Head-to-head test
EcoFlow DELTA 3 Classic vs BLUETTI AC180
The newer DELTA 3 Classic undercuts the AC180 by $70 and eight pounds while adding a higher surge and an expansion port — the AC180's reply is 128Wh more battery and a slightly longer cycle life.
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
EcoFlow
DELTA 3 Classic
3,341Power Score · Appliance Class
$469.00 list · direct from EcoFlow
BLUETTI
AC180
3,200Power Score · Appliance Class
$499.00 list · direct from BLUETTI
Spec deltas
The cheaper unit here is also the newer, lighter, and more flexible one. The EcoFlow DELTA 3 Classic lands at $429 to the BLUETTI AC180's $499, and it weighs 26.7 pounds against 35.3 — a $70-and-8.6-pound head start before a single other spec.
It presses that lead where it counts. The DELTA 3 Classic surges to 3,600W to the AC180's 2,700, runs quieter (30dB vs 40), switches over fast enough for line-interactive UPS duty, and accepts an expansion battery — where the AC180 is sealed at what it ships with. It's a March 2026 release, so long-term field data is still thinA1, but the early hands-on reviews are strong.
The AC180's answer is capacity and longevity: 1,152Wh to the DELTA 3 Classic's 1,024, and a 3,500-cycle battery to 3,000, which give it a slightly lower cost-to-own and let it clear a full remote workday the DELTA 3 Classic runs just short of. It's the proven value-and-capacity champB4 — but here it's the pricier, heavier unit answering a cheaper, more capable rival.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
weight
The DELTA 3 Classic gives up 128Wh of base capacity but comes back $70 cheaper, 8.6 pounds lighter, and able to add a battery later — while the AC180, whose weight reviewers already flag as its worst traitB2, is fixed at what you buy.
the DELTA 3 Classic costs $429 vs the AC180's $499the DELTA 3 Classic weighs 26.7 lbs vs the AC180's 35.3the DELTA 3 Classic is expandable while the AC180 is sealed
Why it mattersFor carrying, saving, or growing later, the DELTA 3 Classic is the more forgiving choice.
The DELTA 3 Classic's 3,600W surge — double its 1,800W rating — starts motor-driven loads with room the AC180's 2,700W lacks, and its sub-10ms switchover crosses into line-interactive UPS territory where the AC180's 20ms sits a tier back.
the DELTA 3 Classic surges to 3,600W vs the AC180's 2,700Wboth units sustain the same 1,800W outputthe DELTA 3 Classic switches over in about 10ms vs the AC180's 20ms
Why it mattersFor a fridge, a pump, or protecting a desktop PC through an outage, the DELTA 3 Classic is the sturdier inverter.
rated cycles
That extra 128Wh is the margin that finishes a 910Wh remote workday with headroom while the DELTA 3 Classic cuts it close, and the AC180's 500 additional cycles nudge its cost-to-own to $0.12 per lifetime kWh against $0.14 — the one axis where the pricier unit pulls ahead.
the AC180 holds 1,152Wh vs the DELTA 3 Classic's 1,024a laptop-plus-monitor workday draws about 910Whthe AC180 is rated 3,500 cycles vs the DELTA 3 Classic's 3,000
Why it mattersIf you want maximum runtime per charge and the longest life, the AC180 earns its premium.
The specific dimensions that decide these two units — everything else is a tie.
What the Specs Don't Tell You
Selected because: Surge, expansion, and UPS speed are where the DELTA 3 Classic separates.
rated cycles
This is where the DELTA 3 Classic builds its lead. It surges to 3,600W against the AC180's 2,700 — double its own rating, and the number that decides whether a compressor or pump actually starts. It also switches over fast enough for line-interactive UPS duty, a tier ahead of the AC180's 20ms, and it can expand where the AC180 is sealed.
The AC180 doesn't have a spec-level answer here beyond its larger battery. Its 1,152Wh is real and useful, but on surge, cutover speed, and growth path, the newer EcoFlow simply brings more. For anyone running motor loads or protecting sensitive electronics, that cluster matters.
Portability & Form Factor
Selected because: The DELTA 3 Classic's 8.6-lb weight advantage is a headline win.
weight
At 26.7 pounds the DELTA 3 Classic is 8.6 lighter than the 35.3-pound AC180 — the gap between a one-hand grab and a two-hand lift — and one reviewer moving between vehicles noted it felt noticeably lighter than EcoFlow's own DELTA 2A8. The AC180's weight, by contrast, is the trait reviewers most often single out as a frustrationB2.
For a unit that stays under a desk, the pounds vanish. For one that rides to campsites, loads into a trunk, or moves room to room during an outage, the DELTA 3 Classic is the one you won't resent carrying — and it costs $70 less to do it.
Lifetime Value
Selected because: The AC180's capacity and cycle life anchor its narrow value counter.
cost / lifetime kWh
Here the AC180 gets its win. Its 1,152Wh and 3,500-cycle battery bring cost-to-own to $0.12 per lifetime kWh against the DELTA 3 Classic's $0.14, and that extra capacity is what lets it finish a full workday with margin. Reviewers have long called it the bang-for-buck capacity pick in its classB4.
But the gap is narrow, and the DELTA 3 Classic starts $70 cheaper — so the AC180 spends part of its lifetime-value edge just catching up on sticker. It's the better unit if runtime-per-charge is your priority; it's not a decisive value win the way it is against pricier rivals.
Brand Trust
Selected because: EcoFlow's app and the DELTA 3 Classic's newness versus the AC180's proven record.
EcoFlow brings the deeper software story: reviewers call the DELTA 3 Classic's app one of the best on the market, and its Storm Guard auto-charge feature genuinely usefulA6A12. The one asterisk is age — this is a March 2026 release with no multi-month durability record yetA1, so it's an early-adopter bet, if a well-reviewed one.
The AC180 is the known quantity: a proven value unit on a 3,500-cycle LFP battery with a 5-year warrantyB3. Support is inconsistent at both brands, so the practical advice holds — buy from a retailer with an easy return window, and let specs, not reputation, lead.
Strengths & trade-offs
EcoFlow DELTA 3 Classic
Strengths
- +Costs $30 less
- +Lighter by 8.6 lb
Trade-offs
- –No major technical downsides compared to rival.
BLUETTI AC180
Strengths
- +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
Neither unit covers a fridge-plus-lights blackout for a full eight hours alone — the load outruns both batteries. The difference is the exit: the DELTA 3 Classic can add an expansion battery to extend toward whole-outage coverage, and its higher surge starts more of what's in your house, while the sealed AC180 is capped at its 1,152Wh. For outage planning, the EcoFlow has the longer runway.
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
Both clear a CPAP's ~320Wh night several times over, so runtime isn't the question — quiet is. At 30dB the DELTA 3 Classic is the calmer unit 18 inches from your head; the AC180's 40dB fan can get aggressive under load, though a silent charging mode helps. A capacity tie the EcoFlow wins on noise.
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
This is the AC180's scenario. A laptop, monitor, and router day lands near 910Wh — inside the AC180's 1,152Wh with margin, but right at the edge of the DELTA 3 Classic's 1,024Wh. If a full untethered workday is the target, the AC180's extra battery is the safer bet; the DELTA 3 Classic will get you there, but with little 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
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 13, 2026
Verdict: the DELTA 3 Classic
The EcoFlow DELTA 3 Classic is the better buy for most people: at $429 it's $70 cheaper than the $499 BLUETTI AC180, weighs 26.7 lbs to the AC180's 35.3, surges to 3,600W against 2,700, runs quieter (30dB vs 40), switches over faster for UPS duty, and — unlike the sealed AC180 — it can expand. The AC180 holds its ground on capacity (1,152Wh vs 1,024) and cycle life (3,500 vs 3,000), which give it a slightly lower cost-to-own and let it finish a full workday the DELTA 3 Classic just misses. But that's a narrow counter to a unit that's cheaper, lighter, punchier, and more flexible. Unless you specifically need the extra 128Wh, the DELTA 3 Classic wins.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 13, 2026. The links below open EcoFlow's and BLUETTI's current prices.
$469.00 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 13, 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 Classic rates 4.9/5 (91st 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.
The DELTA 3 Classic grows; the AC180 is sealed
The AC180 holds more today (1,152Wh vs 1,024), but it's a closed box — what you buy is the ceiling. The DELTA 3 Classic starts smaller yet accepts an add-on battery when your needs climb. If you're sure 1kWh is enough for good, the AC180's larger fixed pack is the better deal. If you're not, the DELTA 3 Classic buys you the option to expand that the AC180 doesn't offer.
3,600W surge versus 2,700W — the startup margin
Both units sustain the same 1,800W, but their surge headroom is a class apart: the DELTA 3 Classic peaks at 3,600W — double its rating — while the AC180 tops out at 2,700W. Surge is what a fridge, pump, or power tool demands for a split second at startup, so the DELTA 3 Classic has comfortable room where the AC180 runs closer to its limit. For motor-driven loads, that gap is the one to weigh.
Line-interactive versus standby — 10ms against 20ms
The DELTA 3 Classic switches to battery in under 10ms, fast enough to qualify as line-interactive UPS protection; the AC180's 20ms sits a tier back in standby territory. For most appliances the difference is invisible, but for a desktop PC, NAS, or other gear that can trip on a longer gap, the DELTA 3 Classic is the safer bet to keep things running through a cutover.
Full record above — the Test Desk pick is the DELTA 3 Classic.
Check DELTA 3 Classic price →or check the AC180 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 Classic is cheaper to buy, but the AC180 is cheaper to own. At $0.12/kWh over its lifetime vs $0.15/kWh, the AC180's higher cycle life and capacity make each dollar go further over the years.
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 deeper ecosystem and, on the DELTA 3 Classic, one of the best-rated apps in the category, plus smart features like Storm Guard auto-charging — though this is a very new 2026 model without a long durability record yet. BLUETTI counters with the AC180's proven value reputation and the broadest lineup around, on a mature 3,500-cycle platform. Support is inconsistent at both, so the practical hedge is identical: buy from a retailer with a painless return window, and let the DELTA 3 Classic's price-and-capability edge or the AC180's capacity, not the badge, make the call.
Growth path
DELTA 3 Classic
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 Classic'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 Classic
The DELTA 3 Classic is a March 2026 release, so this is an early-adopter snapshot rather than mature field dataA1. Within that, hands-on reviews are consistent: a fast ~55-minute wall charge, low 17W idle drain, a front-facing port layout, and one of the best apps in the categoryA1A2A4A6. Its 1,800W inverter even handles the startup surge of a small window AC, though runtime on that load is shortA10.
The recurring critique is its 500W solar cap, which more than one outlet calls low for a 2026 unitA5A9. A quiet, well-designed, fast-charging unit whose main compromise is solar input.
“In our tests, the DELTA 3 Classic charged from empty to full plugged into a standard wall outlet in just shy of 55 minutes.”
Sources
thesolarlab.com · vantour.net · smartenergyedge.com · walmart.com
BLUETTI AC180
The AC180 is the proven value-and-capacity pick — reviewers call it the definition of bang for buck, the most raw power and capacity for around $499B4, on quality LFP cells rated past 3,500 cycles with a 5-year warrantyB3.
Its caveats are weight and noise: at 35-plus pounds it's flagged as heavy for its classB2, and its fans draw mixed reports, with some owners finding them aggressive during chargingB1. A dependable, capacious unit you accept some bulk for.
“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
- Multiple independent reviewers note the unit is quieter than expected for its price point, with low idle drain. [DELTA 3 Classic · 2 entries]
- The 500W solar input cap is flagged as a limiting factor by more than one review outlet, seen as low for a 2026-era release. [DELTA 3 Classic · 2 entries]
- Reviewers praise the app and Storm Guard/smart features as standout software elements. [DELTA 3 Classic · 2 entries]
- 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
“In our tests, the DELTA 3 Classic charged from empty to full plugged into a standard wall outlet in just shy of 55 minutes.”
thesolarlab.com — EcoFlow DELTA 3 Classic Review: Cheap, Quiet & Useful? · unknown (post-launch 2026) · [positive]
- A2
“We measured the idle draw to be roughly 17W per hour.”
thesolarlab.com — EcoFlow DELTA 3 Classic Review: Cheap, Quiet & Useful? · unknown (post-launch 2026) · [positive]
- A4
“EcoFlow moved back to a more sensible front-facing layout: AC outlets and USB ports on the front, charging inputs on the back”
thesolarlab.com — EcoFlow DELTA 3 Classic Review: Cheap, Quiet & Useful? · unknown (post-launch 2026) · [positive]
- A5
“the screen only showed 500 W input”
vantour.net — EcoFlow Delta 3 Classic: Our review, test and promo code · 3 weeks ago (~June 2026) · [negative]
- A6
“it is clearly one of the best-designed apps on the market”
vantour.net — EcoFlow Delta 3 Classic: Our review, test and promo code · 3 weeks ago (~June 2026) · [positive]
- A8
“It also seems noticeably lighter than the EcoFlow DELTA 2 that we currently have in the motorhome.”
vantour.net — EcoFlow Delta 3 Classic: Our review, test and promo code · 3 weeks ago (~June 2026) · [positive]
- A9
“EcoFlow pushes the fast charging hard, but the DELTA 3 Classic is capped at 500W solar input”
smartenergyedge.com — EcoFlow DELTA 3 Classic Review: Better Than the DELTA 2? · 1 week ago (~July 2026) · [negative]
- A10
“The 1,800W inverter handles the startup surge of a small window AC unit just fine, but the runtime is short.”
smartenergyedge.com — EcoFlow DELTA 3 Classic Review: Better Than the DELTA 2? · 1 week ago (~July 2026) · [mixed]
- A12
“The Storm Guard auto-charge feature is smart and genuinely useful.”
smartenergyedge.com — EcoFlow DELTA 3 Classic Review: Better Than the DELTA 2? · 1 week ago (~July 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 13, 2026.
Who Should Buy Which
Buy the DELTA 3 Classic if you…
Buy the AC180 if you…
- →You want the most runtime per charge — 1,152Wh clears a full workday the DELTA 3 Classic just misses.
- →You want the longest-proven track record and the slightly lower cost-to-ownB4.
- →You'll keep it stationary, so its extra weight never leaves the floor.
If neither fits
Both sit near 1kWh, so neither covers a full 8-hour blackout alone — and only the DELTA 3 Classic can expand toward it. If you need whole-outage coverage in one box, step up to a 1.5-2kWh unit rather than maxing out either of these.
The Bottom Line
The DELTA 3 Classic is the smarter buy for most people: $70 cheaper than the AC180, 8.6 pounds lighter, with a stronger 3,600W surge, faster UPS switchover, quieter operation, and an expansion path the sealed AC180 lacks — all wrapped in one of the category's best appsA6. As a March 2026 release it's the newer betA1, but the early reviews back it up.
The AC180 keeps a real, narrow lane: 128Wh more capacity and a longer cycle life, which give it the edge in runtime-per-charge and a slightly lower cost-to-ownB4. If you want the most energy per charge and a longer-proven record, it's worth the extra $70 and weight. For everyone else, the cheaper, lighter, punchier DELTA 3 Classic takes it.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
EcoFlow DELTA 3 Classic vs BLUETTI AC180 — which should I buy?
The DELTA 3 Classic for most buyers. At $429 it's $70 cheaper, 8.6 pounds lighter, surges higher (3,600W vs 2,700), runs quieter, and can expand — where the AC180 is sealed. Choose the AC180 if you want the most capacity (1,152Wh vs 1,024) and the longest cycle life, which let it run slightly longer per charge and cost a touch less to own.
Is the DELTA 3 Classic's 500W solar input a dealbreaker?
Only if solar is your main charging source. Reviewers flag the 500W cap as low for a 2026 release, so panel recharging is slower than some rivals. But the AC180 shares the same 500W solar limit, so between these two it's a wash — and the DELTA 3 Classic makes up ground with a fast ~55-minute wall charge.
Which is better for running a fridge or during an outage?
The DELTA 3 Classic. Its 3,600W surge gives motor-driven appliances like fridges and pumps more room to start than the AC180's 2,700W, and its sub-10ms switchover is fast enough for line-interactive UPS protection of sensitive electronics. The AC180 holds more total energy, but the DELTA 3 Classic is the sturdier inverter for startup-heavy loads.
Which lasts longer per charge?
The AC180, thanks to its larger 1,152Wh capacity versus the DELTA 3 Classic's 1,024 — about 128Wh more, enough to finish a full remote workday with headroom the DELTA 3 Classic doesn't quite have. It also carries a slightly longer 3,500-cycle rating. If maximum runtime per charge is your priority, the AC180 is the one to get.
Where to buy
EcoFlow DELTA 3 ClassicPick
$469.00
$469.00 list · direct from EcoFlow
BLUETTI AC180
$499.00
$499.00 list · direct from BLUETTI
Prices may vary by retailer and are subject to change.