Power Station Chart

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EcoFlow RIVER 3 Plus Smart Extra Battery (EB300)

286 Wh that works with 2 stations, reaching 572 Wh in the largest setup.

By the Power Station Chart team, from the maker's compatibility pages. Last reviewed October 31, 2026.

The RIVER 3 Plus Smart Extra Battery (EB300) in brief

Doubling a 286 Wh RIVER 3 Plus to 572 Wh takes exactly one of these, since EcoFlow supports connecting 1 extra battery. The EB300 stores 286 Wh in LFP cells, weighs 7.72 lb and is also listed for the RIVER 3 Plus Wireless, which has the same 286 Wh capacity as the wired model.

Stations it works with

Extra batteries are locked to generation and connector. How the rules work by brand.

Where these figures come from

4 documents