EcoFlow DELTA Pro Ultra Inverter + 1* Battery + 1* 400W Solar Panel

Name: EcoFlow DELTA Pro Ultra Inverter + 1* Battery + 1* 400W Solar Panel
Brand: EcoFlow
SKU: EFDPU-BP-400w-US
Price: 4649.0 USD
Availability: OutOfStock

BY: EcoFlow

SKU: EFDPU-BP-400w-US

| Availability: OUT OF STOCK

$7,297.00

$4,649.00

Sold out

Product Highlights

Built for home backup and off-grid power
6,144 Wh capacity for extended backup and off-grid runtime
400 W solar output for larger off-grid energy systems
7,200 W output to run high-demand appliances and equipment

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EcoFlow DELTA Pro Ultra Inverter + 1 x Battery + 1 x 400W Solar Panel

Experience next-level whole-home backup power with the EcoFlow DELTA Pro Ultra Kit. This all-in-one system includes a powerful DELTA Pro Ultra Inverter, one high-capacity battery, and a 400W solar panel—giving you a scalable, smart, and solar-ready power solution for grid outages, off-grid setups, or sustainable energy independence. With support for 240V split-phase, up to 21.6kWh capacity (expandable), and ultra-fast solar + AC charging, this bundle is built to handle nearly any situation.

EcoFlow DELTA Pro Ultra Inverter + 1 x Battery + 1 x 400W Solar Panel Features

All-in-One Power Solution – Includes the inverter, one battery, and a 400W solar panel—everything you need to get started with clean, reliable power.

Massive Expandable Power – Start with 6kWh and expand up to 21.6kWh with additional batteries to meet your long-term energy needs.

240V Split-Phase Support – Power high-demand appliances like dryers, central air, and well pumps with whole-home backup capabilities.

Industry-Leading Solar Input – Harness the sun with a max solar input of 5600W and get a charge in as fast as 2.7 hours using EcoFlow’s solar panels.

Smart Energy Control – Monitor, optimize, and manage your power usage using the EcoFlow app, offering real-time data and advanced settings.

Quiet & Emission-Free Backup – Unlike gas generators, the DELTA Pro Ultra runs silently, with no fumes, no fuel, and no maintenance.

What's Included

Everything you need is included with your product.

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 DELTA Pro Ultra Battery (116 lbs)
1 x Inverter/Battery Connection Cable
1 x Safety Guide
1 x Quick-Start Guide
1 x Warranty Card

EcoFlow DELTA Pro Ultra Specifications

DELTA Pro Ultra Inverter General Specifications

Category	Specification
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	Specification
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⎓5A, 100W 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	Specification
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	Specification
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°C to 86°F))
Maximum Operating Altitude	3000m \| 9842.5ft
IP Protection Rating	IP54

EcoFlow 400W Portable Solar Panel Specifications

Category	Specification
Rated Power	400W (±3%)
Open Circuit Voltage	48V (Vmp 41V)
Short Circuit Current	11A (Imp 9.8A)
Cell Type	Monocrystalline Silicone
Efficiency	23%
Dimensions	42.0 x 94.1 x 1.0 in \| 106.8 x 239.0 x .4 cm
Connector Type	MC4 Solar Connector
Weight (Solar Panel)	35.3 lbs \| 16.0 kg
Weight (Solar Panel With Kickstand Case)	41.9 lbs \| 19 kg

Frequently-Asked Questions

Can this system power my entire home?

Yes! The DELTA Pro Ultra supports 240V split-phase, meaning you can power whole-home systems including HVAC, dryers, and well pumps. You may need an electrician to integrate it with your home panel.

Is the battery expandable?

Absolutely. You can expand the system to up to 21.6kWh using additional EcoFlow batteries. It’s scalable depending on your needs.

Can I use other solar panels with this system?

Yes. The system accepts up to 5600W of solar input and supports third-party panels with compatible voltage and connectors.

Does it work during a blackout?

Yes. The DELTA Pro Ultra instantly switches to battery mode during an outage, ensuring uninterrupted power.

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.