Frequently Asked Questions

EcoFlow DELTA Pro FAQ

Explore expandable capacity, whole-home backup, charging options, output power, 240V support, certification, and the DELTA Pro lineup.

System Scalability & Expansion

The storage capacity is fully modular and expandable across the lineup. The classic DELTA Pro scales up to 25 kWh, the DELTA Pro 3 reaches up to 48 kWh, and the heavy-duty DELTA Pro Ultra series scales from 6 kWh up to 180 kWh using compatible extra batteries and stacked inverter configurations.

DELTA Pro: 3.6–25 kWh
DELTA Pro 3: 4–48 kWh
DELTA Pro Ultra: 6–90 kWh
DELTA Pro Ultra X: 12–180 kWh

Yes. Units like the DELTA Pro 3 and DELTA Pro Ultra are designed with high continuous and surge outputs. Depending on the configuration, the Ultra X can provide up to 36 kW across three paralleled units.

These systems can support demanding motorized appliances such as central air-conditioning systems, well pumps, refrigerators, and other high-startup-load equipment when properly configured.

Whole-Home Integration & Smart Accessories

To integrate compatible power stations into your home's electrical system, EcoFlow offers smart ecosystem accessories such as:

Smart Home Panel
Smart Gateway
Compatible automatic transfer equipment
Expansion batteries
Compatible solar charging equipment

These components can allow the backup system to respond automatically when grid power is interrupted, depending on the specific system configuration and installation.

Yes. Compatible systems can be managed through the EcoFlow app and compatible monitoring hardware such as PowerInsight.

Depending on the configuration, you can monitor solar generation, battery levels, system status, and energy consumption and use that information to optimize energy usage.

Charging Versatility

Depending on the model and available accessories, an EcoFlow DELTA Pro system can be recharged through multiple methods:

Standard AC wall outlets
Solar panel arrays
EV charging stations using compatible adapters
EcoFlow Smart Generators

These options provide flexibility for everyday charging, emergency backup, and off-grid applications.

Yes. Solar charging is supported across the DELTA Pro line, with solar input specifications varying by model.

The DELTA Pro Ultra X, for example, supports high-voltage solar input configurations. Always verify the manufacturer's current voltage and current requirements for the exact configuration before installation.

Each tier has compatible expansion batteries. This modular design allows additional storage to be added without replacing the base unit, subject to the model's expansion limits.

DELTA Pro: Up to 25 kWh
DELTA Pro 3: Up to 48 kWh
DELTA Pro Ultra: Up to 90 kWh
DELTA Pro Ultra X: Up to 180 kWh

DELTA Pro Series

The DELTA Pro series includes four tiers:

DELTA Pro
DELTA Pro 3
DELTA Pro Ultra
DELTA Pro Ultra X

Each tier increases available capacity and output capability. The lineup uses a modular approach with expandable batteries and solar charging support, while whole-home integration depends on the specific model and compatible accessories.

The appropriate system depends on the home's electrical loads, desired backup duration, available charging sources, installation requirements, and budget.

DELTA Pro: Entry-level option for essential circuits and smaller backup needs.
DELTA Pro 3: Designed for larger backup requirements and longer-duration outages.
DELTA Pro Ultra: Designed for larger whole-home backup configurations.
DELTA Pro Ultra X: Designed for very high-capacity residential and larger-scale applications.

Capacity & Output

Model	Capacity
DELTA Pro	3.6–25 kWh
DELTA Pro 3	4–48 kWh
DELTA Pro Ultra	6–90 kWh
DELTA Pro Ultra X	12–180 kWh

DELTA Pro: 3,600W base output
DELTA Pro 3: 4,000W from a single unit
DELTA Pro Ultra: 7.2–21.6 kW
DELTA Pro Ultra X: 12 kW per unit, up to 36 kW across three paralleled units

Yes. Compatible configurations support 240V output, with the available current rating varying by model.

DELTA Pro Ultra X: 240V / 50A
DELTA Pro Ultra: 240V / 30A
DELTA Pro 3: 120/240V at 16.7A

Verify the exact electrical specifications and installation requirements for the specific model before connecting permanent loads.

Certification

Certification varies by model and configuration.

The specifications provided identify the DELTA Pro 3 and DELTA Pro Ultra as carrying UL9540 certification.

The DELTA Pro Ultra is identified as carrying both UL1973 and UL9540 certification.

Certification and permitting requirements can vary by location. Confirm current manufacturer documentation and local requirements before installation.

Important: Product specifications, certifications, supported accessories, capacity limits, charging inputs, and electrical ratings may vary by model, configuration, firmware, and market. Confirm the current manufacturer's specifications before purchase or installation. Permanent whole-home electrical connections should be completed by a qualified electrician.

System Scalability & Expansion

How far can I expand the storage capacity?

The storage capacity is fully modular and expandable across the lineup. The classic DELTA Pro scales up to 25kWh, the DELTA Pro 3 reaches up to 48kWh, and the heavy-duty DELTA Pro Ultra series scales anywhere from 6kWh all the way up to a massive 180kWh using smart extra batteries and stacked inverter units.

Can these systems handle high-surge appliances?

Yes, units like the DELTA Pro 3 and DELTA Pro Ultra are built with high continuous and surge outputs (up to 36kW on the Ultra X), ensuring they can effortlessly start and run demanding motorized appliances like central air conditioning units, well pumps, and refrigerators simultaneously.

Whole-Home Integration & Smart Accessories

What hardware is needed for seamless whole-home backup?

To integrate these power stations directly into your house wiring, EcoFlow offers smart ecosystem accessories like the Smart Home Panel, Smart Gateway, and automated transfer switches. These allow the system to automatically kick in during a grid outage with virtually zero downtime.

Can I monitor and manage my energy usage remotely?

Yes, systems can be managed via the EcoFlow app alongside physical monitoring hubs like the PowerInsight monitor, allowing you to track solar generation, battery levels, and optimize energy usage to cut down on monthly utility costs.

Charging Versatility

What are the different ways to recharge an EcoFlow DELTA Pro system?

You can recharge your system through multiple channels: standard AC wall outlets, EV station charging adapters, solar panel arrays, or dual-fuel Smart Generators for extended off-grid emergencies where sunlight is unavailable.

What's actually in the "DELTA Pro series"?

Four tiers, in order of scale: DELTA Pro (the original, entry-level whole-home unit), DELTA Pro 3, DELTA Pro Ultra, and DELTA Pro Ultra X. Each steps up in capacity and output, but they share the same core design: expandable batteries, whole-home backup capability, and solar charging support.

Which one is right for a typical home backup customer?

For essential circuits over a day or so, DELTA Pro is the entry point. EcoFlow positions DELTA Pro 3 for longer outages — "1 day to a week" of home power. DELTA Pro Ultra and Ultra X are built for full whole-home coverage, with Ultra X scaling into commercial territory.

Capacity and output

DELTA Pro — 3.6–25kWh

DELTA Pro 3 — 4–48kWh

DELTA Pro Ultra — 6–90kWh

DELTA Pro Ultra X — 12–180kWh

What's the difference in output power?

DELTA Pro — 3,600W base output

DELTA Pro 3 — 4,000W from a single unit

DELTA Pro Ultra — 7.2–21.6kW

DELTA Pro Ultra X — 12kW per unit, up to 36kW across three paralleled units

Can these run 240V appliances?

Yes — all four support 240V output, with the current rating scaling by model: DELTA Pro Ultra X is rated 240V/50A, DELTA Pro Ultra 240V/30A, and DELTA Pro 3 120/240V at 16.7A.

Certification

Are any of these UL-certified?

Yes. DELTA Pro 3 and DELTA Pro Ultra both carry UL9540 certification. DELTA Pro Ultra currently stands alone in the line as certified to both UL1973 and UL9540 — worth calling out specifically for customers in jurisdictions where that dual certification affects permitting or insurance.

Charging

Can these charge from solar panels?

Yes — solar charging is supported across the DELTA Pro line. DELTA Pro Ultra X, for example, accepts 80–500V solar input at up to 15A RMS across two separate inputs, letting it use higher-voltage panel strings.

How do I add more capacity later?

Each tier has its own expansion battery. That modular design is exactly what lets a DELTA Pro 3 go from 4kWh up to 48kWh, or a DELTA Pro Ultra go from 6kWh up to 90kWh, without replacing the base unit.