EcoFlow DELTA Pro 3 vs. Anker SOLIX F3800 (2026)

Side-by-Side Comparison

If you are still deciding whether a battery system is right for you at all, our generator vs. battery backup comparison breaks down the trade-offs between battery systems and gas generators. For a broader look at all five top systems including mid-range and entry-level options, see our Best Home Battery Backup Systems guide.

Power Output: Where the F3800 Wins

The most significant hardware difference between these two systems is continuous output. The Anker SOLIX F3800 delivers 6,000W of sustained power, while the EcoFlow DELTA Pro 3 delivers 4,000W with an additional 6,000W ceiling through X-Boost mode. That distinction matters because X-Boost works by reducing voltage to the appliance, which means heating elements may not run at full intensity. A 2,000W space heater will run under X-Boost, but it may produce slightly less heat than on a wall outlet. The F3800’s 6,000W is native, full-voltage output with no compromise.

In practical terms, 4,000W is enough for the vast majority of residential backup scenarios. It will run a central AC unit up to 3 tons, a well pump, a sump pump, a refrigerator, lights, and devices simultaneously. The F3800’s 6,000W headroom becomes meaningful if you want to run multiple high-draw appliances at the same time without worrying about hitting the ceiling, or if you have specific equipment that draws more than 4,000W sustained.

Charging Speed: Where the DELTA Pro 3 Wins

The DELTA Pro 3’s charging speed is its single biggest advantage. EcoFlow’s X-Stream technology pushes AC input to 3,600W, bringing the battery from empty to full in roughly 50 minutes. The F3800 takes approximately 1.5 hours for a full charge on AC power. That is a meaningful difference in an outage scenario where grid power returns briefly and you need to top off the battery before the next interruption.

For solar charging, the DELTA Pro 3 accepts up to 2,600W through dual PV ports (one high-voltage, one low-voltage), while the F3800 accepts up to 2,400W. In ideal conditions with a full solar array, the DELTA Pro 3 recharges from empty in about 2 hours versus roughly 2.5 hours for the F3800. The practical difference shrinks in real-world conditions with partial cloud cover, but the DELTA Pro 3 maintains a consistent edge.

Both systems support pass-through charging, meaning they can power your appliances while simultaneously recharging from solar or AC. This is essential for extended outage scenarios where you are running essential circuits and recharging at the same time. For a deeper explanation of how solar charging works with these systems, see our guide on how home battery backup systems work.

Expandability: Where the F3800 Wins

Both systems are expandable, but the F3800 has a higher ceiling. The Anker SOLIX F3800 scales to 53.8 kWh with expansion batteries, while the EcoFlow DELTA Pro 3 scales to 48 kWh. For context, a typical US home uses roughly 30 kWh per day. At full expansion, the F3800 could theoretically power a home for nearly two days without any recharging, and the DELTA Pro 3 could manage about a day and a half.

The more meaningful difference is the expansion approach. Each system uses proprietary expansion batteries that connect to the base unit, and neither is compatible with the other. The DELTA Pro 3 adds capacity in 4,096 Wh increments (one Smart Extra Battery per unit), while the F3800 uses BP3800 expansion batteries at 3,840 Wh each. Both expansion batteries cost roughly the same per watt-hour of added capacity.

For most homeowners, 48 kWh is more than sufficient. The F3800’s advantage here matters most if you are planning a large-scale system with multiple days of autonomy, or if you are building a system for a property with unusually high energy demands.

AC Coupling: The F3800’s Unique Feature

This is the feature that makes the F3800 meaningfully different from every other portable power station, including the DELTA Pro 3. AC coupling allows the F3800 to integrate directly with a grid-tied rooftop solar system. If you already have solar panels on your roof with a grid-tied inverter, the F3800 can charge from that existing installation without requiring separate, dedicated solar panels.

The DELTA Pro 3 does not support AC coupling. To charge it from solar, you need panels connected directly to its PV input ports. This means if you already have rooftop solar, you would need to either add separate panels for the DELTA Pro 3 or reroute some of your existing panels, which can be complicated and expensive.

If you do not have rooftop solar and are not planning to install it, this difference does not affect you. Both systems accept standalone solar panels through their PV input ports. But if you already have a grid-tied solar installation, the F3800’s AC coupling turns your existing rooftop panels into a battery charging source, which adds significant value and flexibility. It also enables daily energy cycling, where you store solar energy in the battery during the day and draw from it during peak rate hours, reducing your electricity bill even when the grid is functioning normally.

Weight and Portability

Neither of these systems is truly portable in the way that a suitcase-sized power station is portable. The DELTA Pro 3 weighs approximately 114 lbs and the F3800 weighs approximately 132 lbs. Both have wheels and handles for moving across flat surfaces, but getting either one into the bed of a truck or up a flight of stairs is a two-person job.

The 18-pound difference between them is noticeable. The DELTA Pro 3 is slightly easier to maneuver on its wheels, and the reduced weight makes a meaningful difference when positioning the unit in a garage, basement, or utility area. If you plan to leave the system in one location permanently, weight matters less. If you occasionally need to reposition it or bring it to a different property, the DELTA Pro 3’s lower weight is a real advantage.

App and Ecosystem

The EcoFlow app is more polished and feature-rich than Anker’s current offering. It provides real-time monitoring of charge levels, input and output wattage, and connected expansion batteries. The interface is clean, the historical data tracking is useful for understanding energy patterns, and the scheduling features add real value for peak shaving (charging during off-peak hours and discharging during peak rates). Both WiFi and Bluetooth connectivity are supported, with Bluetooth as a fallback for off-grid scenarios.

Anker’s SOLIX app handles the basics well but does not match EcoFlow’s level of polish. Monitoring, firmware updates, and basic controls work reliably. The storm-detection auto-charging feature in the Anker ecosystem is a nice touch that the EcoFlow app does not currently offer. However, the overall app experience and depth of analytics favor EcoFlow.

For home integration, EcoFlow’s Smart Home Panel 2 has more detailed documentation and a more established installation base. Anker’s Home Power Panel provides similar functionality (automatic switchover, app-based circuit management for up to 12 circuits), but installers may be less familiar with it. Either way, both panels require a licensed electrician for installation.

Battery Longevity

Both systems use LFP (lithium iron phosphate) cells, which are the most durable battery chemistry available in consumer power stations. The DELTA Pro 3 is rated for 4,000 charge cycles to 80% capacity, while the F3800 is rated for 3,000+ cycles to 80%. At one full cycle per day, the DELTA Pro 3 would maintain 80% capacity for roughly 11 years, and the F3800 for roughly 8 years. In practice, most homeowners will not cycle their battery daily, so real-world lifespan will likely exceed these figures for both systems.

The 1,000-cycle difference is worth noting but probably not decisive. Both warranties are 5 years, and both systems will comfortably outlast their warranty periods under typical home backup use.

Price and Value

The F3800 costs less at the base unit level despite offering higher continuous output and a larger expansion ceiling. The DELTA Pro 3 commands a premium that reflects its faster charging, lighter weight, and more mature ecosystem. Whether that premium is worth paying depends on which capabilities matter more to you.

The base unit price is only the starting point. Both systems require significant additional investment to reach their full potential. Expansion batteries, home integration panels, solar panels, and professional installation all add to the total cost. The long-term cost of ownership is comparable for both systems when you factor in the full ecosystem.

Which One Should You Buy?

For most homeowners buying their first whole-home battery backup system, the EcoFlow DELTA Pro 3 is the stronger recommendation. It does more things well (charging speed, app quality, weight, documentation) and costs less for the areas where most buyers will not notice the difference (4,000W vs. 6,000W output, 48 kWh vs. 53.8 kWh ceiling). The DELTA Pro 3 is the kind of product where you plug it in, connect the app, and the system mostly manages itself. You can read our full assessment in the EcoFlow DELTA Pro 3 review.

The Anker SOLIX F3800 is the right choice for a more specific buyer: someone who already has rooftop solar and wants AC coupling, someone who needs the absolute maximum power output, or someone who is building a large-scale system over time and wants the highest expansion ceiling available. The F3800 rewards a buyer who knows exactly what they need and is willing to work through slightly less polished documentation to get it. Our full assessment is in the Anker SOLIX F3800 review.

If both of these systems are more than you need, consider the mid-range and entry-level options in our Best Home Battery Backup Systems guide. The Jackery Explorer 2000 Plus and Bluetti AC200PL cover essential-circuit backup at significantly lower price points, and the EcoFlow DELTA 3 Classic offers the most affordable entry point in our lineup for buyers who need lightweight backup for shorter outages.

Frequently Asked Questions