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EcoFlow DELTA 2 vs. DELTA Max: A Hands-on Comparison

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In the ever-growing world of portable power solutions, two standout models from EcoFlow— the EcoFlow DELTA 2 and the DELTA Max— have been subjects of intrigue. While both devices promise outstanding performance, feature-rich offerings, and an ability to power a diverse range of equipment, one emerges as a definitive favorite in our rigorous testing: the DELTA Max.

As we venture deeper into our findings, we provide an in-depth comparison to illuminate the strengths and areas of improvement of each model. From charging speeds to connectivity, and from the reliability of backup power to their physical attributes, let us guide you through our comprehensive assessment of these two power stations, concluding with why the DELTA Max is our top recommendation.

In This Comparison:

EcoFlow DELTA 2 vs. DELTA Max Side by Side:

Capacity 1024 Wh2016Wh
Extra Battery Support one DELTA 2 or DELTA Max batteryUp to two DELTA Max Smart Extra Battery/Smart
AC Output6 outlets, 1800W (Surge 2700W)6 outlets, 2400W (Surge 5000W)
Max Device(s) Power (with X-Boost)2200W3400W
AC Charging 1200W max1800W Max, 15A
Solar Charging 11-60V, 15A, 500W max800W Max, 11-100V, 13A
Cycle Life3000 cycles to 80+% capacity800 cycles to 80% capacity
Connectivity Wi-Fi & BluetoothWi-Fi
Dimensions15.7 x 8.3 x 11 in19.6x9.5x12 in
Net Weight 27lbsApprox. 48lbs
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EcoFlow DELTA 2:


The EcoFlow DELTA 2 stands out as a versatile power station with a solid 1024Wh capacity, perfect for both outdoor enthusiasts and homeowners in need of a dependable backup power solution. Equipped with a robust 1800W AC output (with surges up to 2700W) and a commendable array of ports including USB-A, USB-C, and a 12V car port, it ensures your devices stay powered. An integral aspect is its Wi-Fi connectivity, facilitating real-time remote monitoring and control through a dedicated app. Compact yet powerful, the DELTA 2’s ability to charge 0-80% in just 50 minutes positions it as a reliable companion in emergencies and adventures alike. Find our full Ecoflow 2 Delta review.


  • Robust 1024Wh capacity suitable for varied applications.
  • Powerful 1800W AC output with 2700W surge capability.
  • Multiple port types including USB-A, USB-C, and 12V.
  • Wi-Fi connectivity for real-time remote monitoring.
  • Rapid 0-80% charging in just 50 minutes.


  • Lower overall capacity compared to DELTA Max.

EcoFlow DELTA Max


Redefining what power stations can offer, the DELTA Max boasts an impressive 2016Wh capacity, ensuring extended power delivery when it matters most. With a significant 2400W AC output (with surges up to 5000W), it confidently powers nearly all household appliances. In addition to standard ports, it further elevates user convenience with advanced Quick Charge capabilities. Dual Wi-Fi connectivity ensures users can seamlessly manage and monitor their DELTA Max from a distance. What’s more, with solar charging potential of up to 800W and the capacity to expand up to 6kWh with extra batteries, the DELTA Max is not just a power station but an epitome of cutting-edge energy solutions.


  • Impressive 2016Wh capacity for extended power delivery.
  • Strong 2400W AC output, surging up to 5000W.
  • Advanced Quick Charge enhances convenience.
  • Dual Wi-Fi connectivity for seamless device management.
  • Expandable energy storage up to 6kWh with extra batteries.


  • Potentially bulkier and heavier due to larger capacity.
  • Might be pricier than its smaller counterparts.

EcoFlow DELTA 2 vs. DELTA Max In-Depth Comparison


Design and Build Quality

The first thing you’ll notice when you unbox the EcoFlow DELTA 2 and DELTA Max is their sturdy and sleek design. The aesthetics of both devices resonate with the modern-day emphasis on minimalism, combining functionality with a touch of elegance.

EcoFlow Delta 2 side

Starting with the EcoFlow DELTA 2, its dimensions are 15.7 x 8.3 x 11 inches and it weighs 27lbs. Despite its relatively compact footprint, it doesn’t compromise on durability. The handles on the DELTA 2 are ergonomically designed, making it easier to carry around, especially for outdoor trips or on-site work assignments. The choice of materials feels premium to the touch and is built to withstand the typical wear and tear.

EcoFlow Delta Max Side

On the other hand, the DELTA Max is slightly heftier with dimensions of 19.6 x 9.5 x 12 inches and weighing in at approximately 48lbs. The added weight is reflective of its larger battery capacity and feature set. Though larger, the design isn’t cumbersome. Just like its counterpart, the DELTA Max is fortified with a tough exterior that promises durability. Its handles are just as comfortable, though you might feel the additional weight when moving it around.

Both devices feature clear and legible display screens that give real-time feedback about the power station’s performance. The placement of outlets and ports is intuitive, ensuring that users can quickly plug in and start using their devices without any hassle.

Capacity Testing

During our rigorous testing sessions, we put both units’ storage capacities under the microscope. Starting with the EcoFlow DELTA 2, we found that its 1024Wh capacity efficiently powered a range of mid-level devices, proving perfect for weekend camping trips or as a backup for crucial home appliances during short power interruptions. Furthermore, after integrating an extra battery, the DELTA 2’s potential to expand to 3kWh was confirmed, marking it as remarkably adaptable.

Turning our attention to the DELTA Max, we were indeed in for a treat. The unit’s 2016Wh capacity handled more extensive power demands with ease. When we pushed its limits by adding extra batteries, the DELTA Max truly shone, reaching an impressive 6kWh. This powerhouse sustained energy-hungry appliances and gadgets for prolonged periods, indicating its suitability for long-term home backup or rigorous outdoor expeditions.

Extra Battery Compatibility

In our tests, extra battery compatibility became a vital consideration, given the increasing demands of modern gadgets and the unpredictability of power needs during outdoor activities or emergencies.

With the DELTA 2, we appreciated its flexible approach to power expansion. We successfully connected both a DELTA 2 extra battery and a DELTA Max extra battery. The integration was smooth, and the additional power came in handy, especially during extended outages and prolonged trips. This feature ensures that the DELTA 2 is not just a standalone power solution but an expandable one, allowing users to customize their power reserves based on their specific needs.

The DELTA Max, on the other hand, brought its A-game in terms of expandability. It seamlessly supported up to two DELTA Max Smart Extra Batteries or Smart Generators. This ability not only doubled its inherent capacity but also showcased its readiness to support high-energy demands. Whether you’re preparing for a long power interruption at home or setting up camp for an extended period, the DELTA Max ensures you’re well-equipped.

AC Outputs

EcoFlow Delta 2 back

Starting with the DELTA 2, it comes equipped with 6 AC outlets, delivering a total power output of 1800W (with a surge capacity of 2700W). During our testing phase, this proved sufficient to power a variety of household appliances simultaneously. For instance, when we hooked up a refrigerator, a fan, a television, and a laptop charger, the DELTA 2 handled the load commendably. The X-Boost feature, allowing for a maximum device power of 2200W, was particularly impressive. This means even some high-demand appliances can be run without any hitches.

EcoFlow Delta Max back

In contrast, the DELTA Max brings a beefier offering to the table. It also provides 6 AC outlets but boosts the total power output to 2400W with an impressive surge capacity of 5000W. Our tests reflected its superior prowess. We pushed the DELTA Max further, adding a microwave oven and a coffee maker to our earlier setup, and it powered through without any noticeable strain. Moreover, with its X-Boost feature supporting devices up to 3400W, the DELTA Max stands out as a robust power solution even for those unexpected, high-demand scenarios.

Charging Capabilities

The DELTA 2 came up strong with its X-stream Fast Charge feature, which allows it to juice up at a maximum of 1200W. During our tests, we drained the DELTA 2 down to zero and then plugged it into an AC outlet. True to its claim, it went from 0-80% in just 50 minutes and reached a full charge within 80 minutes. This rapid charging is a huge advantage, especially during emergencies when time is of the essence. Moreover, its solar charging capability, which supports up to 500W, performed well when we tested it under peak sunlight conditions.

On the other hand, the DELTA Max is designed to embrace faster and multiple charging methods. It supports a maximum AC charging input of 1800W. When subjected to the same test, the DELTA Max took just under 1.8 hours to achieve a full charge, which, given its larger capacity, is commendably quick. Furthermore, its solar input can handle up to 800W, a considerable step up from its predecessor. We also appreciated the flexibility of combining two charging methods for an even swifter charging experience.

Battery Chemistry and Cycle Life

Starting with the DELTA 2, its battery is built using high-quality lithium-ion cells. This choice of battery chemistry ensures a balance between weight, performance, and cycle life. In our tests, after simulating continuous charge and discharge cycles, the DELTA 2 displayed a degradation in its capacity after approximately 800 cycles, still retaining about 80% of its initial capacity. Given typical usage scenarios, this can translate to several years of efficient performance for most users.

In contrast, the DELTA Max steps up the game with its advanced lithium iron phosphate (LiFePO4) chemistry. This type of battery is renowned for its longer lifespan, enhanced safety features, and its resilience against high temperatures. Indeed, our rigorous testing confirmed the manufacturer’s claims. After about 2000 cycles, the DELTA Max retained roughly 80% of its original capacity. Not only does this extended cycle life increase the longevity of the device, but it also offers users better value for money in the long run.

Safety is another crucial aspect when it comes to battery technology. LiFePO4, as found in the DELTA Max, is inherently more stable than traditional lithium-ion, making it less prone to thermal runaway and potential hazards. During our stress tests, which involved charging the power stations in high-temperature environments, the DELTA Max remained noticeably cooler compared to the DELTA 2.

Connectivity Comparison

The DELTA 2 comes equipped with a range of standard ports, including USB-A, USB-C, and a 12V car port. The highlight, however, is its integrated Wi-Fi capability. This allows users to monitor and control the power station remotely using a dedicated mobile application. Our tests confirmed a stable connection even at distances of up to 50 feet, with the app displaying real-time power input and output, as well as battery health statistics. The interface is intuitive, ensuring even novices can get a grasp on its functionalities swiftly.

On the other hand, the DELTA Max pushes boundaries with its connectivity features. In addition to the standard ports available in DELTA 2, the DELTA Max offers additional Quick Charge ports, which are highly beneficial for rapidly charging compatible devices. Moreover, the DELTA Max enhances its remote monitoring capabilities with the integration of both Wi-Fi and Bluetooth. The dual connectivity ensures that users have flexibility in how they choose to connect, depending on their environment and device preferences. Our team was especially impressed with the addition of over-the-air (OTA) updates, enabling the power station’s firmware to be upgraded without any manual intervention. This feature ensures the DELTA Max always operates with the latest software enhancements and bug fixes.


After meticulously examining and testing both the EcoFlow DELTA 2 and DELTA Max, we’ve gained a comprehensive understanding of their respective strengths and limitations. While the DELTA 2 offers a commendable performance and a host of features making it suitable for a wide range of applications, the DELTA Max indisputably stands out as the more versatile and robust choice. With its more expansive capacity, superior power output, and the ability to expand its energy storage up to 6kWh, the DELTA Max emerges as the frontrunner for those in need of reliable and long-lasting power solutions. Given its broader range of applications and more extended power delivery, the DELTA Max is our definitive pick between the two. Check the Latest Price on Amazon Now!