A power station with a UPS function sits between your wall outlet and your gear. When the grid drops, it switches to battery fast enough that your router, desktop or home office setup never notices. The catch is the word fast. Some power stations switch in under 10 milliseconds. Others take 20, 30 or even close to 40, and that gap decides whether your PC keeps running or reboots.
EcoFlow Delta 3 Plus
EcoFlow lists a UPS switchover under 10 ms on the Delta 3 Plus page, which is faster than the roughly 16 ms many desktop power supplies are built to ride through. It stores 1,024 Wh, puts out 1,800W (2,200W with X-Boost), and is listed at 30 dB under 600W. It carries a 5-year warranty and is expandable up to 5 kWh. It weighs about 28 lbs and is priced in the premium class.
Check price on Amazon →This guide lists the best power stations with UPS function we could verify, with the switchover time from the maker's page, one independent measurement, and runtime math for a router, a laptop and a desktop. It is a home-office and internet guide only, not a recommendation for any medical device.
For most home setups, get a small unit with a stated 10 ms switchover. The EcoFlow Delta 3 Plus (1,024 Wh, under 10 ms) and the Anker SOLIX C1000 Gen 2 (1,024 Wh, 10 ms) keep a router and PC up for hours. If you also want to ride through a longer outage with a fridge, the Jackery Explorer 2000 Plus (2,042.8 Wh) switched in 8.7 ms in an independent test. Check the UPS mode is switched on, because the feature is often off by default.
Quick comparison
| Product | Best for | Key detail | Price class | |
|---|---|---|---|---|
| Top pick EcoFlow Delta 3 Plus | Home office, router, PC | 1,024 Wh · 1,800W · under 10 ms UPS · 28 lbs · 5-year warranty | $$$ · Premium | Check price |
| Anker SOLIX C1000 Gen 2 | Lowest price, light weight | 1,024 Wh · 2,000W · 10 ms UPS · 24.9 lbs · 4,000 cycles to 80% | $$ · Mid-range | Check price |
| Jackery Explorer 2000 Plus | Longer outages, fridge plus internet | 2,042.8 Wh · 3,000W · under 20 ms UPS · 61.5 lbs | $$$ · Premium | Check price |
| Anker SOLIX F3800 Plus | Whole-house-scale backup with UPS mode | 3,840 Wh · 6,000W · 20 ms UPS (wall mode) · 136.7 lbs | $$$$ · High-end | Check price |
Our picks, one by one
EcoFlow Delta 3 PlusBest overall UPS pick
EcoFlow states under 10 ms UPS switchover, 1,800W continuous output (2,200W with X-Boost, 3,600W surge), and 1,024 Wh. Retail listings give 28 lbs and 4,000 cycles to 80% capacity. You can add battery modules to reach 5 kWh. Choose it over the Anker C1000 Gen 2 if you want expansion, a quieter fan (30 dB under 600W) and the 5-year warranty. Skip it if price per Wh is your priority.
Check price on Amazon →Anker SOLIX C1000 Gen 2Best value UPS
Anker lists a 10 ms UPS switchover, 1,024 Wh, 2,000W continuous with 3,000W peak, 24.9 lbs, and at least 80% capacity after 4,000 cycles. Its street price makes it the cheapest verified UPS option here. Pick it over the Delta 3 Plus if you only need a few hours of internet and a desk. Pick the Delta 3 Plus if you might want to add capacity later.
Check price on Amazon →Jackery Explorer 2000 PlusBest for longer outages with UPS
The unit stores 2,042.8 Wh with 3,000W continuous and 6,000W peak output, and the LFP cells hold at least 70% capacity after 4,000 cycles. In StorageReview's independent UPS test it switched in 8.7 ms, close to the 8.6 ms of the Eaton 5PX G2 they used as a reference UPS. Choose it over the 1,024 Wh units if you want to run a fridge as well. Skip it if all you need is a router for a few hours.
Check price on Amazon →Anker SOLIX F3800 PlusBest UPS mode at whole-house scale
Anker's page lists a 3,840 Wh base battery expandable to 53.8 kWh, 6,000W max output at 120V/240V, 3,000+ cycles and a 5-year warranty. UPS switchover is 20 ms from the wall. That is just over the 16 ms mark some desktops expect, so a very sensitive PC may still reboot. Pick it only if you also want a big backup battery. Pick a smaller 10 ms unit for the PC.
Check price on Amazon →What the UPS function does and what the milliseconds mean
A traditional UPS has an inverter that is always ready. A power station in UPS mode passes wall power to your devices and charges its own battery at the same time. When the grid fails, it flips to battery. The flip takes a few milliseconds (ms), and your gear has to ride through that gap.
Most desktop power supplies are built to bridge a short gap in power, often described as a hold-up time of about 16 ms. StorageReview, which tested several stations against an Eaton 5PX G2 reference UPS, notes that many desktops are designed with a 16 ms hold-up as a minimum, and that stations slower than that risk restarting a PC. Laptops, routers, modems and mini PCs run on external power bricks or batteries and are usually less picky.
Switchover times compared
This table sets the manufacturer's stated figure next to the one independent measurement we found:
| Station | Stated UPS switchover | Independently measured | Against a 16 ms desktop hold-up |
|---|---|---|---|
| EcoFlow Delta 3 Plus | under 10 ms (EcoFlow) | not measured in the review we read | Margin of 6 ms or more on paper |
| Anker SOLIX C1000 Gen 2 | 10 ms (Anker) | not measured in the review we read | Margin of 6 ms on paper |
| Jackery Explorer 2000 Plus | under 20 ms (listings) | 8.7 ms (StorageReview) | Passes in that measurement |
| Anker SOLIX F3800 Plus | 20 ms in wall-outlet mode (Anker) | not measured in the review we read | Over 16 ms on paper, so check your PC |
| Anker SOLIX F2000 (reference) | not checked | 27.4 ms (StorageReview) | Misses the 16 ms line |
| EcoFlow Delta 2 (reference) | not checked | 38.5 ms (StorageReview) | Misses the 16 ms line |
Rule: stated or measured switchover in ms compared against the 16 ms desktop hold-up reference. A lower number is better. Measured numbers can differ from the spec, as the two reference rows show.
The lesson is simple. Do not trust a UPS label alone. The EcoFlow Delta 2 and Anker SOLIX F2000 are good power stations that fell short as UPS devices in StorageReview's test, so a spec-sheet millisecond figure is worth looking up before you buy.
Runtime for a router, a laptop and a desktop
Runtime depends on the load, not the brand. Add up what you actually plug in, then divide the usable energy by that load. We assumed 90% inverter efficiency and loads of 22 W for router plus modem, 60 W for a mini PC or laptop with its monitor, and 200 W plus 22 W for a desktop and monitor.
| What you keep running | Total load | Anker C1000 Gen 2 (1,024 Wh) | Jackery 2000 Plus (2,042.8 Wh) | Anker F3800 Plus (3,840 Wh) |
|---|---|---|---|---|
| Router + modem | about 22 W | about 42 hours | about 84 hours | about 157 hours |
| Router + modem + mini PC or laptop | about 82 W | about 11 hours | about 22 hours | about 42 hours |
| Router + modem + desktop PC + monitor | about 222 W | about 4 hours | about 8 hours | about 16 hours |
Formula: hours = battery Wh × 0.90 ÷ load watts. Based on nominal capacity. The inverter's own idle draw and a battery that is not full will shorten these numbers, so treat them as the upper limit.
A router and modem alone can run for a day or more on even the small 1,024 Wh units. A full desktop is the heavy hitter: it burns through that same battery in around four hours. Put the router on the power station and let the PC sleep to stretch it.
How we chose
We built this guide from manufacturer product pages, one independent switchover measurement and retailer spec listings, from published specifications and third-party data. A unit needed a stated UPS or EPS switchover time of 20 ms or less, LFP (LiFePO4) cells for safety and cycle life, and a listing on Amazon.com. We excluded units where we could not find a stated millisecond figure. Where a number is a retailer listing rather than the maker's page (Delta 3 Plus weight and cycles, Jackery Explorer 2000 Plus specs), we say so and suggest you confirm it on the product page. The only independent measurements are StorageReview's, and we report them as theirs. Prices are rounded from current listings.
Pick a size by what you want to keep running
Use these decision rules before you look at price.
- Only the internet (router, modem, a phone charger): a 1,024 Wh unit covers well over a day. The Anker C1000 Gen 2 is the cheapest verified route.
- Internet plus a laptop-based workday: still a 1,024 Wh unit, good for roughly 11 hours at about 82 W in our table. Add a small portable solar panel if outages run long.
- Internet, a desktop and a refrigerator: step up to 2,042.8 Wh. A fridge averages 1 to 2 kWh a day, so a 1,024 Wh unit would run out in under a day with a desktop on top.
- Furnace fan, sump pump, fridge and internet: this is home backup, not a desk UPS. See the F3800 Plus row and our home battery backup hub.
One more number: output watts matter less for a router or laptop than for a desktop. Even a 1,800W unit is overkill for 82 W, so buy for the switchover time and the battery, not for the inverter.
Setup tips so the UPS mode really works
- Turn it on. Some stations only act as a UPS when you enable the mode in the app or on the unit. Check the manual.
- Keep it plugged in. UPS mode needs wall power flowing through the unit, so plug the station into the wall and your devices into the station.
- Test it. With the PC saved and backed up, pull the wall plug and see if the machine stays on. Do this once a quarter.
- Give it air. Pass-through charging warms the unit. Leave room around the vents.
- Do not daisy-chain. Put power strips with surge protection after the station, never another UPS.
- Use the app. Setting a charge limit (many apps allow 80-90%) can reduce stress on the cells when the unit stays plugged in for months.
Who should NOT buy this
- You need protection for a medical device. This guide does not cover that. Ask your doctor and the device maker what backup they recommend, and do not depend on a consumer power station for life-supporting equipment.
- You run a server, NAS or business-critical gear. A purpose-built UPS such as the Eaton used as a reference in StorageReview's test is the safer choice.
- Your PC is a high-power gaming rig. A 500 W+ draw drains small units fast, and a slow switchover may reboot it. A line-interactive UPS plus a separate power station for longer outages works better.
- You only lose power for seconds. A $60 to $120 basic UPS handles it without the weight or price.
For fridge-focused sizing, see our refrigerator power station guide, and for choosing a size, our sizing guide.
Our #1 pick: EcoFlow Delta 3 Plus
If you only read one line of this guide: this is the one we would buy.
Check price on Amazon →Frequently asked questions
Can a portable power station be used as a UPS?
Yes, if it has a UPS or EPS mode and a fast switchover. Look for 10 to 20 ms or better. Independent measurements ranged from 8.7 ms to 38.5 ms across popular models, so the stated figure matters.
What is a good UPS switchover time for a computer?
Under about 16 ms is the safest target for a desktop PC. Laptops, routers and modems tolerate more. Units listed at under 10 ms, such as the EcoFlow Delta 3 Plus and Anker SOLIX C1000 Gen 2, have the most margin.
Can I leave a power station plugged in all the time as a UPS?
Most UPS-capable models are designed to stay plugged in, and LFP cells handle that better than older chemistries. Check your manual, keep the vents clear and consider a charge limit in the app.
How long will a power station keep my WiFi router on?
A router and modem together use roughly 22 W, so a 1,024 Wh unit runs them for around 40 hours at 90% efficiency in our math. The inverter's idle draw lowers that, so plan on a day or more.
Is a power station better than a regular UPS?
For short blips and a single PC, a regular UPS is cheaper. A power station costs more but runs for hours, charges from solar and powers a fridge too. If you want both, use a small UPS at the desk and a power station for long outages.
Price classes are a rough guide; check the current price on Amazon. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.