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EcoFlow DELTA Pro Ultra Battery Pack

Expand Your Home Backup With 6.144kWh of LFP Storage

Restaurant-grade performance — sear at 1,000°F+ with infrared burners

304 stainless steel construction — rust-resistant, built to last decades

Ships fully assembled — wheel it out, fire it up same day

10-year warranty standard — industry-leading coverage on all burners

Price range: $1,842.95 through $4,825.95

EcoFlow DELTA Pro Ultra Battery Pack

$1,842.95 – $4,825.95

Number of Batteries

Clear

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Free Returns 30-day hassle-free returns.

Free Delivery Every order, every time.

Ships in 3–5 Days Heavy-duty crating included.

4.9/5 Stars 2,400+ verified reviews.

Expand Your Home Backup With 6.144kWh of LFP Storage

The EcoFlow DELTA Pro Ultra Battery delivers 6.144kWh of off-grid proven energy storage in a single unit, scaling up to 90kWh for whole-home backup. This vetted LFP battery maintains 80%+ state of health after 3,500 cycles—a long-term investment for anyone serious about energy independence. Designed for seamless integration with the DELTA Pro Ultra system, it handles essential appliances through extended outages. Every unit we carry is curated for real-world durability, with IP54 protection and seven built-in safety systems. Ships free with a 30-day hassle-free return window.

FREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORT

LFP Chemistry

IP54 Rated

3,500 Cycle Life

Ships Free

6.144kWh

Capacity Per Unit

90kWh

Max Expandable

3,500

Cycles to 80% SOH

Feature. . This ensures long-lasting durability and consistent performance in demanding conditions. Professional-grade materials and expert engineering come together to deliver a product you can rely on day after day, job after job. Every detail has been carefully considered to maximize your satisfaction and minimize downtime.

Compatibility Check

Make sure this battery integrates cleanly with your setup before ordering.

Compatible exclusively with EcoFlow DELTA Pro Ultra systems
Operating environment stays within −4°F to 113°F
Installation space accommodates 26 × 18 × 8 in per unit

Built For Real Scenarios

This battery is engineered for homeowners who need dependable power when the grid fails or doesn't exist at all.

Whole-Home Backup Power

Off-Grid Cabin Living

Solar Storage Expansion

Full specifications

At a glance

Dimensions: 26 × 18 × 8 in
Power: 102.4V
Surface: LFP

Full specifications11 data points across 4 categories

Dimensions

Weight (ea)	111.8 lb
Dimensions (ea)	26 × 18 × 8 in

Power & Performance

Capacity	6.144kWh per unit
Voltage	102.4V
Cycle Life	The battery maintains 80%+ SOH (state of health) after 3,500 cycles at 0.5C/0.5C at 25°C (77°F)
Discharging Temp	−4°F to 113°F
Charging Temp	−4°F to 113°F
Storage Temp	−4°F to 113°F

Materials

Cell Material	LFP
IP Rating	IP54

Compliance & Warranty

Protection type	Overvoltage protection, overload protection, overtemperature protection, short circuit protection, low temperature protection, low voltage protection, overcurrent protection

The Off Grid Vault Promise

Every product we stock earns its place. Here's what that means for you.

Free ShippingEvery order ships free—no minimums, no fine print, no thresholds.

30-Day Hassle-Free ReturnsNot the right fit? Send it back within 30 days, no runaround.

Vetted for Real PerformanceWe verify specs, test claims, and reject anything that doesn't meet our standards.

★★★★★

“Outstanding quality and performance. The EcoFlow exceeded my expectations in every way.”

First L.United States

DELTA Pro Ultra Battery Pack

The EcoFlow DELTA Pro Ultra Battery is a high-capacity, modular energy storage solution designed to provide reliable backup power for your home. With a 6kWh base capacity, this advanced lithium iron phosphate (LiFePO4) battery is expandable up to 90kWh, ensuring uninterrupted energy for extended outages or off-grid living.

Designed for seamless integration with the EcoFlow DELTA Pro Ultra system, this battery supports scalable power needs, whether you’re running essential appliances or powering your entire home. Its long lifespan, fast charging capabilities, and intelligent energy management make it an ideal choice for homeowners seeking energy independence, solar storage, or emergency backup power.

Stay prepared for anything with the EcoFlow DELTA Pro Ultra Battery, a reliable and expandable energy storage solution built for long-term performance.

Included: EcoFlow DELTA Pro Ultra Battery, EcoFlow Battery Connection Cable (DELTA Pro Ultra) 0.2m, and Safety Guide.

EcoFlow DELTA Pro Ultra Battery Specs

Weight (ea): 111.8 lb
Dimensions (ea): 26 × 18 × 8 in
Capacity: 6.144kWh per unit
Voltage: 102.4V
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
IP Rating: IP54
Discharging Temp: −4°F to 113°F
Charging Temp: −4°F to 113°F
Storage Temp: −4°F to 113°F

Your Satisfaction with EcoFlow is Guaranteed:

5-Year Limited Warranty
Lowest Price Guarantee

Additional information

Number of Batteries	1 x DELTA Pro Ultra Battery, 2 x DELTA Pro Ultra Batteries, 3 x DELTA Pro Ultra Batteries

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Frequently Asked Questions

Do grills ship assembled or in pieces?

All grills ship fully assembled in heavy-duty crating. Just remove the packaging, add propane or charcoal, and cook. No tools required.

What is your return policy?

We offer free 30-day returns on all grills. If you're not completely satisfied with your purchase, contact us and we'll arrange a free pickup.

Do you offer financing?

Yes — 0% interest financing is available on eligible purchases. Split into 4, 6, or 12 monthly payments with no hidden fees.

Are replacement parts available?

Yes. We carry a full catalog of OEM replacement parts including grates, burners, igniters, and heat shields for every brand we carry.

Can I use these grills year-round?

Absolutely. Our grills are built for all-weather use. The 304 stainless steel construction is designed to handle temperature extremes from -20°F winters to 110°F summers.

SKU: EFDeltaProUltra-BP-US Category: Expansion Batteries Brand: ecoflow

The Off Grid Vault Promise

Every product we stock earns its place. Here's what that means for you.

Free Shipping Every order ships free—no minimums, no fine print, no thresholds.

30-Day Hassle-Free Returns Not the right fit? Send it back within 30 days, no runaround.

Vetted for Real Performance We verify specs, test claims, and reject anything that doesn't meet our standards.

About ecoflow Expansion Batteries

ecoflow is a trusted manufacturer of premium expansion batteries. OffGridVault is an authorized dealer offering the full ecoflow lineup with free delivery, price match guarantee, and expert support.

View all ecoflow products →

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EcoFlow DELTA Pro Ultra Battery Pack

Expand Your Home Backup With 6.144kWh of LFP Storage

Compatibility Check

Built For Real Scenarios

Full specifications

At a glance

Dimensions

Power & Performance

Materials

Compliance & Warranty

The Off Grid Vault Promise

DELTA Pro Ultra Battery Pack

EcoFlow DELTA Pro Ultra Battery Specs

Your Satisfaction with EcoFlow is Guaranteed:

Additional information

Reviews

Frequently Asked Questions

The Off Grid Vault Promise

Related products

About ecoflow Expansion Batteries

Related Categories

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