EcoFlow DELTA 2 Max Review: Impressive Off-Grid Performance

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  • Overall Design - 9/10
  • Ease of Use - 9/10
  • Battery & Charging - 9.5/10
  • Portability - 7.5/10


EcoFlow’s DELTA 2 Max stands out as a robust, versatile, and highly reliable portable power station. It delivers on its promise of long-lasting power, a high-capacity battery, and diverse outlet options. With a substantial 2,048Wh capacity, multiple outlets, and rapid charging capabilities, it caters to a broad range of power requirements, from regular household appliances to heavy-duty tools.


  • Incredibly fast AC charging
  • Improved battery chemistry than predecessor
  • Multiple diverse outlets
  • Robust solar charging capacity
  • Beautiful aesthetics


  • No physical covers for outlets
  • Expensive price-point
  • A bit heavy and bulky

As technology evolves and the world becomes more dependent on electricity, the need for reliable, portable power solutions becomes increasingly critical. Stepping up to this challenge is the EcoFlow DELTA 2 Max, a cutting-edge portable power station with a plethora of innovative features and impressive power output.

We recently tested it and found it to be an incredibly capable device with an array of features that make it ideal for a multitude of instances where you need access to reliable electricity. Read on to learn more about our experience with the DELTA 2 Max.

What’s in the Box

The unboxing process reveals a comprehensive package that immediately demonstrates the device’s promise of functionality. Included in the box is the ‎12.2 x 9.7 x 20-inch unit itself. Compact yet sturdy, it’s housed in a black and grey casing.

EcoFlow DELTA 2 Max unboxing

In addition to the power station, you’ll find an AC charging cable for wall socket charging, a car charging cable for on-the-go charging, and a DC5521 to DC5525 cable. An easy-to-understand user manual is also included, along with a warranty card for the manufacturer’s five-year warranty – a sign that EcoFlow is confident in the quality and longevity of its product.

First Impressions

Our initial interaction with the EcoFlow DELTA 2 MAX is one of respect for its compact size and subtle yet robust design. The power station feels solid and well-constructed, while its modern aesthetics ensure it wouldn’t look out of place in any contemporary setting. It’s also relatively light, weighing around 50 pounds – about normal for a power station of this capacity. As a result, you get considerable portability without compromising power output. While you wouldn’t want to lug it around on a regular basis, the built-in handles make it easy to do so.


The first impressive specification is the unit’s wattage. With a battery capacity of 2,048 Watt-hours, an AC output wattage of 1,000 Watts, and an impressive maximum of 2,400W (extendable up to 3,400W with X-Boost mode), the DELTA 2 Max is clearly not lightweight in terms of power provision.

Moreover, its multiple ports are neatly arranged and clearly labeled, indicating a thoughtful design that ensures user-friendly operation. There are 15 outlets available, a generous amount designed to cater to a variety of appliances and devices. From laptops and home appliances to heavy-duty tools, this power station looks poised to handle a wide array of power demands.


Safety also seems to be a priority, with it boasting features such as quiet operation at only 30 dB and a battery management system that monitors voltage, current, and temperature to ensure stable and secure operation. Not only that, but the power station case is fire-resistant. It’s constructed of UL94-5VA material, which serves to provide several protective layers for optimal safety and longevity.


The inclusion of LFP battery technology also hints at durability and long-lasting performance, with EcoFlow promising up to 10 years of service life. Our first impressions suggest a well-thought-out, versatile, and powerful portable power station. However, its true performance will be revealed in its operation and ability to deliver on its impressive list of features and specifications. Stay tuned for our in-depth exploration of these features – and how they performed during our rigorous testing – in the following sections.

Power Output

With the previously mentioned power output of 2,400W, the station can comfortably power a host of electronic devices simultaneously. And if you’re using high-demand appliances, simply take advantage of the X-Boost mode. Its performance surpasses many similar units in its range. The testing phase allowed us to power a variety of heavy-duty appliances, such as a portable grill and a power drill, proving the station’s substantial power delivery and versatility.

EcoFlow-DELTA-2-Max-power output

This output is backed up by an impressive battery capacity of 2,048Wh, enabling it to power multiple common household appliances during blackouts. From TVs and WiFi routers to refrigerators and even washing machines, the DELTA 2 Max was able to handle these tasks comfortably in our tests. In outdoor settings such as camping trips, the device demonstrated similar efficiency. It had no issues managing the power of common camping appliances. And yet it’s was perfectly capable of charging your everyday tech, like laptops and tablets.

However, the unit’s fan can produce some noise when operating at full capacity, which was noticeable during our tests of high-powered appliances. It measures around 42 dB, which isn’t the quietest in its class, but compared to its gas-powered counterparts, this noise output is negligible. Given its performance elsewhere, it’s hard to knock it for this. Keep in mind, too, that it gets quieter when you charge fewer devices.

Outlet Options

It comes equipped with multiple outlets to meet all your power needs. We noted six AC outlets, which are typical household outlets. That in itself would be sufficient for many consumers. EcoFlow didn’t stop there. You also get four USB-A ports, two of which are fast-charging ports, making it an excellent option for rapidly powering up your mobile devices. On top of that, it boasts two USB-C ports for faster charging and two DC5521 outlets, which are suitable for most 12V tech. There’s also a 12V cigarette lighter charger for your vehicle.


We found that these diverse outlets provided us with numerous possibilities for charging and running various devices. Admittedly, we would have liked it if EcoFlow included protective covers on all the ports featured here. Their noticeable absence doesn’t provide the peace of mind one expects from a portable power station of this caliber. Not having such covers leaves the ports vulnerable to everything from moisture to dirt.


Design-wise, AC & DC outlets are at the rear, while the USB outlets are conveniently located on the front. Unlike some other portable power stations we’ve seen, it lacks a wireless charging pad on top. But as our tests showed, the absence of wireless charging does not hamper performance and actually leaves the top of the unit clear. In doing so, it leaves space for a spare table or even as a temporary seat.

Battery Life and Charging Capabilities

The duration of battery life between charges varies significantly based on the types of devices and duration of use. However, the unit’s high-capacity battery of 2,048Wh typically ensures it lasts for several days between charges under normal use conditions. High-power-draw appliances, such as heating or cooling devices, may deplete the battery at a quicker rate.

A standout feature that’s worth mentioning is the upgraded lithium iron phosphate (LFP) battery chemistry. This modification equips the power station with an impressive lifespan, maintaining up to 80% of its capacity even after 3,000 complete charge cycles. This essentially translates to around a decade of daily usage before the battery capacity diminishes to 80%, a longevity that far surpasses similar products on the market.

Solar Performance

The DELTA 2 Max also distinguishes itself with its capacity to serve as a solar generator. If you opt to purchase the 220W bifacial (two-sided) solar panel, your power station can harness the sun’s energy to recharge, taking advantage of both direct sunlight and reflected light. Despite the backside being 80% as efficient as the front, it significantly augments the overall wattage contributed.

EcoFlow-DELTA-2-Max-solar charging

The combination of solar charging with the unit’s robust battery capacity provides a reliable power solution for travel, camping, or during extended power outages. It’s an eco-friendly option, allowing you to meet some of your electrical needs without burning fossil fuels. What’s more, there’s an option that allows for further augmentation of power capacity, so up to two additional batteries can be purchased for this unit. Taking advantage of this increases its capacity from over 2,000Wh to a whopping 6,000Wh.

Charging Options and Speed

Various options exist for charging the DELTA 2 Max. These include using a conventional household receptacle, car charging through a 12V lighter cable, and, as mentioned, solar charging. The AC wall charging option, in particular, offers a rapid charging rate. It alone can reach 80% capacity from zero in about 1.1 hours. That’s mighty impressive and one more reason why this power station is such a worthy investment.

EcoFlow-DELTA-2-Max-ac charging

If you can access both an outlet and a suitable solar angle, you can charge your power station even faster by using both AC power and solar panels simultaneously. With the help of the companion app, you can automate charging schedules to take advantage of lower energy costs. Despite the fast charging speed, it remains relatively quiet during the process, owing to its well-regulated cooling fans. This adds to the overall user convenience, providing a reliable, efficient, and quiet power solution.

User Interface

The DELTA 2 Max boasts a highly intuitive user interface designed to maximize ease of use. You’re afforded a clear and easy-to-read screen, so you can effectively monitor vital metrics such as charging status, energy consumption, and remaining charge percentage. The display is clear, detailed, and straightforward in its presentation – features that are sure to appeal to newcomers and experienced consumers alike.

For more in-depth monitoring and control, the power station also offers an equally user-friendly app. That way, you’re afforded more detailed energy metrics at your fingertips, ensuring that you always have the most accurate information about your power station’s status.

ecoflow mobile app

Despite the high-tech capabilities, the display retains a touch of old-school charm. Its somewhat retro aesthetic doesn’t take away from its functionality. Quite the opposite, in fact. It adds a unique allure to the overall design of the power station. Alongside its robust range of ports, the simple yet effective user interface significantly enhances its usability and appeal.

Final Verdict

EcoFlow’s DELTA 2 Max stands out as a robust, versatile, and highly reliable portable power station. It delivers on its promise of long-lasting power, a high-capacity battery, and diverse outlet options.

With a substantial 2,048Wh capacity, multiple outlets, and rapid charging capabilities, it caters to a broad range of power requirements, from regular household appliances to heavy-duty tools. Its potential as a solar generator is a huge plus for eco-conscious users and outdoor enthusiasts alike. When you factor in its overall build quality, design, and safety features, this is sure to serve you well as a worthwhile investment.

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