EcoFlow DELTA Pro Ultra - Whole-Home Backup System

Name: EcoFlow DELTA Pro Ultra - Whole-Home Backup System
Rating: 5.00 (1 reviews)

BY: EcoFlow

SKU: EFDPUPCS-BP

| Availability: OUT OF STOCK

$6,299.00

$4,199.00

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Product Highlights

Built for home backup and off-grid power
Pure sine wave output delivers clean power for sensitive electronics
Portable design simplifies transport and positioning
Built-in electrical protections help safeguard connected equipment

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EcoFlow DELTA Pro Ultra - Whole-Home Backup System

The EcoFlow DELTA Pro Ultra is a next-generation whole-home backup power solution, offering unmatched scalability, fast recharge capabilities, and powerful output to meet your home's energy demands. With a 7200W output and up to 21.6kWh capacity per unit (expandable to 90kWh), this modular system supports heavy loads such as HVACs, refrigerators, and home electronics with ease. Whether you're living off-grid, preparing for outages, or investing in energy independence, the DELTA Pro Ultra is a powerhouse built for the future.

EcoFlow DELTA Pro Ultra – Whole-Home Backup System Features

7200W Output with 120V/240V Split-Phase

Delivers enough power for demanding appliances and whole-home operation, including electric ovens, AC units, and well pumps.

Expandable up to 90kWh Capacity

Start with one unit and scale up with additional batteries for longer runtimes and full-day home coverage.

Fast Charging Options: Solar, AC, EV, and Generator

Recharge via solar panels, wall outlets, EV stations, or gas generators—whichever suits your lifestyle and setup.

Seamless Home Integration

Pairs with EcoFlow Smart Home Panel 2 to automatically detect outages and instantly switch to backup power without interruption.

Quiet and Safe Operation

Runs silently indoors with advanced battery safety and thermal controls—no fumes, noise, or maintenance like gas generators.

App Monitoring and Control

Track real-time energy use, battery status, and charging settings through the EcoFlow app from anywhere.

EcoFlow DELTA Pro Ultra – Whole-Home Backup System Applications

Whole-home emergency backup - Keeps your lights, fridge, internet, and HVAC running during blackouts.

Off-grid living - Supports long-term energy independence with solar recharging and high-capacity storage.

Solar energy storage - Stores daytime solar for night use, reducing electricity bills and grid reliance.

Mobile power for RVs or cabins - Provides powerful and silent backup for remote setups or traveling.

Smart home energy management - Integrates with EcoFlow Smart Home Panel for smart load prioritization and seamless switching.

What's Included

Everything you need is included with your product.

DELTA Pro Ultra Inverter Box

1 x DELTA Pro Ultra Inverter (70 lbs)
1 x Portable Stand + 4 x Wheels
1 x Assembly/Disassembly Tool
1 x Solar Low-PV Charging Cable
1 x AC Charging Cable C-20
1 x Quick-Start Guide
1 x Warranty Card

DELTA Pro Ultra Battery Box

1 x DELTA Pro Ultra Battery (116 lbs)
1 x Inverter/Battery Connection Cable
1 x Safety Guide

Smart Home Panel 2

1 x EcoFlow Smart Home Panel 2 (glass door and deadfront cover packaged separately)
1 x Marking-off Template
1 x EcoFlow Power Input/Output Cable*

*Two Power Input/Output Cables are included with two inverter purchases, and three Power Input/Output Cables are included with three inverter purchases.

EcoFlow DELTA Pro Ultra - Whole-Home Backup System Specifications

EcoFlow DELTA Pro Ultra Specifications

Category	Specifications
Model	EFYJ751-PCS-US
Net Weight	31.7 kg \| 69.9 lbs
Dimensions	690 × 481 × 214 mm \| 27.2 × 18.9 × 8.4 in
Wi-Fi	Frequency range: 2,412-2,462MHz \| 2,422-2,452MHz Maximum output power: 0.3597W
Bluetooth	Frequency range: 2,402-2,480MHz Maximum output power: 0.0109W
4G Modem Port	Supported with the EcoFlow 4G Dongle
Screen	Supported
Grid-Tied	Unsupported
Maximum Operating Altitude	3000m \| 9842.5ft
IP Protection Rating	IP54
Noise Level	<30 dB
Uninterrupted Power Supply (UPS)	Backup UPS <20 ms; online UPS 0 ms
Operating Temperature	Discharging temperature: −20°C to 45°C (−4°F to 113°F) Charging temperature: −20°C to 45°C (−4°F to 113°F) Storage temperature: −20°C to 45°C (−4°F to 113°F) Optimum temperature: −20°C to 45°C(68°C to 86°F))

DELTA Pro Ultra Inverter Output Specifications

Category	Specifications
AC Output	Discharging: Pure sine, 7200W Max, 120V/240V~ 60Hz Bypass: 100-120V~30A total, 50Hz/60Hz, 3600W Max
AC Output Ports (20A)	4 x AC Output Sockets: 120V, 20A Max Per Port
AC Output Ports (30A)	1 x AC Output Socket: 120V, 30A Max 1 x NEMA L14-30 120/240V Split Phase Port
USB Ports	2 x USB-A: 5V⎓2.4A, 12W max per port, total 24W 2 x USB-C: 5/9/12/15/20V⎓5A100W max per port, total 200W
DC Output	1 x DC Port: 12.6V⎓30A, 378W Max
Anderson DC Port	1 x Anderson DC Output Port: 12.6V, 30A, 378W Max
Input/Output Port (Infinity Port)	1 x Power Input/Output Port: 100-120V, 30A; Serves as both an AC input (for charging) and output (for connecting to the Smart Home Panel 2 or EV Charger)

DELTA Pro Ultra Inverter Input Specifications

Category	Specifications
AC Input	Charging: 100-120V~15A; 200-240V~12.5A, 50/60Hz Bypass: 100-120V~15A, 50/60Hz (duration < 3hrs when the current exceeds 12A)
Power Input/Output (Infinity Port)	100-120~30A; 200-240V~30A, 50/60Hz
High Photovoltaic (PV) Input	80-450V⎓15A max, 4,000W max
Low Photovoltaic (PV) Input	30-150V⎓15A max, 1,600W max
Standby Power Consumption	<12W

DELTA Pro Ultra Battery Specifications

Category	Specifications
Model	EFYJ751-BP
Net Weight	52.7 kg \| 116.4 lbs
Dimensions	660 × 455 × 204 mm \| 26 × 18 × 8 in
Capacity	102.4V⎓60A, 6,144Wh
Cell Material	LFP
Cycle Life	The battery maintains 80%+ SOH (state of health) after 3,500 cycles at 0.5C/0.5C at 25°C (77°F)
Protection Type	Overvoltage protection, overload protection, overtemperature protection, short circuit protection, low temperature protection, low voltage protection, overcurrent protection
Operating Temperature	Discharging temp: −20°C to 45°C (−4°F to 113°F) Charging temp: −20°C to 45°C (−4°F to 113°F) Storage temp: −20°C to 45°C (−4°F to 113°F) (optimum: −20°C to 45°C(68°F to 86°F))
Maximum Operating Altitude	3000m \| 9842.5ft
IP Protection Rating	IP54

DELTA Pro Ultra & Smart Home Panel 2 Instructional Videos

Frequently-Asked Questions

How much power can the DELTA Pro Ultra provide?

The base system delivers 6kW of output, but it can expand up to 21.6kW by adding more units in parallel.

Can this system run my entire home?

Yes, when configured with multiple inverters and batteries, the DELTA Pro Ultra can power home circuits, HVAC systems, and high-energy appliances.

How long does the battery last?

The LiFePO4 battery is rated for 3,500+ charge cycles, which means over 10 years of daily use.

Can I charge it with solar panels?

Yes! The DELTA Pro Ultra supports up to 16.8kW of solar input, making it perfect for off-grid setups.

Is the installation complicated?

The system is designed for easy integration with home electrical panels. A licensed electrician is recommended for whole-home installations.

EcoFlow DELTA Pro Ultra Manual & Downloads

Shipping & Easy Returns

Shipping is free across the Lower 48. No fuel surcharges, no residential fees, and no liftgate charge on freight orders. The price you see is the price you pay. Read our full Shipping Policy here.

Most orders leave the warehouse in 1 to 2 business days and arrive within 3 to 10 business days. We send tracking the moment it ships.

Anything that ships on a pallet goes freight with liftgate and pallet jack included, so the driver gets it off the truck and onto the ground at your address. The carrier will call you directly to schedule a delivery window.

Returns are 30 days from delivery. For freight deliveries, inspect the shipment before you sign for it. If something is damaged in transit, note it on the delivery receipt and we handle the freight claim, not you. Read more about our Returns Policy here.

Why Buy From Us

Buying solar online should not mean guessing your way through the install. Here’s what you get with Off-Grid Source.

We size the system, not just sell it. Call before you order and a sales engineer will check the kit against your actual loads, tell you if you’re buying too much or too little, and list the site-specific parts your install will need.
A+ rated by the Better Business Bureau. Another trust signal that you’re buying from a real company that stands behind the sale.
Free shipping across the Lower 48. No hidden freight charges, residential fees, or liftgate surprises at checkout.
Guaranteed best prices. Find the same product for less elsewhere and we’ll match it.
30-day easy returns. If it is not the right fit, we’ll help you get it sent back.
A real person on the phone. Product questions, sizing, install planning, warranty help: call us at +1 (877) 556-3347.

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Our Customers Tell It Better Than We Do

Excellent 4.9/5

Trusted By 10,000+ Customers. See All Reviews.

They Stood By Me

I was a DIY solar power wannabe... that is 'til I connected with Manny... The man's a prince! He not only knows his stuff; he walked me through all things electrical. To make sure I had all I needed... he gave me his cell phone # to text him anytime I got confused... nights and weekends included. The prices were very competitive... definitely go with Manny -- you won't go wrong!

Bruce D.

Awesome Service!

I am always hesitant to buy things at places I have never shopped... I want to give a shout out to Manny who with great patience and knowledge helped me get my orders... I felt valued as a customer and I will definitely be back in the future. I highly recommend them, they make you feel like family.

Jennene A.

Real Person, Honest Service.

I'm about to go off grid. I called Manny, he walked me through everything so I could truly understand what I needed and never tried to upsell me. He was honest and made a customer for life.

Ray B.

Easy Return

I would personally like to thank Manny... I purchased the inverter and decided I needed to return it... Manny was very understanding and went out of his way to help me return the product and not even have to pay for shipping return. He gives this company reputation, honor and quality customer service!

Roger V.

Totally Off Grid.

I have been talking with Manny the owner... He has not only helped me design a system but he's been assisting with the install and components. I am super pleased so far with the assistance.

Jeff S.

Great Product! Fast Shipping

We added 2 more batteries to our current set up. Pleased with the customer service from Off-Grid Source! Will be back!

Jason

Excellent Customer Service

Very fast response times. Very professional. I highly recommend!

Ray W.

EcoFlow DELTA Pro Ultra - Whole-Home Backup System

Product Highlights

EcoFlow DELTA Pro Ultra - Whole-Home Backup System

EcoFlow DELTA Pro Ultra – Whole-Home Backup System Features

EcoFlow DELTA Pro Ultra – Whole-Home Backup System Applications

What's Included

EcoFlow DELTA Pro Ultra - Whole-Home Backup System Specifications

EcoFlow DELTA Pro Ultra Specifications

DELTA Pro Ultra Inverter Output Specifications

DELTA Pro Ultra Inverter Input Specifications

DELTA Pro Ultra Battery Specifications

DELTA Pro Ultra & Smart Home Panel 2 Instructional Videos

Frequently-Asked Questions

EcoFlow DELTA Pro Ultra Manual & Downloads

Shipping & Easy Returns

Why Buy From Us

Why Choose Off Grid Source

Our Customers Tell It Better Than We Do

They Stood By Me

Awesome Service!

Real Person, Honest Service.

Easy Return

Totally Off Grid.

Great Product! Fast Shipping

Excellent Customer Service