The EcoFlow DELTA Pro Ultra is a next-gen power solution built for whole-home backup and off-grid living. With up to 21.6kWh expandable storage, 7.2kW output, and advanced LiFePO₄ battery technology, it delivers unmatched performance and reliability. This system supports 240V split-phase, smart load management, and real-time control through the EcoFlow app—making it ideal for both emergencies and daily use.
EcoFlow DELTA Pro Ultra review - A Powerful Whole-Home Backup Solution for the Conscious.
EcoFlow DELTA Pro Ultra review – A Powerful Whole-Home Backup Solution for your needs.
A Fast-Charging, Expandable Power Beast for Home & Outdoor Needs
The EcoFlow DELTA Pro Ultra is a next-generation, whole-home backup powerhouse. It is designed for ultimate energy security. Whether you’re preparing for extended outages or want true energy independence, or need dependable power for your entire house. This system delivers unmatched performance with a smart, scalable design.
It starts with 6.1 kWh of lithium iron phosphate battery storage per unit, and you can expand it up to a staggering 90 kWh by combining 3 inverters and 15 battery packs. That’s enough to power the essentials of a standard home for over 30 days during emergencies.
With 7.2kW – 21.6kW of output, dual 120V/240V support, and 16.8 kW of solar input, the DELTA Pro Ultra is perfect for anyone who wants a clean, silent alternative to gas generators. One that’s strong enough to run everything from your refrigerator and lights to your central air conditioner and EV charger.
This is more than a power station – it’s a full home energy system with smart features, fast recharge, and a whisper-quiet backup that works seamlessly during grid failures with 0 ms UPS.
Specifications
Battery Type: lithium iron phosphate battery
Capacity: 6.1 kWh
Expandable Capacity: Up to 90 kWh (3 inverters + 15 batteries)
Cycle Life: 3,500+ cycles to 80%
AC Output: 7.2 kW (single), up to 21.6 kW (system)
Surge Output: 10.8 kW
Solar Input: Up to 16.8 kW with 3 inverters
UPS Transfer Time: 0ms
Warranty: 5 years
Connectivity: Wi-Fi, Bluetooth, 4G
Weight: Inverter – 31.7kg,
Battery – 50.7kg
Noise Level: 0 dB (under 2000W load, up to 30 min)
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Dimensions:
Dimensions (Inverter): 27.2 × 18.9 × 8.4 in
Dimensions (Battery): 26 × 18 × 8 in
Charging Options:
- AC Wall Charging
- Solar Panel Charging (up to 16.8 kW)
- Hybrid (AC + Solar for max speed)
- Gas Generator
- EV Charging Pile
Charging Time:
- Charge two batteries in 2 hours at 8800W
- Solar: One hour of sun = one day of power (with full input)
Refund:
- 30-day refund from Amazon
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Key Features:
Whole-Home Power Output
With up to 21.6kW AC output, the DELTA Pro Ultra runs every appliance in your home — including EV chargers, central A/Cs, and heavy-duty tools. Using X-Fusion technology delivers a stable 7200W output per inverter.
Instant UPS Switching
0ms transfer time, your devices stay powered with no interruptions, ideal for sensitive equipment like computers, routers, and CPAP machines.
Scalable Battery System
Start with one unit and scale up to 90 kWh of battery storage. That’s a month-long peace of mind in blackout conditions.
Massive Solar Input
Get true off-grid independence with up to 16.8 kW of solar input, enough to fully charge your system in just 1 hour of sunlight (with 3 inverters).
Smart Home Integration
Works with the EcoFlow Smart Home Panel 2, allowing seamless, automatic switching from the grid to backup power.
Smart Control & Monitoring
Wi-Fi, Bluetooth, or 4G. Schedule charging, monitor usage, and optimize performance; you can manage all from your phone.
Whisper-Quiet Performance
Operates completely silently (0 dB) under light loads, with no noise at night while running essentials.
Pros and Cons
Pros
- Powers entire homes, including 240V appliances and AC units
- Expandable to 90 kWh – scalable for any home size
- Ultra-fast recharge options, including hybrid and EV pile
- Online UPS mode: 0 ms switching, no device disruption
- LiFePO₄ battery with 3,500+ cycles
- Modular, space-saving design
- Smart app control and real-time monitoring
- Silent indoor operation under light loads
- Safe for indoor use with zero emissions
Cons
- Heavy setup not ideal for frequent moving
- High initial investment (but long-term value)
- Smart Home Panel 2 installation requires professional help
- Learning curve for casual users
What’s in the Box
- EcoFlow DELTA Pro Ultra Inverter
- EcoFlow DELTA Pro Ultra Battery
- AC Charging Cable
- DC Output Cable
- Solar Charging Cable
- Connection Accessories
- User Manual
Optional: Smart Home Panel 2, Solar Panels (400W Rigid or Portable), Extra Batteries
How It Works / Usage Instructions
- Install the Smart Home Panel 2 (optional) to connect directly to your home’s circuits.
- Charge source: solar, AC, generator, or EV.
- Plug-in and power up appliances.
- Use the app to monitor energy use, set charging schedules, and get alerts.
- Expand with batteries or inverters as your needs to grow.
Compatibility
- Works with 120V & 240V appliances
- Compatible with EcoFlow’s 400W Rigid and Portable Solar Panels
- Compatible with existing rooftop solar (no inverter required)
- Smart Home Panel 2 supported
- Integrates with generator or EV chargers
Price and Value
Base configurations start around $5,799, with full systems (3 inverters, 15 batteries) ranging up to $19,000+ depending on setup.
Warranty and Support
- 5-Year Warranty included
- Additional support for Smart Home Panel installation
- Dedicated customer service via EcoFlow
Real Customer Reviews
Game changer for backup power.
“Silent at night, I didn’t even know the power was out.”
“Installation took a bit, but now I’m saving big on my energy bill.”
“Recharges crazy fast from solar. Great for long-term independence.”
Ideal For
- Homes
- Off-grid living
- Energy-conscious homeowners looking to reduce bills
- EV owners wanting backup
- Small business (IT, security, etc.)
Final Verdict
The EcoFlow DELTA Pro Ultra isn’t just a power station. It’s a fully customizable, ultra-reliable energy backup system for modern homes. Whether you need whole-house coverage during blackouts, want to slash energy costs, or are preparing for total off-grid independence, this is a top-tier solution built for power, safety, and silence.
If you’re looking for the best home backup power, this is it.
FAQs
Can it power my entire house?
Yes, up to 21.6 kW output and 90 kWh capacity are more than enough for full home use.
Is it noisy like a generator?
No, it operates silently under light loads (0 dB), and generally quieter than traditional gas generators.
Can I charge it with solar and AC at the same time?
Yes, hybrid charging allows maximum speed (up to 8800W).
Do I need to install solar panels?
Not required. You can charge from the grid or a generator, but solar enables true energy independence.
