EcoFlow DELTA Pro 3 vs Anker SOLIX F3800: 4kWh Home Backup Compared
Compare capacity, inverter output, solar input, weight and expansion of EcoFlow DELTA Pro 3 and Anker SOLIX F3800.
These are both large LFP systems aimed at home backup, but they emphasize different tradeoffs in output, portability and ecosystem design.
Both are large home-backup-oriented systems, but the F3800 emphasizes higher AC output while DELTA Pro 3 emphasizes a different balance of capacity, solar input and ecosystem integration. The better choice depends on the circuits and surge loads you actually need to support.
Specification snapshot
| Model | Capacity | AC output | Solar input | Weight | Shop |
|---|---|---|---|---|---|
| EcoFlow DELTA Pro 3 | 4,096 Wh | 4,000 W | 2,600 W | 113.54 lb | — |
| Anker SOLIX F3800 | 3,840 Wh | 6,000 W | 2,400 W | 132 lb | — |
Specifications linked to manufacturer sources in our power station database. Shopping links are marked as sponsored where applicable.
What matters
- DELTA Pro 3 lists 4,096Wh capacity and 4,000W continuous AC output.
- Anker SOLIX F3800 lists 3,840Wh capacity and 6,000W AC output.
- EcoFlow lists up to 2,600W solar input; Anker lists up to 2,400W.
- Both are heavy wheeled systems, so home integration and load requirements should drive the decision more than nominal portability.
Decision factors that change the answer
Inverter output
F3800 lists substantially higher AC output, which matters for larger simultaneous loads.
Battery capacity
Both are around the 4kWh class, so runtime is similar until expansion batteries are added.
Solar input
Higher solar-input capability shortens recovery time when the array is large enough.
Home integration
Transfer equipment, expansion batteries and ecosystem cost can matter more than a single headline watt figure.
Relevant examples from our tracked database
| Model | Capacity | AC output | Solar input | Weight | Shop |
|---|---|---|---|---|---|
| EcoFlow DELTA Pro 3 | 4,096 Wh | 4,000 W | 2,600 W | 113.54 lb | — |
| Anker SOLIX F3800 | 3,840 Wh | 6,000 W | 2,400 W | 132 lb | — |
This table is a model-level reference from our current source-linked database, not a claim that every model from either brand has the same characteristics. Sponsored shopping links do not change the specifications used in the comparison.
Worked example
At a 1kW average critical load, a roughly 4kWh battery with 85% usable AC energy provides around 3.3–3.5 hours before expansion or recharge. The output advantage matters when loads are larger than that average.
Choose based on the loads you must start and run, the transfer/home-panel ecosystem you intend to use, and expansion economics. Higher inverter wattage is not automatically better if your critical-load plan does not need it.
Check the underlying numbers
Use these site resources to replace generic assumptions with your own load or the source-linked data behind this guide.
Use the numbers before choosing a model
Start with your load list. The battery needs enough watt-hours for the desired runtime and enough continuous/surge watts to operate the appliances at the same time. Then check whether your recharge method can replace the energy you expect to consume.
For outage planning, we recommend keeping reserve capacity instead of designing a system that reaches 0% at the end of the forecasted outage.
Next step
Estimate battery runtime → or Build a critical-load energy budget →.