EcoFlow Delta Pro Ultra vs Anker Solix F3800: Which is Better?

Aug 12, 2025

Need a Portable Power Station that won’t leave you powerless when it matters? Short answer: EcoFlow Delta Pro Ultra wins for lifespan, Anker Solix F3800 for modular speed. But there’s more—surprises, specs, and quirks ahead that could flip your choice. Keep reading before you plug in.

Core Performance Specifications of EcoFlow Delta Pro Ultra vs Anker Solix F3800

Battery Capacity and Expandability

The EcoFlow Delta Pro Ultra uses LiFePO4 battery chemistry, offering enhanced safety, longer cycle life, and better thermal stability.
It can expand up to 90 kWh with additional batteries.

The Anker Solix F3800 has a large capacity with modular batteries, expandable to 122.4 kWh.
Its battery chemistry differs from LiFePO4, but offers strong performance for heavy users.

EcoFlow portable power station with dual battery modules on a white background.

Continuous Power Output and Surge Capacity

EcoFlow delivers 3,600 W continuous AC output with a 7,200 W surge capacity.
This makes it well suited for heavy-duty applications.

Anker offers slightly lower surge capacity at 5,000 W.
It still handles demanding appliances effectively.

AC and Solar Charging Speeds

EcoFlow supports up to 3,400 W AC input, charging from 0–80% in around 45 minutes.
It also supports up to 4,000 W solar input.

Anker charges from 0–80% in roughly 45 minutes with a 2,400 W AC input.
It supports up to 2,400 W solar charging.

Home Integration and Usability

Smart Home Panel and Automatic Transfer

EcoFlow integrates with smart home systems for automation and remote control.
It can be paired with EcoFlow’s Smart Home Panel for automatic switchover during outages.

Anker also supports smart home integration, offering flexible options for connecting to household systems.

240V Split-Phase Functionality

Both units can deliver 240 V split-phase power for larger appliances.
EcoFlow’s higher surge capacity makes it more capable for devices with high start-up loads.

Physical Dimensions and Portability

Both feature rugged designs and intuitive controls.
EcoFlow is slightly bulkier, focusing on maximum capacity.
Anker’s modular design can be easier to move in smaller sections.

EcoFlow portable power station with single battery module on a white background.

EcoFlow Delta Pro 3 vs Ultra: Portable Power Showdown

The EcoFlow Delta Pro 3 and Delta Pro Ultra both target serious home backup and off-grid use, and share solar charging, a wide range of outlets, 240V output, Smart Home Panel 2 integration and UPS functionality with fast transfer speeds. The article frames the Delta Pro 3 as the portable powerhouse, quoting 7,200W peak output, a 3,600Wh base capacity and expansion to around 25kWh, and frames the Delta Pro Ultra as the whole-home backup solution, comparing base capacity, maximum expandability, low and high voltage solar input and physical footprint. Its recommendation is to choose the Delta Pro 3 if you want maximum power and scalability in a unit you can still move, and the Ultra if a permanent household backup system is the priority, weighing the higher price against long-term value.

In-Depth Feature Comparison

Key Differentiators and User Experience

The ability to charge while outputting 240V

EcoFlow supports pass-through charging while delivering 240 V output.
This allows uninterrupted power to appliances.

Anker also offers dual-voltage operation, though with a different approach to simultaneous charging and output.

System design (all-in-one vs. separate inverter/battery)

EcoFlow’s design integrates the inverter and battery into a single, cohesive unit.
Expansion batteries connect seamlessly.

Anker’s modular approach allows the inverter and batteries to be configured separately.
This offers flexibility in system layout.

Power output stability under heavy load

EcoFlow’s inverter efficiency of up to 95% helps maintain stable output during prolonged use.

Anker’s efficiency is around 90%.
This is still solid but results in slightly higher energy loss over time.

Pricing and Value

Base unit cost

EcoFlow Delta Pro Ultra: around £3,499 with a 10-year warranty.

Anker Solix F3800: around £3,999 with a 5-year warranty.

Cost of accessories (e.g., smart panels, extra batteries)

EcoFlow’s expansion batteries and accessories include solar panels, mounts, and cables.

Anker’s accessories include modular batteries, additional solar panels, and carrying cases.

EcoFlow portable power station with dual battery modules and solar panels on a white background.

EcoFlow Delta Pro vs Delta Pro 3: Comprehensive Comparison

The EcoFlow Delta Pro 3 improves on the original Delta Pro in most areas. Output rises from 3,600W to 4,000W, capacity increases to 4,480Wh, and it charges from empty to 80 per cent in about 65 minutes rather than 80. Both units weigh roughly 45 to 48kg and can be expanded with extra batteries to around 25kWh, and both work with EcoFlow's Smart Home Panel. The Pro 3 adds dual 120V/240V output, quieter operation, a better app experience and next-generation inverter and battery technology. The original Delta Pro remains a sound, cheaper choice for casual users, while the Delta Pro 3 suits serious off-grid use and anyone building a future-proof home backup system.

EcoFlow Delta Pro 3 vs Anker Solix F3800: Which Portable Power Station is Best?

The EcoFlow Delta Pro 3, at around £2,499, delivers 4,000W of continuous output from a 4,096Wh LiFePO4 battery and recharges from the mains in roughly 1.5 hours. The Anker Solix F3800, at around £2,799, provides 3,840W and 3,840Wh, takes about 2.4 hours to charge, and offers a wider selection of ports. The Delta Pro 3 weighs 46kg to the Anker's 48kg, and the two differ in layout, with one upright and one horizontal. Both support solar input, 120V/240V output, smart panel or transfer switch integration and UPS operation, and the Anker can reach 6,000W when paired for 240V. The Delta Pro 3 wins on modularity and price; the Solix F3800 justifies its premium with more headroom and connectivity for demanding users.

Which Power Station is Right for You?

Choose the EcoFlow Delta Pro Ultra If…

You need maximum power output and capacity

With 3,600 W continuous and 7,200 W surge, it handles high-demand appliances easily.

You require seamless 240V pass-through charging

Its ability to output full 240 V while charging makes it ideal for uninterrupted backup power.

Your primary use is as a whole-home backup system

The large expandability, LiFePO4 battery, and smart home integration make it well suited for long-term home use.

Choose the Anker Solix F3800 If…

You prioritise fast charging and a more portable form factor

Its modular design allows easier transport and setup, while still charging rapidly.

Your use case requires 120V/240V output at the same time

Dual-voltage capability supports diverse appliance types without reconfiguration.

You are looking for a potentially lower entry price point

While the base unit cost is slightly higher, certain configurations can be more cost-efficient for smaller setups.

Other Content You Might Like:

Phil McEleney

Get to know me

Started CamperNation to make buying caravan and glamping gear feel simple, honest, and stress-free. Now helps customers daily with awnings, power solutions and outdoor setups. Usually found talking canvas, campsites, and why the kettle is the most important piece of kit.

Back to Portable Power Stations Blog