DELTA Series

The DELTA series is EcoFlow’s high-end portable power station lineup. These models offer not only large battery capacities but also high output capabilities that can power most household appliances. With multiple input and output ports, as well as support for expansion batteries, DELTA series power stations are ideal for power users and even commercial applications.

Advantages of the DELTA Series

Supports Up to 4,000Wh of Capacity

One of the biggest differences between the DELTA series and the entry-level RIVER series is battery capacity.

While the RIVER series maxes out at 768Wh—less than 1,000Wh—the DELTA series starts at over 1,000Wh even in its most affordable models. The highest-capacity model, the DELTA 3 Pro, boasts an impressive 4,096Wh.

With this much capacity, you can use it for extended periods without worrying about battery life, even for power-intensive activities like car camping.

High Output Over 3,000W

Another key feature of the DELTA series is its high output capability. The RIVER series tops out at 800W, even in its higher-end models. In contrast, every DELTA model provides at least 1,500W of continuous output, with surge power exceeding 3,000W. This allows it to power devices like refrigerators and hair dryers with ease.

Expandable Battery System via Dedicated Ports

The latest DELTA models feature proprietary expansion ports, enabling users to connect optional expansion batteries. This allows you to extend the system’s capacity beyond the base unit’s limits.

For off-grid setups like RVs and garages, these expansion options provide a convenient way to increase battery capacity without taking up excessive space.

Disadvantages of the DELTA Series

Large and Heavy

The biggest downside of the DELTA series is its size and weight.

This is the trade-off for high power and large battery capacity. Even the cheapest DELTA 3 model weighs 27.6 lbs (12.5 kg)—more than 22 lbs (10 kg). While this is reasonable given that its battery capacity is four times that of the RIVER 3 (which weighs only 7.7 lbs (3.5 kg)), a unit weighing over 22 lbs (10 kg) is not something you can easily carry around. Instead, DELTA power stations are better suited for semi-permanent setups rather than frequent transport.