Head-to-head test
EcoFlow DELTA 3 vs BLUETTI AC180
A close 1kWh call: the AC180 is cheaper, holds more, and costs less to own, while the DELTA 3 answers with 8.3 lbs less weight, more surge, a faster UPS, and expandability — for just $20 more.
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
EcoFlow
DELTA 3
3,196Power Score · Appliance Class
$549.00 list · direct from EcoFlow
BLUETTI
AC180
3,200Power Score · Appliance Class
$499.00 list · direct from BLUETTI
Spec deltas
Two 1kWh-class units just $20 apart, but built around different priorities. The BLUETTI AC180 is $499; the EcoFlow DELTA 3 is $519 — and each wins a distinct half of the comparison.
The DELTA 3 is the lighter, more capable unit. At 27 lbs it's 8.3 lbs lighter than the AC180, surges to 3,600W against 2,700W, switches over faster as a UPS (10ms vs 20ms), and is expandable, where the AC180 is sealed.
The AC180 is the value-and-capacity pick. It holds 1,152Wh to the DELTA 3's 1,024Wh, is rated for more cycles (3,500+ vs 3,000), and costs less to own at $0.12 per lifetime kWh versus $0.17 — all for $20 less. This one really does come down to what you weight.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
weight
For a 1kWh unit the DELTA 3's roughly 24% lower weight is a bigger practical difference than the AC180's roughly 11% more capacity — you feel 8 lbs every time you move it.
the DELTA 3 weighs 27 lbs vs the AC180's 35.3the AC180 holds 1,152Wh vs the DELTA 3's 1,024Whthe two are $20 apart
Why it mattersPortability-first buyers should take the DELTA 3; capacity-first buyers the AC180.
rated cycles
More capacity, more cycles, and a lower price give the AC180 a $0.12 per kWh cost-to-own against the DELTA 3's $0.17 — its value-and-longevity edgeB4.
the AC180 costs $0.12 per lifetime kWh vs the DELTA 3's $0.17the AC180 is rated 3,500+ cycles vs the DELTA 3's 3,000the AC180 is $20 cheaper
Why it mattersBuyers optimizing for cost-per-kWh over years should take the AC180.
It starts bigger motors with 900W more surge, backs up electronics with a faster switchover, and can grow — modern capabilities the sealed AC180 lacks.
the DELTA 3 surges to 3,600W vs the AC180's 2,700Wthe DELTA 3 switches over in 10ms vs the AC180's 20msthe DELTA 3 is expandable while the AC180 is sealed
Why it mattersFor demanding loads, faster backup, or future growth, the DELTA 3 leads.
The specific dimensions that decide these two units — everything else is a tie.
What the Specs Don't Tell You
Selected because: The weight-versus-capacity trade at nearly the same price is the crux.
rated cycles
The two split cleanly. The DELTA 3 is the lighter, punchier unit — 27 lbs to the AC180's 35.3, and a 3,600W surge to 2,700W — while the AC180 holds more energy (1,152Wh vs 1,024Wh) for $20 less. Neither is strictly better; they optimize differently.
The weight gap is the one to feel out honestly. At 27 lbs the DELTA 3 is a comfortable one-hand-ish carry; at 35.3 lbs the AC180 is more of a two-handed lug, and reviewers already flag it as heavy for its classB2. If the unit moves often, that 8.3-lb difference outweighs the AC180's modest capacity edge.
Lifetime Value
Selected because: The AC180's lower cost-to-own anchors its value case.
cost / lifetime kWh
The AC180's case is the economics. It's $20 cheaper, holds more, and is rated for more cycles (3,500+ vs 3,000) — together giving it a $0.12 per lifetime kWh cost-to-own against the DELTA 3's $0.17.
Reviewers sum the AC180 up as the definition of bang for buck: the most capacity and power for the priceB4. If you measure value by cost per kWh over years of use and don't move the unit much, it's the more economical choice.
Growth Path
Selected because: Expandability and surge are the DELTA 3's structural advantages.
The DELTA 3's structural edge is flexibility. It's expandable, so you can add capacity later; the AC180 is sealed at 1,152Wh. For a buyer whose needs might grow, that path matters — and the AC180 can't offer it at any price.
It also surges to 3,600W against the AC180's 2,700W and switches over faster as a UPS, so it starts bigger motor loads and backs up sensitive electronics with less interruption. Those are the modern capabilities you're buying into for the extra $20.
Brand Trust
Selected because: Both are well-regarded; quiet/UPS vs value/weight rounds it out.
Both brands are well-regarded here. The DELTA 3's owner data is lighter but positive — reviewers note its fans often stay off entirely at low loads, and its UPS switchover works as advertised, riding through a power cutA1A2. It reads as a quiet, dependable modern unit.
The AC180 has the deeper value reputation, celebrated as a bang-for-buck champion on quality LFP cells rated for 3,500-plus cyclesB3B4, with the trade-offs being its weightB2 and mixed fan-noise reportsB1. Trustworthy units both; the split is portability and capability versus value and capacity.
Strengths & trade-offs
EcoFlow DELTA 3
Strengths
- +Lighter by 8.3 lb
Trade-offs
- –No major technical downsides compared to rival.
BLUETTI AC180
Strengths
- +Costs $50 less
- +Larger battery capacity
Trade-offs
- –No major technical downsides compared to rival.
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 can fully handle this scenario (needs 2,100Wh). You'd need a higher-capacity station or to cut back on usage.
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
A fridge-plus-lights-and-devices blackout wants around 1,645Wh over eight hours, past what either 1kWh-class unit holds alone. The DELTA 3's expansion path is the difference-maker for true whole-outage coverage; the sealed AC180 tops out at its 1,152Wh.
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's roughly 320Wh overnight draw leaves either unit with plenty in reserve — two-plus nights per charge. The DELTA 3's faster line-interactive UPS is the more relevant detail here if the machine is also riding through grid outages.
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
AC180
A laptop-monitor-router day near 910Wh sits right at the edge of the DELTA 3's usable 1,024Wh but comfortably inside the AC180's 1,152Wh. For a full untethered workday with a buffer, the AC180's extra capacity is the safer margin — one of the few everyday scenarios where its capacity edge actually decides the outcome.
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
Either unit
Both handle game day easily. Since capacity isn't the deciding factor, consider weight: the lighter unit is easier to load into a truck bed. Also check if either has Bluetooth speaker-level noise. Fan sound matters in social settings.
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: AC180 runs 4.8h vs 4.2h.
$499 list · direct from BLUETTI
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 0–65.3hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–13.1hHigh-Draw Appliances
These reveal the real limitsscale 0–1h¹ 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 12, 2026
Verdict: the EcoFlow DELTA 3
A genuine toss-up that leans on portability and capability. The EcoFlow DELTA 3 is $519 and weighs just 27 lbs — 8.3 lbs less than the AC180's 35.3 — with a higher 3,600W surge (vs 2,700W), a faster 10ms UPS, and expandability the sealed AC180 lacks. The BLUETTI AC180 is $499 and counters with more capacity (1,152Wh vs 1,024Wh), more cycles (3,500+ vs 3,000), and a lower cost-to-own ($0.12 vs $0.17 per lifetime kWh). Take the DELTA 3 for portability, surge, and expansion; take the AC180 for capacity and value.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 12, 2026. The links below open EcoFlow's and BLUETTI's current prices.
$549.00 list · direct from EcoFlow
or check the AC180 price$499.00 list
Written by Ian Schneider, Solar & Off-Grid Tester · Station Arena Test Desk · Updated July 12, 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 rates 4.3/5 (61st percentile of 24 Everyday-class units), and AC180 rates 4.1/5 (48th 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.
AC180: Fixed Capacity
The DELTA 3 accepts add-on batteries; the AC180 is sealed at 1,152Wh. So the AC180 holds a bit more in its base unit, but only the DELTA 3 can grow past 1kWh — the deciding factor if your needs might climb.
Surge Power: Inverter Quality Indicator
The DELTA 3 surges to 3,600W against the AC180's 2,700W on the same 1,800W continuous rating — more inrush headroom for cold-starting a fridge compressor, pump, or power tool. It's the DELTA's clearest capability edge over the value-focused AC180.
UPS Speed: line-interactive (<10ms) vs standby (<20ms)
The DELTA 3 switches over in about 10ms as a line-interactive UPS; the AC180 is slower at 20ms standby. Both cover most electronics, but the DELTA's faster handoff is the safer bet for a desktop or router that's intolerant of even a brief blink.
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 AC180 wins on both sticker price and long-term value. At $0.12/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. Supports up to 180kWh modular expansion with DELTA Pro Ultra X.
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.
BLUETTI
Ecosystem
One of the broadest lineups — 15-20+ models from budget (AC2A) to flagship (Apex 300, 3072Wh). Includes specialized products: vehicle solar hubs, sodium-ion cold-weather units, and balcony storage systems.
Support
The most inconsistent support in the space. Heavily email-based with China timezone delays. Some users get smooth, efficient service; others report weeks of troubleshooting runarounds, being offered discounts on new units instead of repairs, and confusing third-party purchase claim processes. Buying direct from Bluetti's website tends to produce better support outcomes.
Community
Active and growing — Reddit r/bluetti has a dedicated community. Second-largest after EcoFlow in engagement.
App experience
Rated 4.5/5 iOS and Android — tied for best app experience in the category. V3.0 UI redesign was well-received.
Unique strength
Among the best capacity-to-price ratios available — several Elite and Apex units are the lowest $/Wh in the catalog. Widest product diversity including industry-firsts like sodium-ion cold-weather units and dual solar+alternator vehicle hubs. Full LFP standardization across lineup (3,500-6,000+ cycles). Dual-voltage (120V/240V) in flagships.
Worth knowing
Customer support inconsistency is the #1 risk factor. Older/discontinued units may become unrepairable — no spare parts policy for some models. Some reports of erratic communication from support agents.
Analyst note
EcoFlow brings the deepest ecosystem in portable power, the fastest charging tech, and a highly rated app — set against polarized support experiences and a 2025 recall on an unrelated model. BLUETTI offers the broadest lineup and the best capacity-per-dollar in the category with full LFP standardization, but its support is the most inconsistent in the space, email-based with timezone delays, and buying direct tends to produce better outcomes. Neither service record is a clear win; the DELTA 3's edge is a more active, faster-innovating ecosystem, while the AC180's is raw value.
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.
AC180
FIXED CAPACITYFixed at 1,152Wh, 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.
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 AC180's 1,152Wh, so a first expansion battery largely buys back capacity the AC180 already includes. It only pulls ahead if you'd grow past 1,152Wh — short of that, the AC180's larger fixed capacity is the simpler value.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3
Owner data on the DELTA 3 is lighter but favorable. Reviewers note its fans often stay completely off at low loads, under about 200WA1, and that its UPS switchover works as advertised — a power cut rode through without dropping the loadA2.
Combined with its light 27-lb weight, higher surge, and expandability, it reads as the more portable, capable, and modern of the two units, if a newer one with less long-term data.
“At low loads (under 200W) the fans often stay completely off, making the Delta 3 effectively silent; under moderate load (500–800W) the fans are barely audible from three feet away.”
Sources
portablepowernerd.com · thesolarlab.com · outputreport.com
BLUETTI AC180
The AC180 is celebrated as the definition of bang for buck — not the lightest or smartest, but the most raw capacity and power for the priceB4 — on quality LiFePO4 cells rated for 3,500-plus cyclesB3.
Its caveats are weight, noted as heavy for its classB2, and mixed fan-noise reports, with some finding the fans loud during chargingB1. A dependable value unit whose strengths are capacity and cost, not portability.
“Fan noise draws mixed reports — some find it fairly quiet from a few feet, others call the fans aggressive and loud, especially during charging; a silent charging mode caps the noise by limiting charge speed.”
Sources
outdoorgearlab.com · storagereview.com · kenrockwell.com · voltagebasics.com · bluettipower.com · backuppowerhub.com · solarwithwatts.com · pcworld.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
- Best-in-class value and capacity-per-dollar are the consistent praise; the weight and aggressive fans under load are the recurring caveats. [AC180 · 2 entries]
- A1
“At low loads (under 200W) the fans often stay completely off, making the Delta 3 effectively silent; under moderate load (500–800W) the fans are barely audible from three feet away.”
portablepowernerd.com — EcoFlow Delta 3 Tested: 2026 Hands-On Review; thesolarlab.com · 2026 · [positive]
- A2
“UPS switchover works as advertised — a power cut results in a ~10ms handoff, fast enough that routers don't reset, fridges don't skip a compressor cycle, and CPAP machines don't interrupt therapy.”
outputreport.com / thesolarlab.com — DELTA 3 line UPS testing (observed on DELTA 3 Plus, which shares the 10ms UPS spec) · 2026 · [positive]
- B1
“Fan noise draws mixed reports — some find it fairly quiet from a few feet, others call the fans aggressive and loud, especially during charging; a silent charging mode caps the noise by limiting charge speed.”
outdoorgearlab.com / storagereview.com — BLUETTI AC180 review · 2025-2026 · [mixed]
- B2
“At roughly 35-37 lbs it's heavy for its class — one reviewer named the weight their biggest frustration when moving it around.”
kenrockwell.com / voltagebasics.com — AC180 review · 2025-2026 · [negative]
- B3
“Quality LiFePO4 cells rated for 3,500-plus full cycles before capacity degrades to 80%, backed by a 5-year warranty.”
bluettipower.com / backuppowerhub.com — AC180 review · 2025-2026 · [positive]
- B4
“The definition of bang for buck — not the lightest or smartest, but the most raw power and capacity for the price; widely called the best value in the mid-range at around $499.”
solarwithwatts.com / pcworld.com — BLUETTI AC180 review · 2025-2026 · [positive]
Research compiled July 12, 2026.
Who Should Buy Which
Buy the DELTA 3 if you…
- →You want the lighter, more portable unit — 8.3 lbs less than the AC180.
- →You need the higher 3,600W surge, a faster UPS, or expandability the AC180 lacks.
- →You'll pay $20 more for a more capable, modern unit.
If neither fits
Both are 1kWh-class units. If you need much more capacity, expand the DELTA 3 or step up to a larger model rather than treating either as your ceiling.
The Bottom Line
The EcoFlow DELTA 3 is the pick for portability and capability: 8.3 lbs lighter, a higher 3,600W surge, a faster UPS, and expandability, for just $20 more. If you'll move the unit, start bigger loads, or want room to grow, it's the more versatile choice.
The BLUETTI AC180 is the value-and-capacity pick: more Wh, more cycles, and a lower $0.12 cost-to-own for $20 less, earning its bang-for-buck reputationB4. If you prioritize capacity per dollar over years and don't mind the extra weight, it's the smarter spend.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
EcoFlow DELTA 3 vs BLUETTI AC180 — which should I buy?
The DELTA 3 for portability and capability: at $519 it's 8.3 lbs lighter (27 vs 35.3), surges higher (3,600W vs 2,700W), has a faster UPS, and is expandable. Choose the AC180 for value — at $499 it holds more capacity (1,152Wh vs 1,024Wh), lasts more cycles, and costs less to own. It's a close call that hinges on portability versus capacity.
Which is lighter?
The EcoFlow DELTA 3, at 27 lbs versus the AC180's 35.3 — 8.3 lbs lighter, about 24% less. Reviewers already flag the AC180 as heavy for its class, so for a unit you'll carry or move often, the DELTA 3 is noticeably easier to handle.
Which is cheaper to own?
The BLUETTI AC180, at $0.12 per lifetime kWh versus the DELTA 3's $0.17. It's $20 cheaper upfront, holds more capacity, and is rated for more cycles (3,500+ vs 3,000), so it wins clearly on long-term cost per unit of energy.
Which is better for starting motors?
The EcoFlow DELTA 3. It surges to 3,600W versus the AC180's 2,700W — 900W more headroom for the brief inrush a fridge, pump, or power tool draws at startup. It also switches over faster as a UPS, making it the better pick for motor loads and uninterrupted backup.
Where to buy
EcoFlow DELTA 3Pick
$549.00
$549.00 list · direct from EcoFlow
BLUETTI AC180
$499.00
$499.00 list · direct from BLUETTI
Prices may vary by retailer and are subject to change.