Head-to-head test
EcoFlow DELTA 3 Plus vs EcoFlow DELTA 3800 Gen4Double the Inverter, Double the Solar. Can the 3 Plus Catch Up?
Both of these grow with extra batteries, so the extra money buys the parts you can't bolt on later: twice the inverter and twice the solar intake. I'd buy the DELTA 4 (3800) to back up a house, unless it's going to travel with you.
Black Friday · 23 days out
Price to beat:DELTA 3 Plus $649
The lowest we have recorded. A Black Friday price above it is a sale this unit has already had.
Full profiles: EcoFlow DELTA 3 Plus → · EcoFlow DELTA 3800 Gen4 →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Spec deltas
Gunner’s take
Whole-Home Backup Tester
Both of these take extra batteries, so capacity isn't the argument.
The DELTA 3 Plus holds 1,024 Wh and the DELTA 4 (3800) holds 3,763 WhB1, and either can grow from thereB6. That leaves one question: what does the extra money buy that a battery can't?
My answer is the inverter and the solar port.
The DELTA 4 (3800) runs 3,600 W against 1,800 WB2 and takes 2,000 W of solar against 1,000 WB5. That's twice the inverter and twice the intake, and adding batteries to the 3 Plus changes neither one.
Per watt-hour, the bigger box is the cheaper one.
It's $2,199 against $719, on sale now at EcoFlow's US store and shipping in late NovemberB10. The 3 Plus is already on sale, which only matters if you need power in the next few weeks.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
continuous output
A house in an outage doesn't run one load at a time. The fridge compressor kicks on while the microwave runs and the furnace blower starts, and that's where 1,800 W runs out first. The DELTA 4 (3800) has another 1,800 W of headroom before anything has to wait, and twice the surge for the compressor's first second.
DELTA 3 Plus: 1,800 W continuous, 3,600 W surgeDELTA 4 (3800): 3,600 W continuous, 7,200 W surgeB2Both take EcoFlow extra batteries
Why it mattersIf several things in the house need to run together, the inverter is the part to pay for, because it's the part you can't add.
solar input
In a multi-day outage the sun is the only charger left, and a good solar window is a few hours around noon. Double the intake is the difference between a bank that's full by evening and one that isn't. Two inputs also let two separate sets of panels each feed their own portB5, so panels you already own don't have to match the new ones.
DELTA 3 Plus: 1,000 W solar inputDELTA 4 (3800): two solar inputs, 11 to 60 V, 1,000 W each, 2,000 W totalB5DELTA 4 (3800): 3,763 Wh
Why it mattersIf solar is your plan for long outages, the second input matters more than the bigger battery.
weight
A CPAP night or a tailgate never reaches most of the DELTA 4 (3800)'s battery, so on those trips you'd be hauling 40.5 lb of battery you don't use. The 3 Plus covers them and has room to spare.
DELTA 3 Plus: 27 lbDELTA 4 (3800): 67.5 lb, a handle at each end, folding cart sold separatelyB7CPAP Overnight needs 320 Wh; the 3 Plus finishes with 550 Wh left
Why it mattersIf the box rides in the car more than it sits by a panel, take the 3 Plus.
The specific dimensions that decide these two units — everything else is a tie.
Growth Path
Selected because: Both take extra batteries, so the question is what grows with them and what doesn't.
solar input
Both grow, but only one grows into a house system. The DELTA 4 (3800) takes up to two extra batteries through EcoFlow's expansion adapter, a DELTA Pro 3 battery or a DELTA 3 Max Plus battery, and EcoFlow quotes 4 to 12 kWh in allB6. The 3 Plus takes EcoFlow's extra batteries too, from a much lower floor.
What doesn't grow is everything around the battery. A 3 Plus with extra batteries still pushes 1,800 W and still fills through one 1,000 W solar port. For a cabin running lights and a fridge, that's fine. For a house that wants the microwave and the furnace blower at the same time, it's the wrong ceiling.
Runtime: Will It Power Your Gear?
Selected because: 3,763 Wh against 1,024 Wh, and twice the solar intake to fill it back up.
continuous output
On runtime alone, this isn't close. 3,763 Wh is more than three and a half times the 3 Plus's 1,024 Wh. Our blackout night needs 1,645 Wh, and the DELTA 4 (3800) finishes it with 1,554 Wh left, nearly a second night.
Refilling is where the second solar input earns its place. Each input takes 1,000 W at anything from 11 to 60 V, the voltage range the port acceptsB5. A 3 Plus grown to the same size fills through its one port at half the rate, and in a long outage the sun is the only charger left.
Your Life, Your Pick
Selected because: Neither finishes Van Life Daily. The 3 Plus also misses the blackout, the camping weekend and the workday.
The 3 Plus covers the short nights and misses the long ones. A CPAP night and a tailgate fit in both. The blackout, the camping weekend and the remote workday need more than the 3 Plus's 870 Wh usable, though the workday misses by only 40 Wh.
Van Life Daily beats both. At 4,685 Wh it leaves the DELTA 4 (3800) 1,486 Wh short. Both take extra batteries, so this is the one row where adding later is the plan for either box.
Portability & Form Factor
Selected because: 27 lb against 67.5 lb, two and a half times the weight.
weight
At 27 lb the 3 Plus is a carry. At 67.5 lb the DELTA 4 (3800) is a move. EcoFlow gives it a handle at each end and sells a folding cart separatelyB7. I'd get it from the garage to the kitchen by myself. I wouldn't plan a campsite around it.
Camping is where this gets awkward for the small box. The 3 Plus can't cover our 2,100 Wh camping weekend on its own battery, so the real choice there is 67.5 lb in one box or the 3 Plus plus extra batteries.
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 3 Plus
Front panel
- 12× USB-C · 140 WOutTwo USB-C ports, printed USB-C 140W: up to 140 W each by EcoFlow’s spec table. Enough for a big laptop.
- 22× USB-A · 36 WOutTwo USB-A ports printed FAST CHARGE, 36 W max by EcoFlow’s spec table.
- 36× AC outletsOutSix outlets, three two-prong and three T-slot, sharing 1,800 W and a 3,600 W surge. X-Boost runs devices up to 2,200 W.
Photo: EcoFlow · Product image, EcoFlow US store · numbers and labels are ours. Ratings printed on EcoFlow’s panel and listed in the spec table on EcoFlow’s US store page.
Rear panel
- 1Solar/car in · 500 WInPrinted SOLAR/CAR INPUT. An XT60 input, 11 to 60 V, up to 500 W of solar.
- 2Battery portIn · OutPrinted EXTRA BATTERY PORT. EcoFlow lists the DELTA 3, DELTA 2, DELTA 2 Max and DELTA Pro 3 extra batteries, connected by its Alternator Charger XT150 Output Cable, up to 5 kWh in all.
- 3AC in · 1,500 WInPrinted AC CHARGE. Charges at up to 1,500 W.
- 412 V car socket · 126 WOutA capped car socket, 12.6 V at 10 A, 126 W max.
- 52× DC5521 · 3 AOutTwo DC5521 barrel outputs, 12.6 V at 3 A max; 3A MAX is printed between them.
The inputs sit behind the flap, shown closed. EcoFlow’s spec table lists two solar inputs of 500 W each (1,000 W in all), but the flap marks only one, so where the second sits isn’t shown here. The DC ON/OFF button switches the car socket and the barrel ports.
Photo: EcoFlow · Product image, EcoFlow Canada store · numbers and labels are ours. Port names printed on EcoFlow’s panel; ratings and battery list from the spec table and product copy on EcoFlow’s US store page; the connector type from our catalogue.
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.
Strengths & trade-offs
EcoFlow DELTA 3 Plus
Strengths
- +Costs $1,480 less
- +Lighter by 40.5 lb
Trade-offs
- –Weaker inverter (-1,800W) limits appliance compatibility.
- –Shorter-lived battery — rated for 4,000 charge cycles vs the DELTA 3800 Gen4's 6,000, so it wears out sooner.
EcoFlow DELTA 3800 Gen4
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
- +Rated for 6,000 charge cycles — much longer battery lifespan
Trade-offs
- –Substantially more expensive (+$1,480) than the DELTA 3 Plus.
- –Significantly heavier (+40.5 lbs), making it harder to move.
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
DELTA 3800 Gen4
The 3 Plus runs 1,230 Wh short of the 2,100 Wh weekend. The DELTA 4 (3800) finishes with 1,099 Wh to spare, at two and a half times the weight.
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
DELTA 3800 Gen4
The 3 Plus covers about half of the 1,645 Wh night. The DELTA 4 (3800) finishes with 1,554 Wh left, nearly enough for a second.
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
Either unit
A CPAP is about 40W for eight hours, so both of these cover the night at least twice over — capacity isn't the question here. The only published difference is fan noise, and it can't settle this: the DELTA 3 Plus is rated 30dB and the DELTA 3800 Gen4 40dB, but the DELTA 3 Plus'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
LOAD CPAP Machine 40W×8h
SCN-04 · 8 hours · needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
DELTA 3800 Gen4
The DELTA 3 Plus comes up just short — it needs 910Wh and has 870Wh usable, a 40Wh gap (its nameplate 1,024Wh actually clears this — the flat 15% conversion allowance is what tips it under). Trim that much — one small appliance's worth across the day — and it finishes. The DELTA 3800 Gen4 covers it outright with 2,289Wh to spare.
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
DELTA 3800 Gen4
Both handle game day; the DELTA 3800 Gen4 keeps more in reserve (21% used vs 77%). Tailgating is a light load, though, so the number you'll feel is weight: 27 lbs for the DELTA 3 Plus against 67.5 lbs for the DELTA 3800 Gen4, from the trunk to the setup spot.
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 on its own battery. Both take extra batteries, so this is the one row where adding later is the plan for either.
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
For this load: DELTA 3800 Gen4 runs 15.6h vs 4.2h.
$2,199 list · direct from EcoFlow
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 buy the DELTA 4 (3800) to back up a house, and the 3 Plus to travel. Both take extra batteries, so the 3 Plus can catch up on watt-hours. It can't catch up on 3,600 W of output against 1,800 WB2, or on 2,000 W of solar against 1,000 W, because a battery adds neither. At $2,199 against $719, the DELTA 4 (3800) is also the cheaper of the two per watt-hour. What it costs you is 67.5 lb against 27, and a wait until it ships in late NovemberB10.
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 3 Plus price$719.00 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): CPAP, Camping.
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 3 Plus rates 4.3/5 (62nd percentile of 27 Everyday-class units), and DELTA 3800 Gen4 rates 4.1/5 (48th 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.
Two and a Half Times the Weight
The DELTA 4 (3800) weighs 67.5 lb and the 3 Plus 27 lb. One goes onto a back seat with one hand. The other is a two-hand lift you plan before you make it.
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 — they depend on registering the unit in the EcoFlow app, which adds two years to a three-year standard term. Worth saying because the per-dollar framing can suggest otherwise: the DELTA 3 Plus works out at 7 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 4,000. In real life: at daily use, that's 16.4 vs 11 years. At weekend use (twice a week), it's 58 vs 38 years. One caution reading years across different sizes: a cycle is 3,763Wh on the DELTA 3800 Gen4 and 1,024Wh on the DELTA 3 Plus, so count lifetime energy — roughly 22,578 kWh against 4,096 kWh over the rated life. 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 3 Plus 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 3 Plus is cheaper to buy, but the DELTA 3800 Gen4 is cheaper to own. At $0.10/kWh over its lifetime vs $0.18/kWh, the DELTA 3800 Gen4's higher cycle life and capacity make each dollar go further over the years.
Growth path
DELTA 3 Plus
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 1,024Wh.
Accepts up to 1,000W 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.
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.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Both expand, but the DELTA 3800 Gen4's higher solar ceiling (2,000W vs 1,000W) gives it the stronger off-grid growth path — more panels can feed a bigger bank as it grows.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3 Plus
Reviewers like the 3 Plus's charging and its switchover, and they don't like its fans. Coverage praises fast recharging and a switchover under 10 ms when the grid dropsA3. The fans are the recurring complaint: they come on at light loads and cycle erraticallyA1A2, and one reviewer worries that raises the risk of overheating under heavy loadsA2.
It may be fixable. Reviewers expect EcoFlow to sort the fan behavior in a software update, as it has on other unitsA4.
“Otherwise well-designed, with very fast recharge times and a seamless sub-10ms UPS switchover for uninterrupted power.”
Sources
thesolarlab.com
EcoFlow DELTA 3800 Gen4
Nobody owns a DELTA 4 (3800) yet. It went on sale at EcoFlow's US store on launch day and ships in late November, so everything here is EcoFlow's own spec page plus our arithmeticB1B5B10.
I'd want to hang two different panels on its two inputs on a hazy afternoon, one per port, and watch whether it really pulls from both at once the way EcoFlow's spec page describesB5. That's the feature this page leans on, and nobody has tested 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
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- The DELTA 3 Plus's headline weakness is fan behavior — fans run even at low load and cycle erratically, undercutting its quiet-UPS marketing. [DELTA 3 Plus · 3 entries]
- 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]
- A1
“Marketed as near-silent, but real-world fan performance is a significant flaw: the fans activate even under low loads and cycle on and off erratically, which limits its effectiveness as a quiet UPS.”
T3 — EcoFlow DELTA 3 Plus review: Lightning-fast charging with a noisy flaw; thesolarlab.com — DELTA 3 Plus Review · 2026 · [negative]
- A2
“Part of why it stays quiet is that the internal fans aren't always doing their job properly — the erratic cycling raises the risk of the unit overheating when running heavy loads.”
thesolarlab.com — EcoFlow DELTA 3 Plus Review: Amazing, but One Big Quirk? · 2026 · [negative]
- A3
“Otherwise well-designed, with very fast recharge times and a seamless sub-10ms UPS switchover for uninterrupted power.”
T3 / thesolarlab.com — DELTA 3 Plus reviews · 2026 · [positive]
- A4
“Reviewers note EcoFlow should be able to resolve the fan behavior with a software update, as it has done for other power stations after release.”
thesolarlab.com — DELTA 3 Plus Review · 2026 (dated claim — may be partially addressed by firmware) · [mixed]
- B1
“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.”
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- B2
“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]
- B3
“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]
- B5
“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]
- B6
“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]
- B7
“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]
- B10
“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]
Research compiled November 4, 2026.
Who Should Buy Which
Buy the DELTA 3 Plus if you…
- →It'll travel. 27 lb against 67.5, and a CPAP night or a tailgate fits with room left.
- →You need power before it ships. The DELTA 4 (3800) ships in late NovemberB10; the 3 Plus is on sale now at $719.
- →You want to start small and add EcoFlow's extra batteries as the budget allows.
- →Your loads are light: lights, a router, phones and a laptop, all well inside 1,800 W.
Buy the DELTA 3800 Gen4 if you…
- →It'll back up a house, where the fridge, the microwave and the furnace blower can all want power at once. It runs 3,600 W against 1,800 W.
- →Solar is your outage plan. Two inputs take 2,000 W against the 3 Plus's 1,000 W.
- →You'll grow it big. EcoFlow quotes 4 to 12 kWh with extra batteriesB6.
- →It'll feed a heavy cord. One of its five outlets is a 30 A twist-lock, the kind of plug that locks in and won't work looseB3.
If neither fits
If you'd run a 240 V well pump or an electric dryer, close this tab. Neither has a 240 V outlet, however many batteries you add. Look at a station that has one, like the Anker SOLIX F3800.
The Bottom Line
For a house, I'd buy the DELTA 4 (3800). Both take extra batteries, but only one has the inverter and the solar intake a house leans on, and those don't come in a box you add later.
For a car, a campsite, or power before it ships, buy the 3 Plus. It's less than half the weight, and it can still grow.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
How much does the EcoFlow DELTA 4 (3800) cost in the US?
EcoFlow lists it at $2,199 on its US store, where it went on sale on November 4, 2026 and ships in late November. The DELTA 3 Plus is $719.
Can I add batteries to the DELTA 3 Plus instead?
Yes. The DELTA 3 Plus takes EcoFlow's extra batteries. They add capacity but not output: it still runs 1,800 W and takes 1,000 W of solar, against 3,600 W and 2,000 W on the DELTA 4 (3800).
What extra batteries work with the DELTA 4 (3800)?
Up to two, through EcoFlow's expansion adapter: the DELTA Pro 3 extra battery or the DELTA 3 Max Plus extra battery. EcoFlow quotes 4 to 12 kWh of capacity in all.
How much solar can the DELTA 4 (3800) take?
Up to 2,000 W, across two inputs that each take 1,000 W at 11 to 60 V. The DELTA 3 Plus takes 1,000 W.
Which one is better for camping?
The DELTA 3 Plus is far easier to carry, at 27 lb against 67.5 lb, but it can't cover our 2,100 Wh camping weekend on its own battery. The DELTA 4 (3800) covers it with 1,099 Wh to spare.
Where to buy
EcoFlow DELTA 3 Plus
$719.00
$719.00 · direct from EcoFlow
Last checked 31 days ago. Prices move — check before you buy.
EcoFlow DELTA 3800 Gen4Pick
$2,199.00
$2,199.00 · direct from EcoFlow
Prices may vary by retailer and are subject to change.