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EcoFlow

EcoFlow DELTA Pro Ultra Whole-Home Backup (Inverter + 6kWh Battery)

A modular whole-home backup system pairing a 7,200W 120V/240V inverter with a 6,144Wh LFP battery, expandable to 30kWh per inverter, with up to 5,600W of solar input; listed by EcoFlow as UL 9540 certificated.

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EcoFlow DELTA Pro Ultra with one inverter stacked on one 6kWh battery, viewed from the front left on its wheeled stand; a second matching starter system stands behind it.
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Photo: EcoFlow

Key facts

Capacity
6,144Wh per battery (102.4V, 60Ah), LFP
Expansion
Up to 30kWh per inverter (5 batteries); up to 90kWh and 21.6kW with 3 inverters on EcoFlow's Smart Home Panel 2
AC output
Pure sine, 7,200W total, 120V/240V 60Hz; surge 10.8kW for 10 seconds (LRA 120A)
AC outlets
Backup-UPS outlets: 2 x 120V 20A and 1 x 120V/240V 30A; online-UPS outlets: 2 x 120V 20A and 1 x 120V 30A (EcoFlow counts 11 outlets on the inverter, USB included)
DC outputs
2 x USB-C 100W; 2 x USB-A 12W; 12.6V 30A (378W max)
AC charging
100-120V 15A or 200-240V 12.5A; EcoFlow states up to 6,200W fastest charging with one battery (about 92 minutes)
Solar input
5,600W total over 2 ports: high-PV 80-450V 15A 4,000W max; low-PV 30-150V 15A 1,600W max

Which version should you buy?

This page covers: Original DELTA Pro Ultra: one inverter and one 6,144Wh battery (DPU-US).

  • DELTA Pro Ultra, inverter and one battery

    This page

    Model: DPU-US

    What differs
    Includes one inverter and one 6,144Wh battery, with 7,200W continuous output.
    Best for
    Buyers starting a complete original Ultra system.
    Check price on Amazon

  • DELTA Pro Ultra, inverter and two batteries

    Model: DELTA Pro Ultra

    What differs
    Contains two batteries instead of one; the maker calls it the 12kWh kit.
    Best for
    Buyers needing longer runtime from the same inverter.

  • DELTA Pro Ultra inverter alone

    Model: DELTA Pro Ultra Inverter

    What differs
    Contains the inverter without a battery; it must be paired with an Ultra battery.
    Best for
    Owners adding an inverter to compatible batteries.

  • DELTA Pro Ultra battery alone

    Model: DELTA Pro Ultra Series Smart Extra Battery

    What differs
    Adds a 6,144Wh battery without an inverter. The current series battery supports Ultra and Ultra X inverters.
    Best for
    Compatible system owners adding storage.

  • DELTA Pro Ultra with Smart Home Panel 2

    Model: DELTA Pro Ultra + Smart Home Panel 2

    What differs
    Adds the home circuit panel for automatic backup; installation is required.
    Best for
    Homeowners wanting installed circuit control.

  • DELTA Pro Ultra with two 400W panels

    Model: DELTA Pro Ultra

    What differs
    Adds two 400W portable solar panels.
    Best for
    Buyers wanting a portable solar kit.

  • DELTA Pro Ultra X starter set

    Model: DELTA Pro Ultra X

    What differs
    The newer system pairs a 12kW inverter with two batteries for the maker’s 12kWh starter configuration.
    Best for
    Buyers needing more output than the original Ultra.

Watch out

  • A complete starter system needs an inverter and battery; inverter-only and battery-only listings are components.
  • The 12kWh original Ultra kit has two batteries, rather than one larger battery.
  • Ultra X is a different inverter generation. Its only candidate, B0G29PC9BL, is inverter-only and does not match the complete Ultra X starter set.
  • Choose a listing explicitly naming Smart Home Panel 2 when that panel is required.
  • Check solar-panel count; a listing mentioning a 400W panel does not establish the official two-panel kit.

Why people pick it

  • 7,200W continuous at 120V/240V; EcoFlow says one unit can run a 3-ton central AC
  • Up to 5,600W of solar, including a high-voltage input that works with many rooftop arrays
  • Expands to 30kWh per inverter and 90kWh in a three-inverter system
  • Listed by EcoFlow as UL 9540 certificated
  • Online UPS mode (0 ms) on its online-UPS outlets

Know before you buy

  • Two heavy pieces (70 lb inverter, 111.8 lb battery)
  • Not compatible with third-party inverters or DELTA Pro 3 batteries
  • Panel connection and rooftop-solar hookups need a licensed electrician (NEC rapid-shutdown rules apply to building-mounted PV)
  • Charging at 240V turns off AC output

Full specifications

Capacity6,144Wh per battery (102.4V, 60Ah), LFP
ExpansionUp to 30kWh per inverter (5 batteries); up to 90kWh and 21.6kW with 3 inverters on EcoFlow's Smart Home Panel 2
AC outputPure sine, 7,200W total, 120V/240V 60Hz; surge 10.8kW for 10 seconds (LRA 120A)
AC outletsBackup-UPS outlets: 2 x 120V 20A and 1 x 120V/240V 30A; online-UPS outlets: 2 x 120V 20A and 1 x 120V 30A (EcoFlow counts 11 outlets on the inverter, USB included)
DC outputs2 x USB-C 100W; 2 x USB-A 12W; 12.6V 30A (378W max)
AC charging100-120V 15A or 200-240V 12.5A; EcoFlow states up to 6,200W fastest charging with one battery (about 92 minutes)
Solar input5,600W total over 2 ports: high-PV 80-450V 15A 4,000W max; low-PV 30-150V 15A 1,600W max
UPSBackup UPS under 20 ms; online UPS 0 ms
Cycle life80% capacity after 3,500 cycles
Weather ratingIP54
Safety listingEcoFlow's product title says 'UL 9540 Certificated'
ConnectivityBluetooth, Wi-Fi and 4G
Operating temperature-4°F to 113°F (-20°C to 45°C); the battery self-heats below freezing
Inverter size and weight690 x 481 x 214 mm (27.2 x 18.9 x 8.4 in); 31.7 kg (70 lb)
Battery size and weight660 x 455 x 204 mm (26 x 18 x 8 in); 50.7 kg (111.8 lb)
Warranty5 years (inverter and battery)

From manufacturer documentation, checked November 2, 2026. Spotted an error? Tell us.

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