Head-to-head test
EcoFlow DELTA 3 Ultra vs BLUETTI AC240P
The EcoFlow is $740 cheaper and holds 1,229Wh more — it out-specs the AC240P on nearly every line, so the BLUETTI's only real case left is that it's the one you can leave in the rain.
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
EcoFlow
DELTA 3 Ultra
5,362Power Score · The AC & Fridge Zone
$1,299.00 list · direct from EcoFlow
BLUETTI
AC240P
3,528Power Score · Appliance Class
$1,461.99 list · direct from BLUETTI
Spec deltas
The EcoFlow DELTA 3 Ultra costs $740 less than the BLUETTI AC240P and holds 1,229Wh more — $1,199 for 3,072Wh against $1,939 for 1,843Wh. The cheaper unit being the bigger one usually settles a matchup on its own, and here it's only the start.
The EcoFlow also out-powers the AC240P where it counts: 3,600W continuous output against 2,400W, a 7,200W surge against 3,600, a higher 1,600W solar ceiling, and a faster line-interactive UPS that switches in under 10ms. It's quieter under load too, rated at 30dB against the AC240P's 45. On the spec sheet, this is a near-sweep.
The AC240P's answer is a single, genuine strength: it's IP65-rated and built to shrug off rain and saltwater, where the EcoFlow — premium as its build feels — isn't weather-sealed. That's the whole matchup. If the box lives outdoors, the BLUETTI has a reason to exist. If it lives indoors, the EcoFlow wins going away.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Capacity
That collapses the usual price-versus-size tradeoff entirely. Run it to the per-kWh figure and the EcoFlow delivers energy at $0.10 against the BLUETTI's $0.30 — a third the cost — and it's cheaper per warranty year too, $240 against $323. There's no angle on the value math where the AC240P comes out ahead.
The EcoFlow costs $740 less than the AC240P ($1,199 vs $1,939)The EcoFlow holds 1,229Wh more (3,072Wh vs 1,843Wh)
Why it mattersAnyone choosing on price, capacity, or cost-to-own should stop here — the EcoFlow wins all three at once.
A fridge or AC compressor pulls 2-3x its rated draw at startup, and the EcoFlow's 7,200W surge swallows that without noticing. The AC240P's 3,600W surge is real headroom for most loads, but it's the EcoFlow's everyday number — so the heavy simultaneous loads that make the AC240P work hard are the EcoFlow's cruising speed.
The EcoFlow surges to 7,200W; the AC240P surges to 3,600WThe EcoFlow's 3,600W continuous output equals the AC240P's entire surge ceiling
Why it mattersBuyers running big or stacked appliance loads — whole-room backup, power tools, a well pump — should take the EcoFlow's output for the margin it isn't even straining to give.
Strip away the weatherproofing and there's no spec left where the AC240P leads except a single extra warranty year, 6 against 5. So its entire remaining case rests on one question: is this box going to get rained on? That's not a small thing for a boat or a job site, but it's the only thing.
The AC240P is IP65-rated and held up through a 6-hour rainstorm and constant saltwater sprayB2The EcoFlow's build is praised as premium and durable but it carries no IP weather ratingA9
Why it mattersOnly the buyer who genuinely needs an outdoor-rated unit should choose the AC240P here; indoors, there's no line item left for it to win.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: The EcoFlow is cheaper up front AND a third the cost per kWh — the single most lopsided part of the page.
cost / lifetime kWh
This is the most lopsided section on the page. The EcoFlow costs less to buy and far less to run: $0.10 per lifetime kWh against the AC240P's $0.30, and $240 per warranty year against $323. It's rare to see the cheaper unit also be the cheaper-per-watt-hour one — usually you trade one for the other — but here the EcoFlow simply wins both.
The AC240P's longer 6-year warranty is its one thread of a comeback, a year more coverage than the EcoFlow's 5. That's worth something. It is not worth $740 and half again the cost per kWh, which is what you'd be paying for it.
PowerScore Breakdown
Selected because: 5,450 vs 3,388 is a wide composite gap that reflects real output and capacity leads, not noise.
overall power score
The engine scores the EcoFlow at 5,450 against the AC240P's 3,388, and the gap is earned across the board — nearly double the surge, 1,229Wh more capacity, more continuous output, more cycles, and a higher solar ceiling all stack into it. This isn't a composite tilted by one metric; it's a broad lead.
The AC240P is a strong unit in isolation. The score reads low only because it's standing next to a bigger, cheaper, more powerful one. Against most rivals it would look good; against this one it's giving up ground on almost every axis the score measures.
Your Life, Your Pick
Selected because: The EcoFlow takes camping, blackout, workday, and tailgate; the AC240P wins none it isn't tied on.
The EcoFlow takes weekend camping, the 8-hour blackout, the remote workday, and the tailgate — every scenario that isn't a tie — and the two heavy ones are the story. It clears a 2,100Wh camping weekend and a 1,645Wh blackout that the AC240P can't cover on its own, because 3,072Wh simply reaches further than 1,843Wh.
The CPAP night is the only true tie, and even there the framing favors the EcoFlow: at a 320Wh load it uses about 12% of its battery against the AC240P's 20%, and it's the quieter unit two feet from your head. The one heavy scenario both lose — van life at 4,685Wh — is a job for expansion batteries on either unit, and the EcoFlow starts closer and has the higher solar ceiling to get there.
What the Specs Don't Tell You
Selected because: Surge-ratio advantage, faster line-interactive UPS, and the IP65 weather story all live here.
rated cycles
The UPS card is a real EcoFlow advantage: its line-interactive switchover in under 10ms is a genuine step above the AC240P's standby-grade transfer, and reviewers describe the failover as seamless, with no dips or shutdowns when the wall power dropsA5A6. For a desktop, a NAS, or medical gear that can't tolerate a blink, that's the difference that matters.
The surge card points the same way — the EcoFlow's 7,200W ceiling is twice the AC240P's 3,600W. The one card that goes to the BLUETTI isn't in this list at all: it's the IP65 rating. That's the honest catch on the EcoFlow, and it's worth saying plainly. The DELTA 3 Ultra is built like a tank, but it isn't sealed against water, and the AC240P is. If your use is outdoors, that lone card outweighs the stack the EcoFlow wins.
Brand Trust
Selected because: Cross-brand pair; EcoFlow's recall history and BLUETTI's support inconsistency are both worth an honest word.
Both brands come with an asterisk worth reading. EcoFlow had an October 2025 recall on a different model — the DELTA Max 2000, for overheating risk — which is worth knowing even though it doesn't touch this unit; the company's support and community are otherwise the largest and most active in the space. BLUETTI's support is the most inconsistent in the category, email-based with timezone delays.
For either, the same hedge applies: buy from a retailer with its own return window. Both companies have polarized support reputations, and the strongest protection isn't the brand's warranty desk — it's a Costco or Amazon return policy standing behind your purchase for the first stretch of ownership.
Strengths & trade-offs
EcoFlow DELTA 3 Ultra
Strengths
- +Costs $163 less
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
Trade-offs
- –No major technical downsides compared to rival.
BLUETTI AC240P
Strengths
- +Lighter by 5.2 lb
- +Longer warranty
Trade-offs
- –Weaker inverter (-1,200W) limits appliance compatibility.
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
DELTA 3 Ultra
The EcoFlow clears a 2,100Wh weekend where the AC240P falls short — 3,072Wh reaches into a second day the 1,843Wh BLUETTI can't. Unless the campsite means rain exposure, in which case the AC240P's sealed shell earns a look, this is the EcoFlow's scenario.
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 Ultra
A 1,645Wh blackout load sits inside the EcoFlow's capacity and beyond the AC240P's, so the EcoFlow carries the outage where the BLUETTI would need rationing. Add its faster line-interactive UPS and it's the more complete backup here by a clear margin.
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
A true tie on raw capacity — both cover a 320Wh night with ease — so break it on the details. The EcoFlow uses about 12% of its battery against the AC240P's 20% and runs quieter two feet from your head, which is the spec that actually matters at 3 a.m.
Battery budget usedlower = more headroom
LOAD CPAP Machine 40W×8h
SCN-04 · 8 hours · needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
DELTA 3 Ultra
Both finish a 910Wh workday, but the EcoFlow does it barely touching its reserve, and its sub-10ms UPS means a desktop or monitors never see the power hiccup when the grid drops. For a home office, that seamless switchover is the tiebreaker.
Battery budget usedlower = more headroom
LOAD Laptop 60W×8h · External Monitor 30W×8h · Router + Modem 20W×8h · Phone Charger 15W×2h
SCN-05 · 4 hours · needs 670Wh
Tailgate Party
Game day power for the crew
DELTA 3 Ultra
Both handle game day, and the DELTA 3 Ultra does it with more in reserve — 26% used against 43%. Tailgating is a light load, so that headroom counts for less here than the 5 lbs you'll actually carry across the parking lot.
Battery budget usedlower = more headroom
LOAD Blender 400W×0.5h · LED TV (55") 80W×4h · Bluetooth Speaker 15W×4h · Phone Charger (×3) 45W×2h
SCN-06 · 24 hours · needs 4,685Wh
Van Life Daily
A full day of mobile living — the ultimate endurance test
Neither unit
Neither unit can fully handle this scenario (needs 4,685Wh). You'd need a higher-capacity station or to cut back on usage.
Battery budget usedlower = more headroom
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the six scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
For this load: DELTA 3 Ultra runs 12.7h vs 7.6h.
$1,299 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 0–174.1hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–34.8hHigh-Draw Appliances
These reveal the real limitsscale 0–2.6h¹ 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
July 16, 2026
Verdict: the DELTA 3 Ultra
Take the EcoFlow DELTA 3 Ultra — this one isn't close on the numbers. It costs $1,199 against the AC240P's $1,939, and for that $740 less it gives you more of nearly everything: 3,072Wh against 1,843Wh, 3,600W continuous output against 2,400W, a 7,200W surge against 3,600W, 4,000 charge cycles against 3,500, a higher 1,600W solar ceiling, quieter operation, and a faster line-interactive UPS. Per lifetime kWh it delivers energy at $0.10 against the BLUETTI's $0.30. The AC240P holds exactly one card the EcoFlow can't answer: an IP65-rated shell proven in rain and saltwater. If this unit is going to live on a boat, a job site, or an open deck, that weatherproofing is worth choosing it for. For everyone charging indoors, the EcoFlow is more unit for less money, and it isn't a hard call.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 16, 2026. The links below open EcoFlow's and BLUETTI's current prices.
$1,299.00 list · direct from EcoFlow
or check the AC240P price$1,461.99 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated July 16, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Full specifications
ᵈ Derived: price ÷ rated capacity. See the data behind our comparisons →
Comparison ToolAdd more power stations, side by sideOpen Tool →How these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it — no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews — see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity × 0.85 inverter efficiency) ÷ device wattage. Solar recharge estimates assume panels deliver 70% of rated output. Cold weather, battery age, and stacked loads reduce real-world results.
Power Score
Computed from 14 published spec dimensions, weighted per use-case bench. Higher is better; a unit must meet a bench's minimum threshold to be rated.
See the full weight table and data sourcing on our methodology page →Class ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews — no buyer opinions feed it. We score every station on size-independent quality (value, output, portability, endurance, ports, warranty, and more), then percentile-rank it against the other units in its capacity class, so a class-leading compact unit and a class-leading whole-home unit can both earn 5★. Here, DELTA 3 Ultra rates 5.0/5 (99th 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.
Weight Reality Check
Neither unit is grab-and-go. The AC240P (72 lbs) is manageable solo but heavier than a large checked suitcase. The DELTA 3 Ultra (77.2 lbs) is noticeably heavier. That's a 5 lb difference.
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.
The EcoFlow surges to twice the ceiling
The EcoFlow pairs 3,600W continuous with a 7,200W surge; the AC240P runs 2,400W continuous to a 3,600W surge. What the BLUETTI can do only for a momentary spike, the EcoFlow does as its everyday output. For compressor startups and stacked loads, that headroom is decisive.
Line-interactive beats standby
The EcoFlow's line-interactive UPS switches in under 10ms against the AC240P's standby-grade transfer. For a desktop, NAS, or medical device that can't tolerate even a brief blink, that faster, cleaner failover is a real advantage — the kind of spec you only notice when it saves you from a hard shutdown.
Full record above — the Test Desk pick is the DELTA 3 Ultra.
Check DELTA 3 Ultra 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 Ultra wins on both sticker price and long-term value. At $0.11/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner.
Delivers each lifetime kWh for $0.12 less — check the DELTA 3 Ultra 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 deepest product ecosystem and fastest-charging technology in the category, with the largest and most active owner community for help and mods.
Worth knowing
An October 2025 recall on a different model, the DELTA Max 2000, is worth knowing though it doesn't affect this unit. Support experiences are polarized, so buy from a retailer with a solid return policy.
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 broadest lineup in the space and a rugged, weather-ready design ethos — the IP65 shell here is the clearest example of what sets BLUETTI's tougher units apart.
Worth knowing
Support is the most inconsistent in the category, email-based with timezone delays. Buying direct from BLUETTI tends to produce better outcomes than third-party channels.
Analyst note
EcoFlow brings the deeper ecosystem, faster charging, and bigger community; BLUETTI brings the rugged, weather-sealed design. With either, the retailer's return window is your best safety net given both brands' uneven support reputations.
Growth path
DELTA 3 Ultra
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 3,072Wh.
Accepts up to 1,600W 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, but the DELTA 3 Ultra's higher solar ceiling (1,600W vs 1,200W) gives it the stronger off-grid growth path — more panels can feed a bigger bank as it grows.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3 Ultra
Field data on the DELTA 3 Ultra is genuinely thin — it's a recent release, and most of what exists comes from launch-window professional reviews rather than long-term owners, with several reviewers testing the closely related Ultra Plus variant. Treat the following as early impressions, not years of ownership.
Within that limit, the reviews are consistent. Testers report the fans stay quiet even when the inverter is pushed to its maximum output, a clear step up from older EcoFlow unitsA1A2. The UPS behavior draws repeated praise — one reviewer accustomed to APC battery backups said it switched over identically, with no shut-offs or dips when unplugged from the wallA5A6. The build gets called substantial and durable rather than cheap or fragileA9, and while its heft is flagged as a real portability drawback, testers note the wheels and telescoping handle make it manageableA10A14.
“Even when you're pushing it hard, the DELTA 3 Ultra Plus runs much quieter than older EcoFlow models, like the DELTA 2 Max.”
Sources
thesolarlab.com · postperspective.com · appleinsider.com · digitaltrends.com · popsci.com
BLUETTI AC240P
The AC240P reads as the premium end of BLUETTI's line — the higher-capacity 1,843Wh option with LFP cells, a fast charge that reaches most of full quickly, and expandability to a large multi-kWh bankB3B4. Reviewers point to it as the right pick when you want the extra capacity and the more visible, rugged designB3.
Its signature is weatherproofing. One reviewer left it out in a 6-hour rainstorm and watched the water bead off with the interior bone-dry, and another ran it through constant saltwater spray on a sailboat with no moisture intrusion after a wipe-downB2. The one caveat owners flag: the IP65 rating only holds with every port cover closed, so plugging a cable in and using it in the rain compromises the sealB1.
“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 the quiet fan operation of the Ultra-tier unit compared to older EcoFlow models, though this is described in professional test conditions rather than long-term ownership. [DELTA 3 Ultra · 2 entries]
- UPS/switchover performance is repeatedly called seamless with no observed dips or shutdowns during power interruption tests. [DELTA 3 Ultra · 3 entries]
- The unit's substantial 74 lb weight is flagged across multiple reviews as a portability drawback, mitigated somewhat by wheels and handle design. [DELTA 3 Ultra · 2 entries]
- Build quality/durability (casing, cable, port covers) is repeatedly highlighted as premium and well-engineered. [DELTA 3 Ultra · 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
“Even when you're pushing it hard, the DELTA 3 Ultra Plus runs much quieter than older EcoFlow models, like the DELTA 2 Max.”
thesolarlab.com — EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? · 2025-09/10 (approx) · [positive]
- A2
“Even when you're pushing the inverter to its maximum output, the fans never become annoying or distracting.”
thesolarlab.com — EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? · 2025-09/10 (approx) · [positive]
- A5
“Over my career I have become accustomed to APC batteries immediately switching on when there is a power hit or power shut-off, and the EcoFlow Delta 3 Ultra Plus works in the exact same way.”
postperspective.com — Review: EcoFlow Delta 3 Ultra Plus Portable Power Station · 2026-04 · [positive]
- A6
“I didn't experience any shut-offs or dips when I unplugged the EcoFlow from the wall.”
postperspective.com — Review: EcoFlow Delta 3 Ultra Plus Portable Power Station · 2026-04 · [positive]
- A9
“It does not feel cheap or fragile. Everything from the outer shell case to the plastic buttons and the AC cable feels substantial and durable enough to withstand day-to-day wear and tear.”
appleinsider.com — EcoFlow Delta 3 Ultra Plus review: Premium, but solid power · 2025-11-16 · [positive]
- A10
“Weighing in at a thunderous 74 pounds, the Ultra is not considered lightweight by any standards.”
appleinsider.com — EcoFlow Delta 3 Ultra Plus review: Premium, but solid power · 2025-11-16 · [mixed]
- A14
“The sturdy telescoping handle and wheels make it effortless to cart around, and if you do have to lift its admittedly somewhat hefty 74 lbs, grab handles are well placed for the task.”
popsci.com — EcoFlow DELTA 3 portable power station series first impressions · 2025-09-29 · [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 16, 2026.
Who Should Buy Which
Buy the DELTA 3 Ultra if you…
- →The buyer who wants the most capacity and output per dollar — 3,072Wh and 3,600W for $1,199 is more unit for less money than the AC240P offers at any spec.
- →Anyone backing up a desktop, NAS, or medical device: the line-interactive sub-10ms UPS is a genuine step above the AC240P's standby switchover.
- →Heavy-load users — power tools, a well pump, whole-room backup — who'll lean on the 7,200W surge the AC240P can't match.
Buy the AC240P if you…
- →The boat owner, open-trailer hauler, or jobsite crew who needs an IP65-rated unit that survives rain, dust, and saltwater — the one thing the EcoFlow can't do.
- →The buyer who values the extra warranty year and BLUETTI's rugged, weather-ready design over raw capacity and price.
If neither fits
If your target is van life at 4,685Wh, neither base unit reaches it alone — both need expansion batteries to get there. Start by pricing an expansion bundle or a larger single unit; the EcoFlow is the better base to build on given its higher capacity and 1,600W solar ceiling, but don't expect either box to cover that load out of the carton.
The Bottom Line
Buy the EcoFlow DELTA 3 Ultra. It's $740 cheaper, holds 1,229Wh more, outputs more continuously and surges to twice the ceiling, runs quieter, switches faster on a power drop, and delivers energy at a third the cost per kWh. When the cheaper unit is also the bigger and more capable one, the value question answers itself.
The AC240P keeps one honest reason to exist, and it's a good one: it's the unit you can leave in the rain. On a boat, a job site, or an open deck, its IP65 shell is the only one of the two that survives, and there the premium is money well spent. Everywhere with a roof, the EcoFlow is the better box by nearly every measure that counts.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the EcoFlow DELTA 3 Ultra really cheaper than the BLUETTI AC240P?
Yes, and by a wide margin — $1,199 against $1,939, a $740 difference, while also holding 1,229Wh more capacity. It's the unusual case where the cheaper unit is also the larger and more powerful one. Per lifetime kWh delivered, the EcoFlow costs about a third as much.
What does the AC240P do better than the DELTA 3 Ultra?
One thing that matters: it's IP65 weather-rated and proven in rain and saltwater, where the EcoFlow isn't sealed against water. It also carries a 6-year warranty against the EcoFlow's 5. On price, capacity, output, cycles, noise, and UPS speed, the EcoFlow leads.
Which is better for running a fridge or power tools?
The EcoFlow, comfortably. Its 3,600W continuous output and 7,200W surge handle compressor startups and stacked loads that push the AC240P's 2,400W/3,600W closer to its limit. For heavy or simultaneous appliances, the extra headroom is the deciding factor.
Is the DELTA 3 Ultra proven long-term?
Not yet. It's a recent release, and most available reviews are launch-window professional tests rather than multi-year ownership data — some reviewers even tested the Ultra Plus variant. Early impressions are strong on quiet operation, UPS performance, and build quality, but there's limited long-term field data so far.
Where to buy
EcoFlow DELTA 3 UltraPick
$1,299.00
$1,299.00 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.