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Anker SOLIX F3800 vs EcoFlow DELTA Pro Ultra: Value All-in-One or Modular System?
Quick Answer
Short answer: the F3800 is the best-value way to back up a home; the DELTA Pro Ultra is the start of a much bigger system. Anker's SOLIX F3800 ($2,199.99) packs 3,840Wh and 6,000W of split-phase output into one unit and expands to 26.9kWh with extra batteries. EcoFlow's DELTA Pro Ultra begins at $5,198 (inverter plus one battery) with 7,200W per inverter and a 90kWh ceiling. Buy the Anker for most homes; buy the EcoFlow when you are building toward serious storage.
Buy the Anker SOLIX F3800 if…you want whole-home essentials backup for the least money — one unit, 240V output for pumps and dryers, and room to grow to 26.9kWh.
Buy the EcoFlow DELTA Pro Ultra if…you plan to scale past 27kWh, want up to 21.6kW of output, or need IP54 hardware for a garage or covered outdoor install.
Spec Comparison
| Spec | Anker SOLIX F3800 | EcoFlow DELTA Pro Ultra |
|---|---|---|
| Starting price | $2,199.99 | $5,198 (inverter + 1 battery) |
| Base capacity | 3,840Wh | 6,144Wh per battery |
| Maximum capacity | 26.9kWh (6 expansion batteries) | 90kWh (15 batteries, 3 inverters) |
| Continuous output | 6,000W (12,000W with two units) | 7,200W per inverter (21.6kW with 3) |
| Solar input | 2,400W max | Up to 16.8kW (three-inverter system) |
| Output voltage | 120V/240V split phase | 120V/240V |
| Form factor | Single all-in-one unit | Separate inverter + stackable batteries |
Where the Anker Wins
- Price, by a lot. At $2,199.99 the F3800 costs less than the EcoFlow inverter alone ($2,799) — before EcoFlow batteries.
- Real 240V from one box. 6,000W of split-phase output runs well pumps, dryers, and mini splits that 120V-only stations cannot touch.
- Fast solar charging. 2,400W of solar input refills the base unit quickly and keeps expansion batteries fed.
- Simple growth. Add up to six BP3800 expansion batteries (26.9kWh total) or a second F3800 for 12,000W.
Where the EcoFlow Wins
- Scale. 90kWh and 21.6kW ceilings versus the Anker's 26.9kWh and 12kW — a different class of system.
- Per-step capacity. Each battery adds 6,144Wh, versus smaller steps on the Anker side.
- Install-grade hardware. IP54 ratings and a component design meant to live in a garage as permanent infrastructure.
The Bottom Line
The F3800 covers the large majority of home-backup needs — essentials plus a 240V circuit or two — for roughly 40% of the EcoFlow's starting price, and it still grows to 26.9kWh. Choose the DELTA Pro Ultra when your plan genuinely exceeds that: a big home, a workshop, or an off-grid build. Compare both in our power stations collection.
Prices checked November 6, 2026 at Renewable Outdoors — an authorized dealer with a Lowest Price Guarantee and financing through Affirm at checkout. Shop the Anker SOLIX F3800 or build a DELTA Pro Ultra system
Frequently Asked Questions
Can the Anker F3800 run 240V appliances?
Yes. The F3800 outputs 120V/240V split phase at 6,000W, so it can run 240V loads like well pumps, dryers, and many mini splits — the main reason it is compared with whole-home systems like the DELTA Pro Ultra.
How much can the F3800 expand?
Up to 26.9kWh with six BP3800 expansion batteries, and two F3800 units can pair for 12,000W of output. The DELTA Pro Ultra expands further — to 90kWh across three inverters — which is its main advantage.
Why does the DELTA Pro Ultra cost so much more to start?
It is sold as components: a $2,799 inverter plus $2,399 batteries, and a working system needs at least one of each ($5,198). That buys a modular platform with a 90kWh ceiling, IP54 hardware, and up to 21.6kW of output — capacity the all-in-one F3800 is not designed to reach.
Which is better for an RV or cabin?
The F3800. It is a single self-contained unit with 240V output, it costs far less, and its 3,840Wh base capacity suits part-time properties. The DELTA Pro Ultra's modular stack makes more sense as permanent home infrastructure.
