Head-to-head test
EcoFlow DELTA 3800 Gen4 vs Anker SOLIX F3800Half the Weight, Twice the Cycle Rating. Where's the Catch?
Nearly the same battery in a box half the weight, rated for twice the cycles. I'd buy the EcoFlow, unless something in your house runs on 240 V or your outage can't wait for it to ship.
Full profiles: EcoFlow DELTA 3800 Gen4 → · Anker SOLIX F3800 →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Spec deltas
Gunner’s take
Whole-Home Backup Tester
I went through both spec sheets, and the scale is where they split.
Anker's SOLIX F3800 holds 3,840 Wh and weighs 132.3 lb. EcoFlow's DELTA 4 (3800) holds 3,763 Wh and weighs 67.5 lbA7. That's nearly the same battery in about half the weight.
The weight Anker kept went into the inverter.
The F3800 runs 6,000 W, surges to 9,000 W and puts out 240 V, the voltage a deep well pump, an electric dryer or a feed into a home panel asks for. The DELTA 4 (3800) runs 3,600 W from 120 V outlets and surges to 7,200 WA2. Most of a house's 120 V loads fit under that with room left.
On paper, the EcoFlow also outlasts it.
EcoFlow rates the DELTA 4 (3800) for 6,000 cyclesA9, and Anker rates the F3800 for 3,000. A cycle is one full drain and refill, so at one a day that's 16.4 years against 8.2, twice the rated life. The catch is timing: EcoFlow ships it in late NovemberA10, and the F3800 is on sale now.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
weight
At 67.5 lb one adult can lift the DELTA 4 (3800) into a car with a straight back, and a cart takes care of the driveway. The F3800 is a two-person lift that goes where you park it. For a box that lives beside the fridge, that difference shows up once. For a box that goes to the cabin, it shows up every trip.
DELTA 4 (3800): 3,763 Wh at 67.5 lb, a handle at each endA7SOLIX F3800: 3,840 Wh at 132.3 lbEcoFlow sells a folding transport cart for it separatelyA7
Why it mattersIf it moves, buy the DELTA 4 (3800). If it parks for good, weight stops deciding anything.
rated cycles
Spread each price over the energy its rated cycles deliver and the DELTA 4 (3800) comes to $0.10 a kWh against $0.19 (on last listed price) for the F3800. Cycled daily, the F3800 reaches its rating in 8.2 years and the EcoFlow in 16.4. That only counts if the box works for a living, on solar or shaving a time-of-use bill, rather than waiting for two storms a year.
DELTA 4 (3800): 6,000 rated cyclesA9; SOLIX F3800: 3,000$2,199 against $2,200 (last listed price)3,763 Wh against 3,840 Wh
Why it mattersIf it will cycle every day, the DELTA 4 (3800) is the one still inside its rating when the F3800 has used up its own.
continuous output
A transfer switch lets a battery feed chosen circuits in your panel. On 120 V circuits, a fridge, a furnace blower, the router and lights sit comfortably inside 3,600 W. The loads it can't touch are the 240 V ones: a deep well pump, an electric dryer, a central air handler. That's where the F3800 earns its weight.
SOLIX F3800: 6,000 W continuous, 9,000 W surge, two 240 V outletsDELTA 4 (3800): 3,600 W continuous, 7,200 W surge, 120 V outlets onlyA2One F3800 owner runs everything, a water pump included, through a transfer switchB5
Why it mattersList your 240 V loads. If the list is empty, the F3800's extra inverter is nearly 65 lb you carry for nothing.
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 3,840 Wh at 132.3 lb: nearly the same battery at about half the weight.
weight
The F3800 parks. The DELTA 4 (3800) travels. Anker built the F3800 to sit beside a panel and stay there. The DELTA 4 (3800) is 67.5 lb with a handle at each end, and EcoFlow sells a folding cart for it separatelyA7.
Stairs settle it. I'd carry the DELTA 4 (3800) up a short flight by myself. I wouldn't try that with the F3800, and I wire houses for a living.
Lifetime Value
Selected because: 6,000 rated cycles against 3,000, on batteries within a sliver of each other.
Over a whole battery life, the DELTA 4 (3800) is the cheaper box to own. Spread each price over the energy its rated cycles deliver and the EcoFlow comes to $0.10 a kWh against $0.19 (on last listed price), about half the cost per kWh. The cycle ratings do all of that work, 6,000 against 3,000, on batteries within a sliver of each other.
It only pays if you cycle it. A box that waits at full charge for two outages a year will never get near 3,000 cycles, let alone 6,000. Run one off solar every day and the F3800 reaches its rating in 8.2 years, when the DELTA 4 (3800) is only halfway through its own.
What the Specs Don't Tell You
Selected because: The F3800 surges to 9,000 W against 7,200 W, and the switchover ratings are 20 ms against 10 ms.
rated cycles
For big motors, I'd still trust the F3800. It surges to 9,000 W against 7,200 W. A motor's startup spike rarely makes it onto the label, so for a well pump or a big shop compressor that ceiling decides whether it starts. The DELTA 4 (3800) still covers a fridge or a sump pump.
On switchover, the EcoFlow is quicker on paper. Switchover is the gap between the grid dropping and the battery taking the load. EcoFlow rates the DELTA 4 (3800) at no worse than 10 msA8 and Anker rates the F3800 at no worse than 20 ms, so a router rides through either and a desktop PC with unsaved work is where the faster rating counts. EcoFlow's FAQ also says it doesn't support HID, the USB link a UPS uses to tell a computer to shut downA8.
Growth Path
Selected because: Both take extra batteries, so growth doesn't split them. Which batteries they take might.
solar input
Both grow, and the EcoFlow grows into batteries other EcoFlow stations use. The DELTA 4 (3800) takes up to two extra batteries through EcoFlow's expansion adapter, either the DELTA Pro 3 battery or the DELTA 3 Max Plus batteryA6. EcoFlow quotes 4 to 12 kWh in allA6.
Anker's path stays inside Anker. The F3800 takes Anker's own expansion batteries. If you already own one of those EcoFlow batteries, that settles which box to grow. If you own neither, growth is a draw.
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.
Anker SOLIX F3800
Front panel
- 112 V car socketOutA 12 V car socket behind a cap, with its own button.
- 23× USB-C · 100 WOutUp to 100 W each.
- 32× USB-AOutTwo USB-A ports.
The AC outlets and the inputs are on the two sides, mapped below.
Photo: Anker · Product image, Anker SOLIX store · numbers and labels are ours. Port counts and the USB-C rating from our catalogue.
Outlet side
- 1NEMA 14-50 · 240 VOutA 240 V outlet that takes an EV charger or an RV’s 50 A cord directly, or a 14-50 cable to a transfer switch.
- 2L14-30R · 240 VOutA 240 V twist-lock, the usual plug for a transfer switch or a generator inlet box.
- 36× 120 V outletsOutSix T-slot 120 V outlets. All the AC outlets share the F3800’s 6,000 W.
Photo: Anker · Product image, via Adorama · numbers and labels are ours. Outlet types read by us from Anker’s picture and named on Anker’s product images; uses from Anker’s US F3800 guide; the count from our catalogue.
Input side
- 1Home panel portIn · OutA covered port marked with a house, for Anker’s Home Power Panel.
- 2AC inInThe AC charging inlet. Anker says a generator must be pure sine wave, and the input can start as low as 200 W.
- 32× XT-60 solar inInTwo XT-60 inputs, 11 to 60 V, up to 1,200 W each and 2,400 W in all.
- 4Battery portIn · OutA covered port for Anker’s BP3800 expansion battery.
Photo: Anker · Product image, via Adorama · numbers and labels are ours. Ports read by us from Anker’s picture; ratings and uses from Anker’s US F3800 guide.
Strengths & trade-offs
EcoFlow DELTA 3800 Gen4
Strengths
- +Lighter by 64.8 lb
- +Rated for 6,000 charge cycles — much longer battery lifespan
Trade-offs
- –Weaker inverter (-2,400W) limits appliance compatibility.
Anker SOLIX F3800
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Significantly heavier (+64.8 lbs), making it harder to move.
- –Very heavy unit that may be difficult for one person to lift.
- –Shorter-lived battery — 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 · 2 nights · needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
DELTA 3800 Gen4
Both cover the 2,100 Wh weekend. The DELTA 4 (3800) takes it because it's the one that fits in the car.
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 finish the 1,645 Wh night with more than 1,500 Wh left. Capacity doesn't split this pair.
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 several times over — capacity isn't the question here. What would separate them is fan noise, but SOLIX F3800 doesn't publish a figure, so there's nothing to hold it to. Only the DELTA 3800 Gen4 is still sold, so for a new buy it takes this by default; the SOLIX F3800 is worth weighing on weight and fan noise only if you already own one.
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
DELTA 3800 Gen4
The SOLIX F3800 at 132.3 lbs is not a take-along — it rolls off a truck bed if it travels at all, so this scenario belongs to the DELTA 3800 Gen4 by default — and it earns it, covering the 670Wh with 2,529Wh to spare. Capacity was never the SOLIX F3800's problem here; getting to a tailgate was.
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 one is solved by adding one.
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 0–217.6hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–43.5hHigh-Draw Appliances
These reveal the real limitsscale 0–3.3h¹ 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 EcoFlow DELTA 3800 Gen4
I'd buy the DELTA 4 (3800), unless your house has a 240 V load. It holds 3,763 Wh against 3,840 Wh, weighs 67.5 lb against 132.3 lb and carries a 6,000-cycle rating against 3,000, so over its rated life it costs about half as much per kWh, $0.10 against $0.19 (on last listed price). The F3800 answers with 6,000 W, a 9,000 W surge and 240 V outlets, which is what a deep well pump or an electric dryer needs, and it's on sale now while EcoFlow ships the DELTA 4 (3800) in late NovemberA10. A 240 V load, a big motor or an outage that can't wait flips the call to the F3800.
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
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): UPS, 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 SOLIX F3800 rates 4.5/5 (71st 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.
One Carries, One Parks
The DELTA 4 (3800) is 67.5 lb and the SOLIX F3800 is 132.3 lb, for 3,763 Wh against 3,840 Wh. One person can lift the first into a car. The second is a two-person lift that stays where it lands.
The F3800 Starts the Bigger Motors
The F3800 surges to 9,000 W, the DELTA 4 (3800) to 7,200 W. A well pump or a big compressor pulls its hardest at switch-on, and the ceiling is what decides whether it starts. The EcoFlow's higher ratio only means it runs further below its own limit.
UPS Switchover: ≤10ms vs ≤20ms
Both list a UPS mode, at different rated speeds. The DELTA 3800 Gen4 is rated ≤10ms — quick enough on paper that desktop PCs and routers should ride through, treating that as the rating it is. The SOLIX F3800 is rated ≤20ms — 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. 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.
Twice the Rated Cycles
The DELTA 4 (3800) is rated for 6,000 cycles and the F3800 for 3,000. At one cycle a day that's 16.4 years against 8.2. Two outages a year never get near either, so this counts only if the box cycles often.
SOLIX F3800: Noise Level Not Disclosed
The DELTA 3800 Gen4 publishes its noise level (40dB); the SOLIX F3800 doesn't publish one. That isn't evidence the SOLIX F3800 is louder — it means there's no figure to hold it to, and no way to compare the two on this without hearing them. If you're buying for a bedroom, a CPAP, or an apartment, treat the DELTA 3800 Gen4's 40dB as the only published number on the table — a spec-sheet figure, not a measurement — and look for hands-on reports of the SOLIX F3800 before deciding.
Full record above — the Test Desk pick is the DELTA 3800 Gen4.
Check DELTA 3800 Gen4 price →Ownership 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 SOLIX F3800 is no longer sold, so there is no price to work its cost per kWh from, and this comparison doesn't quote one. On what you can actually buy today, the DELTA 3800 Gen4 works out at $0.10/kWh over its rated life. If you already own the SOLIX F3800, the hardware comparison still holds: over its rated life the DELTA 3800 Gen4 delivers about 22,578 kWh and the SOLIX F3800 about 11,520 kWh.
Brand trust
EcoFlow
Ecosystem
Largest in portable power — 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 — 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 — Reddit r/Ecoflow_community (~31K members), multiple Facebook groups, and an official community forum
App experience
Rated 4.6/5 iOS (~8,400 ratings) · 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 — 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.
Anker
Ecosystem
7-8 SOLIX portable power stations across C-series (compact) and F-series (flagship), plus the X1 home energy system
Support
US-based support. Historically known for incredible no-hassle replacements, but recent reports describe AI-driven support agents giving generic responses and complex return logistics for heavy units (hazmat shipping). The Anker brand reputation is still strong, but SOLIX-specific support quality is trending down.
Community
Moderate — active Reddit (r/Anker, r/AnkerSOLIXCommunity) and growing. Benefits from Anker's massive consumer electronics brand awareness.
App experience
Rated 4.5/5 iOS (~1,100 ratings) · 4.3/5 Android
Unique strength
Parent brand trust from Anker's consumer electronics dominance. InfiniPower technology for long cycle life. Strong $/Wh value in the mid-size and larger units — the S2000, F2600 and C1000 are among the better buys per watt-hour in the catalog.
Worth knowing
Support quality appears to be declining from its historically excellent level. Firmware updates have removed features without warning. Expansion ecosystem is smaller than EcoFlow's.
Analyst note
EcoFlow positions itself as a mid-to-premium brand with stronger support infrastructure, while Anker 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 — 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.
SOLIX F3800
EXPANDABLESupports Anker expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 3,840Wh.
Accepts up to 2,400W of solar. Enough for a serious multi-panel array.
Generous port selection supports complex multi-device setups.
Expansion batteries are Anker-specific. You're investing in the Anker ecosystem.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Growth only counts if you can still buy in, and the SOLIX F3800 is no longer sold (Anker points owners to the SOLIX F3800 PLUS). That leaves the DELTA 3800 Gen4: it starts at 3,763Wh and takes EcoFlow expansion batteries, so the ceiling moves if your needs do. The SOLIX F3800's expandability still matters if you already own one, but it isn't a reason to pick it over the DELTA 3800 Gen4.
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 on November 4 and ships it in late NovemberA10, so everything on this page comes from EcoFlow's US store page and our own arithmeticA1A2A9.
I'd want to see its surge before I trusted it with a pump. Hypothetically, I'd put a 120 V well pump and a fridge on one transfer switch, let both motors start at once, and watch whether the 7,200 W surge EcoFlow listsA2 holds without a trip. That's the test that decides whether 120 V alone is enough for a house on a well.
“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
Anker SOLIX F3800
Owners like what the F3800 runs and fight its solar input. One runs everything through a transfer switch off a single 120 V outlet, a water pump includedB5. Several say the solar input is hard to match with panels other than Anker'sB1B2B14.
The smaller complaints are about heat and rattle. One owner backed the wall-charging rate down from 1,800 W because the cord got very hotB3. Another heard about a second of buzzing from a battery pack as a heavy load started, which Anker put down to a vibrating ferrite beadB6B7.
“I have been using the F3800 for a couple weeks now, using only a single 120V outlet into a reliance transfer switch and it runs everything I throw at it including a water pump.”
Sources
diysolarforum.com · thesolarlab.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]
- Owners consistently complain that the solar/DC input is restrictive, effectively locking users into pricier Anker-branded panels rather than generic arrays. [SOLIX F3800 · 4 entries]
- Fan/inverter noise is generally reported as quiet at idle but with occasional intermittent buzzing/rattling under load or fault conditions. [SOLIX F3800 · 3 entries]
- Anker support experiences are polarized — some owners report fast, responsive replacements while at least one reports being ignored after a major purchase. [SOLIX F3800 · 3 entries]
- A1
“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]
- 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]
- 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]
- A9
“Rated for 6,000 cycles (EcoFlow: "15+ years"). Charges at 32–113°F (0–45°C), runs at 14–113°F (−10–45°C). Wi-Fi and Bluetooth with the EcoFlow app. Warranty: 3 years plus a 2-year extension when registered in the EcoFlow app.”
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
“The solar input for charging is a pain, so much so that I'm only using it if there is no other way to charge the F3800.”
diysolarforum.com — 'Anker F3800 user reviews and opinions welcome' · 2024-07 · [negative]
- B2
“The limitations of the inputs make it very difficult to use solar panels other than Anker's panels, which are pricey for a "full up" config.”
diysolarforum.com — 'Anker F3800 user reviews and opinions welcome' · 2024-07 · [negative]
- B3
“if you charge the F3800 from a 120VAC wall outlet at full rate (1800 watts), the line cord gets very hot. I've backed off the charge rate to 600-800 watts.”
diysolarforum.com — 'Anker F3800 user reviews and opinions welcome' · 2024-07 · [negative]
- B5
“I have been using the F3800 for a couple weeks now, using only a single 120V outlet into a reliance transfer switch and it runs everything I throw at it including a water pump.”
diysolarforum.com — 'Anker F3800 user reviews and opinions welcome' · 2024-07 · [positive]
- B6
“I have 4 BP3800s and one of them made similar buzzing/rattling noise when a heavy AC load was starting up... only for around a second while inverter was ramping up.”
diysolarforum.com — 'Big issue with Anker Solix F3800 plus battery pack' · 2025-08 · [mixed]
- B7
“Anker support told me it was a ferrite bead vibrating inside the unit... This reduced the noise, initially. At some point, I moved the batteries around and now the noise is gone.”
diysolarforum.com — 'Big issue with Anker Solix F3800 plus battery pack' · 2025-08 · [mixed]
- B14
“other than the solar input problem having limited panel array choices to max out it's input capability it's a great unit so far.”
diysolarforum.com — 'Anker F3800 user reviews and opinions welcome' · 2024-07 · [mixed]
Research compiled November 4, 2026.
Who Should Buy Which
Buy the DELTA 3800 Gen4 if you…
- →You'll move it. 67.5 lb against 132.3 lb, for nearly the same battery.
- →Everything you'd back up runs on 120 V: a fridge, a furnace blower, the router and lights.
- →It will cycle often, on solar or every day. It carries a 6,000-cycle rating against 3,000.
- →A desktop PC sits on it. It's rated to switch over in no worse than 10 ms against 20 ms.
- →You own other brands' panels. Each of its two solar inputs takes 11 to 60 VA5.
Buy the SOLIX F3800 if you…
- →Something in the house runs on 240 V, like a deep well pump or an electric dryer.
- →Your biggest loads have motors. 9,000 W of surge against 7,200 W.
- →You need power before late November. EcoFlow ships the DELTA 4 (3800) thenA10, and the F3800 is on sale now.
- →It will sit on a transfer switch in the garage and never move.
If neither fits
If your day looks like Van Life Daily, neither covers it on one battery. That day needs 4,685 Wh and both fall short, so budget for an extra battery from the start.
The Bottom Line
If your house runs on 120 V, I'd buy the DELTA 4 (3800). It holds nearly the F3800's battery at about half the weight, with twice the rated cycles.
If you have a 240 V load, or the outage won't wait for late November, buy the F3800. EcoFlow ships the DELTA 4 (3800) thenA10. The F3800 does the heavier job and you can buy it today.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
How much is the DELTA 4 (3800) in the US, and when does it ship?
EcoFlow lists it at $2,199 on its US store. It went on sale on November 4, 2026, and EcoFlow says it ships in late November. The SOLIX F3800 sells for $2,200 (last listed price).
Which one is lighter?
The DELTA 4 (3800), at 67.5 lb against 132.3 lb for the SOLIX F3800. Their batteries are close: 3,763 Wh and 3,840 Wh.
Can the DELTA 4 (3800) run 240 V appliances?
No. Its outlets are 120 V only. The SOLIX F3800 has 240 V outlets for loads like a deep well pump or an electric dryer.
Which battery lasts more years?
On paper, the DELTA 4 (3800). EcoFlow rates it for 6,000 cycles and Anker rates the SOLIX F3800 for 3,000. At one full cycle a day, that's 16.4 years against 8.2.
Which one charges faster from solar?
The SOLIX F3800 accepts more, 2,400 W against 2,000 W. The DELTA 4 (3800) takes 1,000 W on each of two inputs at 11 to 60 V, while F3800 owners say its input is hard to match with other brands' panels.
Where to buy
EcoFlow DELTA 3800 Gen4Pick
$2,199.00
$2,199.00 · direct from EcoFlow
Anker SOLIX F3800
Replaced by the F3800 Plus
Prices may vary by retailer and are subject to change.