Head-to-head test
EcoFlow DELTA 3 Max Plus vs BLUETTI AC240P
The DELTA 3 Max Plus beats the AC240P on price, capacity, output, weight, and noise — it's the AC240P's IP65 shell, not its spec sheet, that's the entire remaining argument for spending twice as much.
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
EcoFlow
DELTA 3 Max Plus
4,312Power Score · Appliance Class
$1,099.00 list · direct from EcoFlow
BLUETTI
AC240P
3,528Power Score · Appliance Class
$1,461.99 list · direct from BLUETTI
Spec deltas
The DELTA 3 Max Plus costs $999 to the AC240P's $1,939 and still holds 205Wh more capacity — a cheaper unit winning on capacity is unusual enough to say twice. It's also 21.3 lbs lighter and rated 15dB quieter, at 30dB against the AC240P's 45.
The AC240P's answer isn't on the spec sheet most buyers compare first. It's IP65-rated against dust and water, tested through a 6-hour rainstorm with a bone-dry interior and used aboard a sailboat under constant saltwater spray with no moisture getting inB2 — protection the DELTA 3 Max Plus was never built to claim.
So the decision is narrower than the price gap suggests. Most buyers should take the cheaper, bigger, quieter EcoFlow. Buyers setting this up somewhere wet or exposed are paying for a genuinely different product.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Capacity
$940 back at checkout, more capacity, and energy that's two and a half times cheaper over the unit's life — that's not a close call on value, it's a mismatch. The AC240P has to win somewhere else entirely to justify the gap.
the DELTA 3 Max Plus costs $999 to the AC240P's $1,939the DELTA 3 Max Plus holds 2,048Wh to the AC240P's 1,843Whthe DELTA 3 Max Plus costs $0.12 per lifetime kWh to the AC240P's $0.30
Why it mattersBuyers with no specific reason to need a weatherproof shell should treat the price gap as the deciding fact by itself.
continuous output
Those don't usually move together — a lighter power station is often the one that cuts corners on output or cooling. The DELTA 3 Max Plus doesn't; it's ahead on all three at once, which leaves the AC240P a case built on sealing, not performance.
the DELTA 3 Max Plus weighs 50.7 lbs to the AC240P's 72the DELTA 3 Max Plus is rated 30dB to the AC240P's 45dBthe DELTA 3 Max Plus outputs 3,000W to the AC240P's 2,400W
Why it mattersAnyone carrying this in and out of a vehicle regularly, or running it near where they sleep, gets three separate wins from the same unit.
solar input
None of those matter if the unit lives in a garage. All three matter if it's bolted to a boat, run at an exposed job site, or left uncovered through a storm — the only scenario where paying $940 more starts to make sense.
the AC240P accepts 1,200W of solar to the DELTA 3 Max Plus's 1,000Wthe AC240P carries a 6-year warranty to the DELTA 3 Max Plus's 5the AC240P's IP65 shell held through a 6-hour rainstorm and constant saltwater sprayB2
Why it mattersBuy the AC240P specifically for its weatherproofing and slightly larger solar ceiling, not for anything else on the spec sheet.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: The two-and-a-half-times cost-per-kWh gap is the clearest number on the page.
cost / lifetime kWh
$0.12 per lifetime kWh for the DELTA 3 Max Plus against $0.30 for the AC240P — two and a half times cheaper to run, on top of paying $940 less to buy it. Cycled daily, the DELTA 3 Max Plus pays back its energy over 11 years of use; the AC240P, 9.6.
This section isn't competitive on paper. The AC240P also carries fewer rated cycles — 3,500 to the DELTA's 4,000 — so its only route back into contention is the weatherproofing and solar ceiling covered elsewhere on this page.
Your Life, Your Pick
Selected because: Real loads show where the price gap actually shows up in daily use.
The 8-Hour Blackout is where the price gap shows up in daily use: the DELTA 3 Max Plus covers it using 94% of its capacity, while the AC240P needs 105% of its own and comes up short. Weekend Camping is a rare loss for both — 121% and 134% of what's needed, respectively — so a 2,100Wh weekend trip is outside either unit's comfort zone alone.
CPAP Overnight, Remote Workday, and Tailgate Party are comfortable wins for both, with the DELTA 3 Max Plus carrying a little more headroom in each. Van Life Daily needs somewhere between two and a half and three times either unit's capacity, so full-time rig living is a different shopping list entirely.
What the Specs Don't Tell You
Selected because: Weight, noise, surge, and warranty all cut the same direction except one.
rated cycles
The AC240P's weight (72 lbs) and noise (45dB under load) are informational, not warnings — but both are worse numbers than the DELTA 3 Max Plus's 50.7 lbs and 30dB. Surge headroom favors the DELTA 3 Max Plus too: its 6,000W surge is twice its 3,000W continuous rating, where the AC240P's 3,600W surge is one and a half times its 2,400W — a thinner cushion for a fridge or AC compressor's startup spike.
The AC240P's one gotcha that runs the other way is warranty: 6 years to the DELTA 3 Max Plus's 5, the single line item where paying more actually rents you something. Everywhere else on this list — weight, noise, surge headroom, switchover speed — the extra $940 doesn't buy an advantage.
Brand Trust
Selected because: Cross-brand pairing — ecosystem and support differ meaningfully.
EcoFlow runs the bigger lineup by model count and the faster charging technology in the category. BLUETTI counters with the wider price range top to bottom and, specific to this pairing, the only unit actually built to survive rain or salt spray.
Support is a wash of different weaknesses rather than a clear edge either way — EcoFlow's swings between hassle-free replacements and long waits, BLUETTI's runs slower over email but improves buying direct. Neither brand's support history should be the deciding factor here; the spec sheet and the IP65 rating already did that.
Strengths & trade-offs
EcoFlow DELTA 3 Max Plus
Strengths
- +Costs $363 less
- +Lighter by 21.3 lb
- +Larger battery capacity
- +Higher AC output
Trade-offs
- –No major technical downsides compared to rival.
BLUETTI AC240P
Strengths
- +Longer warranty
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$363) than the DELTA 3 Max Plus.
- –Significantly heavier (+21.3 lbs), making it harder to move.
- –Weaker inverter (-600W) 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
Neither unit
Both units come up short here — 121% of the DELTA 3 Max Plus's capacity and 134% of the AC240P's, against a 2,100Wh weekend draw. Neither is wrong to buy for camping, but plan on charging mid-trip or bringing the expansion battery either one supports.
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 Plus
The DELTA 3 Max Plus covers a fridge-plus-lights blackout using 94% of its capacity; the AC240P needs 105% of its own and comes up short. For a real outage, that's the difference between finishing the night and not.
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 Plus runs 8.5h vs 7.6h.
$1,099 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 Plus
Take the DELTA 3 Max Plus unless you specifically need a weatherproof shell. It's $940 cheaper, holds 205Wh more capacity, pushes 600W more continuous output, weighs 21.3 lbs less, and runs 15dB quieter — and its lifetime cost works out to $0.12 per kWh against the AC240P's $0.30, two and a half times cheaper to run. The AC240P answers with exactly three things: a 200W larger solar ceiling, one extra warranty year, and an IP65 shell tested through a 6-hour rainstorm and constant saltwater sprayB2. That's a real case for a boat, a job site, or an exposed setup — it's not a case for a garage or an RV parked under a roof.
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.
$1,099.00 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 Plus rates 4.3/5 (58th 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.
Two different cushions for a compressor spike
The DELTA 3 Max Plus's 6,000W surge is twice its 3,000W continuous rating; the AC240P's 3,600W surge is one and a half times its 2,400W rating. Starting a fridge or AC compressor's spike is where that gap would show up first, and it favors the cheaper unit.
UPS Speed: line-interactive (<10ms) vs standby (<20ms)
The DELTA 3 Max Plus 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.
Full record above — the Test Desk pick is the DELTA 3 Max Plus.
Check DELTA 3 Max Plus 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 Plus wins on both sticker price and long-term value. At $0.13/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner.
Delivers each lifetime kWh for $0.10 less — check the DELTA 3 Max Plus price →
Brand trust
EcoFlow
Ecosystem
The largest portable-power lineup in the category — a dozen-plus models spanning DELTA Pro, DELTA 3, and RIVER 3, plus solar panels and smart home panels.
Support
US-based support with a mixed track record — plenty of hassle-free prepaid-label replacements, but also reports of long waits and refurbished units sent out for new claims. Buying through a major retailer adds a 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 fastest charging technology in the category and the deepest expansion ecosystem, scaling well past what most home setups need.
Worth knowing
A 2025 recall on an unrelated DELTA Max model is worth knowing about, though it doesn't touch this unit specifically.
BLUETTI
Ecosystem
One of the broadest lineups in the category, from budget units to multi-kWh flagships, including sodium-ion and vehicle-integration products the DELTA lineup doesn't have.
Support
The most inconsistent support of the major brands — some owners get smooth service, others weeks of runaround. Buying direct from BLUETTI tends to produce better outcomes than third-party retailers.
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 strongest capacity-to-price ratio in the market, and the only one of these two with a genuinely weatherproof, IP65-rated shell.
Worth knowing
Older or discontinued BLUETTI models can become hard to source parts for — worth checking before buying into an aging model.
Analyst note
EcoFlow has the bigger ecosystem and the faster charging technology; BLUETTI answers with the wider price range and, in this specific pairing, the only unit built to survive real weather. Support quality is a wash between the two, so this stays a decision about price and ruggedness, not brand trust.
Growth path
DELTA 3 Max Plus
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 Plus
The DELTA 3 Max Plus is reviewed as a genuine step up from the standard DELTA 3 Max — 3,000W continuous with a 6,000W surge, a real jump from the Max's 2,400W and 4,800WA1. Reviewers describe it staying quiet under typical loads, with fans only spinning up briefly at shutdown, and the decibel meter barely rising above room noise even at full charge one meter awayA2.
It also charges fast, reaching 80% in about 50 minutes and full in around 70A3, and scales from 2kWh up to 10kWh through Smart Extra Batteries, which reviewers describe as polished and effortless to addA4.
“Bumps output to 3,000W continuous with a 6,000W surge — a significant upgrade over the DELTA 3 Max's 2,400W and 4,800W surge.”
Sources
storagereview.com · androidguys.com · t3.com · trustedreviews.com
BLUETTI AC240P
The AC240P sits at the premium end of BLUETTI's own lineup — the 1,843Wh version of the AC240 platform, 307Wh more than the standard AC240, with distinctive orange IP65 branding and a fast charge that reaches most of full quicklyB3B4.
Against a non-rugged competitor like the DELTA 3 Max Plus, its real differentiator is the shell itself: water- and dust-resistant, tested through a 6-hour rainstorm with a bone-dry interior, and used on a sailboat under constant saltwater spray with no moisture intrusion after a wipe-downB2. The one caveat owners flag is that the rating only holds with every port cover closedB1.
“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
- The Max Plus delivers more output and surge than the Max, plus a larger expansion ceiling, while staying quiet and fast-charging — a polished, higher-power take on the same platform. [DELTA 3 Max Plus · 3 entries]
- IP65 ruggedness proven in rain and saltwater, big expandability, and fast charging are the praise; the caveat is that water resistance only holds with port covers closed. [AC240P · 3 entries]
- A1
“Bumps output to 3,000W continuous with a 6,000W surge — a significant upgrade over the DELTA 3 Max's 2,400W and 4,800W surge.”
storagereview.com / androidguys.com — DELTA 3 Max Plus review · 2026 · [positive]
- A2
“Stays genuinely quiet under typical loads, only spinning up its fans briefly during shutdown; even charging at full power the decibel meter barely registered above room noise at one meter.”
t3.com / trustedreviews.com — DELTA 3 Max Plus review · 2026 · [positive]
- A3
“Fast charging — reached 80% in about 50 minutes and full in around 70 minutes.”
t3.com — DELTA 3 Max Plus review · 2026 · [positive]
- A4
“Scalable — supports expandable capacity from 2kWh up to 10kWh via Smart Extra Batteries, with 5 charging methods; reviewers describe it as polished and effortless.”
storagereview.com / t3.com — DELTA 3 Max Plus 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 Plus if you…
- →You want the better deal on nearly every spec — $940 less, more capacity, more output, lighter, and quieter.
- →You charge fast and often — 80% in about 50 minutesA3 beats a slower overnight top-up.
- →You don't need a weatherproof shell and can keep the unit somewhere dry.
Buy the AC240P if you…
- →You need a genuinely IP65-rated shell for a boat, job site, or exposed setup — the DELTA 3 Max Plus has no comparable rating.
- →Your setup leans on solar and you want the extra 200W of input ceiling.
- →You want the extra warranty year and don't mind paying for it.
If neither fits
Weekend Camping needs 121% of the DELTA 3 Max Plus's capacity and 134% of the AC240P's — a 2,100Wh weekend trip outruns both alone. Buyers planning multi-day trips off one battery should size up or plan on an expansion battery from the start; both units support one.
The Bottom Line
The DELTA 3 Max Plus wins this one on nearly every number that matters — price, capacity, output, weight, and noise all favor it, and its lifetime cost per kWh runs two and a half times cheaper than the AC240P's.
The AC240P's entire counter-argument is three specific things: a 200W larger solar ceiling, one extra warranty year, and an IP65 shell proven through a 6-hour rainstorm and saltwater sprayB2. Buy it for exactly those reasons, or buy the DELTA 3 Max Plus and keep the $940.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
EcoFlow DELTA 3 Max Plus vs BLUETTI AC240P — which should I buy?
The DELTA 3 Max Plus for nearly everyone: $940 cheaper, 205Wh more capacity, 600W more output, 21.3 lbs lighter, and quieter at 30dB against the AC240P's 45. Take the AC240P only if you need its IP65-rated shell for wet or dusty conditions, or want the slightly larger 1,200W solar ceiling and the extra warranty year.
Is the DELTA 3 Max Plus expandable like the AC240P?
Yes — both support add-on batteries, so expansion isn't a differentiator here the way it often is in this category. Pick based on price, weatherproofing, and weight instead, since both units can grow with your needs later.
Which one is better for solar charging?
The AC240P, by a real but modest margin: it accepts 1,200W of solar input to the DELTA 3 Max Plus's 1,000W. That 200W gap is the one spec category where the pricier unit pulls ahead.
Which is quieter?
The DELTA 3 Max Plus, rated at 30dB against the AC240P's 45 — reviewers describe it staying near-silent under typical loads, with fans only spinning up briefly at shutdown. That's a 15dB gap, noticeable if either unit runs near where you sleep or work.
Where to buy
EcoFlow DELTA 3 Max PlusPick
$1,099.00
$1,099.00 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.