Portable Chargers for Power Outages: Find the Right Backup for Your Needs

When the power goes out, having a reliable way to keep your essential devices charged can make all the difference. Portable chargers for power outages range from compact power banks that keep phones running to high-capacity portable power stations that can power compatible electronics and small appliances. The right option depends on what you need to charge, how long the outage may last, and how much backup power you need.

This guide covers the main types of portable chargers for power outages and what to consider when choosing one for your home.

Quick Answer: What Is the Best Portable Charger for a Power Outage?

The best backup option depends on what you need to power:

• USB power banks: Typically 20–100Wh, ideal for charging phones, earbuds, and tablets during short outages.
• Portable power stations: Usually 100Wh–1kWh, suitable for laptops, routers, lights, and compatible appliances.
• High-capacity home backup systems: Typically 1–5kWh or more, designed to run several essential appliances or provide backup power for longer outages.

Consider which devices you need to keep running, how long the outage may last, and how you can recharge the system before choosing a solution.

What Are the Different Types of Portable Chargers for Power Outages?

Not every backup device serves the same purpose. Understanding the differences helps you avoid buying equipment that cannot handle your essential loads.

Small Power Banks for Phones and Tablets

• Best for: Keeping phones, earbuds, smartwatches, and tablets charged during short outages or while away from home.
• Typical capacity: Around 20–100Wh, depending on battery size and model.
• Typical price: Approximately $20–$150, depending on capacity, charging speed, and port selection.

Small power banks are easy to carry and store in an emergency kit. They work well for personal electronics but generally lack the AC outlets and sustained output needed for household appliances.

Mid-Size Portable Power Stations for Everyday Essentials

• Best for: Running Wi-Fi routers, lights, laptops, fans, and selected small appliances for several hours during an outage.
• Typical capacity: Around 100–1,000Wh.
• Typical price: Approximately $200–$900, depending on capacity, AC output, and charging features.

These power stations offer more stored energy and a wider range of outlets than small power banks. They can support several devices at once, provided their combined power requirements remain within the unit's output limits. Actual runtime depends on the connected loads and conversion losses.

High-Capacity Home Backup Power Stations

• Best for: Powering refrigerators, multiple household appliances, home office equipment, and other essential loads during extended outages.
• Typical capacity: Around 1,000Wh to 5,000Wh or more, with some systems supporting additional batteries.
• Typical price: Approximately $800 to several thousand dollars, depending on capacity, output power, and expansion options.

Compared with smaller power stations, larger power stations offer more stored energy for longer runtime and higher AC output for demanding appliances. Expandable models can provide additional capacity when outages last longer than expected.

For example, the Anker SOLIX S5000 illustrates the specifications to consider when choosing a high-capacity power station for home backup:

• 5,024Wh battery capacity: Provides stored energy for compatible appliances and household devices.
• 4,500W rated output and 8,000W peak output: Supports compatible loads within its power limits. Check appliance running and startup wattage before connecting refrigerators or other motor-driven equipment.
• 120V and 240V output: Supports compatible household loads that require these voltage options. Confirm the appliance’s voltage and connection requirements before use.
• Expandable capacity up to 30kWh: Compatible expansion batteries can add stored energy for longer outages.
• AC and solar charging: Provides options for replenishing the battery, depending on available power sources and compatible equipment.
• Net weight: 97 lb. Built-in wheels and a pull handle make it easier to move, but the unit is not designed for handheld portability.

How to Choose a Portable Charger for a Power Outage

Choose a backup based on your outage scenario. Then estimate your devices’ wattage and runtime to determine the capacity you need.

How Much Battery Capacity Do You Need?

Estimate how much energy each device will consume during the outage. For devices with a relatively steady power draw, multiply their average power consumption by the number of hours they will run.

For example:

• Wi-Fi router: 10W × 24 hours = 240Wh per day.
• Laptop: 50W × 4 hours = 200Wh.

Together, these devices consume approximately 440Wh before losses. Add the energy requirements of other devices, then allow for conversion losses, standby power, and extra capacity for unexpected needs.

Actual consumption varies by device and workload, so use measured energy consumption or manufacturer-provided figures when available.

How Much Output Power Do Your Devices Require?

Check both continuous output and startup power. The station must handle the combined running load of devices used simultaneously, plus any additional power required to start motor-driven appliances.

For example, a 700W refrigerator, a 100W TV, and 60W of lighting have a combined running load of 860W. These figures are illustrative; check your appliances’ actual power and startup requirements before choosing a station.

How Long Do You Need Backup Power to Last?

Your required battery capacity depends on daily energy consumption and how long you need backup power. Using the router and laptop example above, their combined consumption is about 440Wh per day, or 1,320Wh over three days, before losses.

Allow extra capacity for conversion losses and standby power. Refrigerators cycle on and off, while microwaves typically run for short periods, so estimate their actual energy use rather than assuming continuous operation. For longer outages, compatible solar panels or expansion batteries can help extend runtime.

Which Charging Ports and Recharging Options Should You Check?

Check that the station’s ports meet your devices’ requirements and that you can recharge it during an extended outage.

• Output ports: Confirm USB-C Power Delivery wattage, AC outlet ratings, and any shared USB power limits.
• Wall or vehicle charging: Check charging compatibility and recharge time.
• Solar charging: Verify panel compatibility and the station’s maximum solar input.

Choose a setup that can support your essential devices and replenish enough energy for the expected outage.

Matching Portable Power Stations to Home Backup Needs

The best battery backup for a home power outage depends on which devices you need to keep running and for how long. Ready.gov's power outage preparedness guidance recommends planning ahead for essential equipment.

For emergency power at home, compare not only stored energy but also the station’s continuous output, startup capability, and options for replenishing energy during a prolonged outage.

How to Store and Maintain a Portable Power Station for Emergencies

Proper storage and periodic checks help ensure your power station is ready when an outage occurs. Before storm season or extended storage, review the following points:

• Maintain the recommended battery level: Follow the manufacturer’s guidance for storage charge levels and check the battery periodically during extended storage.
• Choose a suitable storage location: Keep the station within its recommended temperature range, away from excessive heat, moisture, and prolonged direct sunlight.
• Inspect cables and ports: Check charging cables, connectors, and outlets for visible damage before use.
• Test your backup setup: Connect the devices you expect to need during an outage and confirm that the station can power them as intended.
• Keep the station accessible and properly ventilated: Leave adequate clearance around ventilation openings and follow the manufacturer’s placement and operating instructions.

Conclusion

The best portable chargers for power outages depend on your household’s needs and how much portability you value. A compact power bank may be all you need to keep your phone charged, while a high-capacity portable power station can support a wider range of devices during a blackout.

Choosing the right option helps you stay connected and keep essential equipment available when the power goes out.

FAQs

Is an Anker SOLIX S5000 overkill if I only need to charge phones during power outages?

For the sole purpose of charging a mobile phone, its capacity is arguably more than enough. If you only need to charge your phone for short periods, carrying around a few standard USB power banks might be more convenient. However, the Anker SOLIX S5000 is even more powerful: with a battery capacity of 5024Wh and a rated output of 4500W, it is a highly practical choice if you also need to power compatible laptops, networking equipment, lighting, or household appliances.

What size portable charger do I need to keep four phones, two laptops, and a Wi-Fi router working during a two-day outage?

A portable power station with around 2kWh of battery capacity is a reasonable starting point for this setup. For example, four phones using 15Wh each, two laptops drawing an average of 50W for four hours each, and a 10W router running continuously would consume about 700Wh per day before losses. For a two-day outage, that is roughly 1.4kWh before conversion losses and extra capacity for unexpected use. Also, check that the station can supply enough output power for all devices.

How long would a 5 kWh power station last if I charge laptops and phones and keep a router on all day, including standby losses?

Assume two laptops use 400Wh each per day, four phones use 60Wh combined, and a 10W router runs continuously. Total device consumption is about 1.1kWh per day. At an assumed 85% AC conversion efficiency, the battery must supply about 1.29kWh per day for these loads. A 10W inverter standby draw adds another 0.24kWh per day, bringing total battery consumption to approximately 1.53kWh daily. A nominal 5kWh battery would therefore last about 3.3 days under these assumptions, before allowing for additional reserve or differences in usable capacity.

Can I charge my laptop directly from the Anker SOLIX S5000’s USB-C ports, and which port supports my laptop’s required wattage?

Yes, if your laptop supports USB-C Power Delivery (PD) and the port provides enough power. The Anker SOLIX S5000 has one USB-C port rated for up to 100W and a second USB-C port rated for up to 15W. Most laptops that require more than 15W should use the 100W port, provided it meets the laptop’s charging requirements. If your laptop needs more than 100W, use its compatible AC power adapter with the S5000’s AC outlet instead.

Can I charge multiple devices from the Anker SOLIX S5000 at once without shared USB power limits slowing them down?

The Anker SOLIX S5000 can charge multiple devices simultaneously, but charging speeds depend on the port ratings and shared power limits. It has one USB-A port rated at up to 12W, one USB-C port rated at up to 15W, and another USB-C port rated at up to 100W. The USB-A and 15W USB-C ports share a combined 18W output limit, while the 100W USB-C port can charge compatible laptops that support the required wattage. For the best results, match each device to a suitable port and account for shared output when charging several devices at once.

What should I check before relying on a large portable charger to keep my home office online when the power fails?

List the equipment you need to run, such as a laptop, monitor, router, and modem, and estimate their total energy use over the expected outage. For example, equipment drawing an average of 150W over an eight-hour workday would consume 1.2kWh before losses. Check that the station can support the combined running load and provide enough usable capacity for the expected outage.

Which portable charging setup lets me keep communications running and also power a refrigerator during an outage?

A high-capacity portable power station can keep your refrigerator, Wi-Fi router, and phones running from one backup source, provided its output and usable capacity meet their combined needs. The Anker SOLIX S5000 is one option to consider, with a 5,024Wh battery and 4,500W rated output. Check your refrigerator’s startup wattage and estimate its energy use over the outage to determine how long the system can support your essential devices. For outages lasting several days, consider how you’ll recharge the station to extend runtime.

How much solar charging would I need to replenish a family’s phones, laptops, and home internet each day?

Add the daily energy use of phones, laptops, and networking equipment in watt-hours (Wh). Divide that total by your location’s peak-sun hours, then allow for weather, panel orientation, and charging losses.

For example, four phones using 15Wh each, two laptops drawing 50W for four hours each, and a 10W Wi-Fi router running continuously consume about 700Wh per day. With four peak-sun hours, 700Wh ÷ 4 = 175W of solar input before losses. Allowing for charging losses and variable sunlight, a 250–300W solar array is a reasonable starting estimate for a typical sunny day. Check your power station’s maximum solar input before choosing panels, since additional panel capacity may not increase charging speed beyond that limit.