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EcoFlow

DELTA Pro Ultra X

All-in-One System

EcoFlow's flagship plug-and-play whole-home system. 12 kW continuous AC and 12 kWh LFP per inverter, expandable to ~61 kWh per inverter and ~184 kWh / 36 kW across three inverters. Accepts up to 10 kW of solar.

The DELTA Pro Ultra X is EcoFlow's 2025 whole-home backup platform, built to install in days rather than weeks. A single inverter delivers 12 kW of continuous split-phase output and pairs with 12 kWh of LFP storage; stack batteries to ~61 kWh per inverter, or chain up to three inverters for ~36 kW and ~184 kWh. Paired with EcoFlow's Smart Home Panel or Smart Gateway it covers every circuit, switches over in about 20 ms, and accepts up to 10 kW of PV for off-grid solar charging.
Normalized price
$667 per kWh

$7,999 listed price

Methodology: lowest in-stock merchant price · normalized to nameplate

Whole-home backup with peak loads up to 12 kW (per inverter)
Outpost editorial pick
The data

Specifications

Battery

Capacity (nominal) 12 kWh
Chemistry LFP
Max expandable capacity 184 kWh

Output

Continuous AC output 12 kW
Surge output 24 kW
UPS switchover 20 ms

Smart features & certifications

App / Wi-Fi Yes
App brand EcoFlow
Certifications FCC

Physical

Weight 85 kg

Warranty

Warranty 5 years

Compare specs side by side

Pick up to 2 competitors to see specs lined up.
Editorial

Best for, watch out for

Best for

  • Whole-home backup with peak loads up to 12 kW (per inverter)
  • Fast, plug-and-play installs paired with a Smart Home Panel or Smart Gateway
  • Owners who want to grow capacity later to ~61 kWh per inverter, ~184 kWh total

Watch out for

  • Heavy cabinet on casters; plan a permanent indoor or sheltered location
  • Maximum stacks only with EcoFlow's matching battery SKU; mixed-vendor batteries are not supported
The market

Price history

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The shortlist

Three alternatives we'd consider

Cheaper

Bluetti AC500 B300K 5000W Portable Power Station

Bluetti

AC500 B300K 5000W Portable Power Station

All-in-One System

2.764kWh · LFP

Modular whole-home power system. The AC500 head unit pairs with up to six B300K LFP packs (2.76 kWh each) for an 18.4 kWh total. 5000 W of pure-sine AC and 240 V split-phase capable.

$4,199 View details →

Similar price

EcoFlow DELTA Pro Ultra X (1 Inverter + 2 Batteries)

EcoFlow

DELTA Pro Ultra X (1 Inverter + 2 Batteries)

All-in-One System

12kWh · LFP

EcoFlow's flagship hybrid AIO base unit. 12 kW continuous AC output paired with 12 kWh of LFP storage in a single rolling enclosure, expandable up to ~62 kWh by chaining additional battery modules.

$7,999 View details →

Cheaper

EcoFlow Delta Pro Ultra 6kWh Power Station

EcoFlow

Delta Pro Ultra 6kWh Power Station

All-in-One System

6.144kWh · LFP

Modular whole-home power. Each Inverter module = 7200 W AC + 5600 W solar; each battery module = 6.1 kWh LFP. Stack up to 21.6 kW AC and 90 kWh of storage.

$5,499 View details →

Common questions

What people ask about the DELTA Pro Ultra X

Why pick an all-in-one over separate inverter + battery?
EcoFlow DELTA Pro Ultra X bundles the inverter and battery into a single enclosure, fewer parts to install, single warranty, single brand to call when something goes wrong, and the inverter is matched to the battery chemistry from the factory (closed-loop comms always work). The trade-off is less flexibility: when you outgrow the AIO, the upgrade path is "buy a second unit", not "swap the inverter". For most homeowners with predictable needs, the simplicity wins.
What can EcoFlow DELTA Pro Ultra X back up?
EcoFlow DELTA Pro Ultra X delivers 12000W continuous and 12kWh of usable energy. That's enough to back up a fridge, internet/networking, lights, well pump cycling, and one or two essentials (laptop charging, modem, security system) for 24–40 hours of typical critical-loads use. Whole-home backup including HVAC + electric range usually requires two of these units in parallel or a larger system.
How does it expand?
EcoFlow DELTA Pro Ultra X expands battery capacity up to 184kWh by adding compatible expansion batteries to the same enclosure or chained inline. Inverter output stays fixed at 12000W, adding battery extends runtime, not peak power.
What about UPS-grade switchover for sensitive devices?
EcoFlow DELTA Pro Ultra X switches to battery in 20ms, fast enough to qualify as an online UPS for desktops and modems. For server/NAS-grade equipment, sub-10ms is the bar.

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