300W Portable Power Stations: What 300 Watts Actually Runs
Off-grid power editor
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This guide is for people who have settled on a small power station and now have to choose between four units whose spec sheets look almost identical. We compared them on the numbers that actually separate this class: watt-hours per pound, refill rate converted to a common figure, port count and rated cycle life. We did not test these units ourselves, and each review states exactly what its recommendation rests on. What you get here is the arithmetic the listings leave out. We divide capacity by load to show runtime with the efficiency assumption stated, publish watt-hours per pound for every pick so a 1.9 times carrying spread inside one size class becomes visible, convert charge claims quoted to different end points into watt-hours per minute, and list plainly the appliances 300W will never run so you can rule this whole class out in thirty seconds if it is wrong for you.
What is the best 300W portable power station?
The Anker SOLIX C300 suits the widest range of buyers in this class. It pairs 288Wh with eight ports including three AC outlets, refills to 80% in 50 minutes and carries a five-year warranty. If the unit is going on your back, the Jackery Explorer 300 stores nearly the same energy in 7.1 lb instead of 9.1 lb.
Key takeaways
- 300W is the output rating and 300Wh is the pack; the first decides what will switch on, the second decides for how long
- Watt-hours per pound runs from 21.7 to 41.1 across this shortlist, so one unit makes you carry almost double the weight for the same energy
- At full rated output every unit in this class empties in between 42 and 50 minutes, which is the honest limit of what 300W is for
- Charge claims are quoted to different end points, so convert them to watt-hours per minute before calling one faster than another
- Nothing with a heating element or a compressor runs on 300W, and no surge rating closes a gap that large
Our picks at a glance
Every unit below wins a specific situation rather than a place in a ranking. Pick the row that matches how you will actually use it.
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Best for running several devices at once
Anker SOLIX C300
Camp tables, hotel rooms and home desks where three or four things need mains power at the same time and the unit is set down rather than carried far.
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Best for hiking and packing light
Jackery Explorer 300
Hiking, photography and one-bag travel where the unit is carried on a back or in one hand and the load is laptops, cameras, lights and phones.
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Best for refilling from a folding solar panel
EcoFlow RIVER 3
Multi-day camping and van trips where a folding panel goes out every morning and the pack is refilled daily rather than stretched across the whole trip.
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Best for daily cycling from a fixed base
Goal Zero Yeti 300
Base camps, work vans and homes where the unit stays put, gets cycled most days and has to be full again before the next trip out.
How they compare
Scroll the table sideways to see every column.
| Product | Where to buy | Award | Capacity | AC output | Weight | AC recharge time | Ports | Rated cycle life | Best for |
|---|---|---|---|---|---|---|---|---|---|
| Anker SOLIX C300 | Best for running several devices at once | 288Wh | 300W (600W surge) | 9.1 lb (4.1 kg) | 50 minutes to 80% | 8 total, 3 AC outlets | 3,000 cycles | Camp tables, hotel rooms and home desks where three or four things need mains power at the same time and the unit is set down rather than carried far. | |
| Jackery Explorer 300 | Best for hiking and packing light | 292Wh | 300W (600W peak surge) | 7.1 lb (3.2 kg) | -- | 6 total, 2 AC outlets, 1 USB-C PD 100W, 2 USB-A, 1 car port 120W | Over 4,000 cycles to 70% | Hiking, photography and one-bag travel where the unit is carried on a back or in one hand and the load is laptops, cameras, lights and phones. | |
| EcoFlow RIVER 3 | Best for refilling from a folding solar panel | 245Wh | 300W (600W X-Boost) | 7.8 lb (3.5 kg) | 1 hour to full | 9 total, 3 AC outlets | 3,000 cycles to 80% | Multi-day camping and van trips where a folding panel goes out every morning and the pack is refilled daily rather than stretched across the whole trip. | |
| Goal Zero Yeti 300 | Best for daily cycling from a fixed base | 297Wh | 350W (600W surge) | 13.7 lb (6.2 kg) | About 50 minutes from 0% to 100% in high-speed charging mode | -- | 4,000+ cycles | Base camps, work vans and homes where the unit stays put, gets cycled most days and has to be full again before the next trip out. |
The full reviews
Best for running several devices at once
Anker SOLIX C300
Anker
Three AC outlets and eight ports on a 288Wh pack make the C300 the pick when the problem is how many things need mains power rather than how much power any one of them draws. Its 50-minute refill to 80% works out at 4.6 watt-hours a minute, second here to the Goal Zero Yeti 300, and its five-year warranty is the longest term published on this page. You pay for that in carrying weight: 9.1 lb for 4Wh less capacity than the Jackery Explorer 300 holds in 7.1 lb.
What we like about the Anker SOLIX C300
- Eight ports including three AC outlets, so a laptop, a camera charger and a fan share the unit without a power strip
- 50 minutes to 80% is 4.6 watt-hours a minute, so a lunch stop at a socket puts most of the pack back
- Five-year warranty, three years longer than the Jackery Explorer 300 in this comparison
- The case is 6.46 by 6.34 in at the base and 9.45 in tall, so it stands in a car footwell instead of taking up seat width
Where it falls short for the Anker SOLIX C300
- 288Wh at an assumed 85% inverter efficiency gives about 6.1 hours on a 40W CPAP machine, which is short of an eight-hour night before the humidifier is switched on
- 31.6 watt-hours per pound against the Explorer 300's 41.1, so you carry 2.0 lb more for 4Wh less stored energy
- The 3,000-cycle rating is 1,000 below the Goal Zero Yeti 300 and the Explorer 300, about 8.2 years of daily cycling against 11.0
- The published 50 minutes stops at 80%, and no time to a full 288Wh appears in the specification, so the last fifth of the pack cannot be planned around
Key specifications
- Capacity
- 288Wh
- AC output
- 300W (600W surge)
- Ports
- 8 total, 3 AC outlets
- AC recharge time
- 50 minutes to 80%
- Rated cycle life
- 3,000 cycles
- Warranty
- 5 years
Most 300W units are bought to keep one or two things alive. The C300 is the one to buy when the count is higher than that, and the reason is the port panel rather than the battery.
Eight ports is the specification doing the work
Three AC outlets and eight ports total is the widest spread in this comparison, against nine ports but a smaller pack on the EcoFlow RIVER 3 and six ports with two AC outlets on the Jackery Explorer 300. It matters more than it sounds. A power strip plugged into a single outlet works, but the strip itself adds a plug and does nothing about the ceiling: three devices sharing 300W is three devices sharing 300W however they are connected.
So the useful question is what fits under that ceiling at once. A 60W laptop charger, a 25W camera charger and a 30W fan come to 115W, which leaves 185W spare. Add a 100W projector and there is still headroom. What does not fit is anything with a heating element, and that is a class limit rather than a C300 limit.
What 288Wh gives you
Allow 15% for inverter conversion loss on AC devices, a planning assumption rather than a measurement, and 288Wh delivers roughly 245Wh at the socket:
- A 60W laptop: about 4.1 hours
- The 115W three-device load above: about 2.1 hours
- A 40W CPAP machine: about 6.1 hours, which is not a full night
- Full 300W output: about 49 minutes, which is the honest ceiling of this whole class
On the DC path the inverter never runs, so phones do better. At roughly 90% efficiency the pack holds around 259Wh, or about a dozen full charges of a 20Wh phone battery.
The refill number, converted
Anker quotes 50 minutes to 80%. That is 230Wh restored in 50 minutes, or 4.6 watt-hours a minute. The RIVER 3’s hour to full works out at 4.1, and the Yeti 300 manages 5.9. Converting to a common rate is the only way to compare claims quoted to different end points, and on that measure the C300 sits second in this group.
For most buyers second is enough, because 4.6 watt-hours a minute means twenty minutes at a socket returns roughly 92Wh. Take 15% off for conversion loss and that is a little over an hour of laptop time bought back during a coffee.
Where it stops
Two places. The pack is small enough that a full night of CPAP is out of reach at 40W, and the cell rating of 3,000 cycles is the shortest here. At one full cycle a day that is about 8.2 years against 11.0 for the two units rated past 4,000. The five-year warranty softens that, and for weekend use neither figure will ever decide anything, because a unit cycled sixty times a year is limited by calendar age long before cycle count.
Buy it if several things need power at once. Buy the Explorer 300 if the unit is going on your back.
- Best for
- Camp tables, hotel rooms and home desks where three or four things need mains power at the same time and the unit is set down rather than carried far.
- Choose something else if
- You need a full night of medical equipment on one charge, or you are counting every pound into a rucksack, because both go to lighter picks here.
Best for hiking and packing light
Jackery Explorer 300
Jackery
Nothing else in this class stores as much energy per pound. 292Wh in 7.1 lb works out at 41.1 watt-hours a pound, nearly double the Goal Zero Yeti 300, and the 100W USB-C port covers most laptops without waking the inverter at all. The gaps are paperwork rather than performance: no published refill time and a two-year warranty.
What we like about the Jackery Explorer 300
- 41.1 watt-hours per pound, the best ratio here and 1.9 times the Goal Zero Yeti 300's 21.7
- 7.1 lb and roughly 369 cubic inches of case, which is rucksack space rather than boot space
- A 100W USB-C Power Delivery port runs most laptops on the DC path, so inverter loss never applies to the largest load
- Rated for over 4,000 cycles to 70%, about 11.0 years at one full cycle a day
- 292Wh is within 5Wh of the largest pack in this comparison despite being the lightest unit in it
Where it falls short for the Jackery Explorer 300
- No AC recharge time appears in the published specification, so it cannot be lined up against the Yeti 300's roughly 50 minutes to full or the C300's 50 minutes to 80%
- The published warranty is 2 years against 5 on the Anker SOLIX C300, despite a pack rated past 4,000 cycles
- Six ports with two AC outlets is the smallest count here, so a third mains device needs a strip and still shares the same 300W ceiling
- 292Wh covers about 6.2 hours of a 40W CPAP machine, so a full night needs a larger pack rather than a lighter one
Key specifications
- Capacity
- 292Wh
- AC output
- 300W (600W peak surge)
- Weight
- 7.1 lb (3.2 kg)
- Ports
- 6 total, 2 AC outlets, 1 USB-C PD 100W, 2 USB-A, 1 car port 120W
- Rated cycle life
- Over 4,000 cycles to 70%
- Warranty
- 2 year manufacturer
Weight is the only reason to buy in the 300W class rather than the 500Wh class, and the Explorer 300 is the unit that takes that argument furthest.
The ratio nobody prints on the box
Divide capacity by weight across this shortlist and the spread inside one size class is larger than the class label suggests:
- Jackery Explorer 300: 292Wh, 7.1 lb, 41.1Wh per pound
- Anker SOLIX C300: 288Wh, 9.1 lb, 31.6Wh per pound
- EcoFlow RIVER 3: 245Wh, 7.8 lb, 31.4Wh per pound
- Goal Zero Yeti 300: 297Wh, 13.7 lb, 21.7Wh per pound
The Explorer holds within 5Wh of the biggest pack here while weighing 6.6 lb less than it. That is not a small edge dressed up. It is 1.9 times the energy density of the heaviest unit on the page, and on a trail it is the difference between the power station coming with you and staying in the car.
Volume follows the same line. The published dimensions come to about 369 cubic inches against roughly 602 for the Yeti 300, so it occupies a side pocket rather than a footwell.
The USB-C port changes the arithmetic
Every runtime figure in this guide assumes 15% inverter conversion loss on AC devices, which is a planning assumption rather than a measurement. On AC, 292Wh delivers roughly 248Wh:
- A 60W laptop: about 4.1 hours
- A camera charger and a phone at 25W combined: about 9.9 hours
- A 40W CPAP machine: about 6.2 hours, short of a full night
The 100W USB-C Power Delivery port sidesteps that loss for the load most travellers actually run. On the DC path the pack behaves closer to 263Wh at an assumed 90%, which is roughly a quarter of an hour of extra laptop time bought purely by changing cable.
What the two-year warranty tells you
The cell rating and the warranty disagree here. Over 4,000 cycles to 70% is about 11.0 years of daily cycling, and the C300 backs a 3,000-cycle pack for five years while this one is covered for two. Neither figure is wrong, but if you are treating a power station as a decade-long purchase, that gap belongs in the decision.
Who should pick something else
Anyone whose unit lives in one place. If it sits under a desk or in a van, the 6.6 lb saving buys nothing and the Yeti 300 refills faster while the C300 runs more devices. Weight only counts when you are the one carrying it.
- Best for
- Hiking, photography and one-bag travel where the unit is carried on a back or in one hand and the load is laptops, cameras, lights and phones.
- Choose something else if
- You want a predictable refill schedule between uses, because no AC charge time is published for this model to plan around.
Best for refilling from a folding solar panel
EcoFlow RIVER 3
EcoFlow
The RIVER 3 is the only unit in this comparison that publishes a solar input figure, and at 110W that ceiling is met by one folding panel rather than an array. Treat it as a pack you top up every day instead of one you ration: 245Wh is the smallest reserve here, and the specification lists it as not expandable, so the runtime you buy is the runtime you keep.
What we like about the EcoFlow RIVER 3
- 110W maximum solar input, the only published solar ceiling in this comparison, so a single folding panel saturates it
- 245Wh is a shade over two hours of input at that rated 110W rate, which is one good afternoon of sun
- Nine ports including three AC outlets on a 7.8 lb case, the highest port count here
- One hour from empty to full on AC, so a single meal stop covers a complete refill
- Rated for 3,000 cycles to 80%, about 8.2 years at one full cycle a day
Where it falls short for the EcoFlow RIVER 3
- 245Wh is 52Wh below the Goal Zero Yeti 300, about 17% less stored energy, which costs roughly 45 minutes of laptop runtime
- Expandable is listed as No, so the only route to more runtime later is buying a second unit
- The 110W input ceiling means a 200W panel delivers no more than a 100W one, so the panel spend is capped by the power station
- One hour to full converts to 4.1 watt-hours a minute, the slowest of the three published refill claims on this page, against 5.9 for the Goal Zero Yeti 300
Key specifications
- Capacity
- 245Wh
- AC output
- 300W (600W X-Boost)
- Max solar input
- 110W
- Weight
- 7.8 lb (3.5 kg)
- Ports
- 9 total, 3 AC outlets
- Expandable
- No
Every unit in this class recharges from a wall socket. Only one of them tells you what it will accept from a panel, and that single published number is why the RIVER 3 is here.
What a 110W ceiling actually means
Divide 245Wh by 110W and a complete refill is about 2.2 hours of input at the rated rate. That figure is a best case: it ignores conversion loss inside the unit and assumes a panel is hitting its rating, which folding panels rarely do outside of a clear sky and a good angle. Derate a 100W panel to a realistic 70W and the same refill lands nearer 3.5 hours.
Either way the conclusion holds. One 100W folding panel and one good afternoon fills this unit from empty. That is a genuinely different way to own a power station from carrying it back to a socket every night.
The ceiling cuts both ways. Because the input caps at 110W, a 200W panel gives you nothing a 100W panel does not, so the panel decision is made for you and the money above 110W is wasted.
The smallest pack on the page
245Wh is the price of that portability. Against the other three:
- Goal Zero Yeti 300: 297Wh, 52Wh more, about 21% more energy than this pack holds
- Jackery Explorer 300: 292Wh, 47Wh more, about 19% more
- Anker SOLIX C300: 288Wh, 43Wh more, about 18% more
At an assumed 85% inverter efficiency, 245Wh delivers roughly 208Wh at the socket. That is about 3.5 hours on a 60W laptop against 4.2 hours for the Yeti 300, or about 5.2 hours on a 40W CPAP machine. At full 300W output it empties in about 42 minutes.
The word that matters more than any of those numbers is expandable, and the specification says No. There is no extra battery to add in a year. If the reserve turns out to be too small, the fix is another unit.
Nine ports on a light case
Three AC outlets and nine ports total on 7.8 lb is the widest port panel here relative to weight. On a camp table that means the phone, the light, the fan and the laptop all connect directly, which is exactly the pattern of small loads this pack is sized for.
Who it is for
The person who camps for four days rather than one night, carries a panel, and is happy to plan around a battery that gets refilled daily. Anyone who wants the biggest possible reserve in the smallest possible box should read the Explorer 300 section instead, where 47 more watt-hours arrive in a lighter case.
- Best for
- Multi-day camping and van trips where a folding panel goes out every morning and the pack is refilled daily rather than stretched across the whole trip.
- Choose something else if
- You want the largest reserve in this class or expect to add capacity later, because 245Wh is the floor here and the specification says it is fixed.
Best for daily cycling from a fixed base
Goal Zero Yeti 300
Goal Zero
The Yeti 300 restores its whole 297Wh in about 50 minutes, which is 5.9 watt-hours a minute and the quickest of the three refill times published on this page; the Jackery Explorer 300 publishes none at all. It also carries the highest continuous rating in the class at 350W and the largest pack. All of that is bolted to 13.7 lb, so it is the unit you buy when it will live in one place and get used hard rather than carried.
What we like about the Goal Zero Yeti 300
- About 50 minutes from empty to full in high-speed mode, 5.9 watt-hours a minute against 4.6 for the Anker SOLIX C300
- 350W continuous is the highest rating in this class, 50W of headroom over the other three units
- 297Wh is the largest pack here, roughly 4.2 hours on a 60W laptop at an assumed 85% inverter efficiency
- Rated for over 4,000 cycles, about 11.0 years at one full cycle a day, so it suits being cycled daily rather than seasonally
Where it falls short for the Goal Zero Yeti 300
- 13.7 lb is 6.6 lb more than the Jackery Explorer 300 for 5Wh more capacity, which is 21.7 watt-hours per pound against 41.1
- The case works out near 602 cubic inches, about 63% more volume than the Explorer 300, so it travels in a boot rather than a bag
- 350W continuous still rules out a kettle, a microwave and a hair dryer, so the extra headroom buys bigger fans and tools, not a new class of appliance
- No warranty term appears in the specification we compared, so a 13.7 lb unit meant to be cycled daily cannot be lined up against the Anker SOLIX C300's published five years or the Jackery Explorer 300's two
Key specifications
- Capacity
- 297Wh
- AC output
- 350W (600W surge)
- AC recharge time
- About 50 minutes from 0% to 100% in high-speed charging mode
- Rated cycle life
- 4,000+ cycles
- Weight
- 13.7 lb (6.2 kg)
- Dimensions
- 11.32 x 7.84 x 6.78 in
Recharge rate is the specification buyers skip, and it is the one the Yeti 300 wins outright. Everything else about this unit follows from a decision to prioritise throughput over portability.
Converting three different charge claims into one number
Manufacturers quote refill times to different end points, which makes them useless side by side until you convert them. Watt-hours per minute fixes that:
- Goal Zero Yeti 300: 297Wh in about 50 minutes, 5.9Wh per minute
- Anker SOLIX C300: 80% of 288Wh, so 230Wh in 50 minutes, 4.6Wh per minute
- EcoFlow RIVER 3: 245Wh in 60 minutes, 4.1Wh per minute
- Jackery Explorer 300: no charge time published, so it cannot be placed
The Yeti moves energy back into the pack about 45% faster than the RIVER 3. Over a week of daily use that is the difference between plugging in after dinner and plugging in before it, and for anyone cycling a unit every day it is worth more than the handful of extra watt-hours in the pack.
The 350W rating, in perspective
350W continuous is the highest here, and 50W of headroom is real: a 330W load runs on this and trips the other three. In practice that covers a larger fan, a bigger monitor, a corded drill on light duty or a projector with a laptop alongside it.
It does not change the category. A kettle draws around 1,500W, a hair dryer 1,200W and up, and a microwave around 1,000W. Those are roughly three to four times what this unit can supply, and a 600W surge rating does not close a gap that size. If your list includes any of them, the whole 300W class is the wrong shelf.
What 13.7 lb costs you
This is the trade, stated plainly. The Yeti holds 5Wh more than the Jackery Explorer 300 and weighs 6.6 lb more to do it. Per pound of carrying that is 21.7Wh against 41.1Wh, so you are paying almost double the weight for the same energy.
Case volume tells the same story: roughly 602 cubic inches against 369 for the Explorer. It fits a boot, a van cupboard or the space under a desk. It does not fit a rucksack in any comfortable sense.
Who should buy it
The unit that stays put. If it is charging tools between jobs, feeding a router and a laptop through a work day, or sitting on a shelf ready for the next weekend, the fast refill and the 4,000-cycle rating are exactly the specifications that matter and the weight never gets tested. If it is going more than a hundred yards from a vehicle, buy something lighter.
- Best for
- Base camps, work vans and homes where the unit stays put, gets cycled most days and has to be full again before the next trip out.
- Choose something else if
- You will carry the unit any real distance, because 21.7 watt-hours per pound is the worst energy-to-weight trade in this comparison.
How we researched this guide
Four units were compared using published manufacturer specifications only. None of them were tested by us. Every derived figure on this page, including watt-hours per pound, watt-hours per minute, case volume and device runtime, is arithmetic applied to those published numbers, and each review states which sources it relies on. Every recommendation also lists the drawbacks that would genuinely change the decision, including the specifications a manufacturer does not publish at all.
The full process is on our how we test portable power stations page, including what counts as hands-on use.
- Units evaluated
- 4
- Used hands-on
- 0
- Assessed from documentation and owner reports
- 4
Evaluation methods used: specification comparison, documentation and owner-report research
Which one should you buy?
Match your situation on the left to the recommendation on the right.
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Three or four things need mains power at the same time
Recommendation: Buy the Anker SOLIX C300 for its eight ports and three AC outlets
-
You will carry the unit in a rucksack or on a trail
Recommendation: Buy the Jackery Explorer 300 at 7.1 lb and 41.1 watt-hours per pound
-
You camp for several days and take a folding solar panel
Recommendation: Buy the EcoFlow RIVER 3, the only pick here publishing a solar ceiling at 110W
-
The unit stays in one place and gets cycled most days
Recommendation: Buy the Goal Zero Yeti 300 for its 5.9 watt-hours per minute refill and 4,000-plus cycle rating
-
Your list includes a kettle, a microwave or a full-size refrigerator
Recommendation: Buy nothing in this class and step up to a 1000W unit with a 1500W or larger inverter
Mistakes buyers make
- Reading the 300W output rating as 300 watt-hours of storage, which are different specifications measuring different things
- Buying the heaviest unit in the class for a use that involves carrying it, then leaving it in the car every trip
- Comparing a charge time quoted to 80% against one quoted to 100% and concluding the first unit is faster
- Assuming a 600W surge rating means a refrigerator compressor will start, when the start-up draw is several times higher again
- Sizing for a full night of CPAP on a pack that arithmetic says covers six hours, and finding out at three in the morning
- Spending on a 200W folding panel for a unit whose input ceiling is 110W, where the extra panel capacity is simply discarded
Our final recommendation
If you want one answer rather than a shortlist, this is the unit that suits the widest range of readers in this category.
Best for running several devices at once
Camp tables, hotel rooms and home desks where three or four things need mains power at the same time and the unit is set down rather than carried far.
Questions buyers ask
Can I run a 12V camping fridge or cooler from a 300W unit?
Yes, and this is the load the class handles best. A compressor cooler rated 45W does not draw 45W continuously; in warm weather it cycles, averaging perhaps 18W. On the DC path the C300's 288Wh leaves roughly 259Wh available at an assumed 90%, which works out at about 14 hours, so a bit over half a day. Run it from the car socket rather than through the inverter and you avoid the conversion loss.
Can I take a 300W power station on a plane?
No. Airlines cap loose lithium batteries at 100 watt-hours in the cabin, and up to 160Wh only with airline approval. Every unit on this page is between 245Wh and 297Wh, which is well past both limits, so none of them fly in checked or carry-on baggage. If you need power in the air, a 99Wh battery bank is the only category that qualifies.
How many times will one of these charge a phone?
A modern phone battery holds roughly 20 watt-hours. Charging over USB skips the inverter, so allow about 10% loss rather than 15%, which leaves around 259Wh usable from the C300's 288Wh pack. That is roughly a dozen full phone charges from empty to empty, before you count anything else plugged in.
Is 300W enough for camping?
For lights, phones, a laptop, a fan, a camera and a 12V cooler, comfortably yes. For an electric kettle, a portable induction hob, a hair dryer or a travel heater, no, and not by a small margin. Write down the wattage printed on each thing you plan to bring. If any single item exceeds 300W, this class is already ruled out.
Does the battery wear out if I only use it a few weekends a year?
Cycle ratings stop being the limit at that rate. Three thousand cycles at sixty cycles a year is fifty years, which no battery reaches, so calendar ageing decides the lifespan instead. Store it around half charge in a cool place rather than full or empty, and top it up every few months rather than leaving it flat for a season.
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