The EcoFlow STREAM Parallel Cable is a short 55 cm link that couples two STREAM home batteries into a single, larger storage bank. Pairing a STREAM Ultra with a STREAM AC Pro, for instance, raises the AC output available to a connected appliance to 2300 W (1200 W from the primary unit plus 1100 W passed through the secondary) as long as the load is plugged into the AC1 or AC2 outlet on the STREAM. Charging speed also doubles to roughly 2100 W instead of 1050 W.

• 55 cm length keeps two stacked batteries neatly side by side without excess slack.
• Enables up to 2300 W total AC output through the AC1/AC2 sockets on the primary unit.
• Doubles grid charging from 1050 W to about 2100 W across the pair.
• Compatible with STREAM AC, Pro, AC Pro, Max, Ultra and Ultra X.
• Not compatible with STREAM 5000 or STREAM AC 5000, which use a different power path.
• Check that the branch circuit can supply the combined load before pairing two units.

Key specs

• Length: 55 cm
• Function: parallel link for STREAM home batteries
• Combined AC output on AC1/AC2: up to 2300 W
• Combined charging: up to 2100 W
• Compatibility: STREAM AC, Pro, AC Pro, Max, Ultra, Ultra X
• Not compatible with: STREAM 5000, STREAM AC 5000

Best suited to households already running one STREAM battery that want to double capacity and appliance headroom without buying a completely new system.