EcoFlow · new release
EcoFlow DELTA 3800 Gen4
A 3.8 kWh LiFePO4 station with 3,600 W of output, rated for 6,000 cycles. What it runs, how it fared in 38 written head-to-heads, and what owners report.
3.8 kWh · 3,600 W · 67.5 lb · 6,000 cycles · 38 head-to-heads
5,286
Power Score · The AC & Fridge Zone
- 3.8 kWh
- capacity
- 3,600 W
- output
- 67.5 lb
- weight
- 6,000
- rated cycles
Should you buy it right now?
DELTA 3800 Gen4: 3,763Wh, clears 5 of 6 real-world jobs, wins 23 of 38 matchups.
Price now
$2,199
EcoFlow’s announced price · tracking starts when it goes on sale
Real-world jobs
5 of 6
Falls short only on Van Life Daily
Head-to-head record
23–15
38 adjudicated matchups
Verdicts by Gunner Gustafson and the Test Desk·Figures computed 2026
01 · Six real-world jobs
What the DELTA 3800 Gen4 actually runs
The load profiles every comparison on the site is scored on, computed for this unit alone: energy needed against the usable tank after inverter losses, and whether the inverter holds and starts the biggest single load.
Weekend Camping
Clears it2 nights · Two nights off-grid with essential comfort
2,100Wh needed · 66% of the tank · 1,099Wh spare
Peak 75W: starts and holds
8-Hour Blackout
Clears it8 hours · Keep the essentials running through a night without power
1,645Wh needed · 51% of the tank · 1,554Wh spare
Peak 150W: starts and holds
CPAP Overnight
Clears it8 hours · Sleep therapy without interruption — the #1 medical use case
320Wh needed · 10% of the tank · 2,879Wh spare
Peak 40W: starts and holds
Remote Workday
Clears it8 hours · Full work day off-grid without power anxiety
910Wh needed · 28% of the tank · 2,289Wh spare
Peak 60W: starts and holds
Tailgate Party
Clears it4 hours · Game day power for the crew
670Wh needed · 21% of the tank · 2,529Wh spare
Peak 400W: starts and holds
Van Life Daily
Falls short24 hours · A full day of mobile living — the ultimate endurance test
4,685Wh needed · 146% of the tank · 1,486Wh short
Peak 150W: starts and holds
02 · Head-to-head record
23 wins in 38 written matchups
Every matchup is a full verdict scored on the six jobs above plus price, longevity and portability. This is the set shoppers search for, not a random sample.
Win share
23–15
- vs EcoFlow9–4
- vs BLUETTI6–4
- vs Anker3–4
- vs Jackery3–3
- vs DJI1–0
- vs Goal Zero1–0
winsDELTA 3800 Gen4 vs EcoFlow DELTA 2 Max
Written verdict
winsDELTA 3800 Gen4 vs EcoFlow DELTA 3 Classic
Written verdict
winsDELTA 3800 Gen4 vs EcoFlow DELTA 3 Max Plus
Written verdict
losesDELTA 3800 Gen4 vs EcoFlow DELTA 3 Max
Written verdict
winsDELTA 3800 Gen4 vs EcoFlow DELTA 3 Plus
Written verdict
losesDELTA 3800 Gen4 vs EcoFlow DELTA 3 Ultra Plus
Written verdict
03 · From the verdicts
Who it is for, and when a rival won instead
Each line is lifted from a written matchup where it decided the verdict, and links to the page it came from. Repeated across many matchups means it is the unit’s signature, not one author’s opinion.
Buy the DELTA 3800 Gen4 if…
**Your outages run past one night.** It ends the eight-hour blackout with 1,554 Wh left.
Decided 14 matchups · read one →
**It will cycle every day.** It's rated for twice the DELTA 2 Max's cycles.
Decided 9 matchups · read one →
**You already own a DELTA 3 Max Plus extra battery.** It plugs into this one's battery port [B6].
Decided 9 matchups · read one →
**Your outages last more than a night.** It finishes the first with 1,554 Wh in hand.
Decided 4 matchups · read one →
A rival won when…
**You need it now.** It's on sale today at $499.
Decided 11 matchups · read one →
**You need power before late November.** EcoFlow ships the DELTA 4 (3800) then [A10].
Decided 10 matchups · read one →
**You'll carry it.** It's 26.7 lb against 67.5 lb.
Decided 8 matchups · read one →
**It lives in the garage and rolls to the kitchen.** Wheels and a pull handle [B2].
Decided 6 matchups · read one →
05 · Voices
What owners and reviewers say
Owner reports are paraphrased from public YouTube comments and each links to its source; reviewer consensus is counted from cited excerpts, never quoted; our own verdicts are quoted. Specs on this page never come from any of them.
Reviewer consensus
1/12 positive excerpts, 1 sources
Launch-day ledger: every entry is EcoFlow's own US store and documentation, or our labelled arithmetic. No owner or reviewer evidence exists yet.
ecoflow us store, us.ecoflow.com · researched 2026-11-04
From the test desk
“**For a house that rides out long outages on solar, I'd buy the DELTA 4 (3800).** It holds 3,763 Wh to 2,048 Wh, takes 2,000 W of solar across two inputs to 1,000 W [B5], and comes out of an eight-hour blackout with…”
“**For outages that run past one night, I'd buy the DELTA 4 (3800).** It holds 3,763 Wh against 1,024 Wh, takes 2,000 W of solar across two inputs [B5], and accepts up to two extra batteries [B6].”
“**For outage backup, I'd start with the DELTA 4 (3800).** It holds 3,763 Wh against 2,048 Wh, takes 2,000 W of solar against 1,000 W and runs 3,600 W against 3,000 W, at about the same money per watt-hour.”
06 · Where each number comes from
Spec sheet, in four cards
Every field carries its source: green is the manufacturer’s own document, blue was adjudicated after sources disagreed, grey is the catalogue as imported. Then compare it line by line with the units people actually weigh it against.
Battery
3763
Capacity (Wh)
- ChemistryLiFePO4
- Charging Cycles6000
- Battery Expansion FeasibilityYes
Power out
3600
Output (W)
- Surge Peak7200W
- AC Outlets5
- 240V Outlets0
- 30A RV Outlets0
- 12V Car Outlets0
- USB-C Ports3
- USB-A Ports1
- USB-C Charging Outputs140W, 65W, 65W
Charging
2000
Solar Input (W)
- Solar Input TypeXT60
Living with it
67.5
Weight (lbs)
- Noise Level (db)40
- UPSYes (10ms)
- App ControlYes
- Warranty (Years)5
Compare it with
DELTA 3800 Gen4 vs
leads on 6 · trails on 4
| Spec | DELTA 3800 Gen4 | DELTA 2 Max | Gap |
|---|---|---|---|
| Usual price | $2,199 | $1,049 ● | +$1,150 |
| Capacity (Wh) | 3763 ● | 2048 | +1715 |
| Output (W) | 3600 ● | 2400 | +1200 |
| Surge (W) | 7200W ● | 4800W | +2400 |
| Rated cycles | 6000 ● | 3000 | +3000 |
| Solar input (W) | 2000 ● | 1000 | +1000 |
| Weight (lb) | 67.5 | 50.7 ● | +16.8 |
| Noise (dB) | 40 | 30 ● | +10 |
| AC outlets | 5 | 6 ● | -1 |
| USB-C ports | 3 ● | 2 | +1 |
| Warranty (yr) | 5 | 5 | 0 |
| Chemistry | LiFePO4 | LiFePO4 | |
| UPS | Yes (10ms) | Yes (<20ms) |
● marks the better figure where direction is clear. Price is each unit’s usual price.
Read the full verdict →08 · At its usual price
Cost of ownership
Cycle life is the manufacturer’s rating to 80% capacity; the lifetime figure is that rating times the nameplate capacity.
$0.58
per Wh
at $2,199
$0.10
per lifetime kWh
22,578 kWh over 6,000 cycles
16.4 yr
if cycled daily
58 yr at weekends only
5 yr
warranty
$440 per covered year