3-4kWh home backup
Elite 400 vs F3800 Plus
Identical watt-hours, a $2,200 price gap. The difference is what the inverter can do and how far the system can grow.
Best for 240VAnker SOLIX F3800 Plus
Whole-home backup · Head-to-head
EcoFlow DELTA Pro 3 vs Anker SOLIX F3800 Plus: The 240V Home-Backup Decision
Two portable whole-home contenders. We compare 240V output, surge, solar input, expansion, and the installation details that decide the job.
Our pick · Best for heavy loads
Anker SOLIX F3800 Plus
The Anker SOLIX F3800 Plus is the stronger choice for heavy 240V loads: 6,000W continuous, 12,000W surge, and 3,200W of solar input. The EcoFlow DELTA Pro 3 is the better value and the easier unit to move, with 4,096Wh base capacity and a 48kWh expansion ceiling.
6.5WattBench
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Quick take
Which one fits your loads?
Choose EcoFlow if
DELTA Pro 3
- You want the most base capacity and the lowest cost per usable watt-hour
- You want a 113.5 lb unit instead of a 136.7 lb unit
- You need 2,600W of solar input and a 48kWh expansion path
Choose Anker SOLIX if
F3800 Plus
- You need 6,000W continuous for a subpanel or large well pump
- You want 3,200W of solar input
- You want the highest surge rating in the portable class
Specifications
The numbers side by side
Green marks the stronger figure in that row. A stronger spec is not automatically the better product for your loads.
| Spec | EcoFlow DELTA Pro 3 | Anker SOLIX F3800 Plus |
|---|---|---|
| Rated capacity | 4,096 Wh | 3,840 Wh |
| Usable (85%) | 3,482 Wh | 3,264 Wh |
| Continuous output | 4,000 W | 6,000 W |
| Surge | 8,000 W | 12,000 W |
| Chemistry | LiFePO4 | LiFePO4 |
| Weight | 113.5 lb | 136.7 lb |
| AC input | 1,800 W | 1,800 W |
| Recharge time | ~2.3 hr (1,800W) | <3 hr (1,800W) |
| Solar input | 2,600 W | 3,200 W |
| Expansion | 48 kWh | 53.8 kWh |
| Warranty | 5 years | 5 years |
| Street price | $2,799–$3,699 | $3,599 |
| Cost / usable Wh | $0.92 | $1.10 |
Manufacturer-published figures, checked November 2026. Usable energy uses our 85% rule. Green cells mark the stronger spec, not the better product for your loads.
WattBench score
How the two stations stack up
Weighted across six dimensions. The score is a starting point, not a verdict for your specific loads.
EcoFlow DELTA Pro 3 · 6.7/10Anker SOLIX F3800 Plus · 6.5/10
Capacity25%
Output20%
Portability15%
Recharge15%
Expandability10%
Value15%
Capacity 25%, output 20%, portability 15%, recharge 15%, expandability 10%, value 15%. Read the methodology.
The short version
The DELTA Pro 3 and F3800 Plus are the two most capable portable stations here. Both offer 120V/240V output, both expand beyond 48kWh, and both require a transfer switch or subpanel for a clean whole-home install.
The Pro 3 stores 4,096Wh and costs about $3,199. The F3800 Plus stores 3,840Wh and costs about $3,599. The Anker charges more for a bigger inverter and more solar input; the EcoFlow gives you more base energy for less.
240V output is the headline feature
A 120V station can run individual appliances through extension cords. A 240V station can feed a transfer switch or a subpanel, which is what makes a portable unit behave like a small home backup system.
Both units support 240V, but the F3800 Plus has substantially more headroom: 6,000W continuous and 12,000W surge versus 4,000W and 8,000W for the Pro 3. For a well pump, a dryer, or a subpanel with several circuits, the Anker is less likely to trip.
Capacity and expansion
The Pro 3's 4,096Wh gives about 3,482Wh usable; the F3800 Plus's 3,840Wh gives about 3,264Wh. The difference is small, but the Pro 3 is cheaper per usable watt-hour.
Expansion is where the systems diverge. EcoFlow takes the Pro 3 to 48kWh; Anker takes the F3800 Plus to 53.8kWh with six batteries. Both are whole-home numbers that cost far more than the base unit. Do not buy either for the expansion ceiling alone unless you have priced the batteries.
Solar input favors Anker
The F3800 Plus accepts 3,200W of solar; the Pro 3 accepts 2,600W. If you have a large ground mount or roof array, the Anker can absorb more of it.
For most portable setups, 1,200-2,000W of panels is already a lot of gear. The practical difference appears at the top end, not with a couple of 400W folding panels.
Weight, installation, and safety
The Pro 3 weighs 113.5 lb; the F3800 Plus weighs 136.7 lb. Neither is portable in the backpacking sense. Plan a permanent location and treat moving day as a two-person job.
A transfer switch, inlet box, and proper grounding are not optional. A 240V portable station can backfeed a panel if connected incorrectly, which is dangerous to utility workers and to anyone in the house. Use a licensed electrician for the install.
Which should you buy?
Buy the Pro 3 if you want the best balance of capacity, price, and weight, and your 240V loads fit within 4,000W continuous. It is the more sensible first whole-home station for many houses.
Buy the F3800 Plus if you have a large well pump, electric dryer, or subpanel that needs 6,000W, or if you are building a large solar array. The extra inverter and solar headroom are the reasons to pay more.
Runtime math
How long each station lasts
Same formula for both: rated capacity x 0.85, divided by the load. Real appliances cycle, so treat these as planning estimates.
| Load | Average draw | DELTA Pro 3 | F3800 Plus |
|---|---|---|---|
| Refrigerator (avg.) | 75 W | 46 hr | 44 hr |
| CPAP (no humidifier) | 40 W | 3.6 days | 3.4 days |
| Wi-Fi + laptop | 60 W | 2.4 days | 2.3 days |
| Microwave | 1,000 W | 3.5 hr | 3.3 hr |
| Space heater | 1,500 W | 2.3 hr | 2.2 hr |
Estimates use 85% of rated capacity and a constant average load. Real appliances cycle; a fridge's duty cycle and ambient temperature change the result. Run your own numbers.
FAQ
Questions buyers actually ask
Can either unit run a whole house?
Not a whole house at once. They can power selected circuits through a transfer switch or subpanel. Load management is still required, especially for 240V appliances.
Do I need an electrician?
Yes for a transfer switch, inlet box, or subpanel. Extension-cord setups are simpler but should still use properly rated cords and GFCI protection.
Which has more surge power?
The Anker F3800 Plus, at 12,000W versus 8,000W for the DELTA Pro 3.
Which is cheaper per usable watt-hour?
The DELTA Pro 3, at roughly $0.92 per usable watt-hour versus about $1.10 for the F3800 Plus.
Can I use solar and AC charging at the same time?
Both units support combined charging within their input limits. Check the manual for the exact maximum; the combined rate is not simply the sum of both ratings.
Before you buy
Check the current price and bundle.
Street prices move. The price band on this page is a research snapshot, not a live quote. Verify the current price, included accessories, and warranty terms at the merchant.