3-4kWh home backup
Elite 400 vs DELTA 3 Ultra Plus
One is a watt-hour bargain; the other is a more capable home-backup platform. The right answer depends on whether your loads are large or long.
Best capacity per dollarBluetti Elite 400
3-4kWh home backup · Head-to-head
Bluetti Elite 400 vs Anker SOLIX F3800 Plus: Same Capacity, Different Class
Identical watt-hours, a $2,200 price gap. The difference is what the inverter can do and how far the system can grow.
Our pick · Best for 240V
Anker SOLIX F3800 Plus
The Bluetti Elite 400 is the value pick: the same 3,840Wh for about 60% less money. The Anker SOLIX F3800 Plus is the better whole-home machine, with 6,000W continuous output, 120V/240V split-phase, 3,200W solar input, and expansion to 53.8kWh.
6.5WattBench
score / 10
score / 10
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Quick take
Which one fits your loads?
Choose Bluetti if
Elite 400
- You want the most watt-hours for the lowest price
- Your loads stay under 2,600W and you do not need 240V
- You want a wheeled unit for fridge and freezer backup
Choose Anker SOLIX if
F3800 Plus
- You need 240V for a transfer switch, well pump, or subpanel
- You want 6,000W continuous and 12,000W surge
- You want 3,200W solar input and 53.8kWh expansion
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 | Bluetti Elite 400 | Anker SOLIX F3800 Plus |
|---|---|---|
| Rated capacity | 3,840 Wh | 3,840 Wh |
| Usable (85%) | 3,264 Wh | 3,264 Wh |
| Continuous output | 2,600 W | 6,000 W |
| Surge | 5,200 W | 12,000 W |
| Chemistry | LiFePO4 | LiFePO4 |
| Weight | 86 lb | 136.7 lb |
| AC input | 1,800 W | 1,800 W |
| Recharge time | 80% in 70 min (1,800W) | <3 hr (1,800W) |
| Solar input | 1,000 W | 3,200 W |
| Expansion | No | 53.8 kWh |
| Warranty | 5 years | 5 years |
| Street price | $1,299–$1,499 | $3,599 |
| Cost / usable Wh | $0.43 | $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.
Bluetti Elite 400 · 6.6/10Anker 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
This is the clearest example of paying for power electronics rather than battery cells. Both units store 3,840Wh and deliver about 3,264Wh usable. The Elite 400 costs roughly $1,399; the F3800 Plus costs roughly $3,599.
The F3800 Plus adds a 6,000W inverter, 240V output, 3,200W solar input, and a much larger expansion ceiling. If you do not need those, the premium is difficult to justify.
Output: 2,600W versus 6,000W
The Elite 400 delivers 2,600W continuous and 5,200W surge. The F3800 Plus delivers 6,000W continuous and 12,000W surge. That is more than double the continuous power from the same battery capacity.
The practical difference is which appliances can run at once. The Elite 400 handles a fridge, freezer, lights, and electronics. The F3800 Plus can run a well pump, a dryer, or a subpanel with several circuits, provided the battery has the energy.
240V is the feature you cannot add later
The F3800 Plus supports 120V/240V split-phase output. The Elite 400 is 120V only. A 240V transfer switch or subpanel install is not something you can retrofit to the Bluetti.
If your backup plan includes a well pump, electric dryer, or central air, 240V is likely a requirement. If your plan is extension cords to a fridge and a few lights, it is unnecessary.
Solar and expansion
The F3800 Plus accepts 3,200W of solar and expands to 53.8kWh. The Elite 400 accepts 1,000W and does not expand. These are different classes of system.
Again, price the batteries and panels before deciding. The F3800 Plus's ceiling is impressive, but reaching it costs several times the base unit.
Weight and installation
The Elite 400 weighs 86 lb and has wheels. The F3800 Plus weighs 136.7 lb. Both are two-person lifts, but the Anker is a permanent-ish installation in practice.
A 240V install needs an electrician, a transfer switch or inlet box, and proper grounding. Budget for that work before comparing station prices.
Which should you buy?
Buy the Elite 400 for straightforward, budget-conscious backup of 120V appliances. It is one of the best watt-hours-per-dollar values in this entire group.
Buy the F3800 Plus if you need 240V or 6,000W, or if you are building a large solar-backed system. The price is high, but the capability is in a different league.
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 | Elite 400 | F3800 Plus |
|---|---|---|---|
| Refrigerator (avg.) | 75 W | 44 hr | 44 hr |
| CPAP (no humidifier) | 40 W | 3.4 days | 3.4 days |
| Wi-Fi + laptop | 60 W | 2.3 days | 2.3 days |
| Microwave | 1,000 W | 3.3 hr | 3.3 hr |
| Space heater | 1,500 W | 2.2 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
Why is the F3800 Plus $2,200 more for the same capacity?
You are paying for a much larger inverter, 240V split-phase output, 3,200W solar input, and a 53.8kWh expansion path. The battery capacity is the same; the power electronics are not.
Can the Elite 400 run 240V?
No. It is a 120V station. For 240V loads you need a split-phase unit like the F3800 Plus or the DELTA Pro 3.
Can the F3800 Plus run a whole house?
It can power selected circuits through a transfer switch or subpanel, not an entire house at once. Load management is still required.
Is the Elite 400 enough for a fridge?
Yes. At a 75W average draw it runs about 43.5 hours. That is one of the longest runtimes in this group.
Which is better for an RV?
Neither is an ideal RV-first unit. The Elite 400 lacks 240V and a published TT-30; the F3800 Plus is heavy and expensive for camper use. Look at the AC200P L or HomePower 2000 Plus v2 instead.
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.