The EcoFlow STREAM 5000 5 kWh expansion battery is designed to stack directly under a STREAM AC 5000 base unit and add 5024 Wh of LFP (LiFePo4) storage to the tower. A single expansion doubles the base to 10 kWh, and two expansions per tower lift the total to 15 kWh. Because up to six STREAM AC 5000 towers can be combined per house, a fully expanded configuration reaches 90 kWh of storage. The expansion unit weighs 43 kg and shares the IP65 housing and 10-year warranty of the base battery.

• 5024 Wh of usable LFP storage per expansion module, no separate app or wiring needed.
• Stacks under the STREAM AC 5000 base without extra brackets or cables outside the tower.
• Adds up to 1800 W of nominal single-unit power to the tower's capabilities.
• Nominal voltage of 50 V with 40 A maximum charge and discharge current.
• IP65 rating and -20 °C to 55 °C operating range mirror the base battery for indoor or sheltered outdoor use.
• 10-year warranty aligned with the STREAM AC 5000 for coordinated service.

Key specs

• Chemistry: LiFePo4 (LFP)
• Capacity: 5024 Wh
• Nominal voltage: 50 V
• Max charge current: 40 A
• Max discharge current: 40 A
• Nominal power (single unit): 1800 W
• IP rating: IP65
• Weight: 43 kg
• Operating range: -20 °C to 55 °C
• Warranty: 10 years

Best suited to STREAM AC 5000 owners who need a bigger evening buffer, longer blackout autonomy or the ability to shift a full workday of PV surplus into off-peak hours. Two expansions per tower unlock a 15 kWh footprint that easily covers an evening of heavy household loads or several hours of high-power tools on a professional site.