EcoFlow DELTA Pro Ultra 1x Inverter + 4x Battery

The EcoFlow DELTA Pro Ultra Inverter is a groundbreaking home energy solution that delivers unmatched flexibility, scalability, and cost efficiency compared to traditional solar battery systems. Designed for households seeking reliable, renewable, and future-ready power, it offers a seamless way to reduce dependence on the grid while ensuring uninterrupted energy security.

With a 7.2kW output per unit, scalable up to 21.6kW, the DELTA Pro Ultra can power even the most demanding appliances, including 4-ton central air conditioners. Starting with 6kWh of expandable storage and scaling up to an impressive 90kWh, it adapts effortlessly to the size and energy demands of your home—whether for everyday use, backup, or complete off-grid living.

The system integrates with the EcoFlow Smart Home Panel 2, enabling 20 ms auto-switchover for uninterrupted power and 12 customizable circuits for intelligent load management, giving homeowners precise control over their energy usage.

Harness solar power more efficiently with 5.6kW–16.8kW solar input, capable of generating up to one full day of energy from just one hour of sunlight. For extended outages, it also supports 3–12kW portable gas generators, ensuring round-the-clock reliability.

Built for the future of mobility, the PowerPulse EV Charger (9.6kW) integrates directly with the system, delivering up to 35 miles of driving range per hour of charging. With the DELTA Pro Ultra and Smart Home Panel 2, solar energy can be transformed into mileage for your EV, maximizing every watt of renewable energy.

Best of all, the system offers around 75% lower upfront costs compared to traditional solar battery systems, with a minimum payback period of just 2.5 years, making clean energy both practical and financially sustainable.

Product Features in Detail

Uninterrupted, Unlimited, and Ultra-Smart Power
The EcoFlow DELTA Pro Ultra and Smart Home Panel 2 are an intelligent whole-house energy system for extended outages. Featuring a 20 ms automatic switchover, it ensures an uninterrupted power supply. With an expandable capacity of up to 90kWh, an output of up to 21.6kW, and five different ways to refuel, the system adapts to diverse power backup needs, ensuring you never sacrifice living convenience.

Turn Sunlight and Off-Peak Power into Money Saved
DELTA Pro Ultra System seamlessly integrates with existing rooftop PV systems and flexible solar panels to achieve up to 16.8kW solar input. Through Time-of-Use (TOU) optimization, the system automatically prioritizes solar energy or off-peak grid electricity to run devices and charge batteries. During peak rate periods, it instantaneously switches to stored energy, minimizing expenses.

Modular Design – Power Every Home and Every Need
From small homes to large households, DELTA Pro Ultra delivers 7.2kW–21.6kW output and 6–90kWh capacity to conquer any energy demand. Run a 4-ton AC, charge EVs, or power 240V heavy loads—effortlessly. Grow your power as your life grows.

Stackable Design to Power Every Home
With a 7.2kW output, EcoFlow DELTA Pro Ultra effortlessly runs even energy-hungry household items, like a 4-ton central air conditioner.² For a larger home, pair 3 inverters with the EcoFlow Smart Home Panel 2 to unlock a massive 21.6kW AC output.

Stackable Design to Power Every Home
Starting with 6kWh, the system takes home power dependability to another level with up to 90kWh battery capacity, adapting to any household size or energy demands.

Ultra-powerful for whole-home backup
EcoFlow DELTA Pro Ultra automates disaster prep and outage survival—charging ahead of storms, seamless switching power in 20ms, and deploying auto backup priority, solar, generators and more to extend runtime on your terms. When the grid fails, nothing changes.

24/7 Storm Prep
Storm Guard sends a notification and automatically charges DELTA Pro Ultra to 100% capacity when severe weather is forecasted.

20 ms Seamless Transition
20 ms grid-to-backup, keeping lights on and no device reboots.

Solar Power Stays Active
Unlike other home battery systems, solar panels can still power your entire home through the DELTA Pro Ultra system even during outages.

Uninterrupted Power with a Generator
When the weather turns stormy, a seamless connection to the EcoFlow Smart Generator 4000 (Dual Fuel) or a 3kW or above portable gas generator ensures your home stays energized without a hitch.⁴

Refuel at EV Charging Stations
Using the EcoFlow EV X-Stream Adapter, get rapid 7200W charging from EV charging stations at home or on the road.

AI-Powered Energy Plans
The DELTA Pro Ultra’s AI analyzes your backup power needs and recommends the best energy-saving plan to stretch your power supply as long as possible.

Single-Circuit Control and Backup Priority Settings
Smart Home Panel 2 offers 12 customizable circuits with single-circuit control and backup power priority settings (e.g., keep the fridge running, limiting non-essentials). The system automatically extends backup time by efficiently managing energy use.

Free energy from various solar sources
A single DELTA Pro Ultra inverter has two PV input ports for a maximum 5.6kW solar input. Connect DELTA Pro Ultra with the Smart Home Panel 2 system for compatibility with existing rooftop PV systems. Connect three inverters for a monumental 16.8kW input, achieving a full day's home energy in as little as 60 minutes.

Add Storage to Rooftop Solar and Start Saving
Looking to add batteries to your solar roof? Connect your Smart Home Panel 2 with the main panel, and the system automatically charges the DELTA Pro Ultra Battery using solar energy. Utilize free energy to support your home's energy needs and maximize the power of your rooftop panels.
What's more, with the DELTA Pro Ultra system, there's no wasted energy while staying in the NEM 1.0/2.0 plan.

Buy Your Own Solar Panels
With its flexible plug-and-play design and unrivaled solar input, EcoFlow DELTA Pro Ultra allows you to tailor your solution to fit your energy needs. A single inverter has two PV input ports for a maximum solar input of 5.6kW. Connect three inverters for a monumental 16.8kW. Enjoy $0 electricity bills* on sunny days—let your solar panels do all the work!*

Reduce grid dependency and lower electricity costs
Self-Powered mode allows you to store solar energy and power your home once battery capacity exceeds the pre-set reserve. Rely on solar to power the entire home, reducing the need for grid electricity. Ideal for managing fluctuating energy prices, this decreases grid dependency, enhancing your energy freedom.

Set scheduled tasks to automatically charge batteries during off-peak evening hours and discharge during the day
Conditions can trigger automated tasks, such as weather or device battery levels.

3 Ways to Boost Money Saving
By charging during low-cost periods, topping up with solar energy, and automating tasks, reduce your reliance on expensive grid power.

Timed Circuits
Smart Home Panel 2 allows two timed circuits so you can schedule high-power devices (e.g., AC, pool pumps) to run during off-peak hours or to turn off high-power appliances to avoid standby power consumption (will be released in June).

EV Charging Made Smart
The EcoFlow PowerPulse EV Charger adapts to your charging needs by seamlessly syncing with the EcoFlow Smart Home Panel 2 or EcoFlow DELTA Pro Ultra.

Eco Mode
Automatically coordinates EV charging with your home's energy flow—utilises surplus solar power and battery during the day, switches to off-peak grid energy at night, and always maintains sufficient backup power reserves for emergencies while keeping daily appliances running.

Surplus Solar Only*
Excess solar energy is exclusively used to charge your car.
* For vehicle owners with solar systems.

Instant Charging
Your car begins charging immediately upon plugging into the charger.

AI-Powered Savings
The AI assistant analyzes your electricity habits and suggests smarter, cheaper ways to use energy.

Visualize Every Cent Saved
Every day, see exactly how much you’ve saved—turn those savings into your personal ‘investment fund’.

Share Your Wins
Brag about your savings! Share your cost-cutting achievements with one click and show off your ‘investment returns’.

2.5-Year Payback Period with Easy Installation
Compared with traditional residential energy storage systems, our solution offers 75% reduction in upfront costs. And it enables you to achieve a payback period that is more than 3 times faster.

Low Upfront Cost, High Return on Investment
DELTA Pro Ultra's plug-and-play design allows you to add more inverters/battery packs anytime without any secondary installation or extra fees. See more details in the table below.

Safety & Reliability
Engineered for peace of mind, DELTA Pro Ultra’s cutting-edge LFP battery withstands extremes—from freezing winters to relentless loads—with self-heating, advanced cooling, and SOC balancing tech. Backed by a 5-year shield, it safeguards your home silently, powerfully, always.

SOC Balancing Technology
Ensures balanced charging/discharging across all battery cells. Avoids the entire system shutting down when one battery is depleted. Prevents overheating and extends the battery lifespan.

EcoFlow X-Cooling
Our proprietary X-Cooling heat dissipation system enhances efficiency even when powering heavy loads around the clock. X-Cooling works to extend EcoFlow DELTA Pro Ultra's lifespan, backed by a 5-year warranty.

Boost Performance with BMS
Our state-of-the-art LFP tech and advanced battery management system (BMS) regulates vital data, ensuring the safety, longevity, and high performance of EcoFlow DELTA Pro Ultra.

Powers through the most challenging situations.
EcoFlow DELTA Pro Ultra tackles even the most grueling conditions. The battery automatically starts self-heating if the temperature is lower than 32℉, allowing the battery to run as normal. Whether it's extreme weather or freezing winters, this giant safeguards your power security, just like usual.

1. Payback Calculation Logic (California Example):
Daily solar generation: 5.6kWp system × 6 sun hours/day) × 0.8 = 26.88kWh/day.
Electricity rates:
Average rate: $0.30/kWh.
TOU peak/off-peak price differential: $0.30/kWh.
Daily savings:
Solar savings: 26.88kWh × 0.30 = $8.064
Battery TOU savings: 6kWh × 0.30 = $1.8
Total daily savings: $8+$1.8 = $9.864
Monthly savings: $9.863/day × 30 days = $295.92/month
Annual savings: $9.8/day × 365 days = $3600.36

2. A soft-starter may be needed if the air conditioner's LRA rating is not within 120A

3. Vehicle model and usage dependent

4. The EcoFlow AC Generator Charging Adapter is required to charge DELTA Pro Ultra using a generator

5. We support a comprehensive list of platforms for you to upload utility plans automatically after your consent (released in June)