Head-to-head test
EcoFlow DELTA 3 Max vs BLUETTI AC180P
The Delta 3 Max costs $200 more but is cheaper to own per lifetime kWh ($0.10 against $0.12), clears the 8-hour blackout scenario the AC180P can't, and is quieter and faster to recharge from the sun — the AC180P's real advantage is being the lighter box, not the better one.
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
EcoFlow
DELTA 3 Max
4,337Power Score · Appliance Class
$849.00 list · direct from EcoFlow
BLUETTI
AC180P
3,318Power Score · Appliance Class
$649.00 list · direct from BLUETTI
Spec deltas
The Delta 3 Max costs $799 against the AC180P's $599, a real $200 gap — and it still comes out cheaper per lifetime kWh, at $0.10 against $0.12. That's the first surprise on this page: the pricier unit is also the better long-run deal.
It backs that up everywhere else that matters for an outage. The Delta 3 Max clears the 8-Hour Blackout scenario at 94% of its usable capacity; the AC180P needs 134% and runs out before the outage does. It also takes 1,000W of solar against the AC180P's 500W, runs 15dB quieter, and switches over faster during a power event.
The AC180P's honest case is physical, not spec-sheet: at 35.3 lbs it's 15.4 lbs lighter than the Delta 3 Max, and it costs less today. If your capacity needs actually fit inside 1,440Wh and you're the one lifting it, that's a real reason to save the $200 rather than a consolation prize.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
That's because the Delta 3 Max moves 8,192 total lifetime kWh against the AC180P's 5,040 — a genuinely bigger total energy budget across its rated cycles — so the higher price is amortized over more work, not just more capacity.
The Delta 3 Max costs $799 against the AC180P's $599, a $200 gapThe Delta 3 Max costs $0.10 per lifetime kWh against the AC180P's $0.12
Why it mattersBuyers focused only on the $200 gap at checkout are pricing the wrong thing; the real comparison is what each dollar buys across the unit's full working life, and there the Delta 3 Max wins.
solar input
A blackout that runs into a second day turns solar input into the deciding spec, and twice the input roughly halves the time to top back up — the AC180P's smaller tank and slower solar recharge compound against each other in exactly the scenario where that matters most.
The Delta 3 Max needs 94% of its usable capacity to clear the 8-Hour Blackout scenario; the AC180P needs 134%The Delta 3 Max accepts 1,000W of solar against the AC180P's 500W — twice the input
Why it mattersAnyone sizing around a real multi-day outage should weight solar input as heavily as capacity — the Delta 3 Max wins on both.
That combination typically costs weight, and here it partly does — 50.7 lbs against 35.3 — but the AC180P doesn't get the noise or switchover advantage back in exchange for being lighter; it's simply behind on both.
The Delta 3 Max is rated 30dB under load against the AC180P's 45dB, a 15dB gapThe Delta 3 Max's UPS switchover is rated under 10ms against the AC180P's 20ms
Why it mattersBuyers who need quiet, fast-switching backup for sensitive electronics get both from the Delta 3 Max and pay for it only in pounds, not in a spec tradeoff.
weight
It's the same trade as every bigger, more capable unit in this category: more capacity and a real growth path cost real weight, and the AC180P's only structural advantage on this page is that it's the lighter box to actually lift.
The Delta 3 Max weighs 50.7 lbs against the AC180P's 35.3 lbs, a 15.4-lb differenceThe Delta 3 Max supports real EcoFlow expansion batteries; the AC180P's spec sheet lists no expansion port, and owner reports confirm it only recharges from external packs through Power Bank ModeA3
Why it mattersBuyers who carry the unit themselves and don't need to grow past 1,440Wh have a real, honest reason to take the lighter AC180P despite trailing on nearly every other number.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: The core surprise — the pricier unit is also cheaper per lifetime kWh.
cost / lifetime kWh
This is the rare pairing where the more expensive unit wins on cost per lifetime kWh outright: $0.10 for the Delta 3 Max against $0.12 for the AC180P, despite the $200 higher sticker price. The reason is capacity and cycle life compounding together — 2,048Wh at 4,000 rated cycles against 1,440Wh at 3,500.
Cost per warranty-year still favors the AC180P nominally, since it's simply the cheaper unit over the same 5-year term. But that's the only lifetime-cost number that goes the AC180P's way on this page.
Your Life, Your Pick
Selected because: The 8-Hour Blackout split, plus solar recharge speed, is the clearest real-world decision point.
The 8-Hour Blackout scenario is the clearest split: the Delta 3 Max clears it at 94% of usable capacity, the AC180P falls short at 134%. Remote Workday and Tailgate Party both go to the Delta 3 Max too, though the AC180P technically covers them with a thinner margin.
CPAP Overnight is a clean tie, both units using only a small share of their capacity. Weekend Camping and Van Life Daily defeat both units — this isn't the pairing for either of those, and the real decision stays with the blackout scenario above.
What the Specs Don't Tell You
Selected because: Five gotchas fire here — expansion, noise, UPS, surge, and warranty all favor the Delta 3 Max to varying degrees.
rated cycles
Expansion is the clearest warning-level gap: the Delta 3 Max genuinely accepts EcoFlow's add-on batteries, and the AC180P has no port for it at all. Noise and UPS speed follow the same direction — 15dB quieter and roughly half the switchover time — while surge headroom is wider in both absolute and proportional terms on the Delta 3 Max.
Warranty term is identical at 5 years for both units; the difference is purely in what you pay per year of coverage, and that's the one number where the cheaper AC180P comes out ahead.
Brand Trust
Selected because: Cross-brand pairing where EcoFlow's ecosystem and BLUETTI's value reputation are both genuinely in play.
EcoFlow's brand-wide strengths are the largest ecosystem and community in the category and the fastest charging technology across its lineup, weighed against a 2025 recall on an unrelated model and a short-lived subscription-paywall experiment the community pushed back on. BLUETTI's draw is capacity-per-dollar across its whole lineup, weighed against the least consistent support of the major brands.
Neither brand-wide reputation changes this specific matchup: the Delta 3 Max is the better unit on the numbers here regardless of EcoFlow's recall history, and the AC180P's price and weight advantages hold regardless of BLUETTI's support record.
Strengths & trade-offs
EcoFlow DELTA 3 Max
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$200) than the AC180P.
- –Significantly heavier (+15.4 lbs), making it harder to move.
BLUETTI AC180P
Strengths
- +Costs $200 less
- +Lighter by 15.4 lb
Trade-offs
- –Weaker inverter (-600W) limits appliance compatibility.
- –Sealed capacity — the DELTA 3 Max can add batteries to grow past 1,440Wh; this one can't.
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
Both fall short here — the Delta 3 Max needs 121% of its usable capacity and the AC180P needs 172%. Neither is sized for a full weekend away from a wall outlet; this one's a bigger-capacity problem, not a pick-between-these-two problem.
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
DELTA 3 Max
The Delta 3 Max clears this one at 94% of its usable capacity; the AC180P needs 134% and comes up short. This is the scenario this size class gets bought for, and it's the clearest split on the page.
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 are wildly overqualified for CPAP. You're using 26% or less. Save your money and buy whichever is cheaper; the extra capacity is completely wasted on a 40W overnight load. Put the savings toward a second battery for multi-night trips.
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
DELTA 3 Max
The DELTA 3 Max gives you a comfortable buffer at 52%. Enough to work late, join extra video calls, or charge a second device without worry. The AC180P at 74% works but leaves less room for the unexpected. For daily remote work, that peace of mind matters.
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 Max
Both handle game day, and the DELTA 3 Max does it with more in reserve — 38% used against 55%. Tailgating is a light load, so that headroom counts for less here than the 15 lbs you'll actually carry across the parking lot.
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 Max runs 8.5h vs 6h.
$849 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 0–116.1hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–23.2hHigh-Draw Appliances
These reveal the real limitsscale 0–1.7h¹ 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 Max, on Power Score margin
The Delta 3 Max wins almost every spec that matters: $0.10 per lifetime kWh against the AC180P's $0.12, 608Wh more capacity, double the solar input, 15dB quieter, and a UPS switchover under 10ms against 20ms. It clears the 8-Hour Blackout scenario at 94% of usable capacity where the AC180P needs 134% and comes up short. Its one honest weakness is weight — 50.7 lbs against the AC180P's 35.3 — and the $200 higher sticker price. If you carry the unit yourself and your needs top out around 1,440Wh, the AC180P is a legitimate lighter, cheaper choice. Otherwise the Delta 3 Max is worth the extra money and the extra pounds.
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 BLUETTI's current prices.
$849.00 list · direct from EcoFlow
or check the AC180P price$649.00 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
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 — 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 Max rates 4.4/5 (63rd percentile of 25 Large-class units), and AC180P rates 4.0/5 (43rd 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.
15 Decibels Is Impossible to Miss
The Delta 3 Max runs at 30dB under load against the AC180P's 45dB. It's the widest noise gap on this page, and it's unconditional — no special mode required to get it.
The Delta 3 Max Is the One That Actually Grows
The Delta 3 Max genuinely accepts EcoFlow's add-on batteries. The AC180P has no expansion port at all — it can recharge from an external pack, but that pack never becomes part of its own capacity. If growth matters to you, this gotcha doesn't split the difference.
Bigger Ratio, Bigger Absolute Number
The Delta 3 Max surges to 4,800W against a 2,400W continuous rating, a 2x cushion. The AC180P surges to 2,700W against 1,800W continuous, a 1.5x cushion. Unlike some pairings on this site, the Delta 3 Max wins both the ratio and the absolute headroom here.
Half the Switchover Time
The Delta 3 Max's UPS switchover is rated under 10 milliseconds against the AC180P's 20. Most devices won't notice either gap, but anything genuinely sensitive to a power interruption will notice the Delta 3 Max's is faster.
Same Term, Cheaper Per Year
Both carry a 5-year warranty. The AC180P costs less per warranty-year simply because it costs less to buy — the one lifetime-cost number on this page that goes the AC180P's way.
Full record above — the Test Desk pick is the DELTA 3 Max.
Check DELTA 3 Max price →or check the AC180P 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 AC180P is cheaper to buy, but the DELTA 3 Max is cheaper to own. At $0.1/kWh over its lifetime vs $0.13/kWh, the DELTA 3 Max'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 positions itself as a mid-to-premium brand with stronger support infrastructure, while BLUETTI competes on value. The question is whether the EcoFlow ecosystem and support premium is worth it for your use case.
Growth path
DELTA 3 Max
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 2,048Wh.
Accepts up to 1,000W of solar. Enough for a serious multi-panel array.
Generous port selection supports complex multi-device setups.
Expansion batteries are EcoFlow-specific. You're investing in the EcoFlow ecosystem.
AC180P
FIXED CAPACITYFixed at 1,440Wh, 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
The AC180P is sealed at 1,440Wh, which is fine if that covers you. The DELTA 3 Max starts at 2,048Wh and can grow beyond it with EcoFlow expansion batteries — real headroom the AC180P doesn't have if your needs climb toward partial-home backup.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3 Max
Independent reviewers call the Delta 3 Max whisper-quiet under moderate load — close to silent at conversational distance — with the EcoFlow app adding a dedicated quiet mode and a custom charge-speed limit for anyone who wants to tune fan noise furtherA1A2.
It also held up to real abuse in testing: capacity stayed consistent across repeat measurements, and the unit survived truck-bed transport plus storage in both a hot garage and near-freezing conditions without issueA3. Reviewers rate it near the top of the 2kWh class overall, citing fast recharge and LFP longevity as the strongest parts of its value caseA4.
“Whisper-quiet under moderate load — essentially silent at conversational distance; the app adds a low-power quiet mode and a custom charge-speed limit if fan noise bothers you. Fans rise under heavy load but stay quieter than most competitors in the 2kWh class.”
Sources
backuppowerhub.com · thesolarlab.com · androidguys.com
BLUETTI AC180P
The AC180P's clearest physical advantage on this page is its weight — at 35.3 lbs it's the one you can still lift out of a trunk without bracing, where the Delta 3 Max asks more of youA4. Reviewers also confirm its fast-charge claim held up under independent testing, not just on the spec sheet, backed by a Power Lifting Mode rated to 2,700W for tools that would trip a smaller inverterA1A2.
The correction that matters most against a genuinely expandable rival: despite an "expandable" label on some listings, the AC180P has no true expansion port — it only recharges from external packs through Power Bank ModeA3. Against the Delta 3 Max's real add-on batteries, that's the clearest structural gap on this page.
“Delivers 1,440Wh of LiFePO4 capacity and 1,800W continuous output, with a Turbo Charge feature reaching 0-80% in roughly 45 minutes and a Power Lifting Mode that delivers 2,700W to run high-powered devices.”
Sources
backuppowerhub.com · bluettipower.com · batteryskills.com · the-gadgeteer.com · bestgeneratorsolar.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
- Reviewers consistently praise practical quietness (with app-based quiet/charge-limit modes) and the EcoFlow app/ecosystem as differentiators. [DELTA 3 Max · 2 entries]
- Fast Turbo charging, strong owner ratings, and a useful Power Lifting Mode are the praise; the key clarification is that it does NOT accept true battery expansion despite some listings. [AC180P · 3 entries]
- A1
“Whisper-quiet under moderate load — essentially silent at conversational distance; the app adds a low-power quiet mode and a custom charge-speed limit if fan noise bothers you. Fans rise under heavy load but stay quieter than most competitors in the 2kWh class.”
backuppowerhub.com — EcoFlow DELTA 3 Max Review; thesolarlab.com — DELTA 3 Max Review · 2026 · [positive]
- A2
“The EcoFlow app is one of the main reasons people migrate to the ecosystem: deep control including a custom charge-speed limit and quiet mode, well beyond the on-device interface.”
androidguys.com / thesolarlab.com — EcoFlow DELTA 3 Max line · 2026 · [positive]
- A3
“Capacity stayed consistent between 1-month and 3-month tests (within measurement error). The unit survived truck-bed transport, storage in a ~105°F garage, and operation near freezing (~34°F) without issue.”
backuppowerhub.com — EcoFlow DELTA 3 Max Review (hands-on) · 2026 · [positive]
- A4
“Rated 8.5/10 overall — strong across nearly every metric in the 2kWh class, with fast recharge and LFP longevity called one of the best value propositions in the segment.”
backuppowerhub.com — EcoFlow DELTA 3 Max Review · 2026 · [positive]
Research compiled July 14, 2026.
Who Should Buy Which
Buy the DELTA 3 Max if you…
- →You're sizing around a real multi-day outage: the Delta 3 Max clears the 8-Hour Blackout scenario where the AC180P falls short, and its double solar input refills faster once the sun's out.
- →Quiet, fast-switching backup for sensitive electronics matters to you — 15dB quieter and roughly half the UPS switchover time, with no tradeoff to offset it.
Buy the AC180P if you…
- →You carry the unit yourself and want the lighter lift — 35.3 lbs against 50.7 is a real difference at the tailgate or the trunk.
- →Your actual needs stay inside 1,440Wh and you'd rather keep the $200 than pay for headroom the Delta 3 Max offers but you won't use.
If neither fits
If you're planning around Weekend Camping (about 2,100Wh) or Van Life Daily (about 4,685Wh), both units fall short — even the Delta 3 Max's bigger tank doesn't clear either scenario. Look at a larger-capacity unit from either brand before choosing between these two.
The Bottom Line
The Delta 3 Max costs $200 more and still wins on cost per lifetime kWh, clears the 8-hour blackout scenario the AC180P can't, and beats it on solar input, noise, and UPS speed. Its only real cost is 15.4 more pounds to carry.
Buy the Delta 3 Max if you're sizing around a genuine outage or want the better long-run numbers. Buy the AC180P only if your needs fit inside 1,440Wh and the lighter, cheaper box is worth more to you than everything the Delta 3 Max does better.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
EcoFlow Delta 3 Max vs BLUETTI AC180P — which is cheaper to own?
The Delta 3 Max, despite costing $200 more upfront ($799 against $599). It works out to $0.10 per lifetime kWh against the AC180P's $0.12, because its larger capacity and higher rated cycle count move more total energy over its working life.
Which one handles a real power outage better?
The Delta 3 Max. It clears the 8-Hour Blackout scenario at 94% of its usable capacity, while the AC180P needs 134% and runs out before the outage ends. The Delta 3 Max also takes twice the solar input, so it refills faster once the sun's back out.
Does the AC180P support expansion batteries?
No. The AC180P's spec sheet correctly lists no expansion port, and owner reports confirm it only recharges from external battery packs through Power Bank Mode rather than adding true capacity. The Delta 3 Max genuinely accepts EcoFlow's add-on batteries.
Is the AC180P worth buying if the Delta 3 Max wins on almost everything?
Yes, if weight or price is your deciding factor. At 35.3 lbs it's 15.4 lbs lighter than the Delta 3 Max, and it costs $200 less today. If your needs genuinely fit inside 1,440Wh, that's a real reason to pick it, not a consolation prize.
Which one is quieter?
The Delta 3 Max, by 15dB — rated at 30dB under load against the AC180P's 45dB. It's the widest noise gap on this page, and it comes with no offsetting advantage for the louder AC180P.
Where to buy
EcoFlow DELTA 3 MaxPick
$849.00
$849.00 list · direct from EcoFlow
BLUETTI AC180P
$649.00
$649.00 list · direct from BLUETTI
Prices may vary by retailer and are subject to change.