Portable Power Station vs. UPS: How to Pick the Best Backup Power Option

There are all kinds of reasons you might want backup power: to keep your home safe during a storm, to charge electronics while camping, or to protect sensitive devices from power outages. 

Outside of gas-powered home generators, two of the most popular options are portable power stations and uninterruptible power supplies (commonly known as a UPS). Both are large batteries at their core, but they have different capabilities. A portable power supply might pack more power, but that comes at a price. A UPS, meanwhile, can be cheaper and more seamless but won't last quite as long due to continuous use. 

So which one is right for you? Here's a rundown of both technologies and expert advice to help you decide for yourself. 

What is a portable power station? 

A portable power station is basically a large battery that you can carry around and plug your devices into. 

Portability is the main feature here: They're light enough to move around your house and take on a camping trip, and come with lots of outlets built in, so you can connect appliances or gadgets.

"Because they're portable, you're not looking at a lot of [energy] storage," said Sequoya Cross, vice president of energy storage at Briggs and Stratton Energy Solutions.

They're ideal for powering laptops, phones or smaller appliances like a fan. That's why they're popular for RVs and campers, or as a small source of emergency power during a storm or blackout to keep the essentials running. Larger portable power stations can run a fridge for a couple of hours, but that's pushing toward the limits of their power.

Some portable power stations can also plug into portable solar panels, which allows you to keep the battery charged even if you're not connected to the grid.

Some portable power station models can also be used as an uninterruptible power supply. In this mode, you'd keep your electronics plugged all the time with the portable power station providing pass-through power, and the battery switches over in the event of a power outage, keeping your electronics running without a blip. Normally this process happens in milliseconds, with the Ecoflow River 3 switching over in 20 milliseconds and the River 3 Plus doing it even faster, in 10 milliseconds. 

Pros and cons of a portable power station

Pros

• Small and portable
• Many can connect to portable solar panels to charge 
• Versatile, with lots of onboard plugs and USB ports for output

Cons

• Limited in how much power it can store. Can't power your entire home during a long blackout 
• Expensive, running from hundreds to thousands of dollars

What is an uninterruptible power supply? 

An uninterruptible power supply is not all that different from a portable power station. At the end of the day, it's another battery storage device that you can plug into.

But a UPS is usually designed to be more stationary. A common type of UPS, which basically looks like a bulky power strip, is often used to power computer systems. Half the plugs might be labeled something like "Battery," and another half might say "Battery+Surge," as in the case of Cyberpower or APC systems. If it just says surge, it means there's no battery backup via that plug, while "battery+surge" means that it'll act as a surge protector with battery backup. 

In this setup, the UPS is plugged into a wall outlet, and the computer is then plugged into the battery/surge plug on the UPS. Most of the time, the UPS simply acts as a power strip to protect against surges, but during a power outage, the UPS automatically kicks on and uses its battery to keep your electronics running (hence, "uninterruptible.") for a period of time so that it can be safely shut down. 

These devices usually store a lot less power than a portable power station, and are more suited to brief power interruptions, not sustained blackouts, according to Cross. Aside from computer setups, UPS devices are often used to protect other sensitive electronics or medical devices that can't afford to lose power, even for a minute.

The difference between pure sine wave and simulated sine wave UPS

Not all UPS devices are created equal. Some are "pure sine wave," which refers to the waveform generated by the power supply. With sensitive electronics, "you're going to want to have something that is [pure] sine wave," Cross said, because that translates to a smoother, less "interrupted" supply of power.

Other devices are "simulated sine wave," which means they produce a more "jagged" power waveform, Cross said, which can cause power fluctuations and, in turn, damage to sensitive electronics.

"The cleaner [the waveform] is, the better it is for electronics," Cross said. She noted that pure sine wave UPS units were traditionally more expensive, but that it has come down in price over the years and is now a more common option.

Pros and cons of a UPS 

Pros

• Some can be smaller than portable power stations
• A UPS is generally less expensive than a portable power station
• They can switch on instantly in an outage and discharge backup power quickly

Cons

• The battery duration of a UPS is much shorter than a portable power station
• A UPS is more stationary and can't be moved around as easily

Portable power station vs. UPS: Which one should you choose? 

Deciding between a portable power station and a UPS really depends on what you want to use it for. 

People who are looking for backup power they can take on the go, for camping or similar activities, are more likely going to prefer a portable power station. "A portable power station does afford a lot of flexibility, especially with the addition of solar," Cross said. Companies like Jackery allow you to pair power stations like the Jackery Solar Generator 2000 Pro with up to six SolarSaga 200W solar panels. 

But folks who are trying to protect specific electronics in their home, like an expensive computer or important medical device, might benefit more from a stationary but reliable UPS that makes use of pure sine wave. 

Here's a more detailed breakdown of the options.

Functionality

Both a portable power station and a UPS will provide battery power to back up electronics. In that sense, their functionality is very similar.

A UPS, however, is designed to kick on automatically (without interruption) to prevent damage during a power outage or surge. While some portable power stations also have this capability, it's not their main purpose. 

Power stations are intended more to be the occasional backup during outages, so you're unlikely to use them constantly. However, unlike a UPS that can usually only be charged with AC input, a portable power station can often also be paired with solar panels so you can still top it up off-grid. 

A UPS can also come with power management software like CyberPower PowerPanel, which lets you check its status, manage automatic and scheduled shutdowns and notifies you about power events. 

Power capacity

Portable power stations generally have more power capacity than a UPS, with larger power stations like the Jackery Explorer 2000 Plus having a 2,042.8 watt-hour capacity and can keep devices like kitchen appliances, electronics, and TVs running for hours. By contrast, a UPS like the Cyberpower CP1500PFCLCD, which supports 1,000 watts (1,500 volt-ampere) has a runtime of 10 minutes at half load and 2.5 minutes at full load.

A portable power station makes more sense if it needs to power electronics for hours or days at a time. Some models also let you connect and stack additional batteries for even more runtime. 

Because a UPS is going to be a lot smaller, it's designed for brief power interruptions, not prolonged battery power. The battery also wears out over time due to power cycling during constant use. On the plus side, the lead acid battery on a UPS is usually user-replaceable, which isn't always the case with a portable power station.

Portability

It's in the name: A portable power station is a lot more mobile than a UPS. 

Portable power stations can be moved around your house, or even taken on the road. A UPS, while you could change its location from time to time, is meant to be a more permanent fixture. A UPS often doesn't have a handle or wheels, and it's usually hooked up to devices like a desktop PC computer, which is intended to be stationary.

Price

UPS units are generally more affordable than portable power stations. A UPS can cost from $50 to $250, while portable power stations are at least a few hundred dollars and often run into the thousands, depending on size, capacity and features. 

Frequently Asked Questions

Read more: CNET experts have put the best portable power stations to the test to help you choose what works best for your needs. If you need something portable while being off grid, solar generators can also be a good option.