Head-to-head test
EcoFlow DELTA 3 Max vs BLUETTI AC240P
$0.10 per lifetime kWh against $0.30 — the DELTA 3 Max costs a third as much to own as the AC240P, for more capacity and 21.3 fewer pounds, which leaves the AC240P's IP65 shell as the only thing left to sell.
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
AC240P
3,528Power Score · Appliance Class
$1,461.99 list · direct from BLUETTI
Spec deltas
The DELTA 3 Max costs $799 to the AC240P's $1,939 — $1,140 less — and still holds more capacity, 2,048Wh against 1,843Wh. That's a third of the price for more storage, and it's the headline of this whole comparison.
The AC240P answers back with one real card: an IP65 shell reviewers tested through a 6-hour rainstorm and constant saltwater spray with the interior staying dry. The DELTA 3 Max carries no such rating, but it does carry its own durability record — surviving truck-bed transport, a 105°F garage, and near-freezing operation without capacity loss.
So this isn't really close on price, weight, or noise. It comes down to one question: does this unit need to sit outside in actual weather? If yes, the AC240P earns its premium. If no, the DELTA 3 Max wins going away.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
rated cycles
At $1,140 less and 500 more lifetime cycles, the DELTA 3 Max's cost per lifetime kWh comes out to a third of the AC240P's — $0.10 against $0.30 — while holding more capacity from the start.
DELTA 3 Max $799 vs AC240P $1,939DELTA 3 Max $0.10 cost per lifetime kWh vs AC240P $0.30DELTA 3 Max 4,000 cycles vs AC240P 3,500 cycles
Why it mattersThe AC240P has to justify $1,140 with something the spec sheet alone doesn't show, because it's losing the ownership math by three-to-one.
The AC240P's rainstorm-and-saltwater testB2 is a genuine advantage for outdoor exposure, but it lapses the moment a cable is plugged in during rainB1. The DELTA 3 Max's toughness is a different kind — surviving heat, cold, and rough transportA3 — real durability, just not weatherproofing.
AC240P IP65-rated, tested through a 6-hour rainstorm and constant saltwater spray with no water intrusionB2AC240P's seal only holds with every port cover closedB1DELTA 3 Max survived truck-bed transport, a ~105°F garage, and near-freezing operation without capacity lossA3
Why it mattersIf this is sitting outside uncovered in the rain, only the AC240P is rated for it. If it's living in a garage, truck bed, or van, the DELTA 3 Max's proven toughness covers that job for a third of the price.
weight
50.7 lbs against 72 is 21.3 fewer pounds to carry — close to a third less — and 30dB against 45dB is enough of a gap that reviewers describe the DELTA 3 Max as essentially silent at conversational distance under moderate loadA1, while the AC240P is loud enough to notice.
DELTA 3 Max 30dB noise vs AC240P 45dBDELTA 3 Max weighs 50.7 lbs vs AC240P's 72 lbsDELTA 3 Max reviewers call it whisper-quiet at conversational distance under moderate loadA1
Why it mattersFor anyone carrying this solo or running it near where they sleep or work, the weight and noise gap is felt every single time, not just on the spec sheet.
Both output 2,400W continuously, but the DELTA 3 Max's 4,800W surge is a full 1,200W more than the AC240P's 3,600W — a wider cushion for starting a fridge or AC compressor. The AC240P's one non-weatherproofing edge is its sixth warranty year, which at $323 a year of coverage costs more than the DELTA 3 Max's $160.
DELTA 3 Max surge 4,800W vs AC240P surge 3,600WBoth run 2,400W continuous outputAC240P carries a 6-year warranty vs the DELTA 3 Max's 5-year
Why it mattersEven the AC240P's secondary selling points don't clearly win: the surge margin favors the cheaper unit, and its extra warranty year costs twice as much per year to hold.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: $0.10 vs $0.30 per lifetime kWh — a three-to-one gap that anchors the whole page.
cost / lifetime kWh
This isn't a close value comparison. The DELTA 3 Max's $799 against the AC240P's $1,939 is $1,140 saved before ownership costs even enter the picture, and because it also holds a 500-cycle edge (4,000 vs 3,500), its cost per lifetime kWh lands at $0.10 against the AC240P's $0.30 — three times cheaper for more stored capacity.
Warranty-adjusted, the AC240P still loses: $323 a year of coverage against the DELTA 3 Max's $160, even with an extra warranty year included. There's no value lens here where the AC240P comes out ahead — its entire case rests on the one thing this section doesn't measure.
What the Specs Don't Tell You
Selected because: Surge, weight, noise, and warranty all fire, and most favor the DELTA 3 Max.
rated cycles
Most of what fires here favors the DELTA 3 Max: it surges to 4,800W against the AC240P's 3,600W, runs at 30dB against 45dB, and weighs 21.3 lbs less. That's a meaningfully easier unit to start a fridge on, run near people, and carry.
The AC240P's one flagged advantage is warranty length — a sixth year the DELTA 3 Max doesn't offer — but as shown above, that year costs more per year to hold, not less. What doesn't show up as a gotcha at all, because the engine doesn't score it, is the AC240P's IP65 rating, which is this comparison's real deciding factor for the right buyer.
Portability & Form Factor
Selected because: 21.3 lbs is a real everyday difference worth confirming on its own.
weight
At 50.7 lbs, the DELTA 3 Max is 21.3 lbs lighter than the AC240P's 72 — roughly the weight of a full case of water. That's the difference between a unit you can lift into a trunk solo and one that starts pushing toward a two-person job.
It compounds with noise: 30dB against 45dB means the lighter unit is also the quieter one, so there's no tradeoff to make here. The AC240P doesn't reclaim any ground on portability — its case is built entirely around what happens when this unit is sitting still, outside, in weather.
Brand Trust
Selected because: Largest ecosystem in the category against BLUETTI's value-focused lineup.
EcoFlow runs the largest community and ecosystem in the category — Reddit's r/Ecoflow_community alone dwarfs BLUETTI's, and its app rates 4.6 on iOS against BLUETTI's 4.5, a close but real edge. EcoFlow's X-Stream fast-charging tech and its DELTA Pro Ultra X modular expansion (up to 180kWh) show a faster innovation pace than BLUETTI's lineup.
BLUETTI counters with the stronger value story across its own catalog — the best capacity-to-price ratio in the market — even though that specific advantage doesn't hold in this particular matchup. Support on both sides is a mixed bag: EcoFlow's Oct 2025 DELTA Max 2000 recall is worth knowing about, while BLUETTI's support is more consistently inconsistent, with China-timezone delays. Buying either through a major retailer for return protection is the safer move regardless of brand.
Strengths & trade-offs
EcoFlow DELTA 3 Max
Strengths
- +Costs $613 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 (+$613) than the DELTA 3 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 3 Max
The AC240P runs out of juice. It only has 1,567Wh usable, but this scenario needs 1,645Wh. The DELTA 3 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 3 Max runs 8.5h vs 7.6h.
$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
The DELTA 3 Max beats the AC240P on nearly every number: $1,140 cheaper ($799 vs $1,939), more capacity (2,048Wh vs 1,843Wh), 21.3 lbs lighter, 15dB quieter, and a third of the cost per lifetime kWh ($0.10 vs $0.30). The AC240P answers with exactly one structural advantage — a field-tested IP65 shell proven through a rainstorm and saltwater spray — plus a sixth year of warranty. Unless this unit is living somewhere genuinely exposed to rain or salt spray, the DELTA 3 Max does the same job for a third of the lifetime cost.
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 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 3 Max rates 4.4/5 (63rd 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.
AC240P: 45dB Under Load
45dB is about as loud as a running refrigerator. If you're running a CPAP or sleeping near this unit, the fan noise may be noticeable. Most people find anything above 45dB disruptive for sleep.
Surge Power: Inverter Quality Indicator
The DELTA 3 Max has a 2× surge-to-continuous ratio vs the AC240P's 1.5×. A higher ratio (≥2×) means the inverter handles motor startup surges better. That's critical for fridges, AC compressors, and power tools that briefly draw 2-3× their rated wattage. The AC240P may trip when starting these appliances even though its continuous wattage looks sufficient.
UPS Speed: line-interactive (<10ms) vs standby (<20ms)
The DELTA 3 Max switches to battery in 10ms (line-interactive (<10ms)), while the AC240P takes 15ms (standby (<20ms)). Safe for desktop PCs, routers, and CPAP machines. NAS drives are protected. This matters if you're using it as a home UPS for always-on equipment.
Warranty Value Comparison
The DELTA 3 Max gives you 5.9 years of warranty per $1,000 spent, vs the AC240P's 4.1 years. That's 1.4× 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 3 Max.
Check DELTA 3 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 3 Max wins on both sticker price and long-term value. At $0.1/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner.
Delivers each lifetime kWh for $0.13 less — check the DELTA 3 Max price →
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
The largest community and fastest-charging technology in the category, backed by the deepest product ecosystem of any brand here.
Worth knowing
The Oct 2025 DELTA Max 2000 recall over overheating risk is worth knowing about before buying into the ecosystem, even though it doesn't involve this specific unit.
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
The best capacity-to-price ratio across BLUETTI's own lineup, even though that specific edge doesn't carry into this particular matchup.
Worth knowing
Support quality varies by contact channel; buying direct from BLUETTI's site tends to produce smoother outcomes than third-party purchase claims.
Analyst note
EcoFlow has the bigger community, the faster charging tech, and the more active innovation cadence. BLUETTI's advantage in this specific pairing isn't ecosystem — it's the AC240P's individual IP65 rating, a product-level strength rather than a brand-wide one.
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.
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 3 Max
Reviewers describe the DELTA 3 Max as whisper-quiet at conversational distance under moderate load, with an app-based quiet mode and custom charge-speed limit for when heavier loads spin the fans upA1. The app itself is one of the main reasons people move to the EcoFlow ecosystem, offering deep control well beyond the on-device screenA2.
It held up in hands-on durability testing, too: capacity stayed consistent between one- and three-month checks, and it survived truck-bed transport, a roughly 105°F garage, and near-freezing operation without issueA3. One reviewer rated it 8.5 out of 10, calling its mix of fast recharge and LFP longevity one of the best value propositions in its classA4.
“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 AC240P
The AC240P is the higher-capacity variant of BLUETTI's rugged AC240 platform, adding 307Wh over the standard model with distinctive orange IP65 brandingB3, and reviewers call it the premium end of BLUETTI's lineup: LFP chemistry, a fast charge, and room to expand into a genuinely large multi-kWh bankB4.
Its IP65 rating is the real story — left outside through a 6-hour rainstorm, water beaded off with the interior staying bone dry, and on a sailboat under constant saltwater spray it showed no moisture intrusion after a wipe-downB2. The one catch: that seal only holds with every port cover closed, so using it in the rain with cables plugged in compromises the ratingB1.
“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
- Reviewers consistently praise practical quietness (with app-based quiet/charge-limit modes) and the EcoFlow app/ecosystem as differentiators. [DELTA 3 Max · 2 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
“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]
- 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 3 Max if you…
- →You want the better deal, full stop — $1,140 less, more capacity, and a third of the cost per lifetime kWh.
- →Weight and noise matter for daily use — 21.3 lbs lighter and 15dB quieter than the AC240P.
- →You're running loads that could surge — 4,800W of headroom against the AC240P's 3,600W.
Buy the AC240P if you…
- →This unit will actually sit outside in real weather — the AC240P's IP65 rating is tested for rainstorms and saltwater sprayB2.
- →You want the longest warranty term here — a sixth year the DELTA 3 Max doesn't offer.
- →You're already committed to BLUETTI's expansion ecosystem and want to stay within it.
If neither fits
Both fall short of a full weekend of camping (2,100Wh) on their own — 121% for the DELTA 3 Max, 134% for the AC240P — and further short on a van-life day at 269-299%. For loads that size, both need expansion batteries or solar input; base capacity alone doesn't settle it.
The Bottom Line
The DELTA 3 Max wins on nearly every number: $1,140 less, more capacity, 21.3 lbs lighter, 15dB quieter, and a third of the cost per lifetime kWh. For the large majority of buyers, that's not a close call.
The AC240P's entire case is its field-tested IP65 shell, proven through a rainstorm and saltwater sprayB2, plus a sixth warranty year. If this unit genuinely needs to live outside in weather, that's worth paying for. If not, the DELTA 3 Max does the same job for a third of the lifetime cost.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
EcoFlow DELTA 3 Max or BLUETTI AC240P — which should I buy?
For most buyers, the DELTA 3 Max: it's $1,140 cheaper, holds more capacity (2,048Wh vs 1,843Wh), is 21.3 lbs lighter, and costs a third as much per lifetime kWh ($0.10 vs $0.30). Buy the AC240P instead only if this unit needs to sit outside in real rain or saltwater exposure — its IP65 rating is field-tested for that, and the DELTA 3 Max carries no such rating.
Is the AC240P's weatherproofing worth $1,140 more?
Only if you'll use it. Reviewers verified the AC240P's IP65 seal through a 6-hour rainstorm and constant saltwater spray with no water intrusion, but that rating lapses the moment a cable is plugged in during rain. If this unit is living in a garage, van, or indoors, you're paying a large premium for protection you won't need.
Has the DELTA 3 Max been tested for durability, even without an IP rating?
Yes — hands-on testing found its capacity held steady between one- and three-month checks, and it survived truck-bed transport, a roughly 105°F garage, and near-freezing operation without issue. That's real toughness against heat, cold, and rough handling; it just isn't a rain or saltwater rating.
Which one is quieter and easier to carry?
The DELTA 3 Max on both counts — 30dB against the AC240P's 45dB under load, and 50.7 lbs against 72, a 21.3-lb gap. Reviewers describe it as whisper-quiet at conversational distance under moderate load.
Which one has better surge power for a fridge or AC unit?
The DELTA 3 Max, with a 4,800W surge against the AC240P's 3,600W — 1,200W more headroom for a compressor startup, even though both run 2,400W continuous. It's a real edge for exactly the kind of appliance that trips an underpowered inverter.
Where to buy
EcoFlow DELTA 3 MaxPick
$849.00
$849.00 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.