Head-to-head test
EcoFlow DELTA 3 vs Goal Zero Yeti 1500 (6th Gen)
Real-world runtimes, scenario verdicts, and ownership costs compared — which wins for your use case.
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
EcoFlow
DELTA 3
2,974Power Score · Appliance Class
$599.00 · direct from EcoFlow
Last checked 6 days ago. Prices move — check before you buy.
Goal Zero
Yeti 1500 (6th Gen)
2,822Power Score · Appliance Class
$1,499.95 · direct from Goal Zero
Last checked 6 days ago. Prices move — check before you buy.
Spec deltas
The EcoFlow DELTA 3 and Goal Zero Yeti 1500 (6th Gen) compete for the same spot. Similar LiFePO4 capacity, similar price range, different brands behind them. In this matchup, ecosystem, app quality, and warranty reputation matter as much as raw specs. Neither unit pulls ahead clearly. That means your specific use case decides this one.
The Yeti 1500 (6th Gen) holds 481Wh more than the DELTA 3 — about 9 hours on a fridge against 6 — a real but modest edge that shows up mainly on longer outages. For camping, tailgating, or keeping devices charged, both have the headroom, so price, weight, and longevity lead the decision instead.
Both handle weekend camping, tailgating, and emergency preparedness. Your call is whether saving $901 (DELTA 3) matters more than the Yeti 1500 (6th Gen)'s specific advantages. Most buyers stop at the sticker price and miss this: over a full lifespan the DELTA 3 works out to about $0.19/kWh against the Yeti 1500 (6th Gen)'s $0.25, a gap that compounds in the DELTA 3's favor the more you cycle it. Keep scrolling for the full breakdown. The scenario verdicts below hold a few surprises.
Bench Notes
What each unit does well, where it falls short, and the trade-offs that matter.
EcoFlow DELTA 3
The 1,800W inverter handles most daily devices like laptops, blenders, and TVs, but will struggle with heating elements that require over 1500W. A standout feature is the value proposition: at roughly $0.58 per watt-hour, it's one of the most cost-effective options on the market.
Strengths
- +Costs $901 less
- +Lighter by 25.8 lb
Trade-offs
- –Shorter-lived battery — rated for 3,000 charge cycles vs the Yeti 1500 (6th Gen)'s 4,000, so it wears out sooner.
Goal Zero Yeti 1500 (6th Gen)
The 2,000W inverter handles most daily devices like laptops, blenders, and TVs, but will struggle with heating elements that require over 1500W. Weighing in at 52.8 lbs, this is not a unit you want to carry far. It's best suited as a stationary backup or RV companion.
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
- +Rated for 4,000 charge cycles — much longer battery lifespan
Trade-offs
- –Substantially more expensive (+$901) than the DELTA 3.
- –Significantly heavier (+25.8 lbs), making it harder to move.
Will It Power Your Gear?
Scenario math and per-appliance runtimes, modeled from the spec record.
Scenario verdicts
We ran the math on six real-world scenarios. Here's which unit survives your actual life.
SCN-01 · 2 nights · needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
Neither unit
Neither unit covers this scenario's 2,100Wh: the DELTA 3 comes up 1,230Wh short (about 41% covered), the Yeti 1500 (6th Gen) 821Wh (61%). Treat this as partial cover — enough for the essentials in it, not the whole list.
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 covers this scenario's 1,645Wh: the DELTA 3 comes up 775Wh short (about 53% covered), the Yeti 1500 (6th Gen) 366Wh (78%). Either gets you most of the way, so this is a scenario you plan around rather than one you should rule them out for.
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 cover the night with room to spare and capacity decides nothing. Fan noise would — but Yeti 1500 (6th Gen) 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
Yeti 1500 (6th Gen)
The DELTA 3 comes up just short — it needs 910Wh and has 870Wh usable, a 40Wh gap (its nameplate 1,024Wh actually clears this — the flat 15% conversion allowance is what tips it under). Trim that much — one small appliance's worth across the day — and it finishes. The Yeti 1500 (6th Gen) covers it outright with 369Wh to spare.
Battery budget usedlower = more headroom
LOAD Laptop 60W×8h · External Monitor 30W×8h · Router + Modem 20W×8h · Phone Charger 15W×2h
SCN-05 · 4 hours · needs 670Wh
Tailgate Party
Game day power for the crew
Yeti 1500 (6th Gen)
Both handle game day; the Yeti 1500 (6th Gen) keeps more in reserve (52% used vs 77%). Tailgating is a light load, though, so the number you'll feel is weight: 27 lbs for the DELTA 3 against 52.8 lbs for the Yeti 1500 (6th Gen), from the trunk to the setup spot.
Battery budget usedlower = more headroom
LOAD Blender 400W×0.5h · LED TV (55") 80W×4h · Bluetooth Speaker 15W×4h · Phone Charger (×3) 45W×2h
SCN-06 · 24 hours · needs 4,685Wh
Van Life Daily
A full day of mobile living — the ultimate endurance test
Neither unit
Neither unit covers this scenario's 4,685Wh: the DELTA 3 comes up 3,815Wh short (about 19% covered), the Yeti 1500 (6th Gen) 3,406Wh (27%). This is well outside what either unit is for; the right answer here is a larger station, not a choice between these two.
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 1500 (6th Gen) runs 6.2h vs 4.2h.
$1,499.95 list · direct from Goal Zero
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 0–85.3hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–17.1hHigh-Draw Appliances
These reveal the real limitsscale 0–1.3h¹ 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
July 10, 2026
Verdict: evenly matched
These two units are evenly matched. The DELTA 3 is lighter by 25.8 lbs, while the price difference is only $901. Your choice comes down to brand preference mostly.
Overall score margin: 2,974 vs 2,822 (+5.4%)
Written by Ian Schneider, Solar & Off-Grid Tester · Station Arena Test Desk · Updated July 10, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): Camping.
Full specifications
ᵈ Derived: price ÷ rated capacity. See the data behind our comparisons →
Comparison ToolAdd more power stations, side by sideOpen Tool →How these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it — no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews.
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 rates 4.3/5 (57th percentile of 24 Everyday-class units), and Yeti 1500 (6th Gen) rates 3.4/5 (4th percentile of 24 Everyday-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.
Yeti 1500 (6th Gen): Fixed Capacity
The Yeti 1500 (6th Gen) is sealed at 1,505Wh — a complete unit, and already larger than the DELTA 3's 1,024Wh. By contrast the DELTA 3 can add expansion batteries, but that only pulls ahead if you'd grow past 1,505Wh.
UPS Switchover: ≤10ms vs ≤15ms
Both list a UPS mode, at different rated speeds. The DELTA 3 is rated ≤10ms — quick enough on paper that desktop PCs and routers should ride through, treating that as the rating it is. The Yeti 1500 (6th Gen) 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. Worth saying because the per-dollar framing can suggest otherwise: the DELTA 3 works out at 8.3 years of cover per $1,000 spent against the Yeti 1500 (6th Gen)'s 3.3, but that spread is the price gap, not the terms.
Battery Lifespan in Real Years
The Yeti 1500 (6th Gen) is rated for 4,000 cycles vs 3,000. In real life: at daily use, that's 11 vs 8.2 years. At weekend use (twice a week), it's 38 vs 29 years. One caution reading years across different sizes: a cycle is 1,505Wh on the Yeti 1500 (6th Gen) and 1,024Wh on the DELTA 3, so count lifetime energy — roughly 6,021 kWh against 3,072 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 1500 (6th Gen): Noise Level Not Disclosed
The DELTA 3 publishes its noise level (30dB); the Yeti 1500 (6th Gen) doesn't publish one. That isn't evidence the Yeti 1500 (6th Gen) 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 3's 30dB as the only published number on the table — a spec-sheet figure, not a measurement — and look for hands-on reports of the Yeti 1500 (6th Gen) before deciding.
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 DELTA 3 wins on both sticker price and long-term value. At $0.19/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner.
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 very top of the range, the DELTA Pro Ultra platform stacks batteries and inverters into whole-home backup — a flagship path, not a line-wide feature.
Worth knowing
The Oct 2025 DELTA Max 2000 recall (overheating/fire risk, 6 incidents) is worth noting. Also 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 still widely sold, 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 3
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 1,024Wh.
Accepts up to 500W of solar. Suitable for a 1-2 panel setup.
Generous port selection supports complex multi-device setups.
Expansion batteries are EcoFlow-specific. You're investing in the EcoFlow ecosystem.
Yeti 1500 (6th Gen)
FIXED CAPACITYFixed at 1,505Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 900W of solar. Suitable for a 1-2 panel setup.
Generous port selection supports complex multi-device setups.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Don't read the DELTA 3's expandability as a straight win here: it starts at 1,024Wh, below the Yeti 1500 (6th Gen)'s 1,505Wh, so a first expansion battery largely buys back capacity the Yeti 1500 (6th Gen) already includes. It only pulls ahead if you'd grow past 1,505Wh — short of that, the Yeti 1500 (6th Gen)'s larger fixed capacity is the simpler value.
The Bottom Line
These two LiFePO4 portable power stations are genuinely close. After comparing capacity, output, portability, price, and real-world runtime, neither has a decisive advantage. If budget is the deciding factor, the DELTA 3 saves you $901. If you need the extra 481Wh of capacity, the Yeti 1500 (6th Gen) justifies the spend.
If neither the DELTA 3 nor the Yeti 1500 (6th Gen) feels like the right fit, your power needs probably sit outside what these two target. Use our comparison tool above to explore alternatives that better match your specific wattage and runtime requirements. Prices on portable power stations fluctuate frequently. Both EcoFlow and Goal Zero discount regularly, so check the current price before committing. Prime Day and Black Friday pricing typically drops 20-30%.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the Yeti 1500 (6th Gen) worth $901 more than the DELTA 3?
The short answer: yes, if you'll actually use the extra capability. The Yeti 1500 (6th Gen) costs $901 more, but that premium buys you 481.3Wh more battery capacity (that's 3 extra hours of running a mini-fridge); 200W higher AC output (opening the door to more demanding appliances); a longer-lasting battery rated for 4,000 cycles — that's 11 years at daily use; 400W faster solar charging for quicker off-grid recovery. On a cost-per-watt-hour basis, you're paying $1.00/Wh vs $0.58/Wh. For regular use, we'd pay the premium.
Can I actually carry the Yeti 1500 (6th Gen), or is the DELTA 3 the only portable option?
At 27 lbs, the DELTA 3 is manageable for one person over short distances: parking lot to campsite, trunk to tailgate. The Yeti 1500 (6th Gen) at 52.8 lbs? You'll want a buddy, a wagon, or wheels. For reference, 52.8 lbs is about the weight of a bag of concrete. If your use case involves any carrying, the DELTA 3 wins decisively.
How fast can each unit recharge from solar panels in real conditions?
On paper, the Yeti 1500 (6th Gen) accepts 900W vs the DELTA 3's 500W of solar input. What the spec sheet won't tell you: solar panels typically deliver only 60-80% of their rated output due to panel angle, cloud cover, and temperature. In realistic conditions, expect full recharge in about 2.4 hours for the Yeti 1500 (6th Gen) and 2.9 hours for the DELTA 3. That gap widens on cloudy days, when the Yeti 1500 (6th Gen)'s higher input ceiling captures more of whatever sunlight is available. One more thing: summer gives you ~7 productive solar hours per day. Winter drops to ~4. If solar is your primary recharge method, the Yeti 1500 (6th Gen)'s advantage is substantial.
"4,000 vs 3,000 cycles" — what does that actually mean for me?
In real years: the Yeti 1500 (6th Gen) (4,000 cycles) lasts 11.0 years at daily use, 38 years at weekend use (twice a week), or 167 years at twice-monthly camping trips. The DELTA 3 (3,000 cycles): 8.2 years daily, 29 years weekends, or 125 years twice-monthly. What most people miss: hitting the cycle limit doesn't kill your battery. Capacity drops to about 80%. Your 1,505.3Wh unit becomes a ~1,204Wh unit. Still very usable. For weekend users, both batteries will outlast the warranty by years.
Does the DELTA 3's expandability make it the safer long-term buy?
Not necessarily. The DELTA 3 can add EcoFlow batteries, but it starts at 1,024Wh — below the Yeti 1500 (6th Gen)'s sealed 1,505.3Wh. A first expansion battery mostly buys back capacity the Yeti 1500 (6th Gen) already gives you out of the box; expandability only pulls ahead if you expect to grow past 1,505.3Wh. If you don't, the Yeti 1500 (6th Gen)'s larger fixed capacity is the simpler, complete package — not a dead end, just already the bigger battery.
Is EcoFlow or Goal Zero more reliable for long-term ownership?
Both brands have strengths and trade-offs. EcoFlow: Mixed. 2-5 years depending on model (DELTA Pro Ultra line gets 10 years). Some users report smooth claims; others report runarounds. Register your product to extend coverage. Goal Zero: 5 years on LFP models, 2 years on older NMC models. Battery must be charged within 7 days of purchase and every 6 months to maintain warranty (strict). Product reliability concerns have increased — repeat "Battery Fault" errors reported even on newer Yeti Pro 4000. One piece of advice from the power station community: regardless of brand, buy from Costco or Amazon. Their return policies provide a safety net that manufacturer warranties alone can't match, especially for a product you'll rely on in emergencies. Both brands use LFP (lithium iron phosphate) batteries in their current lineup, the most proven chemistry for longevity and safety.
Where to buy
EcoFlow DELTA 3
$599.00
$599.00 · direct from EcoFlow
Last checked 6 days ago. Prices move — check before you buy.
Goal Zero Yeti 1500 (6th Gen)
$1,499.95
$1,499.95 · direct from Goal Zero
Last checked 6 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.