When testing the EcoFlow DELTA 3 Classic, it quickly becomes clear which path EcoFlow is taking here. Instead of squeezing as many special functions as possible into the housing, the power station concentrates on what really counts. It offers 1,024 Wh capacity and 1,800 watts of continuous power in a format that doesn’t immediately look like heavy work. When camping, in the garden or as a backup at home, you often don’t need a huge technology package weighing 20 kilos, but a device that is easy to carry, delivers a decent amount of power and doesn’t need to be plugged in for hours after use. So the question is whether this reduced concept works in practice.
Technical data
| Model | EcoFlow DELTA 3 Classic |
| Battery capacity | 1.024 Wh |
| Battery type | LiFePO4 |
| Cycle stability | approx. 4,000 cycles up to 80 % remaining capacity |
| Continuous power | 1.800 W |
| Peak power | 3.600 W |
| X-Boost | up to 2,400 W |
| AC outlets | 2 x Schuko |
| USB outputs | 1 x USB-A (18 W), 1 x USB-C (30 W), 1 x USB-C (100 W) |
| AC charging | up to 1,400 W, 0-80 % in 45 minutes according to the manufacturer |
| Solar input | 11-60 V, max. 15 A, up to 500 W |
| Car charging | up to 96 W |
| Switching time | 10 ms |
| Sound level | ≤30 dB at 600 W according to the manufacturer |
| Dimensions | 398 x 200 x 283 mm |
| weight | approx. 12 kg |
| App | EcoFlow app via Bluetooth and WLAN |
| Warranty period | up to 5 years |
| Price (RRP) | 599 € |
Design, workmanship and first impression
The first thing you notice when unpacking the DELTA 3 Classic is that it is surprisingly handy. 1 kWh capacity inevitably brings weight with it, but at around 12 kilos the station remains easy to carry. Thanks to the two firmly integrated handles, it is easy to carry to the barbecue area or into the garden.
Visually, EcoFlow remains true to its line: clean, tidy, nothing unnecessary. The fact that the front is not plastered with connections makes the appliance look almost discreet.
The display doesn’t have the latest high-end panel from the top series, but the tried and tested “older” look, but honestly? That doesn’t bother me for a second in use. It’s bright, it’s sharp and you can immediately see what’s going on. In the blazing sun, an easy-to-read standard display is much more important than any playful interface design anyway.
EcoFlow is also visibly restrained when it comes to the scope of delivery. The box contains only the bare essentials:
- the EcoFlow DELTA 3 Classic
- an AC charging cable
- paperwork
There was no reason to criticize the workmanship in the test. Nothing looks cheaply made, the gaps are also clean and the flap on the back for the inputs also makes a solid impression, although it looks a little delicate. The DELTA 3 Classic doesn’t feel like a slimmed-down cheap model, but rather like a deliberately simplified version that focuses on the essentials.
Connections: enough for many uses, but not for all
On the front of the DELTA 3 Classic, you can immediately see that EcoFlow has cut corners – but in the right places. Instead of a confusing flood of sockets, there is a clear setup: Two 230-volt sockets, one USB-A and two USB-C. Period.
That’s more than enough for most applications. The 100-watt USB-C port, which can also be used to charge a notebook quickly, is particularly important. In the test, the ports remained stable even under load.
The AC input and solar input are located at the rear. Up to 500 watts is a decent value in this size class and ensures that the DELTA 3 Classic is full again faster than you can say “camping breakfast” in good weather.
But beware! The “Classic” has its price: If you want to use classic 12-volt consumers such as a cool box with a car plug or camping gadgets with DC round plugs (DC5521), you will be disappointed here. EcoFlow has removed the entire DC section (except USB). So if your cooler does not have a Schuko plug or USB-C power, you will need an adapter or an additional power supply. This is the compromise you have to make for the compact and deliberately reduced concept.
Charging: Fast, faster, EcoFlow
The DELTA 3 Classic makes little fuss when charging. EcoFlow promises 0 to 80 percent in 45 minutes, and this matches reality pretty well in the test. After just under 55 minutes, the station was back to 100 percent. With up to 1,400 watts of charging power, this is not necessarily surprising, but it is still practical: between packing, coffee and the last-minute rush, the power station is usually ready for use again.
It is particularly practical that you retain control. If you don’t want to charge at full power all the time – and shouldn’t always do so to save battery power – you can simply reduce the charging power in the app. Whether 500 watts or the “whisper mode” with 200 watts, you decide for yourself whether you want to charge at full speed or quietly in the background.
The DELTA 3 Classic can also be used away from the socket. The solar input can take up to 500 watts, which is more than just a nice extra in this size class. With a suitable panel, the 1 kWh battery can be quickly recharged in good conditions. A full charge in around two hours is theoretically possible, but in practice, as always, this depends heavily on the weather, panel and orientation. There is also a 96 watt car charger for when you are on the move. It’s not quick, but it’s certainly useful as an emergency solution between two parking spaces.
The app is more than just by-catch
With many power stations, the app is ultimately just a nice gimmick that you open once and then forget about. With the DELTA 3 Classic, it is much more useful. The connection via Bluetooth or WLAN was stable in the test, and many important settings can be made directly on the smartphone without having to constantly bend down to the display.
In everyday life, it is the small options that are particularly useful: Switching off the beep, adjusting the display brightness or setting charging and discharging limits. These are exactly the kind of functions you actually use regularly.
Storm Guard is a real highlight. The app keeps an eye on the weather: if a storm is approaching, the DELTA 3 Classic – provided it is connected to the mains – charges up to 100% as a precaution. So you won’t suddenly find yourself in the dark just because you forgot to fill up the reserve for an emergency. The X-Boost can also be switched on here if you want to operate an appliance that actually draws more than 1,800 watts. In short: the app is not a “nice-to-have”, but the tool that makes the station really flexible.
Practical test: What the EcoFlow DELTA 3 Classic really does
You don’t have to be an engineer to roughly estimate the limits of the DELTA 3 Classic. A quick calculation shows that 1,024 Wh capacity with a 1,800 watt continuous load is used up after a good 34 minutes. In the test, it was therefore less the runtime that was exciting than the question of whether the station could cope with this load in a stable manner.
So we fired up the electric grill and grilled chicken minute steaks and zucchinis. The result was a precision landing: After just over 30 minutes, the battery was at 0%.
It was enough to get the food ready for a small round. But there’s not much left in reserve.
Many powerstations in this price range start to stink at such an extreme load (close to the maximum), the fans screech like a jet taking off or the device switches off for safety’s sake due to overheating. However, the DELTA 3 Classic performed remarkably well in the test. It delivered a stable 1,800 watts right up to the last percentage point without buckling.
However, anyone who thinks they can throw a garden party with a 1 kWh station has simply miscalculated. The DELTA 3 Classic is clearly designed for short, intensive use: boil water once, blow-dry your hair or grill a few steaks. More capacity is needed for longer operation under high load.
Efficiency, volume and temperature
The DELTA 3 Classic gets predictably warm under high load. During the grill test, the internal temperature rose to up to 52 °C according to the app. This was not critical, but the fans had to work audibly. Outside, the noise is usually drowned out by the ambient noise, but it is more noticeable in the camper or in a quiet home office. We tested at an outside temperature of around 17 °C, i.e. under rather favorable conditions.
Who the DELTA 3 Classic is intended for
The DELTA 3 Classic is particularly suitable for users who are looking for a portable power station with enough power for real consumers. It is suitable for the garden, weekend camping or as a mobile backup at home. It is less suitable for classic 12-volt setups or for long periods of use under high load.
Alternatives to the EcoFlow DELTA 3 Classic
If you are looking for a little more reserve within the EcoFlow portfolio, you should take a look at the EcoFlow DELTA 3 1500. It has a noticeable increase in capacity with 1,500 Wh, remains at 1,800 watts continuous power, but offers 13 outputs instead of the significantly reduced connection field of the Classic. It is also still fast when charging and should reach 80 percent in 60 minutes according to EcoFlow. This makes it the obvious choice for anyone who basically likes the DELTA 3 Classic but wants more runtime and more connections.
The Anker SOLIX C1000 is another option. With 1,056 Wh and 1,800 watts, it is very close to the EcoFlow, even charges to 80 percent in 43 minutes according to Anker, takes up to 600 watts of solar power and offers more ports. So if you’re in the same size category but are looking for a greater variety of connections and a somewhat broader equipment package, you’ll find a strong alternative here. The DELTA 3 Classic, on the other hand, is particularly interesting for users who are looking for a deliberately reduced, compact and pleasantly uncomplicated device.
Conclusion: Small enough to take with you, powerful enough for real tasks
With the EcoFlow DELTA 3 Classic, the focus is not on the longest possible list of features, but on clear practical benefits. 1,024 Wh, 1,800 watts and a fast charging speed come together in a format that is still easy to carry.
However, this does not work entirely without compromise. The selection of connections is noticeably slimmed down, and the lack of a 12-volt output could be a real catch depending on the area of application. Our barbecue test also clearly showed the limit: If you are constantly pulling high loads, the battery drains correspondingly quickly.
The bottom line is that the DELTA 3 Classic is particularly strong if you are looking for exactly this concept. It is compact, recharges quickly and is powerful enough for many typical jobs on the road or around the house. Not fully equipped, but sensibly reduced.
PROS
- Fast charging in just under an hour
- 1,800 watts of continuous power, even for more powerful devices
- pleasantly portable for this class at around 12 kg
- App with useful controls and practical additional functions
- Coherent overall package for the price called for
CONS
- No 12-volt output for classic camping and car consumers
- Scope of delivery very limited, e.g. without adapter for solar
- Connection selection reduced to the essentials
Conclusion
The EcoFlow DELTA 3 Classic doesn't claim to be able to do everything, but it is pretty much perfect for its intended purpose. It charges very quickly, delivers reliably even under load and is still handy enough for gardening, camping or mobile use around the house. The reduced selection of connections and the lack of a 12-volt output are clear limitations, no question. But if you can live with that, you get a pleasantly uncomplicated power station that is more convincing in practice than with a long list of features.
