A modern house with large glass windows under a stormy sky with lightning, featuring a compact, wheeled water storage tank labeled 'ECOFLOW' in the foreground.

Unmatched Output, Capacity & Solar Input

The No.1 Movable Whole-home Backup Battery

A two-story house at night with internal and exterior lighting, a garage with a car and shelving, and solar panels on the roof. Power lines are above, with trees in the background.

The No.1 Movable Whole-home Backup Battery

The EcoFlow DELTA Pro Ultra + Transfer Switch is an intelligent whole-house energy system for extended outages and daily use. Featuring a 20 ms automatic switchover, it ensures an uninterrupted power supply. With an expandable capacity of up to 30kWh, an output of up to 6900W, and 5 different ways to refuel, the system adapts to diverse power backup needs, ensuring you never sacrifice living convenience.

Get the highlights

Infographic showcasing a home backup and energy management system with features like 6-30 kWh capacity, easy installation, 6900W output, 5-year warranty, quick device protection, low noise level, energy management app, multiple charging options, and supporting home appliances.

5600W Solar Input

Flexible Solar Systems

An hour of solar for a day of backup. By leveraging High and Low-PV technologies, a single inverter sets new portable solar input standards with a 5.6kW input.

A miniature white house model with solar panels on the ground in front.

Flexible Solar Systems

With its flexible plug-and-play design and unrivalled solar input,EcoFlow DELTA Pro Ultra allows you to tailor your solution to fit your energy needs.

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Reliable for Whole-Home Backup

What's in the box?

Inverter Box

Image showing parts for EcoFlow portable power system: Delta Pro Ultra Inverter, portable stand, solar to low-PV port charging cable, AC charging cable, disassembly and assembly tool, and side mount casters.
Three black sections displaying a battery, a connection cable, and a safety guide for EcoFlow Delta Pro Ultra Battery.

Battery Box

1. X-Fusion technology ensures that all AC output sockets provide optimal output in terms of wattage and amp. In fast charging mode, the output will always be 6900W, no matter the input. Switch to fast charging for a continuous 6900W output. 2. If you connect the DELTA Pro Ultra to PV system circuits installed on or in buildings, according to NEC regulations, the system should include a rapid shutdown function to ensure operation safety and reduce shock hazards for emergency responders. If you wish to connect the DELTA Pro Ultra to PV system circuits, a pre-purchase consultation must be completed by a qualified electrician or installer. 3. If three or more battery packs are stacked, an EcoFlow Fixing Metal Tab is needed to hold them in position. EcoFlow Portable Stand allows you to stack one DELTA Pro Ultra Inverter and 5 Batteries. For permanent, long-term use, connect the inverter to three or more batteries and lock casters by putting on the brake so the batteries cannot move. 4. At an output voltage of 230V, the maximum power output DELTA Pro Ultra can achieve is 3600W. At an output voltage of 240V, the maximum power output can increase to 7200W.