Head-to-head test
EcoFlow DELTA 3 1000 Air vs Goal Zero Yeti 700
$309 buys 960Wh at 11 cents per lifetime kWh from the DELTA 3 1000 Air; $699.95 buys 677Wh at 26 cents from the Yeti 700 — and the cheaper unit's one real catch is an 18W USB-C port next to the Yeti's 100W.
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
EcoFlow
DELTA 3 1000 Air
3,014Power Score · Appliance Class
$309.00 list · direct from EcoFlow
Goal Zero
Yeti 700
1,982Power Score · Device Hub
$699.95 list · direct from Goal Zero
Spec deltas
The DELTA 3 1000 Air holds 960Wh for $309; the Yeti 700 holds 677Wh for $699.95 — 283 fewer watt-hours for $390.95 more, and the gap barely narrows over each unit's life: 11 cents per lifetime kilowatt-hour for the EcoFlow, 26 cents for the Yeti.
Both are modest, low-draw units by design. The DELTA 3 1000 Air was built as a power-protection box for a desk — a 10ms UPS switchover keeps a computer, monitor, and router alive through a blipA2 — and its 500W continuous output means it was never meant to run a space heater or hair dryerA3. The Yeti's 600W ceiling is only marginally higher, and neither unit clears the engine's Weekend Camping, 8-Hour Blackout, Remote Workday, or Van Life Daily math.
Where they do split is smaller loads: CPAP Overnight and Tailgate Party. The DELTA wins both, on top of costing less per watt-hour and per lifetime kWh. Its honest catch is a USB-C port capped at 18W against the Yeti's 100W — real, and worth knowing before you assume the cheaper box does everything the pricier one does.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
continuous output
The Yeti isn't just short on surge ratio; the Wh math behind it is thinner too, so the same 670Wh load costs the Yeti 116% of usable capacity against the DELTA's 82%. That's not a close call — it's a scenario one unit passes and the other doesn't.
DELTA 3 1000 Air surges to 1000W against a 500W continuous rating — a 2x marginYeti 700 surges to the same 1000W against a 600W continuous rating — a 1.67x marginTailgate Party needs 670Wh: DELTA covers it at 82% of usable capacity, Yeti needs 116% and can't
Why it mattersAnyone running a compressor cooler or similar surge load at a tailgate or campsite should size to the DELTA, not the lighter-looking Yeti spec sheet.
cost / lifetime kWh
That's not the Yeti closing the price gap; it's the Yeti's longer warranty doing arithmetic the DELTA's shorter one can't match, backed by a real 1,000-cycle life advantage (4,000 rated cycles against 3,000).
DELTA 3 1000 Air costs $0.11 per lifetime kWh against the Yeti's $0.26DELTA costs $155 per warranted year against the Yeti's $140DELTA carries a 2-year warranty against the Yeti's 5-year warranty
Why it mattersBuyers weighing long-term coverage over day-one price should give the Yeti's warranty math real weight — it's the one place the more expensive unit is the better value, not just the safer one.
That gap matters less if you're plugging a desktop through the DELTA's AC outlet the way it's designed to be used, and matters a lot if your actual plan is charging a laptop over USB-C away from a wall.
DELTA 3 1000 Air's USB-C port maxes at 18WYeti 700's USB-C port handles up to 100WDELTA was built as a UPS device to keep a computer, monitor, and router running through an outage, not to charge devices over USB-CA2
Why it mattersAnyone whose primary use is USB-C laptop charging on the go should credit the Yeti's 100W port as real functional value, not just a spec-sheet number.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: Sticker and per-kWh cost both favor the DELTA, but warranty-year cost flips toward the Yeti
cost / lifetime kWh
Run each unit against its own use pattern and the DELTA still leads: 8.2 years to burn through its rated cycles on daily use against the Yeti's 11, but at a fraction of the entry cost, and a weekend user gets to 28.8 years on the DELTA against 38.5 on the Yeti — both effectively outlive the person buying them, which is the point of LiFePO4 chemistry in either box.
The one number that doesn't favor the DELTA is cost per warranted year — $155 against the Yeti's $140 — because Goal Zero backs the Yeti for five years and EcoFlow backs this one for two. That's a real, if narrow, argument for the Yeti if warranty length is what you're actually buying.
Your Life, Your Pick
Selected because: CPAP Overnight and Tailgate Party are the only scenarios that split this pair
Weekend Camping, the 8-Hour Blackout, Remote Workday, and Van Life Daily rule out both units outright — this pairing is built for small, short jobs, not multi-day off-grid power, and neither spec sheet pretends otherwise.
CPAP Overnight is where the DELTA's efficiency shows up cleanest: it clears the load using less of its usable capacity than the Yeti needs for the same night, and it repeats the pattern on Tailgate Party, the one scenario the Yeti fails outright.
What the Specs Don't Tell You
Selected because: USB-C wattage, surge ratio, cycle life, and undisclosed Yeti noise all fire here
rated cycles
The USB-C gap is the DELTA's real weakness next to the Yeti's, not a marketing footnote — 18W against 100W is the difference between trickle-charging a phone and fast-charging a laptop, and it's worth knowing going in rather than discovering it the first time a laptop charger won't cooperate.
Everything else here tilts toward the DELTA: a wider surge margin relative to its own output, a disclosed 39dB noise rating where the Yeti publishes none, and a lower price that its 1,000-cycle deficit against the Yeti doesn't come close to erasing.
Brand Trust
Selected because: Cross-brand pair — EcoFlow's ecosystem scale vs. Goal Zero's heritage and pricing
EcoFlow runs the largest lineup and community in the category by a wide margin, with the fastest charging tech it sells and a support experience that's polarized — many report smooth prepaid-label replacements, others long waits or refurbished swaps. The October 2025 DELTA Max 2000 recall and a shelved app-subscription trial are both real marks worth knowing, even though neither touches this specific unit.
Goal Zero built this market and still leans on that heritage, with a US-based team and genuinely rugged, weather-resistant hardware. It's also the most expensive brand per watt-hour in the category, and 2025-2026 support reports describe longer waits than its premium reputation implies — a fact that lands directly on this page's price gap.
Strengths & trade-offs
EcoFlow DELTA 3 1000 Air
Strengths
- +Costs $391 less
- +Larger battery capacity
- +Faster solar charging
Trade-offs
- –Shorter-lived battery — rated for 3,000 charge cycles vs the Yeti 700's 4,000, so it wears out sooner.
Goal Zero Yeti 700
Strengths
- +Lighter by 2.7 lb
- +Higher AC output
- +Longer warranty
- +Rated for 4,000 charge cycles — much longer battery lifespan
Trade-offs
- –Substantially more expensive (+$391) than the DELTA 3 1000 Air.
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
Neither unit
Neither unit is sized for a full weekend off-grid — both fall well short of the load, so don't stretch either past what its own scenario math supports.
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
Neither unit
Neither unit can fully handle this scenario (needs 1,645Wh). You'd need a higher-capacity station or to cut back on usage.
Battery budget usedlower = more headroom
LOAD Fridge 150W×8h · Router + Modem 20W×8h · LED Lights (4 bulbs) 40W×6h · Phone Charger 15W×3h
SCN-03 · 8 hours · needs 320Wh
CPAP Overnight
Sleep therapy without interruption — the #1 medical use case
DELTA 3 1000 Air
Both clear this one, but the DELTA does it using less of its usable capacity — the cheaper unit is also the more efficient one here.
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
Neither unit
Neither unit can fully handle this scenario (needs 910Wh). You'd need a higher-capacity station or to cut back on usage.
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 3 1000 Air
The DELTA covers this load with room to spare; the Yeti's thinner surge margin and smaller battery put it over the line — one of the only hard pass/fail splits on this page.
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 unit can fully handle this scenario (needs 4,685Wh). You'd need a higher-capacity station or to cut back on usage.
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 six 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 3 1000 Air runs 4h vs 2.8h.
$309 list · direct from EcoFlow
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 0–54.4hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–10.9hHigh-Draw Appliances
These reveal the real limits¹ 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
July 14, 2026
Verdict: the DELTA 3 1000 Air
The DELTA 3 1000 Air undercuts the Yeti 700 by $390.95 for 283 more watt-hours, and wins the two scenarios that actually separate them — CPAP Overnight and Tailgate Party. It also carries a wider surge margin and a disclosed 39dB noise rating where Goal Zero publishes nothing. Its real weaknesses are a 500W continuous ceiling that rules out heavier draws, an 18W USB-C port that won't fast-charge a laptop, 1,000 fewer rated cycles, and a shorter 2-year warranty against the Yeti's 5. For a budget desk UPS or light camping charger, take the DELTA. If USB-C laptop charging or a longer warranty clock matters more than price, the Yeti earns its premium in exactly those two places and nowhere else.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 14, 2026. The links below open EcoFlow's and Goal Zero's current prices.
$309.00 list · direct from EcoFlow
or check the Yeti 700 price$699.95 list
Written by Ian Schneider, Solar & Off-Grid Tester · Station Arena Test Desk · Updated July 14, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Full specifications
ᵈ Derived: price ÷ rated capacity. See the data behind our comparisons →
Comparison ToolAdd more power stations, side by sideOpen Tool →How these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it — no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews — see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity × 0.85 inverter efficiency) ÷ device wattage. Solar recharge estimates assume panels deliver 70% of rated output. Cold weather, battery age, and stacked loads reduce real-world results.
Power Score
Computed from 14 published spec dimensions, weighted per use-case bench. Higher is better; a unit must meet a bench's minimum threshold to be rated.
See the full weight table and data sourcing on our methodology page →Class ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews — no buyer opinions feed it. We score every station on size-independent quality (value, output, portability, endurance, ports, warranty, and more), then percentile-rank it against the other units in its capacity class, so a class-leading compact unit and a class-leading whole-home unit can both earn 5★. Here, DELTA 3 1000 Air rates 5.0/5 (99th percentile of 19 Compact-class units), and Yeti 700 rates 3.6/5 (17th percentile of 19 Compact-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.
18W USB-C: Fine for a Phone, Not a Laptop
The DELTA 3 1000 Air's USB-C port tops out at 18W. It'll charge a phone overnight without issue; it won't fast-charge a modern laptop the way the Yeti's 100W port can.
Surge Margin: 2x vs. 1.67x
Both units cap at the same 1000W surge ceiling, but the DELTA gets there from a lower continuous rating — proportionally more headroom, and it's the unit that actually clears the Tailgate Party scenario.
1,000-Cycle Gap, Priced Into the Warranty
4,000 rated cycles for the Yeti against 3,000 for the DELTA. It's real, and it's most of why the Yeti backs its unit for five years against the DELTA's two.
One Spec Goal Zero Won't Publish
The DELTA lists 39dB. The Yeti 700's noise level isn't disclosed anywhere. Not proof of a problem, but it's an unknown you're buying into next to a unit that told you the number.
Full record above — the Test Desk pick is the DELTA 3 1000 Air.
Check DELTA 3 1000 Air price →or check the Yeti 700 priceOwnership Analysis
What happens after you buy — true cost of ownership, brand trust, and growth potential.
Lifetime value
Service lifeyears at one full cycle per day
Lifetime energy delivered
Cost per delivered kWh
│ warranty ends · Reaching the cycle rating means ~80% capacity remains — degraded, not dead.
Analyst note
The DELTA 3 1000 Air wins on both sticker price and long-term value. At $0.11/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner.
Delivers each lifetime kWh for $0.15 less — check the DELTA 3 1000 Air 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
The largest ecosystem and fastest charging tech in the category, with a community that dwarfs Goal Zero's in size.
Worth knowing
The October 2025 DELTA Max 2000 recall and a shelved app-subscription trial are real marks on the record, even though neither involves this specific unit.
Goal Zero
Ecosystem
Focused — 5-6 active portable power station models across Yeti and Yeti Pro series, 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
Built this market and still trades on genuine outdoor-grade ruggedness with a US-based support team.
Worth knowing
Carries the highest price-per-watt-hour of any brand in this comparison, and recent support reports describe longer waits than the brand's premium reputation implies.
Analyst note
EcoFlow's scale and pricing win the raw numbers on this page; Goal Zero's case rests on warranty length and ruggedness a buyer either needs or doesn't.
Growth path
DELTA 3 1000 Air
FIXED CAPACITYFixed at 960Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 500W of solar. Suitable for a 1-2 panel setup.
Adequate ports for most setups, but heavy users may want a power strip.
Yeti 700
FIXED CAPACITYFixed at 677Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 200W of solar. Limited to a single portable panel.
Adequate ports for most setups, but heavy users may want a power strip.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Neither expands, and that's no knock on either — each is a complete unit at a fixed size. Buy the capacity that covers your needs now (the DELTA 3 1000 Air gives you the larger ceiling); you can't add to either later.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3 1000 Air
Reviewers describe the DELTA 3 1000 Air as a focused, minimalist design — fewer ports and features than EcoFlow's larger units, but a genuine 960Wh LiFePO4 battery packed into 22 lbsA1. Its standout use case is protection, not portability: the sub-10ms UPS switchover is specifically built to keep a computer, monitor, and router running through a power blipA2, which lines up with its low 500W continuous ceiling — this isn't a unit meant to run a space heater or hair dryer, and reviewers are consistent on that limitA3. Worth flagging plainly: EcoFlow no longer sells this exact model, with the standard DELTA 3 as its successor and a considerably higher continuous outputA4 — if you're comparing current-catalog options rather than working from a specific listing, confirm what you're actually being offered.
“A 960Wh LiFePO4 unit with a 500W inverter (800W X-Boost) weighing only 22 lbs — a focused, minimalist design with fewer ports and features.”
Sources
thesolarlab.com · batteryskills.com · backuppowerhub.com · matanich.com
Goal Zero Yeti 700
Reviewers consistently describe the Yeti 700 as built for quick trips and simple device charging rather than heavy duty cyclesB3 — a fair description next to a DELTA that's tuned even further toward a stationary desk than outdoor movement. The 6th-generation LiFePO4 chemistry earns its 4,000-cycle rating in practice, with owners citing over a decade of expected daily useB1 — the one place the higher price tag buys something concretely better than the DELTA offers. It also carries IPX4 water resistance built for wide temperature swingsB2, ruggedness the indoor-focused DELTA was never designed to need.
“A 6th-generation 677Wh compact power station on upgraded LiFePO4 chemistry rated for 4,000+ cycles — daily use for over 10 years.”
Sources
goalzero.com · amazon.com · campingsolar.us · outdoorgearlab.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
- A focused home-office UPS unit — LFP, 10ms UPS, quiet and light — but low 500W output; now discontinued in favor of the DELTA 3. [DELTA 3 1000 Air · 3 entries]
- Modern LFP (4,000+ cycles), IPX4 ruggedness, and light, simple portability are the highlights; modest power and capacity. [Yeti 700 · 3 entries]
- A1
“A 960Wh LiFePO4 unit with a 500W inverter (800W X-Boost) weighing only 22 lbs — a focused, minimalist design with fewer ports and features.”
thesolarlab.com / batteryskills.com — DELTA 3 1000 Air review · 2026 · [mixed]
- A2
“Built as a power-protection device with a 10ms UPS switchover to keep a computer, monitor, and router running through outages.”
backuppowerhub.com — DELTA 3 1000 Air review · 2026 · [positive]
- A3
“With only 500W continuous output, it won't run a space heater or hair dryer — it's built for low-to-moderate draw devices.”
backuppowerhub.com / matanich.com — DELTA 3 1000 Air review · 2026 · [mixed]
- A4
“EcoFlow no longer sells the DELTA 3 1000 Air; the closest successor is the standard DELTA 3 (1,024Wh LFP, 1,800W output, ~$549).”
backuppowerhub.com — DELTA 3 line · 2026 · [mixed]
- B1
“A 6th-generation 677Wh compact power station on upgraded LiFePO4 chemistry rated for 4,000+ cycles — daily use for over 10 years.”
goalzero.com / amazon.com — Yeti 700 · 2026 · [positive]
- B2
“Carries an IPX4 water-resistance rating and can handle extreme temperatures — a rugged, outdoor-ready design.”
goalzero.com / campingsolar.us — Yeti 700 review · 2026 · [positive]
- B3
“Ideal for quick camping trips and device charging — not the most powerful or capable, but lightweight and simple, appealing to portability-focused users.”
outdoorgearlab.com — Yeti 700 review · 2026 · [mixed]
Research compiled July 14, 2026.
Who Should Buy Which
Buy the DELTA 3 1000 Air if you…
- →Anyone who wants a cheap, light UPS for a desk setup — computer, monitor, router — through short outages.
- →Buyers running a CPAP or small compressor cooler at a tailgate, where the DELTA clears the engine's own scenario math and the Yeti doesn't.
- →Anyone prioritizing cost per watt-hour and per lifetime kWh over warranty length or USB-C charging speed.
Buy the Yeti 700 if you…
- →Buyers who need to fast-charge a laptop over USB-C away from a wall outlet — the Yeti's 100W port does real work the DELTA's 18W can't.
- →Owners who want a longer warranty clock and are willing to pay $390.95 more for three extra years of coverage and 1,000 more rated cycles.
If neither fits
If you need to run a fridge, space heater, or anything drawing more than a few hundred watts continuously, both units are undersized by design — look at a unit with at least 1,500W continuous output instead.
The Bottom Line
The DELTA 3 1000 Air wins on the numbers that matter most for a small desk UPS or light charger: $390.95 cheaper, 283 more watt-hours, a wider surge margin, and the only two scenarios that separate this pair. Its real costs are an 18W USB-C port, a 2-year warranty, and 1,000 fewer rated cycles than the Yeti — genuine trade-offs, not marketing fine print.
Take the DELTA 3 1000 Air unless USB-C laptop charging or a longer warranty window is specifically what you're paying for — those are the only two places the Yeti's $390.95 premium buys something the cheaper box doesn't.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the EcoFlow DELTA 3 1000 Air still available new?
EcoFlow has discontinued this specific model in favor of the standard DELTA 3, which offers considerably higher continuous output. If you're shopping current listings rather than a specific unit already in stock, confirm which DELTA 3 variant you're actually being quoted before comparing it to the Yeti 700.
Can the DELTA 3 1000 Air run a fridge or space heater?
No — its 500W continuous rating is built for light loads like a computer, monitor, and router, not high-draw appliances. The Yeti 700's 600W ceiling is only modestly higher and doesn't change that answer for either unit.
Why is the Yeti 700 more expensive per watt-hour than the DELTA 3 1000 Air?
At $699.95 for 677Wh, the Yeti runs $1.03 per watt-hour against the DELTA's 32 cents — more than 3x. Goal Zero's brand sits at the premium end of the category, and here that premium buys a longer warranty and faster USB-C charging, not more capacity or output.
Which one charges a laptop faster over USB-C?
The Yeti 700, by a wide margin — its USB-C port handles up to 100W against the DELTA 3 1000 Air's 18W. If USB-C laptop charging away from a wall outlet is a primary use case, that gap is worth the Yeti's higher price.
Is the DELTA 3 1000 Air loud while charging?
EcoFlow discloses a 39dB noise rating for it; Goal Zero doesn't publish one for the Yeti 700 at all. A disclosed number isn't proof of quiet operation, but it's the only spec-sheet answer available between the two.
Where to buy
EcoFlow DELTA 3 1000 AirPick
$309.00
$309.00 list · direct from EcoFlow
Goal Zero Yeti 700
$699.95
$699.95 list · direct from Goal Zero
Prices may vary by retailer and are subject to change.