Head-to-head test
EcoFlow DELTA 3 Classic vs BLUETTI AC240P
Everything here comes down to one line on your load list: under about 870 usable watt-hours a day the DELTA 3 Classic does the same job for a third of the money, and over it the AC240P is the only one of the two that finishes the night.
Full profiles: EcoFlow DELTA 3 Classic → · BLUETTI AC240P →
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
$559.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
$1,461.99 · direct from BLUETTI
Last checked 1 day ago. Prices move — check before you buy.
Spec deltas
The AC240P asks about three times the price of the DELTA 3 Classic for a little under twice the battery: 1,843Wh at $1,462 against 1,024Wh at $469. Whether that reads as a bargain or as waste depends on one number you already know, which is how many watt-hours your actual evening pulls.
Neither of these is a bad box, and that's worth saying before the page starts arguing. Both are LFP packs rated for at least 3,000 cycles, both peak at 3,600W, and both store electricity for under a quarter a kilowatt-hour across their rated lives. This isn't good against bad. It's right-sized against oversized, and the expensive mistake here is buying headroom you never draw.
So here's the line. If your daily list clears roughly 870 usable watt-hours, the DELTA 3 Classic stops being enough and nothing about its price fixes that. If it doesn't clear 870, the AC240P is 45 pounds heavier and nearly a thousand dollars dearer as insurance against a need you don't have.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Capacity
And those expensive watt-hours don't change a verdict from no to yes on either scenario people actually shop for. They move the camping weekend from 41% covered to 75% and the blackout from about half to within a rounding error, which is worth real money if the blackout is your reason and nothing at all if it isn't. The AC240P is not a better version of the DELTA 3 Classic. It's a bigger one, priced like a bigger one and then some.
DELTA 3 Classic: $469 for 1,024Wh, which the site's flat 85% allowance puts at 870Wh usableAC240P: $1,462 for 1,843Wh, or 1,567Wh usable on the same allowanceThe 2,100Wh camping weekend and the 1,645Wh blackout both defeat the AC240P as well, by 533Wh and 78Wh
Why it mattersIf your outage list lands under 870 watt-hours, the extra money buys reserve you will never touch, so spend it on panels or a second small unit instead.
solar input
The DELTA 3 Classic's fast-charge story is the wall, not the sun: reviewer testing put it at empty to full in just shy of 55 minutes from a standard outletA1. That is the most useful spec it has right up until the grid goes down, at which point the only input that matters is the one on the roof. Storm Guard's pre-storm auto top-up covers the outage you can see comingA12. Nothing covers day two except panel ceiling.
AC240P: 1,200W solar input into an 1,843Wh pack, so about an hour and a half of strong sun from empty (1,843 divided by 1,200)DELTA 3 Classic: 500W solar input into a 1,024Wh pack, so about two hours (1,024 divided by 500)Reviewers flag the 500W cap as low for a 2026 release, one noting the screen simply showed 500W and stopped thereA5A9
Why it mattersBuy the AC240P if your worry is a multi-day outage; buy the DELTA 3 Classic if your worry is a storm you'll get a warning about.
weight
The rating comes with its own punchline, which is that IP65 applies with the covers shut, and shut is not the state the box is in while it's powering anythingB1. So the weatherproofing protects it where it sits between jobs rather than licensing you to run cables through a downpour. That still leaves it the only one of these two with any ingress rating on the record, and for a boat deck or a job-site trailer that single fact outranks the whole price argument.
DELTA 3 Classic: 26.7 lbs. AC240P: 72 lbsThe AC240P's port list includes a 30A RV outlet; the DELTA 3 Classic's record shows noneReviewers left the AC240P out through a six-hour rainstorm and ran it on a sailboat in saltwater spray with no water intrusionB2, but its IP65 rating only holds with every port cover closedB1
Why it mattersIf the unit's permanent home is outdoors or bolted into a rig, take the AC240P and skip the rest of this page; if it lives indoors and travels, you're paying for a shell you'll never test.
continuous output
The DELTA 3 Classic's showier 2x surge-to-continuous ratio is the same ceiling divided by a smaller number, not extra muscle, and nothing in these six profiles asks for more than 400W at the moment of startup anyway. The AC240P's extra continuous watts only show up when two big resistive loads run at once, a kettle alongside a microwave rather than a fridge alongside lights.
Both units list the same 3,600W surge ceilingContinuous output: 1,800W for the DELTA 3 Classic, 2,400W for the AC240PThe heaviest startup demand in any of the six load profiles is 400W, at the tailgate
Why it mattersIf a hard-starting compressor is what sent you shopping for the bigger inverter, it isn't a reason, and you should be arguing about watt-hours instead.
The specific dimensions that decide these two units — everything else is a tie.
Your Life, Your Pick
Selected because: The load profiles are where the capacity gap turns into a yes or a no: the DELTA 3 Classic covers two of the six outright, the AC240P three, and three defeat both.
Three of the six profiles defeat both units. A 2,100Wh camping weekend, a 1,645Wh evening blackout and a 4,685Wh van day are all past a single 1,024Wh box, and all three are past an 1,843Wh one too, though the blackout misses by a margin you can close by turning something off. If your list looks like the van day, the AC240P isn't the upgrade. It's the smaller half of a much bigger purchase.
Where the two actually separate is the middle of the range, and the remote workday shows the exact shape of it. That profile wants 910Wh; the DELTA 3 Classic's nameplate covers it and its derated usable figure doesn't, so the honest answer is yes if you trim 40 watt-hours rather than a clean no. The tailgate at 670Wh, both clear with room. One scenario in six genuinely hinges on the capacity gap, and it hinges by 40 watt-hours.
Portability & Form Factor
Selected because: 26.7 lbs against 72 is the one difference that never stops being true, and it decides whether the unit travels or just lives where you put it.
weight
Forty-five pounds separates these two (72 against 26.7), and weight is the spec that never gets better with firmware. 26.7 lbs is a one-hand carry out of a trunk and up a flight of basement stairs. 72 lbs is a two-hands, bent-knees lift you plan around, and after the second time you'll stop moving it at all. That isn't a knock on the AC240P so much as a description of what kind of machine it is.
Which is why the tailgate row is the one to read sideways. The AC240P takes it on reserve, and reserve is precisely the thing nobody feels at a tailgate. What you feel is the walk from the car.
Lifetime Value
Selected because: 15 cents a lifetime kilowatt-hour against 23: neither is expensive energy, which is exactly why the $469 against $1,462 purchase price does the deciding.
cost / lifetime kWh
Fifteen cents a lifetime kilowatt-hour against twenty-three. Both are cheap, cheap enough that neither unit is a bad way to store electricity and cheap enough that the lifetime math neither rescues the AC240P's price nor condemns it. It does bank roughly twice the total energy over its rated life, 6,451 kWh against 3,072, because it's a bigger pack rated for at least 3,500 cycles against 3,000.
Amortised across weekend use, ownership costs about 4 cents a day for the DELTA 3 Classic and 12 for the AC240P, and both of those are noise next to the cost of a dinner. When the per-kilowatt-hour figures sit this close together, purchase price isn't a tiebreak. It's the decision.
What the Specs Don't Tell You
Selected because: The caveats that could reverse this call sit here: an identical 3,600W surge ceiling, UPS figures that are rating classes rather than measurements, and the year-six warranty question.
rated cycles
Two of the cards below matter and the rest are reassurance. The surge ceilings are identical, so if you came here because something was tripping an inverter, the AC240P's bigger continuous rating isn't buying what you think it is. The UPS figures are rated at no worse than 10ms and no worse than 15ms, which are rating classes rather than stopwatch results, so read both as a desktop will probably ride through and neither as a promise about the machine on your desk.
The noise pair is the trap. Thirty against forty-five looks like a fifteen-point gap and is really two makers describing their own units by their own methods, at loads neither one publishes. If this box is going next to a bed, that comparison can't decide it for you, and the size of the box probably can.
Brand Trust
Selected because: At $1,462 BLUETTI's support policy stops being trivia, and buying direct is the channel that improves both the warranty term and the odds on a claim.
BLUETTI's support is the most inconsistent in the category, and this is the price point where that stops being trivia. It's email-first with China-timezone delays, and outcomes range from smooth to weeks of troubleshooting or an offer of a discount on a replacement instead of a repair. Buying direct from BLUETTI's own site is the version with the fewest bad endings, and it's also where the longest warranty term lives, so on this unit the two reasons to buy direct stack into one.
EcoFlow's weakness is different rather than smaller: US phone support you can actually reach, polarised results once you do, and no parts or service at all after the warranty ends, which makes year six a replacement rather than a repair. Both companies ship well-rated apps and have real communities behind them. Neither service record should pick this for you, but if you're buying the AC240P, buy it from BLUETTI directly.
Strengths & trade-offs
EcoFlow DELTA 3 Classic
Strengths
- +Costs $993 less
- +Lighter by 45.3 lb
Trade-offs
- –Weaker inverter (-600W) limits appliance compatibility.
- –Sealed capacity — the AC240P can add batteries to grow past 1,024Wh; this one can't.
BLUETTI AC240P
Strengths
- +Larger battery capacity
- +Higher AC output
- +Longer warranty
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$993) than the DELTA 3 Classic.
- –Significantly heavier (+45.3 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 covers this scenario's 2,100Wh: the DELTA 3 Classic comes up 1,230Wh short (about 41% covered), the AC240P 533Wh (75%). Treat this as partial cover — enough for the essentials in it, not the whole list.
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 box finishes a 1,645Wh evening, and that's the honest headline. The AC240P stops 78Wh short, close enough that skipping one appliance or going to bed early gets you there on the night; the DELTA 3 Classic is 775Wh short, which is most of a second unit. If this profile is your reason for shopping, that difference is the only thing on this page worth the extra money.
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
DELTA 3 Classic
The DELTA 3 Classic takes this row, and capacity has nothing to do with why. A CPAP's 320Wh overnight leaves 550Wh spare in the DELTA 3 Classic and 1,247Wh spare in the AC240P, and reserve you never touch isn't a feature. What's next to your pillow is: a box you can lift onto a nightstand one-handed, or one that stays on the floor where you set it. Both list a UPS mode, so if it's plugged in at home either will ride through the flicker.
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
AC240P
The AC240P takes this one and the DELTA 3 Classic loses it by 40Wh, not of battery but of arithmetic. The day wants 910Wh; the DELTA 3 Classic's 1,024Wh nameplate clears that and its 870Wh derated figure doesn't, because every unit on this site is charged a flat 15% for conversion loss rather than measured. Read it as: it'll probably do your day, with no room for a space heater. The AC240P finishes with 657Wh untouched.
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
AC240P
The AC240P wins this row and it's the wrong row to win. Both units cover a 670Wh afternoon comfortably, the AC240P using 43% of its usable capacity against the DELTA 3 Classic's 77%, and nobody at a tailgate has ever felt a percentage of reserve. What you feel is the carry from the car, and that's 45 pounds in the DELTA 3 Classic's favour. Take the headroom only if the setup is still running well after dark.
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 covers this scenario's 4,685Wh: the DELTA 3 Classic comes up 3,815Wh short (about 19% covered), the AC240P 3,118Wh (33%). This is well outside what either unit is for; the right answer here is a larger station, not a choice between these two.
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 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: AC240P runs 7.6h vs 4.2h.
$1,461.99 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 0–104.4hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–20.9hHigh-Draw Appliances
These reveal the real limitsscale 0–1.6h¹ 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
September 13, 2026
Verdict: the EcoFlow DELTA 3 Classic
Take the DELTA 3 Classic. It covers two of the six load profiles on this page outright and misses a third by 40Wh, a gap its nameplate capacity actually clears and one you close by unplugging a single thing. The AC240P's premium buys real capacity, but on the two jobs people actually buy these boxes for, a camping weekend and a full-evening blackout, it doesn't finish either. It fails by less. Where it earns the money is narrow and genuine: on the 1,645Wh blackout it lands within 78Wh while the DELTA 3 Classic is short by 775Wh, nearly ten times as much; if the outage runs into a second day its 1,200W solar ceiling is what brings a battery back; and if the unit is going to live outdoors, only one of these two has a sealed shell rated for it. Buy it for those three reasons. Don't buy it for more starting power, because both units peak at the same 3,600W.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of September 13, 2026. The links below open EcoFlow's and BLUETTI's current prices.
$559.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
or check the AC240P price$1,461.99 list
Written by Ian Schneider, Solar & Off-Grid Tester · Station Arena Test Desk · Updated September 13, 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, 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 Classic rates 4.5/5 (73rd percentile of 27 Everyday-class units), and AC240P rates 3.9/5 (35th percentile of 27 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, And Where It Ends Up
72 lbs is a two-hands, bent-knees lift, the kind of thing you put down once and then leave. The DELTA 3 Classic's 26.7 lbs goes up the basement stairs in one trip. If this unit is going to move more than a few times a year, that gap outranks the battery inside it.
Noise: Two Ratings, Two Rulers
The DELTA 3 Classic is published at 30dB and the AC240P at 45dB, but these are two makers rating their own units by their own methods. Most published figures in this category are best-case floors taken at a load the maker chose, and nobody publishes what a 40W draw at 2 a.m. sounds like. The difference you can subtract is not a difference you can count on hearing, so if quiet matters, look for hands-on reports rather than these two numbers.
DELTA 3 Classic: 1,024Wh Is The Ceiling
What you buy is what you'll always have. The DELTA 3 Classic is sealed at 1,024Wh, and outgrowing it means buying a second unit rather than a battery. The AC240P does take expansion batteries, but that's the step after the thing that actually separates them, which is its 1,843Wh base pack before anything is added. If you know your needs are climbing, this is the one honest reason on the page to spend the extra money.
Surge Power: Same Ceiling, Different Ratio
Both units surge to the same 3,600W. The DELTA 3 Classic shows a higher surge-to-continuous ratio (2× vs 1.5×) only because its continuous rating is lower — the ratio is the same ceiling divided by a smaller number, not extra starting ability. On what either can actually start, they are identical; the difference is what they can hold afterwards.
UPS Switchover: ≤10ms vs ≤15ms
Both list a UPS mode, at different rated speeds. The DELTA 3 Classic is rated ≤10ms — quick enough on paper that desktop PCs and routers should ride through, treating that as the rating it is. The AC240P is rated ≤15ms — fine on paper for routers and most electronics; the fussiest PC power supplies sit right at this line. If a computer with unsaved work is the thing being protected, the stated class is worth the attention; nothing here is a lab result.
Warranty: Six Years, With Conditions
The AC240P's record carries up to 6 years against the DELTA 3 Classic's 5, and BLUETTI's longest terms depend on registering the unit or buying direct rather than through a reseller, so the number isn't automatic. The cheaper box buys more cover per dollar, $94 per warranty year against $244, but that's a statement about price rather than coverage. If something fails in year six, only one of these is still somebody else's problem.
Full record above — the Test Desk pick is the DELTA 3 Classic.
Check DELTA 3 Classic 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 Classic 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
The deepest catalogue in portable power, 12 to 15 models across DELTA Pro, DELTA 3 and RIVER 3, plus panels and smart home panels. If you end up owning three EcoFlow things, they all speak the same app.
Support
US phone, email and chat, and the experience splits hard: prepaid replacement labels and quick turnarounds for some, long waits and a refurbished unit against a new claim for others. Buying through Costco or Amazon gives you a return window that doesn't depend on how that call goes.
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
Fast charging is the real differentiator, and on this unit it's the headline spec rather than the battery. The deep ecosystem also means the accessory you want probably exists.
Worth knowing
EcoFlow tested subscription paywalls for advanced app features in early 2025 and paused the plan after community backlash. There's also no parts or service offered out of warranty, so a failure after year five is a replacement, not a repair.
BLUETTI
Ecosystem
One of the broadest lineups going, 15 to 20-plus models from the budget AC2A up to the Apex 300, including sodium-ion cold-weather units and vehicle solar hubs. The AC240P's expansion batteries come off that same shelf.
Support
The most inconsistent support in the category, heavily email-based with China-timezone delays. Some claims go smoothly; others turn into weeks of troubleshooting, a confusing third-party purchase process, or a discount on a new unit offered instead of a repair. Buying direct from BLUETTI's site is the version with the fewest bad endings.
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
Capacity per dollar is BLUETTI's whole argument, and several Elite and Apex units are the cheapest watt-hours in our catalogue. The AC240P isn't one of them: here you're paying for the rugged shell and the expansion port, not for cheap capacity.
Worth knowing
Support inconsistency is the risk to price in, and some older BLUETTI units have no spare-parts path at all. Rated cycle life also varies within a family rather than tracking it, so check the specific model rather than trusting the range name.
Analyst note
Two big catalogues with opposite failure modes. EcoFlow's support is polarised but domestic and reachable by phone, and it stops entirely at the end of the warranty. BLUETTI's is email-first and the least consistent in the category, but buying direct improves both the odds and the warranty term. Both apps are well rated, so that's a wash. The practical upshot: this matters more on the pricier unit, which is also the one where buying direct is clearly the right channel.
Growth path
DELTA 3 Classic
FIXED CAPACITYFixed at 1,024Wh, 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.
Generous port selection supports complex multi-device setups.
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
The DELTA 3 Classic is sealed at 1,024Wh, which is fine if that covers you. The AC240P starts at 1,843Wh and can grow beyond it with BLUETTI expansion batteries — though at this size expansion means longer runtimes on the same loads, not a path to home backup. More hours, not more house.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3 Classic
Field data on the DELTA 3 Classic is thin by definition. It launched in March 2026, and what exists is hands-on reviewer testing rather than anyone's second winter with itA0. The most useful measured numbers are that wall charge from empty to full in just shy of 55 minutesA1 and an idle draw of roughly 17WA2, which is the figure to keep if the plan is to leave it on standby as a blackout box. Reviewers went in expecting a unit at this price to be loud and reported it wasn'tA2A3, the port layout puts outlets on the front and inputs on the back where they belongA4, and the app and its Storm Guard auto-charge draw consistent praiseA6A12.
Two cautions from the same testing. More than one outlet calls the 500W solar cap low for a 2026 release, with one reviewer noting the screen simply displayed 500W input and stayed thereA5A9; and one tester started a small window AC on the 1,800W inverter without trouble but found the runtime shortA10, which is the capacity talking rather than the inverter. Worth knowing too that the retailer review page for this model blends in comments that appear to describe a DELTA 2, including a buyer who received something other than what they ordered, so we've kept that material out of the spec picture instead of treating it as evidenceA0A15.
“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 AC240P
The AC240P's ledger is thinner still, and it's reviewer material rather than long-term ownershipB0. What it establishes is that the ruggedness is real: left outside through a six-hour rainstorm with water beading off and the interior dry, then used on a sailboat in constant saltwater spray with no moisture intrusion after a wipe-downB2. The catch arrives in the same breath, since IP65 holds only with every port cover closed, which means running cables out of it in the rain is outside what the rating coversB1.
Beyond the shell, the notes mostly confirm the spec sheet: LFP cells, a fast charge that reaches most of full quickly, and expansion to a genuinely large bankB4. It's also worth knowing the AC240P is the higher-capacity twin of the standard AC240, adding 307Wh over it and otherwise the same machineB0B3, so hands-on reports of either one describe the box you'd be buying.
“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
- 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]
- 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
“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]
- A3
“we expected the cooling fans to break that trend given the price point for this unit”
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]
- 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]
- A15
“I pay for an Ecoflow delta 2 1024wh but I receive something totally different. An Ecoflow 950 wh that doesn't fit my expertise or what I need.”
walmart.com — Customer reviews for EF EcoFlow DELTA 3 Classical 1000 · unknown · [negative]
- 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 September 13, 2026.
Who Should Buy Which
Buy the DELTA 3 Classic if you…
- →You're running a CPAP, a router and a couple of phones overnight. That's 320Wh against 870 usable, you'll never see the bottom of the battery, and it's the box you can lift onto a nightstand with one hand.
- →The unit gets carried: trunk to picnic table, garage to deck, your place to a friend's after a storm. One-hand portable is the difference between a unit that comes along and a unit that stays home.
- →You want something on a shelf for the next outage and you know exactly what plugs into it, a few lamps, the modem, phones, a laptop. The wall charge fills it in under an hour and Storm Guard tops it off before the weather arrivesA1A12.
- →The budget is the actual constraint. $469 buys a box that does two of the six jobs on this page outright and comes within one unplugged appliance of a third.
Buy the AC240P if you…
- →Your outage list is the fridge, the modem, the lights and devices for a whole evening, the full 1,645Wh of it. The AC240P is the only one of these two that a single trimmed appliance gets over the line.
- →The unit's permanent home is outdoors or in a rig: a job site, a boat deck, a trailer with a 30A inlet. The sealed shellB1B2 and the 30A RV outlet both say that's where BLUETTI expects it to sit.
- →You're prepping for outages measured in days rather than hours, where how fast the box comes back from the sun matters more than how full it started.
- →You already suspect 1,843Wh won't be enough eventually. It's the only one of the two with anywhere to go, and adding batteries here buys longer runtimes on the same loads rather than a path to backing up a house.
If neither fits
Anyone living in a van or running a compressor fridge around the clock should close this tab: that profile wants 4,685Wh a day and the AC240P covers a third of it, so the answer is a wired house bank with a proper alternator charger, not a portable box with a handle. Same goes for backing up a well pump or a furnace, which needs 240V that neither of these has. Look at hardwired home-backup systems instead.
The Bottom Line
Buy the DELTA 3 Classic. The strongest argument on the page is also the plainest: the first 870 usable watt-hours in this matchup cost about 54 cents each, the next 697 cost about a dollar forty-two, and those expensive ones still don't finish a camping weekend or, strictly on paper, an evening blackout. You're paying a premium rate for capacity that changes the answer on exactly one of six load profiles.
The reversal takes a minute to check. Add up a real evening: if it lands past 870 watt-hours, or the box is going to live on a boat deck or in a trailer, pay the difference and take the AC240P, which is the one with the sealed shell and the solar ceiling to come back on day two. If it doesn't, put the difference toward panels and carry your power station with one hand.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the BLUETTI AC240P worth almost $1,000 more than the EcoFlow DELTA 3 Classic?
Only if your daily draw clears about 870 usable watt-hours, or the box is going to live outdoors. Below that line the extra capacity sits untouched and you've paid for weight you have to carry. Above it, the DELTA 3 Classic simply runs out, and being cheaper doesn't fix running out.
Will either of these get me through an 8-hour blackout?
Not on paper. That profile needs 1,645Wh; the AC240P falls 78Wh short and the DELTA 3 Classic 775Wh short. In practice the AC240P is one unplugged appliance from finishing, while the DELTA 3 Classic covers a bit over half the evening, so treat it as a light-duty one-night box rather than a whole-house one.
Is the BLUETTI AC240P actually waterproof?
It carries an IP65 rating and hands-on testing backs it up, through a six-hour rainstorm and saltwater spray on a sailboat. The condition is that all the port covers have to be closed, so it's rated for sitting out in weather rather than for running cables through a downpour. The DELTA 3 Classic's record carries no ingress rating at all, which makes it an indoor and fair-weather unit by default.
Which one is quieter for sleeping next to?
The published numbers can't tell you. The DELTA 3 Classic is rated 30dB and the AC240P 45dB, but those come from two makers using their own methods at loads neither specifies, so the difference isn't a measured gap and shouldn't decide anything. What we do have is reviewer testing saying the DELTA 3 Classic runs quieter than its price suggests, and it's the smaller box you can put further from your head.
Can I add a battery to the DELTA 3 Classic later?
No. It's sealed at 1,024Wh, so the upgrade path is a second unit. The AC240P does take BLUETTI expansion batteries, but its first advantage is simply its own 1,843Wh base pack, and expansion is the step after that for someone who'd outgrow 1,843Wh as well. At this size, adding batteries buys longer runtimes on the same loads, not home backup.
Brand matchup
EcoFlow vs BLUETTI: measured across every matchup →Where to buy
EcoFlow DELTA 3 ClassicPick
$559.00
$559.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
BLUETTI AC240P
$1,461.99
$1,461.99 · direct from BLUETTI
Last checked 1 day ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.