Head-to-head test
EcoFlow DELTA 2 Max vs BLUETTI AC240P
The DELTA 2 Max is rated for 30dB of fan noise against the AC240P's 45dB — a 15-decibel gap on paper that owners say doesn't fully survive contact with a real load.
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
EcoFlow
DELTA 2 Max
4,071Power Score · Appliance Class
$949.00 list · direct from EcoFlow
BLUETTI
AC240P
3,528Power Score · Appliance Class
$1,461.99 list · direct from BLUETTI
Spec deltas
30dB and 45dB. That's the DELTA 2 Max's rated fan noise against the BLUETTI AC240P's — a 15-decibel gap that would settle most noise-sensitive purchases outright, except owners report the DELTA 2 Max's fans get noticeably louder once you put a real load or a charge cycle on itA1.
Everything else favors the DELTA 2 Max more cleanly. It's $1,297 against the AC240P's $1,939 — $642 less — while holding 205Wh more capacity, and it costs $0.21 per lifetime kWh against the AC240P's $0.30.
It's also 21.3 lbs lighter at 50.7 lbs against 72, and its 4,800W surge rating gives a fridge or AC compressor twice its own rated 2,400W output to slam into on startup, against the AC240P's 1.5 times. What the AC240P buys back is a sealed IP65 shell, 500 more rated cycles, and a UPS switchover five milliseconds faster — none of it visible until the day you actually need it.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
EcoFlow's own Quiet Charging mode exists specifically to trade charge speed for less fan noiseA1 — proof the fans get loud enough under normal charging that the company built a workaround for it. The AC240P's 45dB rating, by contrast, is stated as its figure under load, not an idle best case.
The DELTA 2 Max's noise rating is 30dB against the AC240P's 45dBOwners report the DELTA 2 Max's fans get noticeably louder under heavy load or while chargingA1
Why it mattersCPAP buyers or anyone sleeping near the unit should treat the DELTA 2 Max's 30dB as a light-load number, not a promise, and plan on reaching for Quiet Charging on a recharge night.
That extra surge headroom comes bundled with the cheaper, lighter unit, not a premium one — the tradeoff usually runs the other way.
The DELTA 2 Max surges to 4,800W against its own 2,400W rated output, twice the headroomThe AC240P surges to 3,600W against its own 2,400W rated output, one and a half times the headroom
Why it mattersAnyone starting a fridge or window AC compressor off either unit should lean toward the DELTA 2 Max's wider surge margin; it's not paying extra for that headroom, it's getting it as part of the cheaper package.
weight
The AC240P's extra 21.3 lbs is largely the sealed, gasketed IP65 shell — weight spent on ruggedness, not on more battery, since it actually holds 205Wh less.
The DELTA 2 Max weighs 50.7 lbs against the AC240P's 72The DELTA 2 Max costs $0.21 per lifetime kWh against the AC240P's $0.30
Why it mattersBuyers who don't need to leave a unit exposed to weather get a lighter, cheaper-to-run station in the DELTA 2 Max with no real tradeoff; buyers who do need that shell are paying for it in both pounds and dollars.
rated cycles
But it's refilling a smaller tank to start with — 1,843Wh against 2,048Wh — so 200W of extra solar input is topping off 205Wh less energy, not necessarily arriving meaningfully sooner in absolute charge time.
The AC240P accepts up to 1,200W of solar input against the DELTA 2 Max's 1,000WThe AC240P is rated for 3,500 cycles and a 6-year warranty against the DELTA 2 Max's 3,000 cycles and 5-year warranty
Why it mattersBuyers picking on paper longevity and solar speed alone should note the AC240P is also refilling less battery; the real-world gap is smaller than the two round numbers suggest.
The specific dimensions that decide these two units — everything else is a tie.
Your Life, Your Pick
Selected because: The 8-Hour Blackout scenario is the one hard line between otherwise evenly matched units.
Remote Workday, Tailgate Party, and CPAP Overnight all land in the same safe zone for both units — neither breaks a sweat, so those don't decide anything. The 8-Hour Blackout is where the numbers actually split: the DELTA 2 Max covers it at 94% of the needed 1,645Wh, the AC240P needs 105% and can't finish.
Weekend Camping and Van Life Daily overwhelm both units regardless of brand — 121% and 269% of what's needed on the DELTA 2 Max, worse on the AC240P. If either of those is the actual use case, this comparison doesn't matter; neither one is sized for it.
What the Specs Don't Tell You
Selected because: Surge headroom and the noise-rating honesty catch are the two real gotchas for this pair.
rated cycles
The surge numbers are the more decisive gotcha here: the DELTA 2 Max's 4,800W surge gives it twice its own rated output as headroom for a fridge or AC compressor's startup spike, against the AC240P's one and a half times. That margin is what decides whether a compressor actually starts, not just runs once it's going.
Noise cuts the other way once you look past the spec sheet. The DELTA 2 Max's 30dB rating is real at light load, but owners say it climbs meaningfully once you're charging it or running it hardA1 — closer to the AC240P's stated 45dB-under-load figure than the spec comparison suggests. The AC240P's 15ms switchover against 20ms is a genuine, unconditional edge for anything that can't tolerate a power gap.
Lifetime Value
Selected because: A meaningful but not dramatic cost-per-kWh gap, worth surfacing plainly.
cost / lifetime kWh
$0.21 per lifetime kWh for the DELTA 2 Max against $0.30 for the AC240P — the DELTA 2 Max is the cheaper unit to run, though the gap is narrower than its $642 price advantage suggests, because the AC240P is spreading its higher price over fewer total lifetime kilowatt-hours.
The AC240P's 500 extra rated cycles and extra warranty year are real, but they're refilling a smaller battery — 1,843Wh against 2,048Wh. At $323 a warranty year against $259, it's still the more expensive unit to own, even counting the added year.
Brand Trust
Selected because: Cross-brand pair — support and ecosystem differences are real and worth a plain read.
EcoFlow and BLUETTI sit at opposite ends of the support experience in this category: EcoFlow's is polarized between hassle-free replacements and drawn-out claims depending on where you bought it, while BLUETTI's is the more consistently slow one, weighed down by overseas email delays. Neither reputation should decide this specific matchup, but it's worth knowing going in.
Where the ecosystems actually diverge is expansion depth versus value: EcoFlow's catalog has the deepest modular expansion path in the category, while BLUETTI's strength is closer to best capacity-per-dollar across a wide lineup. If you're building toward a bigger system down the road, EcoFlow's ecosystem has more places to grow into.
Strengths & trade-offs
EcoFlow DELTA 2 Max
Strengths
- +Costs $513 less
- +Lighter by 21.3 lb
- +Larger battery capacity
Trade-offs
- –No major technical downsides compared to rival.
BLUETTI AC240P
Strengths
- +Longer warranty
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$513) than the DELTA 2 Max.
- –Significantly heavier (+21.3 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 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
DELTA 2 Max
The AC240P runs out of juice. It only has 1,567Wh usable, but this scenario needs 1,645Wh. The DELTA 2 Max covers it and still has 6h of phone charging left over.
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 20% 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
Either unit
Both power your workstation all day without breaking a sweat. At these utilization levels, prioritize the unit with better USB-C output for direct laptop charging. It's more convenient than using the AC inverter and wastes less energy.
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: DELTA 2 Max runs 8.5h vs 7.6h.
$949 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 2 Max
The DELTA 2 Max wins the spreadsheet: $1,297 against the AC240P's $1,939, 205Wh more capacity, $0.21 per lifetime kWh against $0.30, and 21.3 lbs less to carry. Its 4,800W surge rating also gives a fridge or AC compressor twice its own rated output as startup headroom, against the AC240P's 1.5 times. The one number that needs an asterisk is noise: the 30dB rating is real at light load, but owners report the fans climb noticeably once you're charging it or running it hardA1, which narrows the gap with the AC240P's 45dB-under-load figure. The AC240P earns its price back with a sealed IP65 shell, 500 more rated cycles, an extra warranty year, and a UPS switchover five milliseconds faster. Buy the DELTA 2 Max unless the unit is going to live somewhere wet or dusty.
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.
$949.00 list · direct from EcoFlow
or check the AC240P price$1,461.99 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): CPAP, Apartment Balcony.
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 2 Max rates 3.9/5 (33rd percentile of 25 Large-class units), and AC240P rates 4.2/5 (52nd 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.
AC240P: 72 lbs Is a Commitment
At 72 lbs, this is manageable but not fun to carry. That's heavier than a large checked suitcase. Moving it from your car to a campsite requires some effort and flat terrain.
30dB Is the Light-Load Number
The DELTA 2 Max's 30dB rating holds at idle or light draw, but push a real load through it or start a charge cycle and the fans climb well past that, closer to the AC240P's 45dB-under-load figure than the sticker suggests. Give it airflow clearance and expect to notice it during a recharge.
Surge Headroom, Not Just Surge Numbers
4,800W against a 2,400W rating is twice the surge headroom; 3,600W against the same 2,400W is one and a half times. That gap is what actually decides whether a fridge or window AC compressor's startup spike gets through without tripping the inverter.
UPS Speed: standby (<20ms) vs standby (<20ms)
The AC240P switches to battery in 15ms (standby (<20ms)), while the DELTA 2 Max takes 20ms (standby (<20ms)). Most electronics handle this fine, but sensitive server equipment may hiccup. This matters if you're using it as a home UPS for always-on equipment.
Warranty Value Comparison
The DELTA 2 Max gives you 5.3 years of warranty per $1,000 spent, vs the AC240P's 4.1 years. That's 1.3× more coverage per dollar. An underrated factor if you're keeping this unit for years.
Full record above — the Test Desk pick is the DELTA 2 Max.
Check DELTA 2 Max price →or check the AC240P 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 2 Max wins on both sticker price and long-term value. At $0.15/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
Both companies build genuinely reliable LFP hardware; the real gap between them isn't the battery, it's the experience around it, since support responsiveness and expansion depth vary more than build quality does. Buying either directly from the manufacturer rather than a marketplace listing tends to produce a smoother support experience with both.
Growth path
DELTA 2 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.
AC240P
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 1,843Wh.
Accepts up to 1,200W of solar. Enough for a serious multi-panel array.
Adequate ports for most setups, but heavy users may want a power strip.
Expansion batteries are BLUETTI-specific. You're investing in the BLUETTI ecosystem.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Both expand, so neither locks you out of growth — decide on capacity, price, and the rest, not the expansion checkbox.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 2 Max
Owners' most consistent complaint about the DELTA 2 Max is fan noise under real conditions — loud enough during heavy loads or charging that a Quiet Charging mode exists specifically to trade charge speed for less fan noiseA1. Giving it a few inches of clearance for airflow is the usual workaround owners mention.
On the battery itself, the reports are cleaner: fast wall charging that reaches a high state of charge in well under two hoursA2, and no reported structural degradation after six months of real use on its LiFePO4 cellsA3. Reviewers call it still worth buying with caveats — capable and ecosystem-compatible, just not the newest generation on the shelfA4.
“Fast AC wall charging — 0 to 80% in about 50 minutes and a full charge in roughly 80 minutes.”
Sources
powerstationadvisor.com · pcworld.com · thesolarlab.com · protoolsadvisor.com · trailandkale.com
BLUETTI AC240P
The AC240P is the higher-capacity build of BLUETTI's AC240 platform — 1,843Wh against the standard AC240's smaller pack, with distinctive orange IP65 branding that marks it as the rugged-line unit on a shelfB3. It sits at the premium end of BLUETTI's own catalog, with fast charging and room to expand into a much larger bankB4.
The IP65 claim is real but conditional — it only holds with every port cover closed, so a cable left plugged in during rain compromises the seal it's known forB1. Testers who did close everything up reported it surviving a sustained rainstorm and saltwater spray without any interior moistureB2.
“IP65 water- and dust-resistant, but the protection applies only when all port covers are closed; using it with cables plugged in compromises the rating, and it shouldn't be used in the rain that way.”
Sources
storagereview.com · backuppowerhub.com · makeuseof.com · techradar.com · fstoppers.com · bluettipower.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
- Solid LFP durability, fast charging, and ecosystem/expandability are the praise; loud fans under heavy load or charging are the recurring complaint. [DELTA 2 Max · 3 entries]
- IP65 ruggedness proven in rain and saltwater, big expandability, and fast charging are the praise; the caveat is that water resistance only holds with port covers closed. [AC240P · 3 entries]
- A1
“Fan noise is a significant issue — cooling fans can get loud, around 52 dB during heavy loads or charging; a Quiet Charging mode reduces noise but extends charge time, and giving it 6 inches of clearance helps airflow.”
powerstationadvisor.com / pcworld.com — DELTA 2 Max review · 2025-2026 · [negative]
- A2
“Fast AC wall charging — 0 to 80% in about 50 minutes and a full charge in roughly 80 minutes.”
thesolarlab.com / protoolsadvisor.com — DELTA 2 Max review · 2025-2026 · [positive]
- A3
“LiFePO4 chemistry rated for 3,000+ cycles to 80% with superior thermal stability; after 6 months of real use there was no structural degradation and it felt as solid as day one.”
powerstationadvisor.com / trailandkale.com — DELTA 2 Max review · 2025-2026 · [positive]
- A4
“Reviewers say it's still worth buying but with caveats — a versatile unit with expandability and ecosystem compatibility.”
thesolarlab.com / powerstationadvisor.com — DELTA 2 Max review · 2025-2026 · [mixed]
- B1
“IP65 water- and dust-resistant, but the protection applies only when all port covers are closed; using it with cables plugged in compromises the rating, and it shouldn't be used in the rain that way.”
storagereview.com / backuppowerhub.com — BLUETTI AC240/AC240P review · 2026 · [mixed]
- B2
“Real-world weatherproofing held up — left outside in a 6-hour rainstorm, water beaded off and the interior stayed bone dry; used on a sailboat with constant saltwater spray, no moisture intrusion after wiping down the exterior.”
makeuseof.com / techradar.com — AC240/AC240P review · 2026 · [positive]
- B3
“The 1,843Wh AC240P is the higher-capacity option, adding 307Wh over the standard AC240, with distinctive orange IP65 branding; a solid choice if you need the extra capacity and prefer the more visible design.”
techradar.com / fstoppers.com — AC240P review · 2026 · [positive]
- B4
“Premium end of BLUETTI's lineup; LFP battery, a fast charge reaching most of full quickly, and expandable to a very large multi-kWh bank.”
bluettipower.com / techradar.com — AC240P specifications · 2026 · [positive]
Research compiled July 14, 2026.
Who Should Buy Which
Buy the DELTA 2 Max if you…
- →You want the cheaper, lighter, higher-capacity unit and you're not leaving it exposed to weather — $1,297 against $1,939, 205Wh more, 21.3 lbs less.
- →You need real surge headroom for a fridge or AC compressor startup: 4,800W against the AC240P's 3,600W.
Buy the AC240P if you…
- →You need a unit that's actually rated and tested for rain, dust, or saltwater exposure — the DELTA 2 Max has no IP rating at all.
- →You want the faster, unconditional UPS switchover for sensitive gear: 15ms against 20ms.
If neither fits
If you need a full two-night camping trip (about 2,100Wh) or daily van-life power (about 4,685Wh), both units fall short — 121% to 299% of what's required. Look at a bigger-capacity unit from either brand instead.
The Bottom Line
This one comes down to environment. The DELTA 2 Max is cheaper, lighter, holds more capacity, and gives a starting compressor twice its rated output in surge headroom — the AC240P doesn't out-argue that on price or power.
Take the DELTA 2 Max unless this unit is genuinely going to sit somewhere wet, dusty, or salty, in which case the AC240P's tested IP65 shell is the one thing on this page actually worth the extra $642. Just don't buy the DELTA 2 Max expecting silence at full tilt — the 30dB number holds at idle, not under load.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
EcoFlow DELTA 2 Max vs BLUETTI AC240P — which should I buy?
The DELTA 2 Max for most buyers: it's $1,297 against the AC240P's $1,939, holds 205Wh more, and is 21.3 lbs lighter. Take the AC240P only if the unit needs to survive real weather exposure, since its IP65 shell is the one thing the DELTA 2 Max genuinely can't match.
Is the DELTA 2 Max really quieter than the AC240P?
At light load, yes — 30dB against the AC240P's 45dB. But owners report the DELTA 2 Max's fans climb noticeably once you're charging it or running a real load, which narrows a gap that looks huge on paper. Treat the 30dB spec as a best case, not a guarantee.
Which one has better surge power for starting a fridge?
The DELTA 2 Max. It surges to 4,800W against a 2,400W rated output — twice the headroom — while the AC240P surges to 3,600W, one and a half times its own rating. That extra margin matters for compressor startup spikes.
Is the AC240P worth the extra $642?
Only if you need its IP65-rated shell. It carries a sealed, gasketed case tested to survive rain and saltwater with the port covers closed, plus 500 more rated cycles and a faster UPS switchover. If the unit will live indoors, the DELTA 2 Max is the better value on every other measure.
Which is cheaper to own over time?
The DELTA 2 Max, at $0.21 per lifetime kWh against the AC240P's $0.30. The AC240P's extra cycle life and warranty year are real, but it's spreading a higher price over a smaller, 1,843Wh battery, so it stays the more expensive unit to run.
Where to buy
EcoFlow DELTA 2 MaxPick
$949.00
$949.00 list · direct from EcoFlow
BLUETTI AC240P
$1,461.99
$1,461.99 list · direct from BLUETTI
Prices may vary by retailer and are subject to change.