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EcoFlow DELTA Pro Ultra Whole-Home Backup Power

EcoFlow DELTA Pro Ultra Whole-Home Backup Power
Save 33% Save 33%
$6,098.00
$6,098.00 - $14,179.00
$6,098.00
$4,099.00
$4,099.00 - $14,179.00
$4,099.00
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✓ Lowest Price Guaranteed
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✓ Questions? Talk to a EcoFlow Expert: 1-303-876-7654
✓ PRICE MATCH GUARANTEE


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Number of Inverters: 1 x EcoFlow Delta Pro Ultra Inverter
Number of Battery Packs: 1 x Battery- 6.144kWh
Number of Smart Home Panel 2: None
UL 9540 & UL 1973 Certified Home Backup

EcoFlow DELTA Pro Ultra: Whole-Home Backup Power That Never Lets You Down

The EcoFlow DELTA Pro Ultra is a scalable, expandable whole-home battery backup system built to keep your household running through any outage — from a few hours to a full month. With a modular 6.144kWh–90kWh LFP battery bank and a 7,200W inverter (expandable to 21,600W), it powers everything from your refrigerator and Wi-Fi router to a 3-ton central air conditioner, without the noise or fumes of a gas generator.

Charge it from solar, the grid, a gas generator, or your EV charging pile — often at the same time — and let its smart energy management system handle the switching automatically. As an authorized EcoFlow dealer, Renewable Outdoors backs every DELTA Pro Ultra with a 5-year limited warranty and our Lowest Price Guarantee.

5-Year Limited Warranty
Lowest Price Guarantee
Authorized EcoFlow Dealer
Free US Shipping
0% APR Financing
Expert Support: (303) 876-7654

Why Homeowners Choose the DELTA Pro Ultra

Up to a Month of Power

Stack batteries up to a 90kWh system for 30+ days of essential backup — enough to keep lights, refrigeration, and medical equipment running through extended outages. Compact and stackable, it fits in a garage or utility closet.

Runs Your Whole Home

A 7,200W continuous output handles energy-hungry appliances like a 3-ton central AC. Pair three inverters with an EcoFlow Smart Home Panel 2 to unlock 21,600W and cover the entire house at once.

Rapid Solar Charging

Advanced High and Low-PV technology delivers up to 5,600W of solar input per inverter — 16,800W across three units — enough to bank a full day of home power in about an hour of strong sun.

5 Ways to Recharge

Charge from solar, the grid, a gas generator, or an EV charging pile. Industry-fastest AC charging tops up 8,800W — a full two-battery recharge in about two hours.

Silent, Uninterrupted Backup

Online UPS mode delivers true 0ms switchover to protect sensitive electronics, and for draws under 2,000W it runs at a whisper-quiet 0dB — you'll never notice the grid went down.

Built for the Long Haul

Certified to UL1973 and UL9540 — the standard for home energy storage — with IP54 protection, an LFP battery rated for 3,500+ cycles to 80% health, and reliable operation from -4°F to 113°F.

What's Included

EcoFlow DELTA Pro Ultra inverter unit

Inverter Kit

  • EcoFlow DELTA Pro Ultra Inverter
  • EcoFlow Portable Stand
  • AC Charging Cable (C20)
  • Solar to Low-PV Port Charging Cable
  • Disassembly and Assembly Tool
  • Quick Start Guide & Warranty Card
EcoFlow DELTA Pro Ultra battery pack

Battery Kit (per battery)

  • EcoFlow DELTA Pro Ultra Battery (6.144kWh)
  • Battery Connection Cable (0.2m)
  • Safety Guide

Choose your configuration above — from a single inverter + battery up to a 5-battery, 30.72kWh system.

Find Your Right-Sized System

The DELTA Pro Ultra is fully modular — start with one battery and add more later as your needs grow. Here's roughly how far each configuration goes for a typical household running essential circuits (lights, refrigerator, Wi-Fi, and select outlets):

Configuration Total Capacity Typical Backup* Best For
1 Inverter + 1 Battery 6.144 kWh 1–3 days Essential circuits during short outages
1 Inverter + 2 Batteries 12.288 kWh 3–5 days Extended outages, partial-home coverage
1 Inverter + 3 Batteries 18.432 kWh 6–7 days Multi-day storms, medical equipment needs
1 Inverter + 4 Batteries 24.576 kWh ~1–2 weeks Frequent or unpredictable grid outages
1 Inverter + 5 Batteries 30.72 kWh 2+ weeks Off-grid supplementation, storm season prep

*Backup duration varies with your home's actual energy use, climate, and appliance load. Stack multiple inverters and add an EcoFlow Smart Home Panel 2 for full whole-house circuit coverage up to 90kWh.

EcoFlow DELTA Pro Ultra Specifications

Capacity (per battery) 102.4V⎓60A, 6,144Wh, LFP chemistry
AC Output (Continuous) 7,200W pure sine wave, 120V/240V~ 60Hz (expandable to 21,600W with 3 inverters + Smart Home Panel 2)
AC Surge Output 10,800W
DC Output 12.6V⎓30A, 378W max
USB Ports 2× USB-A (5V⎓2.4A, 12W max each); 2× USB-C (up to 100W max each, 200W total)
Solar Input (per inverter) High-PV: 80–450V⎓15A, 4,000W max · Low-PV: 30–150V⎓15A, 1,600W max (5,600W combined)
AC Charging Input 100–120V~15A or 200–240V~12.5A, 50/60Hz; up to 8,800W with dual-battery fast charging
Battery Cycle Life 80%+ capacity retained after 3,500 cycles (0.5C/0.5C at 77°F)
UPS Response Time <20ms (backup mode) / 0ms (online UPS mode)
Certifications UL1973 (battery safety) & UL9540 (energy storage systems)
IP Rating IP54 (dust and splash resistant)
Operating Temperature -4°F to 113°F (charging, discharging & storage)
Connectivity Bluetooth, Wi-Fi, and 4G (via EcoFlow app)
Inverter Dimensions / Weight 27.2 × 18.9 × 8.4 in / 70 lb
Battery Dimensions / Weight (each) 26 × 18 × 8 in / 111.8 lb
Warranty 5-Year Limited Warranty

5-Year Limited Warranty

Every DELTA Pro Ultra we sell is backed by EcoFlow's full manufacturer warranty.

Lowest Price Guarantee

Found it cheaper elsewhere? Call us at (303) 876-7654 before you buy.

Authorized EcoFlow Dealer

Genuine hardware, full manufacturer support, and expert sizing advice from our team.

EcoFlow DELTA Pro Ultra: Frequently Asked Questions

How long will the DELTA Pro Ultra power my home during an outage?
A single inverter + battery (6.144kWh) typically covers 1–3 days of essential circuits like refrigeration, lighting, and Wi-Fi. Adding batteries extends that significantly — a 5-battery, 30.72kWh system can provide two weeks or more of backup, and a fully stacked 90kWh system is rated for over 30 days. Actual runtime depends on which appliances you're powering and your home's overall energy use.
What's the difference between the inverter and the battery — do I need both?
Yes, you need at least one of each. The inverter is the "brain" of the system — it converts battery power into usable AC electricity, manages charging inputs, and handles switchover during an outage. The battery is the energy storage. Every configuration starts with 1 inverter and can scale up to 5 batteries per inverter, or multiple inverters for whole-home output.
Can I add more batteries later if I start with a smaller system?
Yes. The DELTA Pro Ultra is fully modular, so you can start with one battery and expand up to 5 batteries per inverter (30.72kWh) — or add additional inverters and an EcoFlow Smart Home Panel 2 to scale all the way to a 90kWh whole-home system.
Can the DELTA Pro Ultra be charged with solar panels?
Yes. Each inverter accepts up to 5,600W of combined solar input (4,000W High-PV plus 1,600W Low-PV), and three inverters together can accept up to 16,800W — enough to recharge a full day's worth of home energy in about an hour of strong sunlight. It works with both portable solar panels and existing rooftop solar systems.
Do I need a professional electrician to install it?
For portable, plug-in use (running extension cords or select devices), no installation is required — just charge it and go. For whole-home backup that ties into your home's electrical panel or an EcoFlow Smart Home Panel 2, we recommend professional installation by a licensed electrician to ensure safe, code-compliant integration. Our team can help you understand what your setup requires.
Is the DELTA Pro Ultra safe to use indoors?
Yes. It's certified to UL1973 (battery pack safety) and UL9540 (the safety standard for residential energy storage systems), carries an IP54 rating for dust and splash resistance, and includes a full battery management system with overvoltage, overcurrent, overtemperature, and short-circuit protection.
How quiet is it during operation?
Very quiet. In Online UPS mode, it delivers 0ms switchover to protect sensitive electronics, and for loads under 2,000W it runs at approximately 0dB — silent operation you won't notice, even overnight.
Can it run a central air conditioner or other high-draw appliances?
Yes. A single inverter delivers 7,200W of continuous output, enough for a 3-ton central AC unit along with other essential loads. For larger homes, pairing three inverters with an EcoFlow Smart Home Panel 2 unlocks up to 21,600W of total output.
What's covered under the 5-year warranty?
EcoFlow's 5-Year Limited Warranty covers manufacturing defects in both the inverter and battery units. As an authorized EcoFlow dealer, Renewable Outdoors also provides direct support if you ever need help with a warranty claim — call us at (303) 876-7654.
Does Renewable Outdoors offer financing or price matching?
Yes. We offer flexible financing options at checkout, and every DELTA Pro Ultra purchase is backed by our Lowest Price Guarantee — if you find a better price from another authorized dealer, call us at (303) 876-7654 before you order.
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