Head-to-head test
EcoFlow DELTA 3800 Gen4 vs BLUETTI Elite 400Only the EcoFlow Can Grow. Will You Ever Need It To?
Nearly the same battery, and the Elite 400 costs far less. I'd buy the Elite, unless you're wiring more than 1,000 W of panels or already know 3,840 Wh won't be enough.
Black Friday Β· 23 days out
Price to beat:Elite 400 $1,299
The lowest we have recorded. A Black Friday price above it is a sale this unit has already had.
Full profiles: EcoFlow DELTA 3800 Gen4 β Β· BLUETTI Elite 400 β
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Spec deltas
Gunnerβs take
Whole-Home Backup Tester
These two hold nearly the same battery.
BLUETTI's Elite 400 is 3,840 Wh and EcoFlow's new DELTA 4 (3800) is 3,763 WhA1. The Elite sells for $1,399, and EcoFlow lists the DELTA 4 at $2,199A10. So the gap pays for something other than capacity, and the question is whether you'd use it.
What the Numbers Reveal
Each conclusion stated first β the numbers behind it on one line, the full analysis below.
rated cycles
Those two belong to the same buyer. More than 1,000 W of panels means a roof or a ground rack, feeding a cabin or a house that empties and refills the battery most days. Daily is exactly where the Elite's 3,000 cycles run out, in 8.2 years. Off one or two folding panels, neither input is near its limit and the cycle gap never comes due.
DELTA 4 (3800): two solar inputs, 1,000 W each, 2,000 W totalA5Elite 400: 1,000 W of solar input6,000 cycles against 3,000; drained daily, 16.4 years against 8.2
Why it mattersIf you're building a real array, the DELTA 4 (3800) is the one that uses all of it, and the cheaper one to own per lifetime kWh, $0.10 against $0.12.
Neither covers a Van Life day alone. EcoFlow sells the DELTA 4 (3800) in a kit with a DELTA 3 Max Plus extra battery that comes to 6 kWh in allA10, past what that day asks for. The Elite stays short whatever you spend later. A first extra battery mostly buys back capacity the Elite ships with, though, so it only counts if you're sure you'll go past 3,840 Wh.
Elite 400: fixed at 3,840 Wh, no expansionB1DELTA 4 (3800): up to two extra batteries, EcoFlow quotes 4 to 12 kWhA6Van Life Daily needs 4,685 Wh: the DELTA 4 (3800) is 1,486 Wh short, the Elite 400 1,421 Wh
Why it mattersIf you can already name the load that needs more than 3,840 Wh, buy the box that grows.
The specific dimensions that decide these two units β everything else is a tie.
Growth Path
Selected because: The Elite is sealed at 3,840 Wh. The DELTA 4 (3800) starts just short of it and takes extra batteries.
solar input
The sealed box starts higher. At 3,840 Wh the Elite 400 sits just past the DELTA 4 (3800)'s 3,763 Wh, so EcoFlow's first extra battery partly buys back what the Elite already has. That's the fair case for the sealed box.
Past 3,840 Wh, only the DELTA 4 keeps going. It takes up to two extra batteries through EcoFlow's expansion adapter, either the DELTA Pro 3 battery or the DELTA 3 Max Plus at 2,048 Wh, and EcoFlow quotes 4 to 12 kWh in allA6. I'd only pay for that port if I could already name the load that needs it.
What the Specs Don't Tell You
Selected because: 3,600 W against 2,600 W, and two heater modes that do the same trick.
rated cycles
For motors and stacked loads, the DELTA 4 has the stronger inverter. It runs 3,600 W and surges to 7,200 WA2, against 2,600 W on the Elite. BLUETTI's Power Lifting reaches 3,900 WB1, but only for heaters and kettles, and only by feeding them less power than they ask for. EcoFlow's X-Boost does the same trick, and its US store page sends you to the manual for the figureA2.
Both switch over fast enough for a router. EcoFlow rates the DELTA 4 at no more than 10 ms and BLUETTI rates the Elite at no more than 15 ms. The fussiest desktop power supplies sit near the slower line, so a PC is the one load where I'd want the quicker rating. Neither figure is a lab result.
Portability & Form Factor
Selected because: 67.5 lb against 85 lb, and the heavier one is the one on wheels.
weight
The heavier box is the one with wheels. The Elite 400 is 85 lb and rolls on its own trolleyB3. The DELTA 4 (3800) is 67.5 lb with a handle at each end, and EcoFlow sells its folding cart separatelyA7.
Stairs are where the 17.5 lb shows up. On a garage floor I'd rather have the Elite's wheels. Down basement steps or up into a truck bed, I'd rather carry the lighter one by myself.
Brand Trust
Selected because: Two different support records stand behind these boxes, and the Elite's depends on where you buy it.
Neither support desk is spotless, and BLUETTI's is the patchier. Our brand file has EcoFlow on US phone, email and chat, with outcomes that swing from quick replacements to long waits. BLUETTI runs mostly on email with China-timezone delays, and buying direct from BLUETTI tends to go better than a reseller claim.
Both get harder once the warranty ends. EcoFlow offers no parts or service outside it, and BLUETTI has no spare-parts policy for some models. Each carries 5 years on our record, so register the unit the week it arrives.
In the makersβ pictures
What youβd actually be living with
Every port, labelled
What plugs in where, and how much it takes
EcoFlow DELTA 3800 Gen4
Front panel
- 1USB-C Β· 140 WOutUp to 140 W (USB-PD up to 28 V at 5 A). The port for a laptop.
- 22Γ USB-C Β· 65 WOutUp to 65 W each. EcoFlow says these two and the USB-A share 16 W when two or more are in use at once.
- 3USB-A Β· 36 WOutUp to 36 W (5, 9 or 12 V at 3 A).
- 430 A twist-lockOutA three-slot twist-lock marked 30A MAX, rated 30 A at 120 V on the US unit.
- 54Γ 20 A outletsOutFour T-slot 120 V outlets rated 20 A each, sharing 3,600 W continuous and a 7,200 W surge.
Photo: EcoFlow Β· Product image, EcoFlow Japan store Β· numbers and labels are ours. Ratings from EcoFlowβs US spec table; outlet shapes read by us from EcoFlowβs picture, taken of the Japanese unit, which shares the US panel.
Input side
- 12Γ Solar/DC in Β· 1,000 WInTwo inputs, each 11 to 60 V, up to 20 A, 1,000 W: 2,000 W of panels in all.
- 2AC in Β· 1,800 WIn100β120 V at 15 A. Charges at up to 1,800 W, which at 120 V is the whole of an ordinary 15 A circuit.
- 3Battery portIn Β· OutTakes up to two of EcoFlowβs DELTA 3 Max Plus or DELTA Pro 3 extra batteries; EcoFlow quotes 4β12 kWh.
Photo: EcoFlow Β· Product image, EcoFlow Japan store Β· numbers and labels are ours. Ratings from EcoFlowβs US spec table and the panelβs own printing.
BLUETTI Elite 400
Front panel
- 1Solar/DC in Β· 1,000 WInPrinted 12V-60V/20A/1000W: up to 1,000 W of solar. BLUETTIβs store page also lists car charging, 100 W from a 12 V socket.
- 212 V car socket Β· 120 WOutA covered car socket printed 12V/10A; BLUETTIβs store page rates it 120 W.
- 32Γ USB-C Β· 2Γ USB-AOutA USB-C port at each end, printed 100W each, and two USB-A ports between them, printed 15W each (30 W together, BLUETTI says).
- 44Γ 20 A outletsOutFour 120 V T-slot outlets, each printed 20A Max, sharing 2,600 W (printed on the panel) and a 5,200 W surge.
Photo: BLUETTI Β· Product image, BLUETTI store Β· numbers and labels are ours. Ratings printed on BLUETTIβs panel and listed on BLUETTIβs US store page; the surge figure from our catalogue.
Input side
- 1AC in Β· 1,800 WInThe AC charging inlet, behind a cover. Up to 1,800 W at 120 V by BLUETTIβs store page, or 2,800 W with solar at the same time.
Beside the inlet: a grounding screw and a reset button printed 20A Circuit Protector. BLUETTIβs pictures show no ports on the other side and donβt show the back. No battery port: the Elite 400 doesnβt take extra batteries.
Photo: BLUETTI Β· Product image, BLUETTI store Β· numbers and labels are ours. Port name printed on BLUETTIβs panel; the rating from BLUETTIβs US store page.
Strengths & trade-offs
EcoFlow DELTA 3800 Gen4
Strengths
- +Lighter by 17.5 lb
- +Higher AC output
- +Faster solar charging
- +Rated for 6,000 charge cycles β much longer battery lifespan
Trade-offs
- βSubstantially more expensive (+$800) than the Elite 400.
BLUETTI Elite 400
Strengths
- +Costs $800 less
- +Larger battery capacity
Trade-offs
- βSignificantly heavier (+17.5 lbs), making it harder to move.
- βWeaker inverter (-1,000W) limits appliance compatibility.
- βVery heavy unit that may be difficult for one person to lift.
- βShorter-lived battery β rated for 3,000 charge cycles vs the DELTA 3800 Gen4's 6,000, so it wears out sooner.
Will It Power Your Gear?
Scenario math and per-appliance runtimes, modeled from the spec record.
Scenario verdicts
We ran the math on six real-world scenarios. Here's which unit survives your actual life.
SCN-01 Β· 2 nights Β· needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
Either unit
Both cover the 2,100 Wh weekend, with 1,099 Wh and 1,164 Wh to spare. The DELTA 4 (3800) is 17.5 lb lighter to lift into the car, and the Elite 400 rolls once it's on the ground.
Battery budget usedlower = more headroom
LOADΒ Β Phone Charger 15WΓ6h Β· LED Lights 40WΓ8h Β· Box Fan 75WΓ14h Β· CPAP Machine 40WΓ16h
SCN-02 Β· 8 hours Β· needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
Either unit
Both finish the 1,645 Wh night with 1,554 Wh and 1,619 Wh left, so capacity doesn't split them. A desktop PC is the tiebreak: no worse than 10 ms on the DELTA 4 (3800), 15 ms on the Elite 400.
Battery budget usedlower = more headroom
LOADΒ Β Fridge 150WΓ8h Β· Router + Modem 20WΓ8h Β· LED Lights (4 bulbs) 40WΓ6h Β· Phone Charger 15WΓ3h
SCN-03 Β· 8 hours Β· needs 320Wh
CPAP Overnight
Sleep therapy without interruption β the #1 medical use case
Either unit
A CPAP is about 40W for eight hours, so both of these cover the night several times over β capacity isn't the question here. The only published difference is fan noise, and it can't settle this: the Elite 400 is rated 30dB and the DELTA 3800 Gen4 40dB, but the Elite 400's is its maker's best case and the DELTA 3800 Gen4's is EcoFlow's maximum under heavy charge and discharge, so at a 40W draw the real gap can only be narrower than it looks, and may even run the other way. Neither settles which box is quieter at a bedside. Buy whichever is cheaper or easier to carry.
Battery budget usedlower = more headroom
LOADΒ Β CPAP Machine 40WΓ8h
SCN-04 Β· 8 hours Β· needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
Either unit
Both power your workstation all day without strain. At these utilization levels the real difference is USB-C for direct laptop charging β 140W on the DELTA 3800 Gen4 against 100W β which beats the inverter for convenience and wastes less energy.
Battery budget usedlower = more headroom
LOADΒ Β Laptop 60WΓ8h Β· External Monitor 30WΓ8h Β· Router + Modem 20WΓ8h Β· Phone Charger 15WΓ2h
SCN-05 Β· 4 hours Β· needs 670Wh
Tailgate Party
Game day power for the crew
Either unit
Both handle game day easily. Since capacity isn't the deciding factor, weight is: at 67.5 lbs the DELTA 3800 Gen4 is the one you'll be glad you brought. Fan noise under load is worth a listen too β it's audible in the lulls between songs.
Battery budget usedlower = more headroom
LOADΒ Β Blender 400WΓ0.5h Β· LED TV (55") 80WΓ4h Β· Bluetooth Speaker 15WΓ4h Β· Phone Charger (Γ3) 45WΓ2h
SCN-06 Β· 24 hours Β· needs 4,685Wh
Van Life Daily
A full day of mobile living β the ultimate endurance test
Neither unit
Neither covers 4,685 Wh on its own battery. The DELTA 4 (3800) can get there with an extra battery. The sealed Elite 400 can't.
Battery budget usedlower = more headroom
LOADΒ Β Mini-Fridge 150WΓ24h Β· Laptop 60WΓ4h Β· Phone Charger 15WΓ3h Β· LED Lights 40WΓ5h Β· Fan 75WΓ8h
The Load Test
RUNTIME = (Wh Γ 0.85) Γ· LOAD
None of the scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
Dead heat β both run this 205W load for roughly 15.6h. Pick on price, weight, or ports.
Planning for more than this? Describe your whole setup and get it sizedΒ β
Modeled from the spec record β same math as the tables below. Methodology
Runtime by appliance
Real-world runtime estimates for common appliances, modeled at 85% inverter efficiency.ΒΉ
Essentials
The basics you need runningscale 0β217.6hComfort & Convenience
Makes off-grid life actually enjoyablescale 0β43.5hHigh-Draw Appliances
These reveal the real limitsscale 0β3.3hΒΉ Runtime = (capacity Γ 0.85) Γ· appliance watts. Within each group, all bars share one time scale (the group's longest runtime), so lengths are comparable across appliances; identical runtimes collapse into a single blue/orange bar. Actual runtime varies with battery age, temperature, and simultaneous loads β see methodology.
Conclusion
November 4, 2026
Verdict: the Elite 400
I'd buy the Elite 400, unless you charge from a big solar array or plan to add batteries. It holds 3,840 Wh against 3,763 Wh and costs $800 less. That money buys a real list on the DELTA 4 (3800): twice the solar input, an extra-battery port, 3,600 W against 2,600 W, 17.5 lb less weight and twice the rated cycles. Each one matters to somebody with panels on a roof or a battery plan, but none of them adds a watt-hour to the box you start with. The DELTA 4 also ships in late NovemberA10, and the Elite is on sale now.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of November 4, 2026. The links below open EcoFlow's and BLUETTI's current prices.
$1,399.00 Β· direct from BLUETTI
Last checked 31 days ago. Prices move β check before you buy.
or check the DELTA 3800 Gen4 price$2,199.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester Β· Station Arena Test Desk Β· Updated November 4, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): Tailgating, Apartment Balcony.
Full specifications
α΅ Derived: price Γ· rated capacity. See the data behind our comparisons β
Comparison ToolAdd more power stations, side by sideOpen Tool βHow these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it β no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews β see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity Γ 0.85 inverter efficiency) Γ· device wattage. Solar recharge estimates assume panels deliver 70% of rated output. Cold weather, battery age, and stacked loads reduce real-world results.
Power Score
Computed from 14 published spec dimensions, weighted per use-case bench. Higher is better; a unit must meet a bench's minimum threshold to be rated.
See the full weight table and data sourcing on our methodology page βClass ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews β no buyer opinions feed it. We score every station on size-independent quality (value, output, portability, endurance, ports, warranty, and more), then percentile-rank it against the other units in its capacity class, so a class-leading compact unit and a class-leading whole-home unit can both earn 5β . Here, DELTA 3800 Gen4 rates 4.1/5 (48th percentile of 22 Home Backup-class units), and Elite 400 rates 3.6/5 (19th percentile of 22 Home Backup-class units).
How the class ranking is computed βTest Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
17.5 lb Apart
The DELTA 4 (3800) is 67.5 lb and the Elite 400 is 85 lb. One person can carry the DELTA 4 up a flight of stairs. The Elite rolls on flat ground and wants a second pair of hands at the first step.
Elite 400: Sealed, and Already a Little Bigger
The Elite 400 ships at 3,840 Wh, just more than the DELTA 4 (3800) starts with, and that's where it stays. The DELTA 4 takes extra batteries, so it only pulls ahead once you'd go past 3,840 Wh.
Elite 400: Power Lifting to 3,900W
The Elite 400 has BLUETTI's Power Lifting mode, which runs a resistive appliance rated up to 3,900W from its 2,600W inverter. It does that by delivering less power than the appliance asks for, not more than the inverter has: the heater still works, it just heats more slowly. Two things follow. BLUETTI scopes the mode to purely resistive loads β a heater, a kettle, an incandescent lamp β so it does nothing for a fridge compressor, a pump or a power tool; for motor loads the figure to read is the Elite 400's separate 5,200W surge peak, not this one. And it is not a reason to size down, because running a load that big from 3,840Wh is a short session either way. Genuinely useful if a heater or a kettle is why you're buying; beside the point otherwise. EcoFlow's X-Boost works the same way, running a resistive load past the inverter's rating at reduced power, but our record for the DELTA 3800 Gen4 carries no X-Boost figure, so check EcoFlow's spec sheet before comparing the two ceilings.
UPS Switchover: β€10ms vs β€15ms
Both list a UPS mode, at different rated speeds. The DELTA 3800 Gen4 is rated β€10ms β quick enough on paper that desktop PCs and routers should ride through, treating that as the rating it is. The Elite 400 is rated β€15ms β fine on paper for routers and most electronics; the fussiest PC power supplies sit right at this line. If a computer with unsaved work is the thing being protected, the stated class is worth the attention; nothing here is a lab result.
Warranty: No Difference
Both units carry the same 5-year warranty, so coverage isn't a tiebreaker here. Both figures are maximums rather than guarantees: EcoFlow's depends on registering the unit in the EcoFlow app, which adds two years to a three-year standard term; BLUETTI's on buying direct from BLUETTI or registering the unit, since reseller purchases carry a shorter term. Worth saying because the per-dollar framing can suggest otherwise: the Elite 400 works out at 3.6 years of cover per $1,000 spent against the DELTA 3800 Gen4's 2.3, but that spread is the price gap, not the terms.
Battery Lifespan in Real Years
The DELTA 3800 Gen4 is rated for 6,000 cycles vs 3,000. In real life: at daily use, that's 16.4 vs 8.2 years. At weekend use (twice a week), it's 58 vs 29 years. After hitting the cycle limit, the battery doesn't die β it drops to ~80% of original capacity, which is still very usable.
Full record above β the Test Desk pick is the Elite 400.
Check Elite 400 price βor check the DELTA 3800 Gen4 priceOwnership Analysis
What happens after you buy β true cost of ownership, brand trust, and growth potential.
Lifetime value
Service lifeyears at one full cycle per day
Lifetime energy delivered
Cost per delivered kWh
β warranty ends Β· Reaching the cycle rating means ~80% capacity remains β degraded, not dead.
Analyst note
The Elite 400 is cheaper to buy, but the DELTA 3800 Gen4 is cheaper to own. At $0.10/kWh over its lifetime vs $0.12/kWh, the DELTA 3800 Gen4's higher cycle life and capacity make each dollar go further over the years.
Brand trust
EcoFlow
Ecosystem
Largest in portable power β 12-15 models across DELTA Pro, DELTA 3, and RIVER 3 series, plus solar panels and smart home panels
Support
US-based phone/email/chat support (1-800-368-8604). Experiences are polarized β many report hassle-free prepaid-label replacements, but others report long waits and refurbished units sent for new claims. Pro tip: buying from Costco or Amazon gives you a stronger return safety net.
Community
Largest community in the space β Reddit r/Ecoflow_community (~31K members), multiple Facebook groups, and an official community forum
App experience
Rated 4.6/5 iOS (~8,400 ratings) Β· 4.2/5 Android (~17,000 ratings)
Unique strength
Fastest-charging technology (X-Stream), deepest product ecosystem, and most active innovation cadence. At the top of the range sit two whole-home paths: the TITAN line, one 5 kWh unit that grows to 30 kWh, and the DELTA Pro Ultra platform, which stacks batteries and inverters further β flagship paths, not line-wide features.
Worth knowing
Tested subscription paywalls for advanced app features in early 2025 before community backlash paused the plan. No parts or service offered out of warranty.
BLUETTI
Ecosystem
One of the broadest lineups β 15-20+ models from budget (AC2A) to flagship portable (Apex 300, 2764.8Wh). Includes specialized products: vehicle solar hubs, sodium-ion cold-weather units, and balcony storage systems.
Support
The most inconsistent support in the space. Heavily email-based with China timezone delays. Some users get smooth, efficient service; others report weeks of troubleshooting runarounds, being offered discounts on new units instead of repairs, and confusing third-party purchase claim processes. Buying direct from Bluetti's website tends to produce better support outcomes.
Community
Active and growing β Reddit r/bluetti has a dedicated community. Second-largest after EcoFlow in engagement.
App experience
Rated 4.5/5 iOS and Android β tied for best app experience in the category. V3.0 UI redesign was well-received.
Unique strength
Among the best capacity-to-price ratios available β several Elite and Apex units are the lowest $/Wh in the catalog. Widest product diversity including industry-firsts like sodium-ion cold-weather units and dual solar+alternator vehicle hubs. LFP across the rest of the range, though rated cycle life spans 2,500 (EB3A) to 6,000, and it varies WITHIN the Elite range rather than tracking it β the Elite 300 and Elite 200 V2 are rated 6,000 while the Elite 30 V2, Elite 10 Mini, Elite 320 and Elite 400 are rated 3,000+ and the Elite 100 V2 4,000+, so check the specific model. Dual-voltage (120V/240V) in flagships.
Worth knowing
Customer support inconsistency is the #1 risk factor. Older/discontinued units may become unrepairable β no spare parts policy for some models. Some reports of erratic communication from support agents.
Analyst note
EcoFlow positions itself as a mid-to-premium brand with stronger support infrastructure, while BLUETTI competes on value. The question is whether the EcoFlow ecosystem and support premium is worth it for your use case.
Growth path
DELTA 3800 Gen4
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit β useful if your needs may climb past 3,763Wh.
Accepts up to 2,000W of solar. Enough for a serious multi-panel array.
Adequate ports for most setups, but heavy users may want a power strip.
Expansion batteries are EcoFlow-specific. You're investing in the EcoFlow ecosystem.
Elite 400
FIXED CAPACITYFixed at 3,840Wh β a sealed, complete system rather than a starting point. There's no expansion port, so that figure is the ceiling: check it against your longest unplugged stretch before you buy.
Accepts up to 1,000W of solar. Enough for a serious multi-panel array.
Adequate ports for most setups, but heavy users may want a power strip.
Realistic full solar rechargeat 70% of rated panel output β see methodology
Analyst note
Don't read the DELTA 3800 Gen4's expandability as a straight win here: it starts at 3,763Wh, below the Elite 400's 3,840Wh, so a first expansion battery largely buys back capacity the Elite 400 already includes. It only pulls ahead if you'd grow past 3,840Wh β short of that, the Elite 400's larger fixed capacity is the simpler value.
What Owners Report
Patterns from published owner reports and long-term reviews β every claim cited to its source below.
EcoFlow DELTA 3800 Gen4
Nobody has one in hand yet. EcoFlow opened US sales on November 4 and says the DELTA 4 (3800) ships in late NovemberA10, so this side of the page is EcoFlow's US store and FAQ, plus our arithmeticA1A5.
I'd want to see both solar inputs full at once. If I had one, I'd hang close to 1,000 W of panels on each input on a clear June day and watch whether the screen ever reads 2,000 W coming inA5. That's EcoFlow's figure, and it's the one this page leans on.
βCapacity 3,763 Wh, LFP (LiFePO4) cells. EcoFlow sells it as the DELTA 3800 Gen4; buyers and the press call the pair the DELTA 4.β
Sources
us.ecoflow.co Β· jp.ecoflow.co
BLUETTI Elite 400
The Elite 400's coverage is reviews, not years of ownershipB1B2B3. Reviewers describe BLUETTI's largest Elite unit, fixed at its native capacityB1, with a built-in trolleyB2.
The weight comes up, and so do the wheels. Reviews put it around 86 lb, call that hefty and point to the wheels and trolley that move itB3. Our record says 85 lb.
βBLUETTI's largest Elite-range unit β a 3,840Wh LiFePO4 battery with 2,600W continuous output (3,900W Power Lifting), fixed at native capacity with no expansion.β
Sources
techradar.com Β· amazon.com Β· backuppowerhub.com Β· cleantechnica.com Β· notebookcheck.net Β· thesolarlab.com Β· edinburghnews.scotsman.co
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- Launch-day ledger: every entry is EcoFlow's own US store and documentation, or our labelled arithmetic. No owner or reviewer evidence exists yet. [DELTA 3800 Gen4 Β· 12 entries]
- Large 3,840Wh LFP capacity, fast charging, 15ms UPS, and a trolley are the praise; only two AC sockets, no expansion, and heavy weight are the caveats. [Elite 400 Β· 2 entries]
- A1
βCapacity 3,763 Wh, LFP (LiFePO4) cells. EcoFlow sells it as the DELTA 3800 Gen4; buyers and the press call the pair the DELTA 4.β
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) Β· 2026-11-04 Β· [mixed]
- A2
βUS unit: 120 V AC, 60 Hz; rated 3,600 W continuous with a 7,200 W surge. It supports X-Boost (EcoFlow refers to the manual for the US X-Boost figure); X-Boost is unavailable while the unit charges from the wall or runs in bypass.β
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) Β· 2026-11-04 Β· [mixed]
- A3
βAC outlets: 5 total, four rated 20 A max and one rated 30 A max (on EcoFlow's product images, four T-slot outlets and a three-slot twist-lock). USB-A: one port, 36 W max. USB-C: one at 140 W max and two at 65 W max; the two 65 W ports share circuitry with the USB-A, limited to 16 W total when used together. No 12 V car socket.β
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) Β· 2026-11-04 Β· [mixed]
- A5
βSolar: two inputs, 11β60 V DC at up to 20 A and 1,000 W each, 2,000 W total (XT60i; two XT60i-to-LP60 cables are in the box). EcoFlow lists six charging methods; its 800 W Alternator Charger is limited to 500 W through the Solar/DC port.β
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) Β· 2026-11-04 Β· [mixed]
- A6
βExtra Battery Port: up to two extra batteries through EcoFlow's Smart Extra Battery Expansion Adapter. Compatible: the DELTA Pro 3 Smart Extra Battery and the DELTA 3 Max Plus (2,048 Wh) Smart Extra Battery. EcoFlow quotes 4β12 kWh of expandable capacity.β
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) Β· 2026-11-04 Β· [mixed]
- A7
βWeight 67.5 lb (30.6 kg); 16.77 Γ 11.36 Γ 12.09 in without handles, 18.76 in long with them. A handle at each end; EcoFlow sells a folding transport cart separately ($109 at launch, listed at $199). EcoFlow calls it the smallest and lightest portable power station in its class (3β4 kWh and 3,600 W).β
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) Β· 2026-11-04 Β· [mixed]
- A10
βOn sale at us.ecoflow.com from November 4, 2026 at $2,199; EcoFlow says it ships in late November. Kits: with two 160 W solar panels $2,899; with a DELTA 3 Max Plus extra battery (6 kWh in all) $2,999. EcoFlow also sells it in Japan, where it went on sale October 30 at Β₯240,900.β
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) Β· 2026-11-04 Β· [mixed]
- B1
βBLUETTI's largest Elite-range unit β a 3,840Wh LiFePO4 battery with 2,600W continuous output (3,900W Power Lifting), fixed at native capacity with no expansion.β
techradar.com / amazon.com β Elite 400 review Β· 2026 Β· [mixed]
- B2
βCombines 3,840Wh LFP capacity, 3,900W surge, 70-minute fast charging, 15ms UPS protection, and a built-in trolley system β one of the most complete units at the 3,000Wh+ tier in 2026.β
backuppowerhub.com / cleantechnica.com β Elite 400 review Β· 2026 Β· [positive]
- B3
βA hefty ~86 lbs (39 kg), though reviewers note it's lighter than some competitors, with wheels and a trolley for mobility.β
notebookcheck.net / thesolarlab.com β Elite 400 review Β· 2026 Β· [mixed]
Research compiled November 4, 2026.
Who Should Buy Which
Buy the DELTA 3800 Gen4 if youβ¦
- βYou're wiring a real solar array. 2,000 W across two inputs, twice the Elite'sA5.
- βYou'll outgrow 3,840 Wh. It takes up to two extra batteries, and the Elite takes noneA6.
- βIt cycles every day. 6,000 cycles against 3,000 makes it the cheaper of the two to own over its life.
- βIt goes up and down stairs. 67.5 lb against 85.
Buy the Elite 400 if youβ¦
- βYou want backup now. The Elite 400 is on sale today, and the DELTA 4 (3800) ships in late NovemberA10.
- β3,840 Wh covers you. You get it for $800 less, with nothing to add later.
- βThe box lives on one floor. 85 lb on its own wheelsB3.
- βYou run car gear. It has a 12 V car socket, and the DELTA 4 (3800) has noneA3.
If neither fits
Something in your house runs on 240 V. Neither has a 240 V outlet, so a well pump or a dryer needs a split-phase home backup system instead.
The Bottom Line
Buy the Elite 400 if 3,840 Wh covers you. It's nearly the same battery, it rolls, and the difference stays in your pocket.
Pay for the DELTA 4 (3800) if you've got panels to feed it or batteries to add. Twice the solar input and an extra-battery port are the two things the Elite can never bolt on later.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
How much is the EcoFlow DELTA 4 (3800) in the US?
EcoFlow lists it at $2,199 on its US store and says it ships in late November. The BLUETTI Elite 400 sells for $1,399, which is $800 less.
Which has the bigger battery, the DELTA 4 (3800) or the Elite 400?
The Elite 400, by a little: 3,840 Wh against 3,763 Wh. Only the DELTA 4 (3800) can add extra batteries, and EcoFlow quotes 4 to 12 kWh in all.
Which one charges faster from solar?
The DELTA 4 (3800). It takes 2,000 W across two inputs at 11 to 60 V each, against 1,000 W on the Elite 400. You only see the difference with more than 1,000 W of panels.
Is the Elite 400 too heavy to move?
It's 85 lb, but it has wheels and a trolley handle, so it rolls on flat ground. The DELTA 4 (3800) is 67.5 lb with a handle at each end, and EcoFlow sells a cart for it separately.
Does the DELTA 4 (3800) last longer than the Elite 400?
On paper, yes. EcoFlow rates it for 6,000 cycles and BLUETTI rates the Elite 400 for 3,000. Drained daily, that's 16.4 years against 8.2.
Where to buy
EcoFlow DELTA 3800 Gen4
$2,199.00
$2,199.00 Β· direct from EcoFlow
BLUETTI Elite 400Pick
$1,399.00
$1,399.00 Β· direct from BLUETTI
Last checked 31 days ago. Prices move β check before you buy.
Prices may vary by retailer and are subject to change.