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Anker SOLIX F3800 Plus Review: The Most Muscle in Its Class
By Justin · Updated September 25, 2026
The F3800 Plus's headline number is 6,000 watts of continuous output at 120/240V. That's 50% more than the EcoFlow DELTA Pro 3, and it's enough to start and run loads that make most power stations shut down. It pairs that with a 3,840Wh battery and the option to expand to about 26.9kWh on one unit, or double that with two.
The catch is that more output doesn't mean more energy. Those 6,000 watts come from the same size battery, so the heavy loads it can run will drain it quickly.
Buy it if you need to run bigger 240V loads (a well pump, a mini-split, shop tools, occasionally a dryer), you want to hook it to a transfer switch, and you plan to add expansion batteries or solar over time.
Skip it if you mostly need the essentials. The DELTA Pro 3 has more capacity, charges faster from the wall, and weighs about 20 pounds less.
F3800 Plus Specs at a Glance
| Spec | Anker SOLIX F3800 Plus |
|---|---|
| Capacity | 3,840Wh, LiFePO4 |
| Cycle life | 3,000+ cycles to 80% |
| AC output | 6,000W continuous at 240V (L14-30R). 120V outlets up to 2,400W each |
| Outlets | L14-30R (120/240V), TT-30R (RV), 120V household outlets, USB-C, USB-A |
| AC charging input | 1,800W |
| Solar input | 3,200W (two 1,600W high-voltage inputs) |
| Generator charging | Supported |
| UPS switchover | 20 ms |
| Expansion | About 26.9kWh per unit (6 expansion batteries), about 53.8kWh with two units |
| Weight | About 137 lbs |
| Size | 27.6 × 15.3 × 15.6 in |
| Warranty | 5 years |
Specs from Anker SOLIX as of September 2026.
What I Like
6,000 watts changes what you can run
Most home batteries top out at around 4,000W, which is fine for fridges and lights but gets tight once a well pump or a big compressor starts. At 6,000W, the F3800 Plus can handle a 240V well pump, a mini-split, or a mix of kitchen and essential loads at the same time with room to spare. Owners report running fridges, freezers, internet and window AC units together.
Built for a transfer switch
The L14-30 outlet connects to a standard generator inlet box and transfer switch or interlock, the same hardware you'd use for a portable generator, with no special adapter needed. If you already have that set up for a generator, the F3800 Plus can plug right into it.
Lots of room to grow
You can add up to six expansion batteries to one unit for roughly 26.9kWh, or link two units for about double that. Owners like being able to start with one unit and add more as the budget allows. That's the path to a real whole-home battery without a permanent wall install.
Fast solar charging
3,200W of solar input is among the highest in this class. With a full array and good sun, you can refill most of the battery in an afternoon. That matters a lot in a multi-day outage.
Solid build
Owners consistently praise the build quality, and Anker backs it with a 5-year warranty. It also has a UPS mode with a 20 ms switchover, which keeps most electronics running through a grid drop.
What I Don't Like
It's the heaviest one here
About 137 pounds. It has wheels and a handle, but owners recommend two people for setup, and I agree. Once it's in place, you won't want to move it often.
Slower wall charging than rivals
The AC input is 1,800W, so a full recharge from the wall takes roughly 2.5 hours by my math. The DELTA Pro 3 gets to 80% in about 50 minutes. That's not a big deal if you're recharging overnight, but it matters if you're trying to top up during a short window of grid power.
It's expensive, and so are the add-ons
The base unit is a big purchase, and owners often say the expansion batteries and Anker's solar panels are overpriced. You don't have to buy Anker's panels. Any compatible panels within the voltage specs will work.
A few units arrive with problems
A small number of owners report units that arrived completely dead or wouldn't charge past 0%. Charge it fully and test it with a real load as soon as it arrives, while you can still return it easily.
How Long Will It Run Your House?
Plan on about 85% of the 3,840Wh reaching your appliances after inverter losses, or about 3,260Wh.
| What's running | Average draw (approx.) | F3800 Plus runtime |
|---|---|---|
| Internet + phones + a few LED lights | 75 W | About 43 hrs |
| Fridge + chest freezer + internet + lights | 300 W | About 11 hrs |
| Above + gas furnace blower (cycling) | 550 W | About 6 hrs |
| Window AC (10,000 BTU) running | 1,000 W | About 3 hrs |
| Electric dryer (240V) running | 5,400 W | About 35 min |
So yes, it can run a dryer, but a single load will use most of the battery. The 6,000W is for starting and running big loads briefly, not for keeping them on all day.
F3800 Plus vs DELTA Pro 3
| Anker F3800 Plus | EcoFlow DELTA Pro 3 | |
|---|---|---|
| Capacity | 3,840Wh | 4,096Wh |
| Continuous output | 6,000W | 4,000W |
| Solar input | 3,200W | 2,600W |
| AC charging | 1,800W input (~2.5 hrs) | ~50 min to 80% |
| UPS switchover | 20 ms | 10 ms |
| Max expansion (one unit) | ~26.9kWh | ~12kWh |
| Weight | ~137 lbs | ~114 lbs |
Pick the Anker for more output and more room to expand. Pick the EcoFlow for faster wall charging, a lighter unit, and slightly more capacity out of the box.
Battery or Generator?
For the price of an F3800 Plus, you could buy a Westinghouse WGen11500TFc that runs your house on natural gas indefinitely. The battery's advantages are that it's silent, safe indoors, instant, and needs no fuel. Many people end up with both. The battery covers short outages and nights, and the generator recharges it during long ones.
Questions People Ask
Can the Anker F3800 Plus run a whole house?
It can power the circuits on a transfer switch, but 3.84kWh won't last long with heavy loads. With expansion batteries and solar, it gets much closer to whole-home backup.
Does it do 240V?
Yes, up to 6,000W at 240V through the L14-30 outlet.
How many expansion batteries can I add?
Up to six on one unit, for about 26.9kWh. Linking two units doubles the system to about 53.8kWh.
Is it a UPS?
It has a UPS mode with a 20 ms switchover, which keeps most electronics running when the grid drops.
How I Put This Review Together
I haven't run this unit myself. This review is based on Anker's published specs, what owners report after using it, and the runtime math. If I get one in to test, I'll add my own numbers here.
Bottom Line
The F3800 Plus is the one to get if output is what you need most. 6,000W at 240V, big solar input, and room for a lot of expansion make it the strongest single power station in its class. Just remember it's a 3.84kWh battery. It can start big loads easily, but it can't run them for long unless you add capacity or solar panels.