Head-to-head test
EcoFlow DELTA 3800 Gen4 vs EcoFlow DELTA ProMore Battery Than the DELTA Pro, 31.5 lb Lighter. Worth Paying More?
EcoFlow DELTA 3800 Gen4 vs EcoFlow DELTA Pro: the same 3,600 W output and 7,200 W surge, 163 Wh more battery, 31.5 lb less weight and 400 W more solar input, and both take extra batteries. The DELTA Pro costs less. Buy the DELTA 4 (3800) unless the box will sit still for occasional outages, where the lower price counts for more.
Black Friday · 23 days out
Price to beat:DELTA Pro $1,599
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 → · EcoFlow DELTA Pro →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Spec deltas
Gunner’s take
Whole-Home Backup Tester
The DELTA 4 (3800) out-specs the DELTA Pro almost everywhere except the price.
It holds 3,763 Wh against 3,600 Wh, weighs 67.5 lb against 99 lbA7 and runs the same 3,600 W with the same 7,200 W surge at 120 VA2. That's 163 Wh more battery and 31.5 lb less to lift.
The DELTA Pro's answer is money.
EcoFlow lists the DELTA 4 (3800) at $2,199A10; the DELTA Pro sells for $1,899, and it's cheaper per watt-hour of battery too. It also keeps a 12 V car socket, which the DELTA 4 (3800) lacksA3, and an RV outlet.
So the question is what the difference buys.
It buys a box one person can carry, 400 W more solar input across two inputsA5, and a battery rated to outlast the DELTA Pro's by 2,500 cycles. Whether that's worth it depends on how often the thing gets used, and that part I can answer below.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
cost / lifetime kWh
That only pays off if you actually cycle it. A box charged off panels every day at a cabin uses up the DELTA Pro's rating in under a decade. A box that waits in the garage for a few outages a year never gets near either number, and for that owner the $300 up front is the only figure that counts.
DELTA 4 (3800): rated for 6,000 cycles, about 16.4 years of daily cyclingDELTA Pro: rated for 3,500 cycles, about 9.6 years of daily cyclingCost per lifetime kWh: $0.10 for the DELTA 4 (3800), $0.15 for the DELTA Pro
Why it mattersDaily solar users should pay for the DELTA 4 (3800); occasional backup buyers can keep the difference.
weight
At 67.5 lb the DELTA 4 (3800) goes up a porch step in two hands. At 99 lb the DELTA Pro waits for a ramp or a second person, and the wheel reports may describe a sibling modelB0, so check the photos before counting on them. If the station lives on a shelf by the panel, none of this matters after delivery day.
DELTA 4 (3800): 3,763 Wh at 67.5 lb, a handle at each endA7DELTA Pro: 3,600 Wh at 99 lbReviews of the DELTA Pro line say its wheels and telescoping handle work best on flat, smooth groundB2
Why it mattersIf it moves between house, truck and cabin, the DELTA 4 (3800) earns its price on weight alone.
solar input
The DELTA 4 (3800) takes 400 W more from the roof, and its two separate inputs let you run two strings of panels pointed different ways, each on its own inputA5. On a day like that, the extra input closes the shortfall sooner.
DELTA 4 (3800): 2,000 W of solar over two inputs, 11 to 60 V eachA5DELTA Pro: 1,600 W of solarVan Life Daily needs 4,685 Wh: the DELTA 4 (3800) is 1,486 Wh short, the DELTA Pro 1,625 Wh short
Why it mattersIf panels are your main charger, the DELTA 4 (3800)'s solar side is worth more than its extra battery.
The specific dimensions that decide these two units — everything else is a tie.
Portability & Form Factor
Selected because: 3,763 Wh at 67.5 lb against 3,600 Wh at 99 lb: more battery for 31.5 lb less.
weight
I'd rather carry 67.5 lb than roll 99. The DELTA Pro line moves on built-in wheels and a telescoping handle that reviewers say work best on flat, smooth groundB2, though our research couldn't pin down which model those reviewers hadB0. The DELTA 4 (3800) has a handle at each end, and EcoFlow sells a folding cart for it separatelyA7.
The smaller box also fits where houses keep batteries. At 16.77 by 11.36 by 12.09 inches without handlesA7, it slides onto a utility-room shelf. In the houses I wire, a 99 lb box ends up on the floor, parked in front of the water heater.
Lifetime Value
Selected because: Rated for 6,000 cycles against 3,500, which is what the higher price buys if you cycle it often.
cost / lifetime kWh
Used hard, the DELTA 4 (3800) is the cheaper one to own. Over its rated life it works out to $0.10 per kilowatt-hour against $0.15 for the DELTA Pro, about two-thirds the cost, because 6,000 cycles spreads the price across far more energy. Both cycle ratings are the maker's minimums, and neither unit has been run to the end of one.
For a garage box, the math runs the other way. 3,500 cycles is about 9.6 years of charging every single day. A station that waits out a few storms a year will never get near either rating, and then the price up front is the number that matters.
What the Specs Don't Tell You
Selected because: Switchover is rated within 10 ms against no worse than 20 ms, and the two noise figures aren't published the same way.
rated cycles
On a grid drop, the DELTA 4 (3800) is quicker on paper. EcoFlow rates it to switch within 10 msA8 and the DELTA Pro at no worse than 20 ms, which is where picky desktop power supplies start to blink. Both are ceilings from the spec sheet, not lab readings.
Noise needs a meter, not a spec sheet. EcoFlow rates the DELTA 4 (3800) at 40 dB or less up to 1,800 W and 50 dB or less at the full 3,600 WA8, a ceiling under load. Our record gives the DELTA Pro 60 dB without saying at what load, and testing of the DELTA Pro line heard a high-pitched whine above 2,000 WB4, possibly on a sibling modelB0. I wouldn't choose between them on noise yet.
Growth Path
Selected because: Both take extra batteries, so growth doesn't split them. What you'd grow into does.
solar input
Both grow, but into different batteries. The DELTA 4 (3800) takes up to two of EcoFlow's current extra batteries, the DELTA Pro 3's or the DELTA 3 Max Plus's, and EcoFlow quotes 4 to 12 kWh in allA6. The DELTA Pro takes its own line of EcoFlow extra batteries, and our record carries no ceiling for it, so I won't guess one. If you already own DELTA Pro 3 batteries, the DELTA 4 (3800) can use them.
In the makers’ pictures
What you’d actually be living with
Every port, labelled
What plugs in where, and how much it takes
EcoFlow DELTA 3800 Gen4
Front panel
- 1USB-C · 140 WOutUp to 140 W (USB-PD up to 28 V at 5 A). The port for a laptop.
- 22× USB-C · 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 · 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.
- 54× 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 · Product image, EcoFlow Japan store · numbers and labels are ours. Ratings from EcoFlow’s US spec table; outlet shapes read by us from EcoFlow’s picture, taken of the Japanese unit, which shares the US panel.
Input side
- 12× Solar/DC in · 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 · 1,800 WIn100–120 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 · OutTakes up to two of EcoFlow’s DELTA 3 Max Plus or DELTA Pro 3 extra batteries; EcoFlow quotes 4–12 kWh.
Photo: EcoFlow · Product image, EcoFlow Japan store · numbers and labels are ours. Ratings from EcoFlow’s US spec table and the panel’s own printing.
EcoFlow DELTA Pro
Front panel
- 12× USB-A · 12 WOutTwo USB-A ports, up to 12 W each (5 V at 2.4 A).
- 22× USB-A · 18 WOutTwo fast-charge USB-A ports, up to 18 W each.
- 3USB-C · 100 WOutUp to 100 W, printed on the panel.
- 4USB-C · 100 WOutUp to 100 W, printed on the panel.
- 54× 20 A outletsOutFour T-slot 120 V outlets marked 20A MAX. All five AC outlets share 3,600 W continuous and a 7,200 W surge.
- 630 A RV outletOutA round RV outlet marked 30A MAX. A camper’s shore-power cord plugs straight in.
Not in either picture, by EcoFlow’s US specs: the car outlet (12.6 V, 10 A, 126 W), two DC5521 outputs (12.6 V, 3 A) and the Anderson port (12.6 V, 30 A). The inputs and battery ports are on the rear, mapped below.
Photo: EcoFlow · Product image, EcoFlow US store · numbers and labels are ours. Ratings printed on EcoFlow’s panel and listed in EcoFlow’s US store specs; output totals from our catalogue.
Rear panel
- 1Solar/car in · 1,600 WInThe solar and car-charging input: 11 to 150 V at 15 A, up to 1,600 W of solar, by EcoFlow’s US specs.
- 2Charge-speed switchInSwitches the AC charging speed.
- 3AC in · 1,800 WInThe X-Stream AC charging inlet: up to 1,800 W at 120 V, by EcoFlow’s US specs.
- 4Overload resetInA reset button printed OVERLOAD PROTECTION.
- 5Battery port 1In · OutTakes a DELTA Pro extra battery or EcoFlow’s Smart Generator, by EcoFlow’s US specs.
- 6Battery port 2In · OutA second port, for a second extra battery.
Photo: EcoFlow · Product render · numbers and labels are ours. Port names printed on EcoFlow’s render; ratings from EcoFlow’s US specs.
Strengths & trade-offs
EcoFlow DELTA 3800 Gen4
Strengths
- +Lighter by 31.5 lb
- +Larger battery capacity
- +Faster solar charging
- +Rated for 6,000 charge cycles — much longer battery lifespan
Trade-offs
- –No major technical downsides compared to rival.
EcoFlow DELTA Pro
Strengths
- +Costs $300 less
Trade-offs
- –Significantly heavier (+31.5 lbs), making it harder to move.
- –Very heavy unit that may be difficult for one person to lift.
- –Can receive complaints about fan noise under heavy load.
- –Shorter-lived battery — rated for 3,500 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 · 2 nights · needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
Either unit
A tie on capacity: the DELTA 4 (3800) uses 66% of its usable battery and the DELTA Pro 69%. Break it on weight. Only one of these goes into the car with one person.
Battery budget usedlower = more headroom
LOAD Phone Charger 15W×6h · LED Lights 40W×8h · Box Fan 75W×14h · CPAP Machine 40W×16h
SCN-02 · 8 hours · needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
Either unit
Both survive the blackout with similar margin, and both list a UPS mode — compare their stated switchover classes, and remember those are manufacturer ratings, not measurements.
Battery budget usedlower = more headroom
LOAD Fridge 150W×8h · Router + Modem 20W×8h · LED Lights (4 bulbs) 40W×6h · Phone Charger 15W×3h
SCN-03 · 8 hours · needs 320Wh
CPAP Overnight
Sleep therapy without interruption — the #1 medical use case
DELTA 3800 Gen4
A dead heat: a CPAP night uses 10% of either unit's usable battery. Noise can't break it, because the two noise ratings aren't published on the same terms. Break it on weight, or on price if the box never leaves the bedroom.
Battery budget usedlower = more headroom
LOAD CPAP Machine 40W×8h
SCN-04 · 8 hours · 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 — 140W on the DELTA 3800 Gen4 against 100W — which beats the inverter for convenience and wastes less energy.
Battery budget usedlower = more headroom
LOAD Laptop 60W×8h · External Monitor 30W×8h · Router + Modem 20W×8h · Phone Charger 15W×2h
SCN-05 · 4 hours · 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 — it's audible in the lulls between songs.
Battery budget usedlower = more headroom
LOAD Blender 400W×0.5h · LED TV (55") 80W×4h · Bluetooth Speaker 15W×4h · Phone Charger (×3) 45W×2h
SCN-06 · 24 hours · needs 4,685Wh
Van Life Daily
A full day of mobile living — the ultimate endurance test
Neither unit
Neither covers 4,685 Wh alone. The DELTA 4 (3800) comes closer, 1,486 Wh short against 1,625 Wh, and both take extra batteries to close the rest.
Battery budget usedlower = more headroom
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
The Load Test
RUNTIME = (Wh × 0.85) ÷ 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 — 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 sized →
Modeled from the spec record — same math as the tables below. Methodology
Runtime by appliance
Real-world runtime estimates for common appliances, modeled at 85% inverter efficiency.¹
Essentials
The basics you need runningscale 0–213.2hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–42.6hHigh-Draw Appliances
These reveal the real limitsscale 0–3.2h¹ Runtime = (capacity × 0.85) ÷ 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 — see methodology.
Conclusion
November 4, 2026
Verdict: the DELTA 3800 Gen4, on Power Score margin
I'd pay the extra for the DELTA 4 (3800), unless the box will sit still and rarely cycle. It matches the DELTA Pro's 3,600 W and 7,200 W surgeA2, holds 3,763 Wh against 3,600 Wh, weighs 67.5 lb against 99 lbA7, takes 2,000 W of solar against 1,600 WA5 and is rated for 6,000 cycles against 3,500. The DELTA Pro costs $300 less, keeps a car socket and an RV outlet, and has a record of outage use behind itB1B3. The DELTA 4 (3800) ships in late NovemberA10 with no field record yet, and for a garage box that rarely cycles the price gap is the honest tiebreak, which is why this stops at 6.
Today the DELTA Pro is $1,799, $100 under its typical $1,899. The verdict weighs typical prices, not today's. Prices checked 10 hours ago.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of November 4, 2026. The links below open EcoFlow's current price.
$2,199.00 · direct from EcoFlow
or check the DELTA Pro price$1,799.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · 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
ᵈ Derived: price ÷ rated capacity. See the data behind our comparisons →
Comparison ToolAdd more power stations, side by sideOpen Tool →How these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it — no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews — see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity × 0.85 inverter efficiency) ÷ 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 →Class ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews — 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 5★. Here, DELTA 3800 Gen4 rates 4.1/5 (48th percentile of 22 Home Backup-class units), and DELTA Pro rates 3.7/5 (24th percentile of 22 Home Backup-class units).
How the class ranking is computed →Test Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
More Battery, 31.5 lb Less
The DELTA 4 (3800) is 67.5 lb with 3,763 Wh inside. The DELTA Pro is 99 lb with 3,600 Wh. One is a lift for one person, the other a job for wheels.
DELTA Pro: 60dB Published
60dB is about as loud as a normal conversation. The DELTA 3800 Gen4 is rated 40dB, and the two are not the same kind of figure: the DELTA 3800 Gen4's is a MAXIMUM under heavy charge and discharge, while the DELTA Pro's is its maker's best case — so the real gap can only be wider than the numbers suggest: the DELTA 3800 Gen4's ceiling already sits below the DELTA Pro's floor. For most people, fan noise around 45dB and up is where sleep starts to suffer.
Faster on Paper
The DELTA 4 (3800) is rated to switch within 10 ms, the DELTA Pro no worse than 20 ms. Routers ride through either. A fussy desktop power supply is happier with the first. Both are ratings, not measurements.
Warranty: No Difference
Both units carry the same 5-year warranty, so coverage isn't a tiebreaker here. The DELTA 3800 Gen4's figure is a maximum rather than a guarantee — it depends on registering the unit in the EcoFlow app, which adds two years to a three-year standard term.
Battery Lifespan in Real Years
The DELTA 3800 Gen4 is rated for 6,000 cycles vs 3,500. In real life: at daily use, that's 16.4 vs 9.6 years. At weekend use (twice a week), it's 58 vs 34 years. After hitting the cycle limit, the battery doesn't die — it drops to ~80% of original capacity, which is still very usable.
Full record above — the Test Desk pick is the DELTA 3800 Gen4.
Check DELTA 3800 Gen4 price →or check the DELTA Pro priceOwnership Analysis
What happens after you buy — 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
│ warranty ends · Reaching the cycle rating means ~80% capacity remains — degraded, not dead.
Analyst note
The DELTA Pro is cheaper to buy, but the DELTA 3800 Gen4 is cheaper to own. At $0.10/kWh over its lifetime vs $0.15/kWh, the DELTA 3800 Gen4's higher cycle life and capacity make each dollar go further over the years.
Growth path
DELTA 3800 Gen4
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — 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.
DELTA Pro
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 3,600Wh.
Accepts up to 1,600W of solar. Enough for a serious multi-panel array.
Generous port selection supports complex multi-device setups.
Expansion batteries are EcoFlow-specific. You're investing in the EcoFlow ecosystem.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Both expand, so neither locks you out of growth — decide on capacity, price, and the rest, not the expansion checkbox.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3800 Gen4
Nobody owns a DELTA 4 (3800) yet. EcoFlow put it on sale in the US on November 4 and says it ships in late November, so this page runs on EcoFlow's spec table and FAQ plus our arithmeticA0A10.
I'd want to hear it at work before it went near a bedroom. If I had one, I'd run a space heater on high off it after dark and listen from the next room, because EcoFlow's quiet figure only covers loads up to 1,800 WA8 and nobody has put a meter on it yet.
“Capacity 3,763 Wh, LFP (LiFePO4) cells. EcoFlow sells it as the DELTA 3800 Gen4; buyers and the press call the pair the DELTA 4.”
Sources
us.ecoflow.co · jp.ecoflow.co
EcoFlow DELTA Pro
The DELTA Pro has the track record the new box lacks. Reviewers describe it running a fridge, lights and a space heater through outagesB1, and one leaned on it as primary backup across months of overnight outagesB3.
The consistent knock is fan noise under heavy load. Testing of the DELTA Pro line found a high-pitched whine above about 2,000 W and quiet running at lighter loadsB4. Our research couldn't confirm that test used this exact modelB0, so take it as character, not a measurement.
“Long regarded as a gold standard for home backup — designed for high-draw appliances and full-scale battery expansion, running home essentials like a fridge, lighting, and a space heater through outages.”
Sources
backuppowerhub.com · us.ecoflow.co · outdoorgearlab.com · bobvila.com · powerstationadvisor.com · robbsutton.com
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 · 12 entries]
- Established home-backup platform with wheeled portability and massive expandability; the consistent knock is fan noise under heavy load. [DELTA Pro · 3 entries]
- A2
“US 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.”
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A3
“AC 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.”
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A5
“Solar: two inputs, 11–60 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.”
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A6
“Extra 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 4–12 kWh of expandable capacity.”
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A7
“Weight 67.5 lb (30.6 kg); 16.77 × 11.36 × 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 (3–4 kWh and 3,600 W).”
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A8
“Switches to backup within 10 ms when the grid drops; EcoFlow's FAQ says it does not support HID communication. Noise by EcoFlow's figures: 40 dB or less at up to 1,800 W, 50 dB or less at the full 3,600 W. IP20.”
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A10
“On 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 ¥240,900.”
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- B1
“Long regarded as a gold standard for home backup — designed for high-draw appliances and full-scale battery expansion, running home essentials like a fridge, lighting, and a space heater through outages.”
backuppowerhub.com / us.ecoflow.com — EcoFlow DELTA Pro review · 2025-2026 · [positive]
- B2
“Heavy but wheeled — integrated wheels and a telescoping handle help move its considerable weight, though they work best on flat, smooth surfaces; a cart is needed for uneven ground.”
outdoorgearlab.com / bobvila.com — DELTA Pro-line review · 2025-2026 · [mixed]
- B3
“Reliable through extended outage use — served as primary backup across multiple overnight outages over months, powering essentials simultaneously; LFP battery rated for thousands of cycles and 10+ years of daily use.”
powerstationadvisor.com / robbsutton.com — DELTA Pro-line review · 2025-2026 · [positive]
- B4
“Not silent under heavy load — under 2000W-plus draws the fans emit a noticeable high-pitched whine that's distracting in a quiet room, though it runs quietly enough at lighter loads.”
outdoorgearlab.com — DELTA Pro-line noise testing · 2025-2026 · [negative]
Research compiled November 4, 2026.
Who Should Buy Which
Buy the DELTA 3800 Gen4 if you…
- →You'll move it. 67.5 lb against 99, with 163 Wh more inside.
- →You cycle it daily off solar. 6,000 rated cycles against 3,500, and 2,000 W of panel input across two inputsA5.
- →A desktop is on the circuit. Switchover is rated within 10 ms against no worse than 20 msA8.
- →You want to grow into current batteries. It takes up to two DELTA Pro 3 or DELTA 3 Max Plus extra batteriesA6.
Buy the DELTA Pro if you…
- →It will sit in one spot for the odd outage. The 99 lb only matters on delivery day, and the difference stays in your pocket.
- →You need a car socket. Our record lists a 12 V car outlet and an RV outlet on the DELTA Pro; the DELTA 4 (3800) has no car socketA3.
- →You need power before late November. The DELTA 4 (3800) doesn't ship until thenA10.
If neither fits
If you want to keep a whole house running, skip both. Neither has a 240 V outlet and both stop at 3,600 W, so a well pump, a dryer and a heat pump together want a split-phase home battery system instead.
The Bottom Line
If the box will move or cycle often, I'd pay the extra for the DELTA 4 (3800). It runs everything the DELTA Pro runs, with more battery, 31.5 lb less to lift and a longer rated life.
If it will sit in the garage for the odd storm, the DELTA Pro is the sensible buy. It does the same job for less money, and its weight only bites once.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the DELTA 4 (3800) more powerful than the DELTA Pro?
No, they're rated the same: 3,600 W continuous with a 7,200 W surge at 120 V. The DELTA 4 (3800) holds more battery, 3,763 Wh against 3,600 Wh, and weighs 67.5 lb against 99 lb.
How much does the DELTA 4 (3800) cost?
EcoFlow lists it at $2,199 on its US store, and it ships in late November. The DELTA Pro sells for $1,899, so it's the cheaper of the two.
Can the DELTA 4 (3800) use DELTA Pro extra batteries?
EcoFlow lists two compatible extra batteries for it: the DELTA Pro 3's and the DELTA 3 Max Plus's, up to two through an expansion adapter. The original DELTA Pro's extra batteries aren't on that list.
Which battery lasts longer, the DELTA 4 (3800) or the DELTA Pro?
EcoFlow rates the DELTA 4 (3800) for 6,000 cycles and the DELTA Pro for 3,500. At one full cycle a day, that's about 16.4 years against 9.6.
Where to buy
EcoFlow DELTA 3800 Gen4Pick
$2,199.00
$2,199.00 · direct from EcoFlow
EcoFlow DELTA Pro
$1,799.00
$1,799.00 · direct from EcoFlow
down from $1,899 · 5% below usual
Last checked 10 hours ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.