-to-use blackout alert system.

The Best Power Failure Alarm Since 2009

Reliable power outage detection is crucial. iSocket leads in mobile-based power failure alarms, with over 15 years of experience. Designed to send fast blackout alerts directly to your phone, the iSocket power failure alarm device keeps you informed instantly — no Wi-Fi necessary.

Whether you're protecting freezer contents, solar installation, EV or other sensitive electronics, iSocket provides consistent alerts to ensure you're always prepared.

iSocket certified icon

Certified for the US

iSocket operates on any network icon

Connects Anywhere Mobile Coverage Exists

iSocket offers free shipping icon

Fast Free Shipping (2-5 days)

iSocket offers manufacturer support icon

Direct Manufacturer Support

Who Are We?

We are iSocket Systems, inventors of the original mobile-based power failure notification device that we called iSocket. Since 2009, we've provided reliable blackout alerts to homes and businesses globally.

Our experience ensures that the iSocket power loss alarm delivers timely notifications whenever an AC power supply failure occurs, no matter the reason or how challenging the scenario. You likely agree — the creators of this technology understand it best.

Our team continually improves iSocket, helping you respond quickly to outages and protect your assets effectively.

original-product

100% Genuine Product

We design, build, and directly support every iSocket we sell — you’re getting genuine quality from Finland.

top-quality

Top Quality Guaranteed

iSocket undergoes extensive testing and meets international standards, ensuring high quality and reliability.

authorised_new

Authorised Distribution

We are the manufacturer, and we fully stand behind our product.

iSocket is a registered trademark

We're Here to Stay

We invest in and protect our technology worldwide — your iSocket comes from a trusted brand that's here to stay.

satisfaction

100% Customer Satisfaction

Thousands of satisfied customers worldwide trust iSocket. We know you’ll love it too.

moneyback-guaranteed

30-Day Money-Back Guarantee

If iSocket doesn’t meet your expectations, return it within 30 days for a full refund.

Ordering Steps

Become a delighted iSocket owner in just a few simple steps.

Buy your iSocket now button

Click 'Buy Now'

You will get your iSocket quickly icon

Quick Delivery: We ensure fast shipping directly to your doorstep.

You are happy with your iSocket icon

Start Using: Works right out of the box. Satisfaction guaranteed.

FAQ

Nope! When power fails, the Wi-Fi will too. iSocket is a cellular solution!
You don't need your own SIM card or data plan. This new (since 2021) iSocket is a Plug-and-Go hassle-free solution with integrated connectivity that allows your iSocket to be connected to any available cellular network. We offer you a plan in proportion to the features you use. You will see your plan on checkout after you have selected your applications. Our prices are better than anything you would get from a local provider. More, you get not just a bare connection as it would be with your local provider, but also a convenient interface to work with iSocket and amazing support that we could not provide if we were selling you just hardware. On the top of that you have 30 days free test period and 30 days money back warranty.
The whole idea of this new (since 2021) iSocket is that it is a hassle-free solution where end users do not have to think about SIM cards, networks and so on. The first 10 years (since 2010) that we only sold hardware our support team was overfilled with questions about numerous problems related to SIM cards and SMS deliverability. We would say that about 99% of the problems were for this reason. We won't that poor experience to our customers anymore.

In any case, you should have paid your mobile operator for the SIM card and data usage. Text (SMS) control is not even considered - this is an outdated technology that does not allow any quality real-time monitoring. Delivery of non-human generated SMS in many countries is regulated and more and more countries impose restrictions on this. This is especially true in North America and Australia. It is also noticeable that the SMS-only plans have become a rarity. Texting (SMS) from machines to humans is not reliable in any country anymore.

The main plans of mobile operators are designed to use a large amount of data for Internet browsing. New special plans for IoT (Internet of Things) usually have a small amount of data for a considerable fee. Our plans are developed in proportion to the features used and they are more beneficial for you that any plans from local operators.

Additionally, you get not just a bare connectivity but an all-in-one solution. On the top of just connectivity that you would anyway need to buy from your provider you get an absolutely convenient interface for managing your iSocket, guaranteed connection to ANY available mobile network and we after all will be able to provide effective support, which is impossible when clients use their own SIM cards.

In all respects, the new iSocket with built-in connectivity is much better!

Not saying that this is iSocket to last - it supports all modern mobile technologies that are here to stay for next decades.
Yes, you can! Text, voice or email notifications about power outages as well as power restore events are available in this new iSocket since 2021. Voice messages can be customized. Voice alerts about power outages are highly recommended, because they are not affected by different regulations/restrictions enforced by operators for text messages in some countries even though we are whitelisted for such alert.
In the new Plug-and-Go iSocket since 2021 you can add unlimited phones for power outage alerts as well as for notifications about other alarms, such as temperature rise / temperature fall, burglar, water leak, gas leak, etc.
Connectivity is integrated into iSocket. We pay third parties multiple fees even when you don't pay us. You can stop use it anytime, it is not a contractual agreement. There are options to suspend it temporary but they are mainly designed to protect you from loss of your devices. Please see Terms of Use for details - in Chapter 9 we explain by a non-bureaucratic language how it works. You may find this policy fine for your purposes. Otherwise please consider your cost as an annual cost - similar like what you pay to insurance companies for your car, home and never use it, or what you pay for a broadcasting, TV, etc. - even if you don't use them all the time, or taxes you pay for a remote cabin that you visits only few times in a year and probably never in Winter time.
Of course! We do not store your card details. Our payment provider BlueSnap is PCI compliant. You can also pay with PayPal if you wish so.
The warranty terms for products purchased from different retailers can vary. You need to contact the retailer who sold you the product in a warranty case. If you have ordered the product directly from iSocket Systems, we offer at least one year full warranty from the date of purchase. If you experience a fault, please contact us. We aim to give you full satisfaction when dealing with warranty! That is our advantage in compare with no-name sellers or corporations who don't care after they sold the product to you.
All iSockets are designed and assembled in Finland to strict quality standards. iSocket Systems is a manufacturer of devices. iSockets are not re-branded or re-manufactured from someone else's products, they are original, made by iSocket Systems with quality to last. The products come with the appropriate certification.
Products from the iSocket Smart Sockets family have been designed for consumers. You do not require specific knowledge to install and use smart sockets. They are plug-in devices. The products from the iSocket Smart Home family are products for integrators who undertake installations for their customer. These products require to be wired up and must be installed by qualified personnel with specific knowledge. In most countries only qualified personnel are legally allowed to perform installations on an AC network. However if you use products from the iSocket Smart Home family, e.g. iSocket Smart Relay in a house with DC voltage only (e.g. houses powered from sun panels), then you are most probably allowed to do the wiring yourself.
We have a full 100% burn-in test during manufacturing. We perform a functional test before shipping. This test can take up to 30 minutes per product, as a specially designed system checks all aspects of iSocket performance based on extensive documentation. When you buy directly from iSocket Systems, our system verifies that the test has been passed. The product that did not pass the test cannot be sent - the system will detect and prohibit it. We pay particular attention to signal strength. We reject units if the signal quality is lower than usual for the area where we perform the test. If the product has a temperature feature and is ordered with a temperature sensor we test it and check that it shows temperature correctly. Then we also check the power outage feature for devices where this feature is available. Finally, we reset the device to the default and package it for dispatch. It is 100% guaranteed that you will get a tested and working product.
We are a company with reputation who invented these power outage monitoring technologies more than 10 years ago when the world did not know about them. We are innovators of them and we are here to stay!
Any mobile phone! Even a phone from your grandmother, if this is cellular ;) Seriously, though, it does not matter if you have an iPhone, Samsung, BlackBerry, a contracted Verizon phone or locked AT&T phone or even an old Nokia 250. In fact, iSocket and your phone are independent from each other. You only need a phone to accept text messages or calls about power outages and other alarm events - the same way as you accept messages and calls from your friends. Moreover, iSocket can send a voice message to a landline phone. You can manage your new Plug-and-Go iSocket from a computer if you don't have a smart phone.
You don't need your own SIM card or data plan but you will have a plan with us. We offer you a plan in proportion to the features you use. Since 2021 iSocket is a hassle-free solution with integrated connectivity that allows your iSocket to be connected to any available mobile network out of the box. We pay cellular service providers a base fee to keep your iSocket up and running. On the top of that we pay a fee for data usage. We also pay to datacenters to support 24/7/365 operation of your iSocket. In fact the largest part of the payment will go to third parties. At the same time, our prices remain better than what you could get from local providers, because we buy services in large volumes.

When you only use iSocket occasionally we continue pay for such services to thirds parties. Finally, just a remote switching (reboot) feature uses the same amount of data/services as any other feature such as power outage alerting or even more, because it require the unit to be always online in order to access it remotely.
For a house in France it would be better to buy the model with a French plug. If you browse our website from the UK you will see models with a British plug in the list first. Tell us about preferable plug in comments to your order.
We use is a classical prepaid model - you can put any amount on your account balance and your service fees will be reduced from it according to your plan and text/voice messages or other one-time fee operations usage. Billing is daily for the plan (which means a certain amount is deducted from your account balance daily according to your plan) or based on the event for a one-time fee operations like text/voice messages (i.e. Pay As You Go, PAYG). Say, you put $100, your plan is $3.99/mo and you've got 200 messages for a given year. Your account balance will be $34.12 by the end of that year ($100-$3.99*12-200*$0.09). If you can figure out what will your average usage for text/voice messages about power outages or other alerts you can top up your account balance for the amount you need for one year. You can add additional features to your plan anytime you wish, it will be changing your monthly payment and so your account balance will be deplete earlier. We provide all details about your plan and fees in the 'Billing' section of your account. Everything is transparent and it's up to you to decide how much you put on your account balance in advance. You can configure auto top up too.
You have full rights to return a product in accordance with the terms of your retailer and the legislation prevailing in your country. Please check the terms of sale and return in each individual case with your retailer. If you purchased the product directly from iSocket Systems we offer a full money-back guarantee up to 30 days together with free test period up to 30 days.
Nope! We have 10+ years of experience in this field and we've invented these monitoring technologies. We know your needs and we are able to amaze you with how simple and easy everything will work out of the box without a complex configuration. We will configure iSocket for you based on your order and you can do changes anytime you wish via a convenient interface from your mobile phone or computer. This new (since 2021) iSocket that combines all our 10+ years experience is really awesome! Power, energy, temperature and alarm monitoring were never that easy!

Only for some alarm sensors (motion, smoke or gas detectors) you will need some help with wiring. This is another story and only few customers require this.

Contact Us

We love to talk about your applications. We're here to help! You'll communicate directly with real people — no bots or automated systems. We aim to respond as quickly as possible because we understand that you're looking for a swift resolution to your issues!

For existing customers requiring technical support, please follow this link.

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Contact Sales

  • (650) 353-5786, 5 AM - 5 PM ET
    Toll-Free: 1-888-260-7578, 5 AM - 5 PM ET

    Canada: +1 647 495 9495
    UK: +44 20 4577 3635
    Global: +358 17 270 0029 (English)
iSocket power outage alarm device for North America

Stay Informed with iSocket: Your Proactive Power Cut Alarm System

Act before a power cut causes disruption. iSocket is more than just a smart plug — it's a complete power failure alert system that sends power cut alert text messages or call directly to your mobile. Thanks to easy setup and proven performance, this AC power loss alarm gives you control over your environment and helps prevent problems before they escalate.