Verdict
The VTOMAN FlashSpeed 2400 might not have the flair of some other consumer battery power stations, but it’s a rugged and well specified device capable of some heavy lifting around the home – and especially the garage. Its 1,408 watt hour capacity isn’t anything to write home about, but that’s a fair amount of storage at this price. That’s especially true when you consider this power station has a strong 2,400 watt output, is rather efficient, and has a good range of ports to cover most eventualities.
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Good value
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High power output
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Rapid charging
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Noisy
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Lacks some useful features
Key Features
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Review Price:
£700
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A simple power station with a high output
This battery power station stores enough power to get a fridge freezer through a day or more’s operation. It’s got a high output, too – enough to supply a modern household appliance like a toaster, or even some kettles.
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Good connectivity
The VTOMAN FlashSpeed 2400 has an impressive range of ports, and even comes with an adaptor suitable for jump-starting a car.
Introduction
The VTOMAN FlashSpeed 2400 is one of two new models in the Chinese brand’s range of portable battery power stations. Sitting near the top of the pile, it offers a strong 2400W output across its three mains sockets. It’s a bit less generous on storage, but its 1408Wh battery capacity should still be enough to run a fridge freezer for at least a day, or, in theory, keep a low-energy bulb lit for almost a week.
This power station isn’t perhaps as sophisticated as we’ve become used to from leading brands including Bluetti, EcoFlow or Anker. It’s a little larger and heavier than I’d expect for this capacity, and looks a bit more like something that belongs in the garage rather than a kitchen. That’s appropriate in a way, given that it has a special socket and lead designed to jump-start conventional car engines – potentially a great help if you have a rarely used or unreliable vehicle.
While this power station does without app control – and with it more sophisticated time-of-use storage behaviour – it does come with a great range of ports. It has no fewer than six USB sockets, three DC power outputs, and an additional car battery charging port. There’s also support for solar panels up to 600W, meaning you could easily take this power station off grid for extended periods.
Design and features
- Big and chunky
- Neat cable tidy on top
- No app control or advanced configuration
This is a big supply. Despite offering only about 1.4kWh of storage, it’s significantly bigger than the Anker SOLIX C2000 Gen 2 I’ve had on test, which has just over 2kWh. It also weighs about the same, which is odd given that batteries are usually the main source of weight in a portable power station. The VTOMAN FlashSpeed 2400 feels rugged, but there’s a small amount of creaking when you pick it up by its two substantial handles. Design-wise, I feel it’s a generation or two behind the best of the competition.
That’s not a major complaint, though, and elsewhere this is a well thought-through power supply. Its three mains outputs should be plenty to run a few devices in a power cut, although you may need to stagger power-hungry appliances so they don’t overload the available 2,400W total output. Also on the front panel you’ll find two USB-C ports rated for a fair 100W – not the 140W we see on many devices – along with four USB-A ports. Three of these top out at 15W, while the fourth can step things up to a heady 18W.
Typically for a battery power station, this one has a 12V, 10A cigarette-lighter style output. It’s less common to find a DC5521 connector – useful for running some low-power devices like routers – but this station has two of them. The final outputs are a connector suitable for an optional car battery charging cable, and a port designed for jump-starting a vehicle with a flat battery.
This power station’s inputs are also gathered onto the front panel. There’s a standard AC port, along with a DC5521 connector used by the supplied in-car charging cable. If you’re using solar panels, you’ll need to hook them up to the VTOMAN FlashSpeed 2400’s Anderson input. That’s a little unusual in a world where portable panels tend to use XT60 connectors, but the necessary adaptor is just a few pounds.
VTOMAN hasn’t been stingy when it comes to bundling cables. In addition to the lead for charging in a car you get two USB-C cables and a crocodile lead adaptor for use when jump-starting. This is great, but it’s also very short – you’ll practically need to balance the FlashSpeed 2400 on your wheel arch or engine block if you need to use the feature.
This device’s design might look workmanlike, but it has a couple of great features. On top there’s a lidded storage cubby perfectly sized to swallow all the supplied cables. My only complaint is that this isn’t latched, so you can’t keep it closed on the cables unless they’re tidy and neatly organised.
Hidden around the back there’s an impressively bright LED light strip, which offers three brightness levels, as well as strobe and SOS modes.
I’m not a huge fan of this power station’s screen, which is fairly basic. While it shows how much power is flowing in and out, it indicates recharging by flashing the second digit of the battery percentage display. That’s hard to read at a glance, especially if the digit happens to be off when you first look. There don’t appear to be any settings you can change from the front panel, beyond turning the AC, DC and USB ports on and off.
With that in mind it’s a shame that this power station doesn’t support VTOMAN’s app. You can’t configure its mains or solar charging priorities or speeds. You can’t set maximum or minimum charge levels, and there’s no support for time-of-use behaviour that could help you get the most from an off-peak tariff. The FlashSpeed 2400 simply charges when you plug it in, and switches to battery power when mains isn’t available.
Charging
- Charge from the mains, a vehicle, or optional solar panels
- Maximum 1,500W AC charging power
- Full recharge in a little over an hour
When mains power is available the VTOMAN FlashSpeed 2400 recharges at about 1500W. That’s quite fast for a supply with this capacity, and it means that, allowing for a little slowing down when the batteries are nearly full, it can fully recharge in about an hour – I timed 65 minutes from 0-100%.
That’s quite impressive, but it does come with a couple of drawbacks. First, within five to 10 minutes of starting to charge, this power station’s fans ramp up from a moderately loud medium speed to a hairdryer-rivalling maximum. It’s not something you’d want to share an office with, although again it wouldn’t be too frustrating in a garage or an outdoor space.
The other potential issue with defaulting to a fast recharge rate is that it could shorten the service life of the batteries – slow is usually slightly better on this count. VTOMAN says that the FlashSpeed 2400’s batteries will retain 80% of their capacity after 3,000 full charge/discharge cycles. That’s not bad, but it only backs it up with a 24-month warranty – several other brands offer five years.
I measured the amount of electricity consumed by the VTOMAN FlashSpeed 2400 during a full mains recharge. Assuming its 1408Wh batteries went from completely empty to 100% full, the 1571Wh it consumed translates to an efficiency of about 90%.
As with all other medium and heavy-duty power stations, in-car charging is something of a nice-to-have, rather than a practical necessity. At the maximum 120W available, you’d need to drive for 12 hours to get a full recharge. Still, it is good that VTOMAN provides the necessary cable – it’s the middle one below.
Performance
- Stable at maximum power
- Noisy on all but the lightest loads
- Strong efficiency
Connect up the VTOMAN FlashSpeed 2400 to a moderate AC load and the first thing you’ll notice is that its fans kick up quite a racket. There seem to be three speeds, with only the lower one particularly unobtrusive. In my testing – which took place in warm summer weather – it reached the loudest speed at anything much above 500W.
That aside, this power station is a solid performer. It could sustain anything up to its rated 2400W maximum AC output from fully charged to fully empty. It also didn’t complain when subjected to a 1500W charge, 2400W discharge, 1500W charge and 2000W discharge in rapid succession, staying unflustered and fairly cool throughout. Other than noise, my only criticism here is that the onboard display fell to 1% long before the batteries were exhausted: the supply typically lasted for a few more minutes even at the heaviest loads.
We always measure in watt hours (Wh) the amount of electricity delivered by power stations when discharging. When providing AC power, the VTOMAN FlashSpeed notched up a best of 1267Wh, which is 90% of its rated 1408Wh capacity. As I’d usually expect, this came roughly in the middle of its output range when supplying a load of 1,000W. Also predictable was that its poorest performance of 1129Wh (80%) came on a 200W load, and the next worst of 1215Wh (86%) was on my 2,400W maximum load test.
Unfortunately I wasn’t able to test the FlashSpeed 2400’s ability to jump-start a car – mine is an EV – but with the brand’s history in car charging I don’t doubt that the feature would work. I did hook this power station up to a 60W direct current (DC) load over a USB-C connection, and again it sustained this from fully charged to completely empty, delivering 1,285Wh (91.3%).
Taking all my charging and discharging figures, I worked out a round-trip efficiency of 80.6% for AC power, and 81.8% when using the DC output. Both compare well – I generally consider 80% the benchmark for strong round-trip efficiency, and I’ve tested plenty of good power supplies that couldn’t quite make it.
We try and indicate a power station’s value by dividing its purchase price by the amount of electricity it can store over the stated battery lifetime. For the VTOMAN FlashSpeed 2400 that works out as 18p per kWh: one of the lowest figures I’ve seen for a 3000-cycle device.
Should you buy it?
You need lots of output on a tight budget
The VTOMAN FlashSpeed 2400 is strong value, particularly if you need a high AC output more than you need lots of power storage. It’s a good addition to a garage, especially if you can pair it with a couple of solar panels on the roof.
You want sophistication or lots of storage
This power station’s 1,408Wh may not be enough to get big devices through a power cut. With no app or advanced config, it’s also not ideal if you need a sophisticated supply to charge off-peak and use in the day.
Final Thoughts
If you want a power supply with a high maximum output, but you either don’t need or can’t afford one with lots of storage, the VTOMAN FlashSpeed 2400 is an excellent choice. It’s one of the cheaper supplies you can buy with a 2400W output, even if its 1408Wh of stored power might not be enough to get a washing machine or tumble dryer through a full cycle in a power cut. While in some ways it feels basic, it is quite well specified – I certainly would have appreciated its built-in jump-starter back when I owned a seasonally used camper van.
This supply isn’t for everyone, however. Its noise and dated looks mean I wouldn’t want it in an office, bedroom or lounge, while without a time-of-use mode it wouldn’t help me store off-peak power to offset peak electricity use. With that in mind, it’s fine for limited home backup power on a budget, and ideal for an off-grid garage where you might need to run power tools, or recharge or jump-start a classic or rarely used vehicle.
How We Test
We test every power station we review thoroughly over an extended period of time. We use standard tests to compare features properly. We’ll always tell you what we find. We never, ever, accept money to review a product.
Find out more about how we test in our ethics policy.
- We test with a variety of devices to see how long the battery will last.
- We test different charging methods to see how quickly the battery can be topped up.
FAQs
Not quite. It’s able to jump-start conventional vehicles with a flat 12V battery. It can also slow-charge an empty car battery. If your EV has an emergency charging cable with a standard 13A plug you’ll be able to plug in and add a bit of charge, but it’ll probably only be enough for about four miles’ driving.
Yes, but unfortunately the FlashSpeed 2400 doesn’t support it. As such, you can’t change the default way it behaves.
Test Data
| VTOMAN FlashSpeed 2400 |
|---|
Full Specs
| VTOMAN FlashSpeed 2400 | |
|---|---|
| Manufacturer | – |
| Quiet Mark Accredited | No |
| Battery | 1408 Whr |
| Size (Dimensions) | 393 x 270 x 280 MM |
| Weight | 19 KG |
| ASIN | B0GJS5BQYJ |
| Release Date | 2026 |
| First Reviewed Date | 20/08/2026 |
| Battery type | Rechargeable |
| Battery technology | Lithium-ion |
| Battery size | AA |
| UK RRP | £700 |
| USA RRP | $799 |
| EU RRP | €699 |
| CA RRP | TBC |
| AUD RRP | TBC |
