EcoFlow DELTA Pro Ultra X Inverter

The EcoFlow DELTA Pro Ultra X Inverter is the power core of EcoFlow's largest whole-home backup system. A single inverter delivers 12kW of 120/240V split-phase output with Adaptive Start surge up to 45kW, enough to start large loads such as a 5-ton central AC, and accepts 10kW of solar. Combine it with DELTA Pro Ultra X batteries and a Smart Home Panel 3 for a system built to carry a home, ranch or remote communications site through prolonged outages.

12kW Output, Scalable to 36kW

Each inverter provides 12kW at 120/240V, 60Hz. Run up to three in parallel for 36kW. Adaptive Start surge reaches up to 45kW for heavy motor loads.

10kW Solar Input

Two PV inputs (80–500V, 15A, 5,000W each) accept up to 10kW of solar. EcoFlow states about 80% charge in roughly one hour with 10kW of solar under controlled test conditions.

Fast, Automatic Transfer

Standalone UPS switchover is under 10 ms; with Smart Home Panel 3 or Smart Gateway it is under 20 ms. The inverter also works with the EcoFlow FlowMaster Generator Rectifier for generator charging. Grid export is not supported.

Direct Outlets for Field Use

• 2 x NEMA 5-20 (120V, 20A)
• 1 x NEMA L14-30 (120/240V, 30A)
• 1 x NEMA 14-50 (120/240V, 50A)

Rugged and Quiet

Operates from -4°F to 122°F, runs below 30dB at 4kW (0.5 m), and the system carries an IP54 rating. Backed by a 5-year warranty.

Specifications

Rated AC output	12,000W, 120/240V split-phase, 60Hz
Parallel	Up to 3 inverters, 36kW
Surge output	Up to 45kW (Adaptive Start)
AC outlets	2x NEMA 5-20 (120V/20A), 1x NEMA L14-30 (120/240V/30A), 1x NEMA 14-50 (120/240V/50A)
Solar input	10kW total, 2 ports, 80-500V, 15A, 5,000W max each
AC input	12kW rated, 100/200-120/240V, 50A
Charge time	About 80% in about 1 hour with 10kW solar (EcoFlow controlled test)
Switchover	Under 10 ms standalone; under 20 ms with Smart Home Panel 3 / Smart Gateway
Grid export	Not supported
Battery compatibility	DELTA Pro Ultra X Smart Extra Battery (up to 10 per inverter)
Dimensions	26.6 x 18.7 x 9.06 in (675 x 475 x 230 mm)
Weight	70.06 lb (34.5 kg)
IP rating	IP54 (system)
Operating temperature	-4 to 122F (-20 to 50C)
Noise	Under 30dB at 4kW, 0.5 m
App	EcoFlow app
Warranty	5 years