Power cuts can quickly expose how dependent modern homes are on electricity. Internet access, refrigeration, lighting, heating, phone charging, and smart home systems can all become unavailable at the same time, especially during longer outages.
The key to handling an outage effectively is understanding which devices are practical to keep running and which appliances consume too much power for smaller backup systems. Phones, routers, LED lights, and laptops are relatively easy to support, while kettles, heaters, ovens, and microwaves place much heavier demands on backup power.
In this guide, we’ll explain how to manage a power cut, which devices should be prioritised first, and how portable power stations, generators, and home batteries compare for emergency home backup. If you want a broader overview of emergency backup systems, our Backup Power for Homes guide explains the different options in more detail.
Check The Cause And Protect Essential Electronics
One of the first things worth checking is whether the outage only affects your property or the wider area. Nearby streetlights, neighbouring homes, and local buildings can usually help confirm this quickly.
If the issue appears isolated to your home, inspect the fuse box or consumer unit for tripped breakers. Faulty appliances and overloaded circuits can sometimes trigger local outages, particularly during storms or sudden surges.
It’s also worth unplugging sensitive electronics where practical, especially desktop PCs, TVs, games consoles, and expensive appliances. This can help reduce the risk of damage from voltage spikes when electricity returns.
For lighting, rechargeable LED lamps, torches, and work lights are generally safer and more practical than candles. Low-power LED lighting also works particularly well with power banks and portable battery systems. Rechargeable workshop lights and inspection lamps can also be useful emergency lighting options during longer outages.
Prioritise Internet, Communication And Low-Power Devices
Low-power devices are usually the easiest and most practical things to keep running during a power cut. Phones, routers, laptops, LED lights, radios, and smart security devices consume relatively little electricity compared to appliances like kettles, heaters, ovens, and microwaves.
A small power bank may be enough for short outages, while portable power stations can keep multiple devices running for much longer. If local broadband infrastructure remains active, compact battery systems or UPS units can also keep your WiFi router online during an outage. Our guides on How Much Power Does a Wi-Fi Router Need? and Best Mesh WiFi Systems for Home explain this in more detail.
Medical devices, alarms, and connected security systems are also relatively practical to support because many use surprisingly little electricity compared to high-power appliances.
The table below highlights which devices are easiest to support during a power cut and which appliances place the largest demands on backup systems. For a more detailed appliance breakdown, see our guide on What Can You Run During a Power Cut?.
| 🔌 Device | ⚡ Typical Power Usage | 🔋 Backup Difficulty | ✅ Recommended Backup Option |
|---|---|---|---|
| LED Lights / Torches | 5W–20W | Easy | Power bank or small power station |
| Mobile Phones | 5W–20W charging | Easy | Power bank or portable battery |
| WiFi Router | 10W–30W | Easy | UPS or compact power station |
| Laptop | 30W–100W | Moderate | Portable power station |
| Emergency Radio | Very low | Easy | Battery, USB, or hand-crank power |
| Fridge / Freezer | 100W–800W+ startup surge | Moderate to hard | Large power station or generator |
| Kettle / Electric Heater | 2000W+ | Very hard | Generator or large home backup system |
Food Storage And Heating During Longer Outages
Food storage becomes increasingly important during longer outages. Fridges and freezers can normally maintain safe temperatures for several hours if doors remain closed as much as possible, helping reduce unnecessary temperature loss.
Running refrigeration equipment from backup power is possible, but these appliances often require more power than many people expect due to startup surges. Portable power stations with sufficient output can sometimes support fridges intermittently, while generators and home battery systems are usually better suited to extended runtime requirements. Our guide on Can a Portable Power Station Run a Fridge? explains this in more detail.
Heating is typically one of the hardest systems to maintain during a power cut because electric heaters consume large amounts of electricity very quickly. Fan heaters, electric radiators, and portable heaters can drain compact battery systems in a short period of time.
In many cases, it is more practical to focus on insulation, layered clothing, blankets, and lower-energy heating strategies before attempting to power large electric heaters continuously from battery systems. Our guides on Cheapest Way to Heat a Home UK and Best Infrared Heaters UK explore some more energy-efficient heating options in greater detail.
Which Backup Power Option Is Best?
The best backup power solution depends largely on what you want to keep running during an outage and how long you expect the power cut to last.
Portable power stations are one of the most practical options for shorter outages and lower-power devices. They work well for phones, routers, laptops, lighting, radios, and some small appliances while remaining quiet and safe to use indoors. If you’re comparing models, our Best Portable Power Stations for Home Backup UK guide covers some of the strongest options currently available.
Generators are usually better suited to high-power appliances such as kettles, heaters, microwaves, and larger refrigeration systems. They can provide much longer runtimes than battery systems, but they require fuel, regular maintenance, and proper outdoor ventilation for safe operation.
Home battery systems sit somewhere in between. These systems are designed for more permanent backup power setups and can often supply electricity automatically to selected household circuits during outages. Many are also paired with solar panels for improved long-term energy resilience.
If you’re deciding between these different approaches, our Portable Power Station vs Generator and Portable Power Station vs Home Battery guides explain the advantages and limitations of each option in more detail.
What Should You Avoid During a Power Cut?
Not every appliance is realistic to run during a power cut, especially when using smaller backup systems. High-power devices such as kettles, heaters, ovens, and microwaves consume large amounts of electricity and usually require generators, large home batteries, or high-capacity portable power stations.
In contrast, lower-power essentials such as phones, WiFi routers, laptops, LED lighting, and radios are much easier to keep running during outages and can often operate for many hours from relatively compact battery systems.
The key is understanding which devices matter most for your household and choosing a backup system that matches those priorities realistically. For some homes, a small portable power station may be enough for emergency communication and lighting. Others may benefit from larger whole-home backup systems designed for longer outages and higher-demand appliances.
If you want a broader overview of emergency home energy systems, our Backup Power for Homes guide explains portable power stations, generators, solar charging, and home battery systems in more detail.
How To Prepare Before a Power Cut Happens
Preparation is often far more important than the outage itself. Even a relatively small backup setup can make a major difference if it is charged, organised, and ready before power is lost.
Power banks, rechargeable lights, emergency radios, and portable power stations should all be checked regularly to ensure batteries remain charged and functional. It’s also useful to keep charging cables, extension leads, and basic emergency lighting in easily accessible locations rather than packed away in storage.
Internet and communication planning is another area many people overlook. If staying connected is important during outages, it may be worth understanding your router’s power requirements and testing how long your backup system can realistically keep networking equipment online. Our guide on How Much Power Does a Wi-Fi Router Need? explains this in more detail.
For longer outages, it’s also worth thinking about refrigeration, heating, and cooking ahead of time. Understanding which appliances consume the most electricity can help you avoid unrealistic expectations when choosing a backup system. Our guide on What Can You Run During a Power Cut? explores appliance power requirements and backup limitations in greater detail.
Final Thoughts
Power cuts are much easier to manage when you understand which devices matter most and how much electricity they realistically require. In many cases, keeping phones, lighting, routers, refrigeration, and a few essential electronics running is far more practical than attempting to power an entire home.
Portable power stations are often the simplest solution for smaller devices and shorter outages, while generators and home battery systems are usually better suited to larger appliances or extended disruptions. The right setup depends largely on how long outages typically last in your area and which devices you consider essential.
Preparation also makes a huge difference. Even relatively small backup systems can be extremely useful if they are charged, organised, and ready before an outage happens.
If you’re building a more complete home backup setup, our Backup Power for Homes guide explores portable power stations, generators, solar backup, and home battery systems in more detail.
FAQs
One of the first things to check is whether the outage only affects your home or the wider area. After that, focus on lighting, communication devices, and protecting important electronics from potential power surges when electricity returns.
Yes, in some cases. If your local broadband infrastructure remains active, a UPS or portable power station may be enough to keep your router running for several hours.
Electric heaters, kettles, ovens, microwaves, and cooking appliances are usually among the highest power-consuming household devices. These can quickly drain smaller battery systems.
For many households, portable power stations are enough to support phones, routers, laptops, lighting, and some small appliances during short outages. Larger appliances often require more powerful systems or generators.
Thanks for reading our article on what you should do during a powercut.
Feel free to leave a comment below if you have any thoughts or queries that you’d like us to take a look at – we’d be happy to help.
