Head-to-head test
EcoFlow DELTA Pro Ultra vs Anker SOLIX F3800 PLUS
The DELTA Pro Ultra costs more on the day and less per kWh over a full rated life. The F3800 Plus answers with a lower price, more outlets and a lighter build.
Full profiles: EcoFlow DELTA Pro Ultra β Β· Anker SOLIX F3800 PLUS β
Looking for a different matchup? EcoFlow DELTA Pro Ultra vs Anker SOLIX F3800
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Spec deltas
In Boulder Creek an outage is rarely one evening. It's two or three days while crews clear trees off the lines, so I judge these two by what's left on day three. Both get through a night easily.
The DELTA Pro Ultra holds 6,144Wh to the F3800 Plus's 3,840Wh, and its inverter is the bigger one too. Both are home units, well past anything you'd carry, and both take extra batteries later.
The Ultra costs $1,599 more up front. Its battery is rated for more cycles and stores more per cycle, so over its rated life it comes to $0.20 per kWh against $0.23. The F3800 Plus answers with more outlets and a lighter build.
What the Numbers Reveal
Each conclusion stated first β the numbers behind it on one line, the full analysis below.
continuous output
Routers, fridges and most electronics ride through 20ms. A few fussy desktop power supplies sit right at that line. Both are makers' ratings, not stopwatch results.
EcoFlow classifies the DELTA Pro Ultra's switchover as no-breakThe SOLIX F3800 Plus is rated no worse than 20msB3The DELTA Pro Ultra outputs 7,200W continuous against the F3800 Plus's 6,000W
Why it mattersFor a desktop and a Starlink dish kept alive through a cut, the Ultra's rating is the safer one. For lights and a fridge, either works.
cost / lifetime kWh
That figure assumes every rated cycle gets used, which takes about 9.6 years of daily drains on the Ultra. Both cycle ratings are floors, so either may last longer.
The DELTA Pro Ultra comes to $0.20 per lifetime kWh against the F3800 Plus's $0.23The DELTA Pro Ultra is rated for 3,500 cycles against the F3800 Plus's 3,000The DELTA Pro Ultra costs $1,599 more upfront
Why it mattersIf you'll cycle it most days for years, the Ultra's price spreads further. If $2,600 is the most you can spend, that maths doesn't help you.
solar input
The solar gap is mostly about how big an array you can hang on each one.
The DELTA Pro Ultra accepts 5,600W of solar input against the F3800 Plus's 3,200WThe DELTA Pro Ultra weighs 181.8 lbs against the F3800 Plus's 132.3 lbs
Why it mattersIf you're wiring a big roof array, the Ultra has room for more of it. If the unit has to move now and then, the F3800 Plus is about 50 pounds less to shift.
The specific dimensions that decide these two units β everything else is a tie.
Lifetime Value
Selected because: The dearer unit is the cheaper one per stored kWh, on the same warranty.
cost / lifetime kWh
You collect the lower lifetime rate only by using the cycles. At weekend pace both ratings run for decades.
Warranty doesn't split them. On a unit that may stay wired to a house for a decade, 5 years is half its working life.
PowerScore Breakdown
Selected because: The Ultra's lead traces to capacity, continuous output and surge, which matter when heavy loads stack.
overall power score
The Ultra's lead in our power score comes from three places. It has more capacity, 1,200W more continuous output, and a bigger surge allowance, the short burst a motor needs to start. Owners say its 7,200W inverter will run a 3-ton central ACA4.
The F3800 Plus isn't short of power. Its 6,000W covers most household appliances, a fridge and a window AC included. The gap shows when heavy loads stack. If my deep-well pump and the fridge kicked on in the same second, I'd want the Ultra's extra margin.
What the Specs Don't Tell You
Selected because: Weight, switchover rating and the missing Anker noise figure are the practical differences.
rated cycles
Neither of these is grab-and-go. The F3800 Plus weighs 132.3 pounds on wheels, a two-person job on stairs. The Ultra weighs 181.8 pounds in total, split across separate boxes, so no single lift is that heavy.
One reviewer found the F3800 Plus's rear wheels fine on grass and stopped by small bumpsB8. Early reviews also flagged its idle drain, the power a unit uses just by being on. Anker says a firmware update cut that by about half, which we couldn't confirm with a second sourceB9.
Your Life, Your Pick
Selected because: The heaviest daily load is the one the F3800 Plus cannot finish; the blackout row shows the day-three gap.
The camping and tailgate rows don't really apply. Neither unit travels, and both finish those loads with plenty left.
Both finish the 8-hour blackout. The Ultra has enough left for about two more nights like it, and the F3800 Plus has nearly enough for one. For a canyon where outages run long, I'd buy the Ultra.
The heaviest daily load we model, at 4,685Wh, is where they part. The Ultra covers it with 537Wh to spare. The F3800 Plus runs out 1,421Wh short.
Brand Trust
Selected because: EcoFlow's deeper range against Anker's better-known name, with mixed support reports on both.
EcoFlow has the bigger range and the bigger owner community. Anker's name carries trust from years of chargers and cables, and its expansion range is the smaller one.
Strengths & trade-offs
EcoFlow DELTA Pro Ultra
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
Trade-offs
- βSubstantially more expensive (+$1,599) than the SOLIX F3800 PLUS.
- βSignificantly heavier (+49.5 lbs), making it harder to move.
- βVery heavy unit that may be difficult for one person to lift.
Anker SOLIX F3800 PLUS
Strengths
- +Costs $1,599 less
- +Lighter by 49.5 lb
Trade-offs
- βWeaker inverter (-1,200W) limits appliance compatibility.
- βVery heavy unit that may be difficult for one person to lift.
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
Neither unit
Scoring these two at a campsite is a category error: neither travels β the DELTA Pro Ultra is 181.8 lbs and the SOLIX F3800 PLUS 132.3 lbs, and at those weights they roll off a truck bed if they go anywhere at all. The 2,100Wh here is trivial for either β it's the going that doesn't happen. If you need power away from the building, you're shopping the wrong class.
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
DELTA Pro Ultra
Both survive the night. The DELTA Pro Ultra finishes at 31% used with 3,577Wh left β 2.2 more nights like it. The SOLIX F3800 PLUS finishes at 50% with 1,619Wh, 98% of a second night. If your outages tend to run past one evening, that difference is the whole argument between them.
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. What would separate them is fan noise, but SOLIX F3800 PLUS doesn't publish a figure, so there's nothing to hold it to. Buy on price, weight, and whether you can live with a fan you haven't heard.
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
DELTA Pro Ultra
The DELTA Pro Ultra clears the workday at 17% used, banking 4,312Wh β late work, extra calls, or a second laptop charge without arithmetic. The SOLIX F3800 PLUS at 28% also finishes, with 2,354Wh of slack for the unplanned.
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
Neither unit
Scoring these two at a tailgate is a category error: neither travels β the DELTA Pro Ultra is 181.8 lbs and the SOLIX F3800 PLUS 132.3 lbs, and at those weights they roll off a truck bed if they go anywhere at all. The 670Wh here is trivial for either β it's the going that doesn't happen. If you need power away from the building, you're shopping the wrong class.
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
DELTA Pro Ultra
The SOLIX F3800 PLUS doesn't finish β 3,264Wh usable against the 4,685Wh this needs leaves it 1,421Wh short, about 69% of the scenario covered. The DELTA Pro Ultra covers it with 537Wh to spare.
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
For this load: DELTA Pro Ultra runs 25.5h vs 15.9h.
$4,199 list Β· direct from EcoFlow
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 0β348.2hComfort & Convenience
Makes off-grid life actually enjoyablescale 0β69.6hHigh-Draw Appliances
These reveal the real limitsscale 0β5.2hΒΉ 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
October 25, 2026
Verdict: the DELTA Pro Ultra, on Power Score margin
Buy the DELTA Pro Ultra if you can stretch to it. It holds more and runs more, on the same 5-year warranty as the F3800 Plus. Spread over its rated life it comes to $0.20 per kWh against $0.23. The F3800 Plus is the right call if $2,600 is your ceiling and one tank covers your usual outage. It also has six AC outlets to the Ultra's four, plus a 12V car port the Ultra lacks.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of October 25, 2026. The links below open EcoFlow's and Anker's current prices.
$4,199.00 Β· direct from EcoFlow
Last checked 28 days ago. Prices move β check before you buy.
or check the SOLIX F3800 PLUS price$2,599.99 list
Written by Gunner Gustafson, Whole-Home Backup Tester Β· Station Arena Test Desk Β· Updated October 25, 2026
Black Friday Β· 26 days out
Prices to beat:DELTA Pro Ultra $3,989SOLIX F3800 PLUS $2,300
The lowest we have recorded for each. A Black Friday price above it is a sale that unit has already had.
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): RV Living, Solar Generator.
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 Pro Ultra rates 4.9/5 (95th percentile of 20 Home Backup-class units), and SOLIX F3800 PLUS rates 4.4/5 (63rd percentile of 20 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.
Weight Reality Check
Neither unit is grab-and-go. The SOLIX F3800 PLUS (132.3 lbs) is a two-person lift. The DELTA Pro Ultra (181.8 lbs) is spread across its boxes β no single lift, but nothing you reposition on a whim. That's a 50 lb difference, and it is paid once β getting the heavier one into position, not every time you move it.
No-break rating against 20ms
EcoFlow classifies the Ultra as no-break, meaning the load shouldn't see the grid drop. The F3800 Plus is rated no worse than 20ms. Routers and fridges won't notice either. A fussy desktop power supply might notice the second. Both are makers' ratings, not lab results.
Warranty: No Difference
Both units carry the same 5-year warranty, so coverage isn't a tiebreaker here. Worth saying because the per-dollar framing can suggest otherwise: the SOLIX F3800 PLUS works out at 1.9 years of cover per $1,000 spent against the DELTA Pro Ultra's 1.2, but that spread is the price gap, not the terms.
Anker didn't print a noise figure
EcoFlow lists 30dB for the Ultra, a best-case spec-sheet number. Anker lists nothing for the F3800 Plus. A reviewer who used both called the Anker quieter than expected and a step behind the Ultra. That's one pair of ears, so weigh it only if the unit sits near a bed.
Full record above β the Test Desk pick is the DELTA Pro Ultra.
Check DELTA Pro Ultra price βor check the SOLIX F3800 PLUS 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 SOLIX F3800 PLUS is cheaper to buy, but the DELTA Pro Ultra is cheaper to own. At $0.20/kWh over its lifetime vs $0.23/kWh, the DELTA Pro Ultra'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
EcoFlow support reports are split between painless prepaid-label replacements and long waits. It offers no parts or service once the warranty ends.
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 β 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) Β· 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 β the S2000, F2600 and C1000 are among the better buys per watt-hour in the catalog.
Worth knowing
Anker's name is strong, but SOLIX support reports describe generic automated replies, and firmware updates have removed features without warning.
Analyst note
Both support lines have fast and frustrating stories on record.
Growth path
DELTA Pro Ultra
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit β useful if your needs may climb past 6,144Wh.
Accepts up to 5,600W 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 PLUS
EXPANDABLESupports Anker expansion batteries, so you can add capacity later without replacing the base unit β useful if your needs may climb past 3,840Wh.
Accepts up to 3,200W 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 β see methodology
Analyst note
Both expand, but the DELTA Pro Ultra's higher solar ceiling (5,600W vs 3,200W) gives it the stronger off-grid growth path β more panels can feed a bigger bank as it grows.
What Owners Report
Patterns from published owner reports and long-term reviews β every claim cited to its source below.
EcoFlow DELTA Pro Ultra
Our research on the Ultra comes mostly from EcoFlow and from retailer and reviewer sites rather than owner forumsA0. Owners call it a powerful, easy whole-home backup with quick setup, strong solar input and good app monitoringA4.
EcoFlow says it charges at up to 8,800W, enough to top up two batteries in about 2 hours, and runs silent under 2,000W of drawA3. Its cells are rated past 3,500 cycles to 80%, which EcoFlow puts at a decade or moreA2.
β6,144Wh per battery with 7,200W continuous output (10.8kW surge), expandable to 90kWh across a system for a household β over 30 days of essential backup.β
Sources
ecoflow.com Β· homedepot.com Β· autoboosting.com Β· ecogadgethub.com
Anker SOLIX F3800 PLUS
Owner-forum material on the F3800 Plus is thin. Most of what we found comes from reviewers who used it for weeks or monthsB0. They describe quiet fans under normal loads that get louder above about 4,000W or at full-speed chargingB10, and an app that's easy to set upB13.
Runtime falls fast with load. One review estimated about 17 hours with a fridge or freezer, laptops and phonesB4, and got a little over seven hours with a fridge and a freezer running togetherB5. One owner reported a loud noise and more than five unanswered support emailsB1. A reply in the same thread praised fast advance replacement, though it may describe the older F3800B2.
βI've called them and submitted tickets via their portal, always very responsive. They've even done advanced replacement for me.β
Sources
campingsolar.us Β· cleanenergybusinesscouncil.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
- Whole-home scale (to 90kWh), 7,200W output, online UPS, silent operation under load, and industry-fast charging are the standout features. [DELTA Pro Ultra Β· 2 entries]
- Owner support experiences with Anker/Solix diverge sharply β some report being ghosted after repeated contact attempts over a hardware fault, while others describe fast, responsive advanced-replacement service. [SOLIX F3800 PLUS Β· 2 entries]
- Real-world runtime drops off steeply with load: light loads (lights, router, occasional laptop/e-bike charging) stretch toward the ~17-hour mark, but running a fridge and freezer together drains the base unit in around 7 hours. [SOLIX F3800 PLUS Β· 2 entries]
- Fan noise is reported as low/background during normal household loads and only becomes noticeably audible under heavy loads (4,000W+) or max-speed charging. [SOLIX F3800 PLUS Β· 2 entries]
- The unit's near-137 lb weight is a recurring friction point: reviewers note the wheels/handles work for moderate use but struggle over rough terrain, and aggregated user feedback flags portability and packaging as concerns despite praise for raw performance. [SOLIX F3800 PLUS Β· 2 entries]
- A2
βLFP chemistry rated for over 3,500 cycles to 80% (10+ years of use).β
ecoflow.com / autoboosting.com β DELTA Pro Ultra review Β· 2026 Β· [positive]
- A3
βIndustry-fast 8,800W charging tops up two batteries in about 2 hours; an online UPS protects sensitive electronics round the clock, and it runs at 0 dB (silent) for draws under 2,000W.β
ecoflow.com / ecogadgethub.com β DELTA Pro Ultra review Β· 2026 Β· [positive]
- A4
βOwners call it a powerful, easy-to-use whole-home backup with quick setup, strong solar input, and good app monitoring; its 7,200W inverter can power a 3-ton central AC.β
homedepot.com owner reviews β DELTA Pro Ultra Β· 2026 Β· [positive]
- B1
βI think it may be a fire hazard with this crazy noise it's making. I have emailed Anker support over 5 times... Anker support is ghosting me after I spent over 20k on their solix line and solar panels within a month.β
DIY Solar Forum β "Big issue with Anker Solix F3800 plus battery pack (Large Anker Solix setup)" Β· 2025-08 Β· [negative]
- B2
βI've called them and submitted tickets via their portal, always very responsive. They've even done advanced replacement for me.β
DIY Solar Forum β "Big issue with Anker Solix F3800 plus battery pack (Large Anker Solix setup)" (reply from another Solix owner) Β· 2025-08 Β· [positive]
- B3
βIn UPS mode, the F3800 Plus can switch in about 20ms. There's more cabling and components when connected to the whole home setup, but the lights still barely flicker.β
Android Authority β "Anker SOLIX F3800 Plus with Home Power Panel review: Total power backup" Β· 2025-05 Β· [positive]
- B4
βYou would be able to keep a fridge or freezer running, charge a few laptops or phones, maybe charge up an e-Bike and the F3800 Plus base unit would last about 17 hours before needing a recharge.β
Digital Trends β "Anker Solix F3800 Plus review: this power station wins for versatility and value" Β· 2025-05 Β· [positive]
- B5
βWith both the freezer and my fridge plugged in at the same time, I was about to get 7.34 hours before the unit was completely drained.β
Digital Trends β "Anker Solix F3800 Plus review: this power station wins for versatility and value" Β· 2025-05 Β· [mixed]
- B8
βThe big wheels in the back are enough to go over grassy terrain, but avoid anything too challenging. Small bumps can be enough to slam everything to a halt.β
AppleInsider β "Anker Solix F3800 Plus portable power station review: investment in reliable home power" Β· 2025-08 Β· [mixed]
- B9
βEarly reviews focused heavily on the standby drain of the Anker SOLIX F3800 Plus. Anker later released a firmware update that said it can cut idle use by about 50%.β
VoltNest β "Anker SOLIX F3800 Plus Review: My Honest Test Results" Β· 2026-04 Β· [mixed]
- B10
βUnder normal loads (lights, fridge, TV), the fans are barely audible. It only gets loud when you're pulling over 4,000W or charging at max speed.β
CampingSolar.us β "Anker SOLIX F3800 Plus Review: The Ultimate 240V Home & RV Power" Β· 2026-02 Β· [positive]
- B12
βIt doesn't match the whisper-quiet performance of the EcoFlow Delta Pro Ultra, which remains one of the quietest power stations we've ever tested, but the F3800 Plus is still surprisingly quiet, even when you're really pushing it.β
TheSolarLab β "Anker SOLIX F3800 Plus Review: Big Power, Big Price?" Β· unknown Β· [positive]
- B13
βSetting it up was surprisingly easy... Within minutes, I could see everything on the Anker appβcharging input, battery percentage, power usage by device.β
ProudHomemaker β "Is the Anker SOLIX F3800 Plus Worth It? Here's What You Need to Know" Β· 2025-05 Β· [positive]
Research compiled October 25, 2026.
What Owners Actually Report
Drawn from 108 comments on independent review channels β not from retailer reviews, which skew to the first week of ownership. Each line is our summary of one commenter's claim, linked to the original. We record what they said, including where it contradicts the spec sheet.
EcoFlow DELTA Pro Ultra
144 claims from 88 comments Β· 100 from owners Β· 35 with figures
- Price & value
- 22 Β· 18% negative
- Runtime
- 16 Β· 0% negative
- Expandability
- 17 Β· 16% negative
- Charging
- 11 Β· 4% negative
- Other
- 18 Β· 19% negative
What owners complain about
A second battery bought separately adds $1900, roughly doubling the cost.
Expandabilitymeasuredowner5 agreedsource β
After firmware updates max solar charging dropped from 7kW to 3.5kW.
App & firmwaremeasuredowner5 agreedsource β
Still charges at 7kW from a generator, so the cap looks solar-specific.
Solar inputmeasuredowner5 agreedsource β
What owners praise
Charges at 6000W from a gas generator, hitting 100% in a little over 3 hours with some sun.
Chargingmeasuredowner36 agreedsource β
Costco deal gave him the DPU with two batteries, 12kWh, for $4,500.
Price & valuemeasuredowner53 agreedsource β
Delivered with batteries manufactured less than 90 days earlier.
Shippingmeasuredowner53 agreedsource β
Anker SOLIX F3800 PLUS
32 claims from 20 comments Β· 18 from owners Β· 4 with figures
- Solar input
- 4 Β· 0% negative
- Price & value
- 3 Β· 44% negative
- Expandability
- 5 Β· 77% negative
- Charging
- 4 Β· 15% negative
- Inverter & surge
- 3 Β· 88% negative
What owners complain about
F3800 Plus shuts down above 20A charging from the battery expansion port; 16A is stable.
Expandabilitymeasuredowner1 agreedsource β
Could not start two 240V hoist pumps or a well pump; motors shudder and the unit shuts off.
Inverter & surgeowner4 agreedsource β
Returned within 48 hours; would only have kept it at half the price.
Price & valueowner4 agreedsource β
What owners praise
Anker tech support was friendly, a native English speaker, and taught him things he didn't know.
Warranty & supportowner13 agreedsource β
Generator recharged it from 15% to full in under an hour while powering the house.
Chargingmeasuredowner4 agreedsource β
Got an F3800 Plus with an expansion battery and home backup kit for $4,200.
Price & valuemeasuredowner3 agreedsource β
Claims are weighted by how specific they are, whether the commenter owns the unit, and how many readers agreed. Comments that mention a product under a rival's review count for more, because the commenter had no reason to be there. This is what buyers report, not our test results β for measurements we ran ourselves, see the methodology.
Who Should Buy Which
Buy the DELTA Pro Ultra if youβ¦
- βYour outages run for days, and you want the most left in the tank on day three.
- βYou're protecting a desktop, a server or a Starlink dish, and want the no-break rating.
- βYou're wiring a large roof array and want room for up to 5,600W of panels.
Buy the SOLIX F3800 PLUS if youβ¦
- β$2,600 is your ceiling, and one tank gets you through a typical outage.
- βYou want more outlets at the unit: six AC sockets and a 12V car port.
- βIt has to move now and then, and the lighter build on wheels helps.
If neither fits
If what you actually need is a weekend of camping or a tailgate, both are far more weight and money than the job asks. A portable unit you can lift into a car is the better buy.
The Bottom Line
The DELTA Pro Ultra costs more on the receipt and less per kWh over a full rated life. It holds more, runs more and leaves far more in the tank after a long outage.
The F3800 Plus is the right buy if $2,600 is your ceiling and your outages usually end overnight. For outages that run for days, the Ultra's extra capacity is what the gap pays for.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the EcoFlow DELTA Pro Ultra worth $1,599 more than the Anker SOLIX F3800 Plus?
By lifetime cost, yes. The DELTA Pro Ultra works out to $0.20 per lifetime kWh against $0.23 for the F3800 Plus, because its 6,144Wh battery and 3,500-cycle rating store more energy over the years. The warranty is 5 years on both. If only the price today matters, the F3800 Plus is $1,599 cheaper.
Which one is quieter?
EcoFlow lists 30dB for the DELTA Pro Ultra, a best-case figure. Anker does not publish a noise figure for the F3800 Plus. One reviewer who used both found the Ultra quieter and described the F3800 Plus as still surprisingly quiet. Another says its fans get loud mainly above about 4,000W or during full-speed charging.
Can either one run a whole home during an outage?
Both can cover essential circuits. The DELTA Pro Ultra's 7,200W continuous output gives more headroom for heavy loads running together, and EcoFlow classifies its switchover as no-break. The F3800 Plus runs 6,000W and is rated no worse than 20ms, which covers most household loads with less margin.
Does either unit have known reliability issues?
Owner reports on both are limited. On the F3800 Plus, one owner reported a noise problem and unanswered support emails, while another in the same thread described fast replacement service, possibly on the older F3800. Early reviews also flagged standby drain, which Anker says a firmware update cut by about half. EcoFlow support reports are split between painless replacements and long waits.
Related comparisons
Where to buy
EcoFlow DELTA Pro UltraPick
$4,199.00
$4,199.00 Β· direct from EcoFlow
Last checked 28 days ago. Prices move β check before you buy.
Anker SOLIX F3800 PLUS
$2,599.99
$2,599.99 Β· direct from Anker
Last checked 28 days ago. Prices move β check before you buy.
Prices may vary by retailer and are subject to change.