EcoFlow RIVER 2 Max 512Wh - 500W AC Output

EcoFlow RIVER 2 Max 512Wh is a portable power station built around a 512Wh battery and a 500W AC output. Its US configuration uses 120V power, weighs approximately 13.4 pounds, and reaches a full charge in 60 minutes.The manufacturer lists the core specifications for the model.

Capacity And Charging Speed

The EFR610 model designation identifies the RIVER 2 Max, separating it from the RIVER 2 Max 500, which has a different 499Wh capacity. The RIVER 2 Max stores 512Wh and accepts up to 660W through its US AC input.The US manual identifies the EFR610 model and its battery specifications.

EcoFlow rates AC charging from 0 to 100 percent at 60 minutes. Solar input reaches 220W across an 11V to 50V range, while USB-C input and output reaches 100W.

Ports And Physical Format

The station provides 120V pure sine wave AC output rated at 500W, with a 1,000W peak. Its listed dimensions are 10.6 by 10.2 by 7.7 inches, giving the unit a compact footprint for a vehicle, work area, or emergency-power shelf.

Output options include AC outlets, USB-A, USB-C, and DC connections. The USB-C port supports up to 100W, and the DC output is rated at 126W. Wi-Fi and Bluetooth support enable app control, while the LFP battery chemistry is rated for more than 3,000 cycles at 80 percent or more remaining capacity.

Price Warranty And Position

EcoFlow's US listing shows a price of $289.00 as of 09/22/2026, compared with a regular price of $299.00.Best Buy lists the same 512Wh US model at $329.00 in its product listing.

The RIVER 2 Max sits between smaller 256Wh portable stations and larger 768Wh models in the same series. Compared with the 256Wh RIVER 2, its 512Wh capacity is twice as large, while its 500W AC output remains below the 768Wh RIVER 2 Pro's higher-capacity position.

EcoFlow provides a five-year US warranty for the RIVER 2 Max. The package includes the power station, an AC charging cable, a car charging cable, a DC5521 connection cable, and a quick start guide.

Best Fit For Portable Backup

The RIVER 2 Max is suited to users who need 512Wh of storage, 500W continuous AC output, and multiple charging methods in a 13.4-pound enclosure. It can cover electronics and other loads within that output ceiling, but higher-wattage appliances exceed its continuous rating.