EcoFlow DELTA Pro vs Anker SOLIX F3800: which should you buy?
Choose the EcoFlow DELTA Pro for lower weight and more rated cycles. Choose the Anker SOLIX F3800 for a lower list price, more watt-hours per dollar, more capacity and more AC output. Only the Anker SOLIX F3800 meets our requirements for UPS use with computers and routers.
Where can you buy each one?
How do the EcoFlow DELTA Pro and Anker SOLIX F3800 specs compare?
A dot marks the better figure where the two differ by 5% or more. Sources: EcoFlow and Anker SOLIX official pages, checked 2026-10-12.
| EcoFlow DELTA Pro | Anker SOLIX F3800 | |
|---|---|---|
| Capacity | 3,600 Wh | 3,840 Wh |
| AC output | 3,600 W | 6,000 W |
| Surge | 7,200 W | 9,000 W |
| Weight | 99 lb | 132.3 lb |
| Solar input | 1,600 W | 2,400 W |
| Rated cycles | 3,500 | 3,000 |
| AC charging | 1,800 W | 1,800 W |
| UPS switchover | Not published | 20 ms |
| List price | $2,399 | $2,199.99 |
| Wh per list $ | 1.50 | 1.75 |
| Chemistry | LiFePO4 | LiFePO4 |
| Expandable | Yes | Yes |
| AC outlets | 5 | 8 |
Which one runs your appliances longer?
Calculated from each battery's rated capacity at 85% inverter efficiency, one appliance at a time from a full charge.
How do the two compare at a glance?
How long does each one run common appliances?
Both run the same set of appliances; capacity decides how long. Runtimes are one appliance at a time from a full charge.
| Appliance | EcoFlow DELTA Pro | Anker SOLIX F3800 |
|---|---|---|
| Wi-Fi router / modem | 6.4 days | 6.8 days |
| CPAP with heated humidifier | 2.3 days | 2.4 days |
| Refrigerator | 46 h | 2.1 days |
| Chest freezer | 3.9 days | 4.2 days |
| TV | 26 h | 27 h |
| Laptop | 2.6 days | 2.7 days |
| Starlink Standard kit | 31 h | 33 h |
| Microwave oven | 3.1 h | 3.3 h |
| Electric kettle | 2.0 h | 2.2 h |
| Window air conditioner | 4.2 h | 4.5 h |
| Space heater | 2.0 h | 2.2 h |
| Well pump | 3.1 h | 3.3 h |
| Check price | On Amazon | On Amazon |
Which uses does each one qualify for?
The EcoFlow DELTA Pro meets our requirements for 6 of 12 uses and the Anker SOLIX F3800 for 7. Each list's thresholds are explained on its page.
Which one recharges faster from solar?
At their limits, the EcoFlow DELTA Pro refills in about 2.2 hours of strong sun and the Anker SOLIX F3800 in about 1.6. With smaller arrays the bigger battery takes longer.
Which costs less over its rated life?
The EcoFlow DELTA Pro does: about $0.19 per kWh of rated lifetime storage against $0.19.
| EcoFlow DELTA Pro | Anker SOLIX F3800 | |
|---|---|---|
| List price | $2,399 | $2,199.99 |
| Rated cycles | 3,500 | 3,000 |
| Lifetime energy | 12,600 kWh | 11,520 kWh |
| Cost per lifetime kWh | $0.19 | $0.19 |
| Check price | On Amazon | On Amazon |
Rated cycles are each maker's figure under its own test conditions, and capacity fades with age, so treat this as a comparison between the two, not a forecast.
How long does each last at a steady load?
At the same steady draw, the bigger battery lasts proportionally longer, until a load passes the smaller inverter's limit.
Which one recharges faster from the wall?
Wall charging decides how quickly you are ready again between outages or trips.
- EcoFlow DELTA Pro: accepts up to 1,800 W from the wall and is rated to refill in about 162 minutes.
- Anker SOLIX F3800: accepts up to 1,800 W from the wall.
How does each rank within its own size band?
A head-to-head can hide that both models are strong or weak for their size. The EcoFlow DELTA Pro is ranked among 3,000 Wh and up models and the Anker SOLIX F3800 among 3,000 Wh and up models.
| Spec | EcoFlow DELTA Pro | Anker SOLIX F3800 |
|---|---|---|
| Capacity | 7th of 14 | 4th of 14 |
| AC output | 5th of 14 | 2nd of 14 |
| Surge | 5th of 14 | 2nd of 14 |
| Solar input | 7th of 14 | 5th of 14 |
| AC charging | 3rd of 13 | 3rd of 13 |
| Rated cycles | 9th of 11 | 10th of 11 |
| Weight | 9th of 14 | 12th of 14 |
| UPS switchover | — | 9th of 12 |
| Wh per list $ | 9th of 14 | 7th of 14 |
| Check price | On Amazon | On Amazon |
Can either one cover CPAP nights or go on a plane?
For a CPAP with a heated humidifier at ResMed's typical 56.1 W, the EcoFlow DELTA Pro covers about 6.8 eight-hour nights and the Anker SOLIX F3800 about 7.3. Neither can fly: both are over the FAA's 160 Wh limit for passenger aircraft.
Without the humidifier a CPAP draws far less, so nights stretch well beyond these figures. See CPAP runtimes and flying with a power station.
Which one is easier to carry?
The EcoFlow DELTA Pro is lighter by 33.3 lb. Watt-hours per pound shows which packs more battery for the weight.
- EcoFlow DELTA Pro: 99 lb, 36 Wh per pound, 25 × 11.2 × 16.4 in.
- Anker SOLIX F3800: 132.3 lb, 29 Wh per pound, 27.6 × 15.3 × 15.6 in.
What do they share, and what isn't published?
They match on AC charging speed, so those specs won't decide it. Not published: UPS switchover (EcoFlow DELTA Pro). Missing figures are never estimated, so a use that depends on one counts as unconfirmed.
Which should you pick for your use?
Where only one of them qualifies, the choice is made for you:
- Power stations that work as a UPS for computers and routers: the Anker SOLIX F3800, because only it meets UPS switchover ≤ 30 ms.
When should you buy neither?
If one spec matters most, a similar-size model may beat both on it:
- Capacity: the EcoFlow DELTA Pro 3 (4,096 Wh) beats both.
- Solar input: the Anker SOLIX F3800 Plus (3,200 W) beats both.
- AC charging: the Jackery HomePower 3600 Pro Max (4,000 W) beats both.
- Rated cycles: the Jackery HomePower 3600 Plus (6,000) beats both.
- Weight: the BLUETTI Elite 300 (58 lb) beats both.
- Wh per list $: the BLUETTI Elite 400 (2.74) beats both.
Related
How this page was made. Specs come from each manufacturer's official US spec page or manual, checked on the date shown; specs a manufacturer doesn't publish are marked "Not published". Runtimes are calculated (capacity × 85% inverter efficiency ÷ appliance draw), not measured. We haven't hands-on tested these units. Method and sources · Affiliate disclosure