Head-to-head test
EcoFlow DELTA 3000 Gen4 vs Goal Zero Yeti PRO 4000Same Inverter at Half the Weight. How Long Is Your Outage?
The same 3,600 W inverter as the Yeti in a box half its weight, sealed at 3,072 Wh. I'd buy the EcoFlow for outages that end by morning, unless yours run into a second night or you know you'll add batteries.
Black Friday · 23 days out
Price to beat:Yeti PRO 4000 $4,000
We have never seen it discounted, so any real cut would be a first.
Full profiles: EcoFlow DELTA 3000 Gen4 → · Goal Zero Yeti PRO 4000 →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Spec deltas
Gunner’s take
Whole-Home Backup Tester
On the inverter this pair is a dead heat, and on the scale it isn't close.
Both run 3,600 W and surge to 7,200 WA2. EcoFlow's DELTA 4 (3000) does it at 57.3 lbA7, and Goal Zero's Yeti PRO 4000 does it at 115.7 lb. That's twice the weight for the same inverter.
What the Yeti's extra 58.4 lb buys is battery, sun and room to grow.
It holds 3,994 Wh against 3,072 Wh, takes 3,000 W of solar against 1,000 W, and accepts Goal Zero's expansion batteries. The DELTA 4 (3000) has no battery port at allA6. The battery you buy is the battery you keep.
At the register, the EcoFlow costs a little over half as much per watt-hour.
It's $1,699 against $4,000 for the Yeti. The catch is the calendar: EcoFlow ships the DELTA 4 (3000) in early DecemberA10, and the Yeti is on sale now.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
solar input
An outage that runs from dinner to breakfast is the DELTA 4 (3000)'s job, and it ends that night with 966 Wh to spare. One that runs into a second evening needs a refill before dark, from a generator through the AC inlet at up to 1,800 WA4 or from the sun through its single 1,000 W inputA5. The Yeti rides into the second night without asking. The EcoFlow can't take an extra battery to catch upA6, so more capacity later means a second unit.
8-Hour Blackout: 1,645 Wh neededDELTA 4 (3000): 2,611 Wh usable, 966 Wh left after the nightYeti PRO 4000: 3,395 Wh usable, 1,750 Wh left after the nightDELTA 4 (3000): no battery portA6; one 1,000 W solar inputA5; up to 1,800 W from the wallA4
Why it mattersIf your outages are measured in hours, the EcoFlow. If they're measured in days with no way to recharge, the Yeti.
rated cycles
Spread each price over that rated lifetime and the DELTA 4 (3000) comes to $0.09 a kWh against $0.25 for the Yeti, about a third as much. That only counts for a box that works for a living, cycling daily on solar or shaving a time-of-use bill. A battery that waits at full charge for two storms a year never gets near either rating.
DELTA 4 (3000): 3,072 Wh, rated for 6,000 cyclesA9Yeti PRO 4000: 3,994 Wh, rated for 4,000 cycles$1,699 against $4,000
Why it mattersIf it will cycle every day, the EcoFlow is the cheaper energy by a wide margin. If it sits on standby, decide on the blackout instead.
weight
Feeding 3,000 W takes a roof's worth of panels, wired once and left alone, and a box that never moves pays for its 115.7 lb once. The DELTA 4 (3000) is the one that goes to the cabin. EcoFlow's own kit sends it there with two 160 W folding panelsA10, about a third of what its input accepts, so the 1,000 W ceiling isn't what holds a folding setup back.
DELTA 4 (3000): 57.3 lb, a handle at each endA7Yeti PRO 4000: 115.7 lb, a two-person unit to moveB1Yeti PRO 4000: 3,000 W solar input against 1,000 W; EcoFlow's own kit pairs the DELTA 4 (3000) with two 160 W folding panelsA10
Why it mattersIf you're wiring a fixed array past 1,000 W, the Yeti. If your panels fold into a trunk, the EcoFlow.
The specific dimensions that decide these two units — everything else is a tie.
Your Life, Your Pick
Selected because: Both finish the 1,645 Wh blackout, with 966 Wh left against 1,750 Wh.
The blackout is the one scenario the Yeti wins outright. Both finish the 1,645 Wh night. The Yeti has a full second night left, 1,750 Wh, and the DELTA 4 (3000) has 966 Wh. EcoFlow says it runs a refrigerator for up to 58 hoursA12, but that's EcoFlow's claim and not our measurement, so I'd plan a two-day outage on the 966 Wh.
Everything else goes to the EcoFlow or splits. A CPAP night uses 12% of the DELTA 4 (3000)'s usable battery and a remote workday 35%, so both finish with plenty left. Camping and the tailgate go to the EcoFlow because nobody hauls 115.7 lb to a campsite. Van Life Daily needs 4,685 Wh and beats both, and only the Yeti can add a battery to close the gap.
Growth Path
Selected because: The DELTA 4 (3000) stops at 3,072 Wh. The Yeti starts at 3,994 Wh and takes expansion batteries.
solar input
This is the EcoFlow's honest weakness: 3,072 Wh is the ceiling. The DELTA 4 (3000) has no battery portA6. Outgrow it and your upgrade is a second unit. The Yeti starts 922 Wh higher and takes Goal Zero's expansion batteries, though our record doesn't carry how far it grows.
If you like the EcoFlow but want it to grow, look one model up. The bigger DELTA 4 is the one with a battery portA6. Against the Yeti, the DELTA 4 (3000) suits the buyer who already knows 3,072 Wh covers the night.
Portability & Form Factor
Selected because: 57.3 lb against 115.7 lb, and both run the same 3,600 W.
weight
I'd carry the DELTA 4 (3000) down the basement stairs by myself. It's 57.3 lb with a handle at each end, and EcoFlow sells a folding cart separatelyA7. The Yeti is 115.7 lb, a two-person move by a reviewer's accountB1.
The extra weight buys no extra output. Both inverters are rated 3,600 W. The Yeti's 58.4 lb goes into 922 Wh more battery and a solar input three times the size. Wired in beside the panel for good, that's a one-day problem. Taken to the cabin, it's every trip.
Lifetime Value
Selected because: 6,000 rated cycles against 4,000, so the smaller battery delivers more energy over its life.
cost / lifetime kWh
Over a whole battery life, the smaller box delivers more. EcoFlow rates the DELTA 4 (3000) for 6,000 cyclesA9 and Goal Zero rates the Yeti for 4,000. That makes the EcoFlow $0.09 a lifetime kWh against $0.25, about a third of the cost.
It only pays if you cycle it. Run either one through a full cycle every day and the Yeti reaches its rating in 11 years, the EcoFlow in 16.4. A box that waits at full charge for two outages a year never gets near either, so a standby buyer should decide on the blackout, not on this table.
Every port, labelled
What plugs in where, and how much it takes
EcoFlow DELTA 3000 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
- 1Solar/DC in · 1,000 WIn11 to 60 V, up to 20 A, 1,000 W.
- 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.
No battery port: the 3000 doesn’t take extra batteries.
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.
Goal Zero Yeti PRO 4000
Front panel
- 12× 6 mm 12 V out · 10 AOutTwo 6 mm 12 V outputs, 135 W each (13.5 V, 10 A continuous) by Goal Zero’s specs. All the 12 V outputs share 375 W.
- 212 V car socket · 12 AOutA 12 V car socket, 162 W (13.5 V, 12 A continuous) by Goal Zero’s specs.
- 34× 20 A outletsOutFour T-slot 120 V outlets, 20 A and up to 2,400 W each by Goal Zero’s specs. All the AC shares 3,600 W continuous and 7,200 W peak, as printed on the panel.
- 43× USB-A · 18 WOutThree USB-A ports printed 18W QC, 54 W together by Goal Zero’s specs.
- 5USB-C · 100 WOutOne USB-C port printed 100W PD (5 to 20 V, up to 5 A).
- 62× USB-C · 30 WOutTwo USB-C ports printed 30W PD. The three USB-C ports share 160 W by Goal Zero’s specs.
The inputs, the RV outlet and the battery port are on the back, mapped below.
Photo: Goal Zero · Product image, Goal Zero store · numbers and labels are ours. Ratings printed on Goal Zero’s panel and in the tech specs on Goal Zero’s US store page.
Back panel
- 1Solar in (HPP) · 3,000 WInGoal Zero’s high-voltage input: up to 3,000 W, 13.3 to 150 V, up to 30 A by its specs. The panel prints Never exceed 145V.
- 28 mm DC in · 275 WInAn 8 mm low-voltage input: up to 275 W, 12.3 to 28 V, up to 10 A by Goal Zero’s specs. The panel prints Never exceed 30V.
- 3Input limit switchInA switch printed INPUT LIMIT, LOW and HIGH.
- 4AC in · 1,800 WInThe AC charging inlet: up to 1,800 W (90 to 144 V, up to 15 A) by Goal Zero’s specs.
- 512 V HPP out · 30 AOutA 12 V high-power port printed 12V DC OUT: 405 W (13.5 V, 30 A continuous) by Goal Zero’s specs.
- 6TT-30R RV outlet · 30 AOutA TT-30R RV outlet, 120 V, 30 A, 3,600 W by Goal Zero’s specs. A camper’s shore-power cord plugs straight in.
- 7Power+ · 3,600 WIn · OutGoal Zero’s Power+ port: 3,600 W out at 120 V, 30 A, or pass-through; it also charges the unit at up to 1,800 W.
- 8Battery portIn · OutPrinted EXPANSION: for Goal Zero’s Tank PRO 4000 batteries (100 A, 100 V max). Goal Zero says up to four tanks, 20 kWh in all.
- 9AC breakersOutTwo breakers printed AC OUT BREAKERS.
Photo: Goal Zero · Product image, Goal Zero store · numbers and labels are ours. Port names printed on Goal Zero’s panel; ratings from the tech specs on Goal Zero’s US store page and the panel’s printing.
Strengths & trade-offs
EcoFlow DELTA 3000 Gen4
Strengths
- +Costs $2,301 less
- +Lighter by 58.4 lb
- +Rated for 6,000 charge cycles — much longer battery lifespan
Trade-offs
- –Sealed capacity — the Yeti PRO 4000 can add batteries to grow past 3,072Wh; this one can't.
Goal Zero Yeti PRO 4000
Strengths
- +Larger battery capacity
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$2,301) than the DELTA 3000 Gen4.
- –Significantly heavier (+58.4 lbs), making it harder to move.
- –Very heavy unit that may be difficult for one person to lift.
- –Shorter-lived battery — rated for 4,000 charge cycles vs the DELTA 3000 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 3000 Gen4
Both cover the 2,100 Wh weekend. The DELTA 4 (3000) takes it because it's the 57.3 lb one.
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
Yeti PRO 4000
Both finish the 1,645 Wh night. The Yeti has 1,750 Wh left, enough for another night like it. The DELTA 4 (3000) has 966 Wh, a bit more than half of one.
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 Yeti PRO 4000 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
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 3000 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 3000 Gen4
The Yeti PRO 4000 at 115.7 lbs is not a take-along — it rolls off a truck bed if it travels at all, so this scenario belongs to the DELTA 3000 Gen4 by default — and it earns it, covering the 670Wh with 1,941Wh to spare. Capacity was never the Yeti PRO 4000'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 alone. The Yeti comes up 1,290 Wh short and can add a battery. The DELTA 4 (3000) comes up 2,074 Wh short and can't.
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: Yeti PRO 4000 runs 16.6h vs 12.7h.
$3,999.95 list · direct from Goal Zero
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 0–226.3hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–45.3hHigh-Draw Appliances
These reveal the real limitsscale 0–3.4h¹ 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 3000 Gen4
I'd buy the DELTA 4 (3000) for one-night outages and anything that travels. It matches the Yeti PRO 4000's inverter, 3,600 W with a 7,200 W surgeA2, at 57.3 lb against 115.7 lb, and at $1,699 against $4,000 it costs a little over half as much per watt-hour. Its 6,000-cycle rating against 4,000 also makes it $0.09 per lifetime kWh against $0.25. The Yeti earns its price in three places: it finishes an eight-hour blackout with 1,750 Wh left where the EcoFlow has 966 Wh, it takes expansion batteries where the DELTA 4 (3000) never willA6, and it's on sale now while EcoFlow ships in early DecemberA10. Outages that run two nights, a system you plan to grow or a deadline before December flip the call to the Yeti.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of November 4, 2026. The links below open EcoFlow's and Goal Zero's current prices.
$1,699.00 · direct from EcoFlow
or check the Yeti PRO 4000 price$3,999.95 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): 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 3000 Gen4 rates 4.8/5 (86th percentile of 29 Large-class units), and Yeti PRO 4000 rates 3.5/5 (14th 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.
Same Inverter, Twice the Lift
The DELTA 4 (3000) is 57.3 lb and the Yeti PRO 4000 is 115.7 lb, and both run 3,600 W. One adult takes the EcoFlow to the car. The Yeti needs a second person and a spot where it can stay.
Sealed at 3,072 Wh
The DELTA 4 (3000) has no battery port, so the battery you buy is the battery you keep. The Yeti PRO 4000 starts 922 Wh higher and takes expansion batteries. If you want the EcoFlow and room to grow, the bigger DELTA 4 is the model with a battery port.
UPS Switchover: ≤10ms vs ≤15ms
Both list a UPS mode, at different rated speeds. The DELTA 3000 Gen4 is rated ≤10ms — quick enough on paper that desktop PCs and routers should ride through, treating that as the rating it is. The Yeti PRO 4000 is rated ≤15ms — 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 3000 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. Worth saying because the per-dollar framing can suggest otherwise: the DELTA 3000 Gen4 works out at 2.9 years of cover per $1,000 spent against the Yeti PRO 4000's 1.3, but that spread is the price gap, not the terms.
Battery Lifespan in Real Years
The DELTA 3000 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 3,072Wh on the DELTA 3000 Gen4 and 3,994Wh on the Yeti PRO 4000, so count lifetime energy — roughly 18,432 kWh against 15,976 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.
Yeti PRO 4000: Noise Level Not Disclosed
The DELTA 3000 Gen4 publishes its noise level (40dB); the Yeti PRO 4000 doesn't publish one. That isn't evidence the Yeti PRO 4000 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 3000 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 Yeti PRO 4000 before deciding.
Full record above — the Test Desk pick is the DELTA 3000 Gen4.
Check DELTA 3000 Gen4 price →or check the Yeti PRO 4000 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 3000 Gen4 wins on both sticker price and long-term value. At $0.09/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner.
Delivers each lifetime kWh for $0.16 less — check the DELTA 3000 Gen4 price →
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.
Goal Zero
Ecosystem
Focused — a compact current line (6th-gen Yeti and Yeti Pro series), the previous-gen X series now out of stock across every model on Goal Zero's own store (checked 2026-09-13: 200X, 500X, 1000X, 1500X, 3000X, 6000X, some listed only as open-box), so buying one new means finding retailer stock, Sherpa power banks for the under-100Wh tier, plus Alta coolers, Nomad/Ranger solar panels, and vehicle integration kits
Support
US-based company (Salt Lake City, owned by NRG Energy). Historically considered premium support, but 2025-2026 reports describe long wait times, unresponsive email communication, and tickets going unaddressed for weeks. The "premium support justifies premium pricing" argument is weakening.
Community
Small but loyal — strong following in overlanding and preparedness communities. Official community forums were recently shuttered, frustrating long-time users.
App experience
Rated 4.4/5 iOS (~1,200 ratings) but recent reviews skew negative — recurring connectivity issues, crashes, and stability problems.
Unique strength
Pioneer of the portable power market — strongest brand heritage. US-based company with ruggedized, weather-resistant designs (IP ratings vary by model). Integrated "Yeti-Ready" ecosystem with coolers, lights, and vehicle kits.
Worth knowing
Typically the priciest brand per watt-hour — though individual pairings vary, and on some pages the Yeti is the cheaper energy. Support quality has declined from its "premium" standard. Perceived as competitively stagnant vs. faster-innovating Chinese competitors. Reliability reports on newer models are concerning.
Analyst note
EcoFlow and Goal Zero are close competitors. Both have established support channels and growing ecosystems. Compare their specific warranty terms and community size for your peace of mind.
Growth path
DELTA 3000 Gen4
FIXED CAPACITYFixed at 3,072Wh — a sealed, complete system rather than a starting point. There's no expansion port, so that figure is the ceiling: check it against your longest unplugged stretch before you buy.
Accepts up to 1,000W of solar. Enough for a serious multi-panel array.
Adequate ports for most setups, but heavy users may want a power strip.
Yeti PRO 4000
EXPANDABLESupports Goal Zero expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 3,994Wh.
Accepts up to 3,000W of solar. Enough for a serious multi-panel array.
Generous port selection supports complex multi-device setups.
Expansion batteries are Goal Zero-specific. You're investing in the Goal Zero ecosystem.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
The DELTA 3000 Gen4 is sealed at 3,072Wh, which is fine if that covers you. The Yeti PRO 4000 starts at 3,994Wh and can grow beyond it with Goal Zero expansion batteries — real headroom the DELTA 3000 Gen4 doesn't have if your needs climb toward partial-home backup.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3000 Gen4
Nobody owns a DELTA 4 (3000) yet. EcoFlow put it on sale in the US on November 4 and ships it in early DecemberA10, so everything on this page comes from EcoFlow's US store page and our own arithmeticA1A4A9.
I'd want to put EcoFlow's fridge claim through a real weekend. EcoFlow says the DELTA 4 (3000) runs a refrigerator for up to 58 hoursA12. Hypothetically, I'd plug in a full kitchen fridge, cut the grid on Friday night and see what the screen says on Sunday morning. That's the test that tells you whether the Yeti's second night matters in your kitchen.
“Capacity 3,072 Wh, LFP (LiFePO4) cells. EcoFlow sells it as the DELTA 3000 Gen4; buyers and the press call the pair the DELTA 4.”
Sources
us.ecoflow.co · jp.ecoflow.co
Goal Zero Yeti PRO 4000
The Yeti's field record is thin, and it splits. Reviewers call the build one of the most durable they've seen and like the app and the US-based supportB1. Goal Zero and one reviewer put a full solar charge on the 3,000 W input at under two hoursB2.
The complaints on file are about 12 V errors. One set of owner reviews describes a unit returned or replaced and a second with a 12 V error that stopped solar chargingB3. That's one entry, not a pattern I'd call settled.
“Weighs about 115.7 lbs — a two-person unit to move — with one of the most durable builds reviewers have seen, backed by American-based support and a great app.”
Sources
bestgeneratorsolar.com · thesolarlab.com · goalzero.com · business.walmart.co · techradar.com · cleantechnica.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 3000 Gen4 · 12 entries]
- Strong solar input, a great app, American-based support, and a durable build are the praise; heavy weight and some owner reliability reports (12V errors) are the caveats. [Yeti PRO 4000 · 3 entries]
- A1
“Capacity 3,072 Wh, LFP (LiFePO4) cells. EcoFlow sells it as the DELTA 3000 Gen4; buyers and the press call the pair the DELTA 4.”
EcoFlow US store, us.ecoflow.com/products/delta-3000-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-3000-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-3000-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A4
“AC input 100–120 V, 15 A, 50/60 Hz; X-Stream charging up to 1,800 W from a US wall outlet. Our arithmetic: 1,800 W at 120 V is 15 A, the full rating of an ordinary 15 A circuit, so on a shared circuit you would set the charge rate lower in the EcoFlow app.”
EcoFlow US store, us.ecoflow.com/products/delta-3000-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A5
“Solar: one input, 11–60 V DC at up to 20 A, 1,000 W (XT60i; an XT60i-to-LP60 cable is 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-3000-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A6
“No extra-battery port. EcoFlow lists expansion only for the DELTA 3800 Gen4 (two extra batteries through its expansion adapter); the 3000 is sealed at 3,072 Wh.”
EcoFlow US store, us.ecoflow.com/products/delta-3000-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A7
“Weight 57.3 lb (26 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 kWh and 3,600 W).”
EcoFlow US store, us.ecoflow.com/products/delta-3000-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-3000-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 $1,699; EcoFlow says it ships in early December. Kit with two 160 W solar panels $2,299. EcoFlow also sells it in Japan, where it went on sale October 30 at ¥179,900.”
EcoFlow US store, us.ecoflow.com/products/delta-3000-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A12
“Powers a refrigerator for up to 58 hours, which EcoFlow says is 17 hours (41.5%) longer than the industry average for 3 kWh portable power stations. Both figures are EcoFlow's own claims, not our measurement.”
EcoFlow US store, us.ecoflow.com/products/delta-3000-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [positive]
- B1
“Weighs about 115.7 lbs — a two-person unit to move — with one of the most durable builds reviewers have seen, backed by American-based support and a great app.”
bestgeneratorsolar.com / thesolarlab.com — Yeti PRO 4000 review · 2026 · [mixed]
- B2
“3,000W solar input recharges 0-100% in under 2 hours off-grid, with impressive surge and idle efficiency; fully expandable.”
goalzero.com / thesolarlab.com — Yeti PRO 4000 review · 2026 · [positive]
- B3
“Owner reliability is mixed — some report 12V errors, including a first unit returned or replaced and a second that had a 12V error and would not charge from solar.”
business.walmart.com reviews / oliver owner forums — Yeti PRO 4000 · 2026 · [negative]
Research compiled November 4, 2026.
Who Should Buy Which
Buy the DELTA 3000 Gen4 if you…
- →Your outages end by breakfast. The DELTA 4 (3000) finishes the 1,645 Wh night with 966 Wh left.
- →It goes in the car. 57.3 lb against 115.7 lb, for camping, tailgates and the cabin.
- →It will cycle every day. 6,000 rated cycles against 4,000, on solar or a time-of-use bill.
- →A desktop PC sits on it. It's rated to switch over in no worse than 10 ms against 15 ms.
Buy the Yeti PRO 4000 if you…
- →Your outages run into a second night. The Yeti finishes the 1,645 Wh blackout with 1,750 Wh left.
- →You'll add batteries later. The DELTA 4 (3000) never takes oneA6.
- →You're wiring a fixed array. 3,000 W of solar input against 1,000 W.
- →You need it before December. EcoFlow ships the DELTA 4 (3000) in early DecemberA10, and the Yeti is on sale now.
- →You run 12 V gear. Only the Yeti has a car socket, the round one a 12 V cooler or a tire inflator plugs intoA3.
If neither fits
If the load you're worried about is a 240 V well pump or an electric dryer, neither has a 240 V outlet. Look at a unit or home battery that puts out 240 V.
The Bottom Line
For outages that end by morning and a box that travels, I'd buy the DELTA 4 (3000). It matches the Yeti's inverter at half the weight and costs a little over half as much per watt-hour.
If your outages run into a second night, or you know you'll add batteries, buy the Yeti PRO 4000. It's the one that keeps going and keeps growing, 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 (3000) in the US, and when does it ship?
EcoFlow lists it at $1,699 on its US store. It went on sale on November 4, 2026, and EcoFlow says it ships in early December. The Yeti PRO 4000 sells for $4,000.
Can the DELTA 4 (3000) add an extra battery?
No. It has no battery port, so 3,072 Wh is all it will ever hold. The Yeti PRO 4000 accepts Goal Zero expansion batteries, and EcoFlow's bigger DELTA 4 is the model with a battery port.
How long does each one last in a power outage?
Through an eight-hour outage that uses 1,645 Wh, the DELTA 4 (3000) finishes with 966 Wh left and the Yeti PRO 4000 with 1,750 Wh. That's more than half a second night for the EcoFlow and a full second night for the Yeti.
Do the DELTA 4 (3000) and the Yeti PRO 4000 have the same power output?
Yes. Both are rated 3,600 W continuous with a 7,200 W surge. Neither has a 240 V outlet.
Which one is easier to move?
The DELTA 4 (3000), at 57.3 lb against 115.7 lb for the Yeti PRO 4000. One adult can carry the EcoFlow. The Yeti is a two-person move.
Where to buy
EcoFlow DELTA 3000 Gen4Pick
$1,699.00
$1,699.00 · direct from EcoFlow
Goal Zero Yeti PRO 4000
$3,999.95
$3,999.95 · direct from Goal Zero
Last checked 31 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.