EcoFlow DELTA Pro 3 – Portable Power Station (Reference for Consideration)

As I continue evaluating electrical system options for the cargo trailer conversion, I am now considering a broader EcoFlow ecosystem that includes the
DELTA Pro 3 Portable Power Station, the EcoFlow Smart Generator 4000 (Dual Fuel), a 50‑amp shore power inlet, and a future solar charging setup (roof‑mounted or portable).
This post documents the DELTA Pro 3 as a potential core component of that system.

This page is for reference only. I have not selected this unit for the build, but I am documenting it here as a potential option worth evaluating.

Product Overview

The EcoFlow DELTA Pro 3 is a high‑capacity portable power station designed for home backup, off‑grid use, and mobile applications. It combines a large lithium iron phosphate (LFP) battery, inverter, charger, and distribution system into a single integrated unit.

Model: EcoFlow DELTA Pro 3 (UL9540 Certified)
Price: $3,199.00 (at time of reference)
Battery Capacity: 4096Wh (4kWh)
Battery Chemistry: LFP (Lithium Iron Phosphate)
Cycle Life: 4000+ cycles to 80% capacity
Output Power: 4000W continuous, 6000W with X‑Boost
Voltage: 120V / 240V split‑phase capable
Expandability: Up to 48kWh with additional batteries
Charging Methods: AC, solar, generator, EV charger, vehicle
UPS Function: 10ms transfer time

Additional Components Under Consideration

EcoFlow Smart Generator 4000 (Dual Fuel)

To support extended off‑grid use, I am also considering the
EcoFlow Smart Generator 4000 (Dual Fuel).
This generator integrates directly with the DELTA Pro 3 ecosystem and provides automatic or manual charging when solar or shore power is unavailable.

Dual Fuel: Gasoline or propane
Smart Charging: Automatically charges the DELTA Pro 3 when battery levels drop
High Output: Designed for fast, efficient charging
EcoFlow Integration: Controlled through the app or linked directly to the power station

50‑Amp Shore Power Inlet

I am leaning toward installing a 50‑amp shore power inlet on the trailer.
This would allow the DELTA Pro 3 to charge quickly from campground hookups or home power, while also providing a stable AC source for high‑demand appliances.

Solar Charging (Portable or Roof‑Mounted)

Solar will be part of the system, though I have not yet decided between:

Portable solar panels for flexible positioning and maximum sun exposure
Roof‑mounted solar array for convenience and continuous charging while parked

The DELTA Pro 3 supports high‑wattage solar input, so either option—or a combination—can be integrated.

Why This System Is Worth Considering

The DELTA Pro 3 ecosystem offers several advantages for a cargo trailer conversion, especially for a build that prioritizes simplicity, modularity, and safety.

Plug‑and‑play operation: No need to design or wire a full inverter/charger/battery system.
High output power: Capable of running HVAC, induction cooking, and other heavy loads.
Expandable capacity: Additional batteries can increase total storage up to 48kWh.
Multiple charging options: Shore power, solar, generator, EV charger, or vehicle alternator.
UL9540 certification: Provides a high level of safety for indoor installation.
Integrated generator support: The Smart Generator 4000 adds reliable backup charging.
Portable and removable: The system can be taken out of the trailer if needed.

Limitations to Keep in Mind

Recharge dependency: Solar, shore power, or a generator is still required for extended off‑grid use.
Cost: Higher upfront price compared to a DIY battery/inverter system.
Weight: Large portable units add significant weight to the trailer.
Integration limits: May not replace every component of a full RV electrical system.
Generator noise: Even efficient generators produce some noise during charging.

How This Could Fit Into the Trailer Build

If selected, the DELTA Pro 3 would serve as the primary power hub for the trailer.
The Smart Generator 4000 would provide backup charging, the 50‑amp shore inlet would support fast AC charging, and solar would maintain battery levels during daily use.

This approach simplifies the electrical system while still offering enough power for HVAC, appliances, and tools planned for the build.

Notes for Future Evaluation

Confirm output capacity aligns with HVAC and appliance requirements.
Evaluate total weight and placement inside the trailer.
Compare cost and flexibility against a traditional inverter + battery bank system.
Determine solar capacity and whether portable or roof‑mounted panels make more sense.
Review generator noise levels and fuel storage considerations.

This page will continue to evolve as I refine the electrical system design and evaluate the full EcoFlow ecosystem for the build.