Head-to-head test
EcoFlow DELTA 2 vs BLUETTI AC180
Only one of these is still on sale, and it happens to be the bigger battery: the AC180 gives up the retired DELTA 2's lighter, expandable body for more capacity and a longer-rated pack.
Full profiles: EcoFlow DELTA 2 β Β· BLUETTI AC180 β
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
Spec deltas
EcoFlow no longer sells the DELTA 2. Its store page forwards to the DELTA 3, which leaves the BLUETTI AC180 as the only unit on this page you can buy new, and it's our pick.
Underneath, they're closer cousins than rivals. Both run an 1,800W inverter with 2,700W surge, take 500W of solar, and top out at 100W per USB-C port. The AC180 carries the bigger battery, 1,152Wh to 1,024, and rates it for 3,500 cycles against 3,000. The DELTA 2 answers with a 27 lb body against 35.3, six AC outlets to four, and the only expansion port in the pair.
So the page has two readers. If you own a DELTA 2, the AC180 is less an upgrade than a sideways step that weighs more. If you're shopping, the AC180 is the call, unless the DELTA 2's light carry or growth path was the reason it made your list. Then the comparison you actually need is the AC180 against the DELTA 3.
What the Numbers Reveal
Each conclusion stated first β the numbers behind it on one line, the full analysis below.
rated cycles
The day-to-day version of that gap lands on one scenario. A 910Wh remote workday leaves the AC180 69Wh in hand and the DELTA 2 40Wh short. A sliver of battery on the spec sheet turns out to be exactly the slice that decides whether the laptop dies before you close it.
AC180: 1,152Wh, rated 3,500 cyclesDELTA 2: 1,024Wh, rated 3,000 cyclesRemote Workday needs 910Wh; usable after the flat 85% factor is 979Wh (AC180) vs 870Wh (DELTA 2)
Why it mattersIf your battery day runs close to 910Wh, the AC180 finishes it where a DELTA 2 has to ration.
weight
The AC180 asks you to carry the extra weight, which one reviewer named their biggest frustration with itB2, and to size for today, because 1,152Wh is the ceiling. Neither is a reason to hunt down a discontinued DELTA 2. Both are a reason to look at the DELTA 3, which EcoFlow positions as the like-for-like replacement, before settling.
DELTA 2: 27 lbs, supports EcoFlow expansion batteriesAC180: 35.3 lbs, sealed at 1,152WhDELTA 2 is no longer sold; EcoFlow's store forwards to the DELTA 3
Why it mattersAnyone who shortlisted the DELTA 2 for the carry or the growth path should compare the AC180 against the DELTA 3 instead.
Both units are reported loudest while charging fast, and both let you slow the charge to quiet themA2B1. The AC180 takes the CPAP row on its lower published rating and a larger cushion, 659Wh left after the night against 550Wh, but neither maker's figure describes a 40W draw. The practical rule is the same for both: recharge on the slow setting, or recharge in another room.
DELTA 2 fans trigger above ~120W and run ~48-55 dB at maximum loadA1AC180 fan reports are mixed and loudest while charging; a silent charging mode caps itB1CPAP Overnight: 320Wh at a 40W peak
Why it mattersCPAP users can run either through the night; buy the AC180 because it's the one on sale, and set it to charge quietly.
The specific dimensions that decide these two units β everything else is a tie.
Your Life, Your Pick
Selected because: The remote workday is the one row where the AC180's larger battery changes the outcome, and three rows are too big for either unit.
Three of the six rows end in 'neither', and they're the three heavy ones: the camping weekend, the blackout and the van. That's a size verdict, not a brand one. Either box covers roughly half to three-fifths of an eight-hour outage, and no amount of choosing between these two changes that.
Where they do separate, the AC180 takes it on margin. The workday row is the one to read: the DELTA 2 runs dry with a sliver of the day left and the AC180 doesn't. The CPAP row goes the same way on thinner grounds, since both cover the night with hundreds of watt-hours to spare.
Growth Path
Selected because: Only the DELTA 2 expands, and with it off sale, that now helps owners rather than shoppers.
Expansion is the one thing the DELTA 2 does that the AC180 can't, and it has become an owner's feature. If you already have a DELTA 2 and want more runtime, its expansion port is the direct route. Trading it for an AC180 gets you a slightly bigger sealed box and a heavier carry.
For a new buyer the question flips. The AC180 is sealed, so size it for the loads you have today. If you expect to outgrow it, don't buy it hoping; that's the one case where EcoFlow's DELTA 3, the expandable replacement, is the box to price instead.
Portability & Form Factor
Selected because: The DELTA 2 weighs 27 lbs to the AC180's 35.3, its clearest advantage over our pick.
weight
Eight pounds and change is the DELTA 2's best argument, and it left the range with the unit. At 27 lbs the DELTA 2 is a one-hand carry from trunk to campsite. The AC180 is a two-hand lift that one reviewer called their biggest frustrationB2.
If the box will live under a desk or beside the fridge, skip this section. If it rides in the car every weekend, the weight is the honest reason to look at EcoFlow's replacement before you commit to the AC180.
What the Specs Don't Tell You
Selected because: Noise, a sealed capacity ceiling and warranty fine print are the three cards that fire on this pair.
rated cycles
The noise card fires against the DELTA 2, but the two published ratings come from makers who don't measure the same way, so they can't tell you which is quieter in your bedroom. The field reports do more work: the DELTA 2's fans start above roughly 120WA1, and both units get loud when charging fast and settle down on a slow chargeA2B1.
The expansion card fires against the AC180, and it's the honest catch on our pick: 1,152Wh is all it will ever hold. The warranty card is a draw on term, five years each, with one piece of fine print on the BLUETTI side: it reaches the full term only bought direct or registered.
Strengths & trade-offs
EcoFlow DELTA 2
Strengths
- +Lighter by 8.3 lb
Trade-offs
- βNo major technical downsides compared to rival.
BLUETTI AC180
Strengths
- +Larger battery capacity
Trade-offs
- βNo major technical downsides compared to rival.
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 Β· 2 nights Β· needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
Neither unit
Neither unit covers this scenario's 2,100Wh: the DELTA 2 comes up 1,230Wh short (about 41% covered), the AC180 1,121Wh (47%). Treat this as partial cover β enough for the essentials in it, not the whole list.
Battery budget usedlower = more headroom
LOADΒ Β Phone Charger 15WΓ6h Β· LED Lights 40WΓ8h Β· Box Fan 75WΓ14h Β· CPAP Machine 40WΓ16h
SCN-02 Β· 8 hours Β· needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
Neither unit
Neither covers the 1,645Wh this outage asks for. The AC180 gets about 60% of the way and the DELTA 2 about 53%, so plan on cutting a load or two with either. What differs is the ceiling: the AC180 stops at what it ships with, while a DELTA 2 owner still has an expansion port to grow into.
Battery budget usedlower = more headroom
LOADΒ Β Fridge 150WΓ8h Β· Router + Modem 20WΓ8h Β· LED Lights (4 bulbs) 40WΓ6h Β· Phone Charger 15WΓ3h
SCN-03 Β· 8 hours Β· needs 320Wh
CPAP Overnight
Sleep therapy without interruption β the #1 medical use case
Either unit
A CPAP is about 40W for eight hours, so both of these cover the night at least twice over β capacity isn't the question here. The only published difference is fan noise, and it can't settle this: the AC180 is rated 40dB and the DELTA 2 50dB, but they are two makers' figures, each measured its own way. Neither settles which box is quieter at a bedside. Only the AC180 is still sold, so a new purchase here is just the AC180; the DELTA 2 is a used-market question.
Battery budget usedlower = more headroom
LOADΒ Β CPAP Machine 40WΓ8h
SCN-04 Β· 8 hours Β· needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
AC180
This is the row the AC180's extra battery actually decides. A 910Wh workday leaves it 69Wh in hand. The DELTA 2 comes up 40Wh short: its 1,024Wh nameplate clears the load, but after the flat 15% conversion allowance it has 870Wh to give. Trim one small load and it finishes too. The AC180 doesn't ask you to.
Battery budget usedlower = more headroom
LOADΒ Β Laptop 60WΓ8h Β· External Monitor 30WΓ8h Β· Router + Modem 20WΓ8h Β· Phone Charger 15WΓ2h
SCN-05 Β· 4 hours Β· needs 670Wh
Tailgate Party
Game day power for the crew
Either unit
Both carry a 670Wh game day with room left, 200Wh on the DELTA 2 and 309Wh on the AC180, so this one's a draw. On the day itself the DELTA 2 is the friendlier box, with six AC outlets to four and the lighter carry from the trunk. It's also no longer sold, so if you're buying for next season, the AC180 is the one you'll be hauling.
Battery budget usedlower = more headroom
LOADΒ Β Blender 400WΓ0.5h Β· LED TV (55") 80WΓ4h Β· Bluetooth Speaker 15WΓ4h Β· Phone Charger (Γ3) 45WΓ2h
SCN-06 Β· 24 hours Β· needs 4,685Wh
Van Life Daily
A full day of mobile living β the ultimate endurance test
Neither unit
Neither unit covers this scenario's 4,685Wh: the DELTA 2 comes up 3,815Wh short (about 19% covered), the AC180 3,706Wh (21%). 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
LOADΒ Β Mini-Fridge 150WΓ24h Β· Laptop 60WΓ4h Β· Phone Charger 15WΓ3h Β· LED Lights 40WΓ5h Β· Fan 75WΓ8h
The Load Test
RUNTIME = (Wh Γ 0.85) Γ· 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: AC180 runs 4.8h vs 4.2h.
$499 list Β· direct from BLUETTI
Planning for more than this? Describe your whole setup and get it sizedΒ β
Modeled from the spec record β same math as the tables below. Methodology
Runtime by appliance
Real-world runtime estimates for common appliances, modeled at 85% inverter efficiency.ΒΉ
Essentials
The basics you need runningscale 0β65.3hComfort & Convenience
Makes off-grid life actually enjoyablescale 0β13.1hHigh-Draw Appliances
These reveal the real limitsscale 0β1hΒΉ Runtime = (capacity Γ 0.85) Γ· 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 β see methodology.
Conclusion
October 11, 2026
Verdict: the AC180
Buy the AC180. EcoFlow no longer sells the DELTA 2, so the BLUETTI is the only one of the two you can buy new, and it would earn the pick on paper anyway: 1,152Wh to 1,024, a pack rated for 3,500 cycles against 3,000, on the same 1,800W inverter and 500W solar input. The cost against a DELTA 2 is the carry (35.3 lbs to 27), two fewer AC outlets, and a sealed case with no expansion. If the lighter body or the growth path is why the DELTA 2 was on your list, price EcoFlow's DELTA 3 before you buy. Otherwise, take the AC180.
Today the AC180 is $449, $50 under its typical $499. The verdict weighs typical prices, not today's. Prices checked 28 days ago.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of October 11, 2026. The links below open BLUETTI's current price.
$449.00 Β· direct from BLUETTI
down from $499 Β· 10% below usual
Last checked 28 days ago. Prices move β check before you buy.
Written by Ian Schneider, Solar & Off-Grid Tester Β· Station Arena Test Desk Β· Updated October 11, 2026
Black Friday Β· 26 days out
Price to beat:AC180 $449
The lowest we have recorded. A Black Friday price above it is a sale this unit has already had.
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Full specifications
α΅ Derived: price Γ· rated capacity. See the data behind our comparisons β
Comparison ToolAdd more power stations, side by sideOpen Tool βHow these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it β no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews β see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity Γ 0.85 inverter efficiency) Γ· 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 βClass ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews β 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 5β . Here, DELTA 2 rates 4.1/5 (50th percentile of 27 Everyday-class units), and AC180 rates 4.4/5 (65th percentile of 27 Everyday-class units).
How the class ranking is computed βTest Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
DELTA 2: 50dB Published
50dB is about as loud as moderate rainfall. The AC180 is rated 40dB β lower, but published by a different maker measuring its own way, so the two figures are not a like-for-like gap. For most people, fan noise around 45dB and up is where sleep starts to suffer.
AC180: What You Buy Is the Ceiling
The AC180 is sealed at 1,152Wh. No add-on battery, no second act. The DELTA 2 can take EcoFlow expansion batteries, which is worth something to people who already own one and nothing to anyone shopping new, because the base unit is no longer sold. If growing past 1,152Wh is in your plans, the AC180 is the wrong box, and EcoFlow's DELTA 3 is where the expandable line continues.
AC180: Power Lifting to 2,700W
The AC180 has BLUETTI's Power Lifting mode, which runs a resistive appliance rated up to 2,700W from its 1,800W inverter. It does that by delivering less power than the appliance asks for, not more than the inverter has: the heater still works, it just heats more slowly. Two things follow. BLUETTI scopes the mode to purely resistive loads β a heater, a kettle, an incandescent lamp β so it does nothing for a fridge compressor, a pump or a power tool; for motor loads the figure to read is the AC180's separate 2,700W surge peak, not this one. And it is not a reason to size down, because running a load that big from 1,152Wh is a short session either way. Genuinely useful if a heater or a kettle is why you're buying; beside the point otherwise. The DELTA 2 publishes no equivalent.
Warranty: Same Term, Different Fine Print
Both records carry five years. On the AC180 that's BLUETTI's conditional maximum: up to 5 years, with registration or a direct purchase, and a shorter term through resellers, so buy direct or register it the day it arrives. On the DELTA 2, EcoFlow's 5-year term is the clock current owners should watch, because EcoFlow offers no parts or service once a unit is out of warranty.
Full record above β the Test Desk pick is the AC180.
Check AC180 price βOwnership Analysis
What happens after you buy β 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
β warranty ends Β· Reaching the cycle rating means ~80% capacity remains β degraded, not dead.
Analyst note
The DELTA 2 is no longer sold, so there is no price to work its cost per kWh from, and this comparison doesn't quote one. On what you can actually buy today, the AC180 works out at $0.12/kWh over its rated life. If you already own the DELTA 2, the hardware comparison still holds: over its rated life the DELTA 2 delivers about 3,072 kWh and the AC180 about 4,032 kWh.
Brand trust
EcoFlow
Ecosystem
Largest in portable power β 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 β 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 β Reddit r/Ecoflow_community (~31K members), multiple Facebook groups, and an official community forum
App experience
Rated 4.6/5 iOS (~8,400 ratings) Β· 4.2/5 Android (~17,000 ratings)
Unique strength
Fastest-charging technology (X-Stream), deepest product ecosystem, and most active innovation cadence. At the top of the range sit two whole-home paths: the TITAN line, one 5 kWh unit that grows to 30 kWh, and the DELTA Pro Ultra platform, which stacks batteries and inverters further β flagship paths, not line-wide features.
Worth knowing
Tested subscription paywalls for advanced app features in early 2025 before community backlash paused the plan. No parts or service offered out of warranty.
BLUETTI
Ecosystem
One of the broadest lineups β 15-20+ models from budget (AC2A) to flagship portable (Apex 300, 2764.8Wh). 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 β Reddit r/bluetti has a dedicated community. Second-largest after EcoFlow in engagement.
App experience
Rated 4.5/5 iOS and Android β tied for best app experience in the category. V3.0 UI redesign was well-received.
Unique strength
Among the best capacity-to-price ratios available β several Elite and Apex units are the lowest $/Wh in the catalog. Widest product diversity including industry-firsts like sodium-ion cold-weather units and dual solar+alternator vehicle hubs. LFP across the rest of the range, though rated cycle life spans 2,500 (EB3A) to 6,000, and it varies WITHIN the Elite range rather than tracking it β the Elite 300 and Elite 200 V2 are rated 6,000 while the Elite 30 V2, Elite 10 Mini, Elite 320 and Elite 400 are rated 3,000+ and the Elite 100 V2 4,000+, so check the specific model. Dual-voltage (120V/240V) in flagships.
Worth knowing
Customer support inconsistency is the #1 risk factor. Older/discontinued units may become unrepairable β no spare parts policy for some models. Some reports of erratic communication from support agents.
Analyst note
With the DELTA 2 out of EcoFlow's range, the brand question splits by reader. If you own one, EcoFlow's support record is what matters: replacement experiences run from hassle-free to long waits, and the company offers no parts or service once the warranty ends, so keep your proof of purchase. If you're buying the AC180, BLUETTI's support is the most inconsistent in the space on our brand record, and buying direct from BLUETTI tends to go better, which is also the route that gets its warranty to the full term.
Growth path
DELTA 2
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit β useful if your needs may climb past 1,024Wh.
Accepts up to 500W of solar. Suitable for a 1-2 panel setup.
Generous port selection supports complex multi-device setups.
Expansion batteries are EcoFlow-specific. You're investing in the EcoFlow ecosystem.
AC180
FIXED CAPACITYFixed at 1,152Wh, with no expansion β 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.
Adequate ports for most setups, but heavy users may want a power strip.
Realistic full solar rechargeat 70% of rated panel output β see methodology
Analyst note
Growth only counts if you can still buy in, and the DELTA 2 is no longer sold (EcoFlow points owners to the DELTA 3). That leaves the AC180: it is sealed at 1,152Wh, so buy the size that covers you now. The DELTA 2's expandability still matters if you already own one, but it isn't a reason to pick it over the AC180.
What Owners Report
Patterns from published owner reports and long-term reviews β every claim cited to its source below.
EcoFlow DELTA 2
Field coverage on the DELTA 2 is deep and consistent. A long-term reviewer who ran it through outages, camping trips and home-office days credited fast charging, a dependable LiFePO4 pack and the expansion optionA3, and our research found reviewer consensus on reliabilityA0. That record is why the unit is still worth comparing after leaving EcoFlow's range.
The recurring complaint is the fan. It kicks in above about 120W and holds roughly 48-55 dB at full loadA1, and fast charging sounds like a gaming laptop until you lower the charge rate in the appA2. EcoFlow said a firmware fix was comingA4; that report is undated, so treat the fix as unconfirmed.
βWhen charging at 1200W the fans sound like a gaming laptop, though you can lower the charging speed in the app to silence it.β
Sources
portablepowerlab.com
BLUETTI AC180
Reviewers keep landing on the same word for the AC180: value. It's described as the most raw capacity and power for the money in its class rather than the lightest or smartestB4, built on LiFePO4 cells rated for 3,500-plus cycles to 80% and backed by a 5-year warrantyB3.
The caveats are physical. One reviewer named the weight their biggest frustration when moving it, with coverage putting it at roughly 35-37 lbs against our 35.3 listingB2B0. Fan reports split: some find it quiet from a few feet, others call it aggressive while charging, and a silent charging mode trades speed for quietB1.
βFan noise draws mixed reports β some find it fairly quiet from a few feet, others call the fans aggressive and loud, especially during charging; a silent charging mode caps the noise by limiting charge speed.β
Sources
outdoorgearlab.com Β· storagereview.com Β· kenrockwell.com Β· voltagebasics.com Β· bluettipower.com Β· backuppowerhub.com Β· solarwithwatts.com Β· pcworld.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
- Fan noise under moderate-to-high load is the dominant, repeatedly-cited complaint; the fan spins up above ~120W. [DELTA 2 Β· 3 entries]
- Best-in-class value and capacity-per-dollar are the consistent praise; the weight and aggressive fans under load are the recurring caveats. [AC180 Β· 2 entries]
- A1
βFans trigger at anything above 120 watts; at maximum load (1,500β1,800W) they run continuously at ~48β55 dB. Powering medical equipment above 120W in a bedroom means listening to the fans or running an extension cable out of the room.β
portablepowerlab.com β EcoFlow Delta 2 Review: 6 Months of Real Use; PCWorld β EcoFlow Delta 2 review Β· 2026 Β· [negative]
- A2
βWhen charging at 1200W the fans sound like a gaming laptop, though you can lower the charging speed in the app to silence it.β
PCWorld β EcoFlow Delta 2 power station review Β· 2026 Β· [mixed]
- A3
βAfter 18 months of real-world testing through multiple power outages, camping trips, and daily home-office use, the unit earned recognition for fast charging, reliable LiFePO4 battery chemistry, and expandability.β
portablepowerlab.com β EcoFlow Delta 2 Review: 6 Months of Real Use Β· 2026 Β· [positive]
- A4
βEcoFlow officials indicated they plan to address the fan noise in an upcoming firmware update, as they have for other models after release.β
portablepowerlab.com β EcoFlow Delta 2 Review Β· 2026 (dated claim β may be partially addressed) Β· [mixed]
- B1
βFan noise draws mixed reports β some find it fairly quiet from a few feet, others call the fans aggressive and loud, especially during charging; a silent charging mode caps the noise by limiting charge speed.β
outdoorgearlab.com / storagereview.com β BLUETTI AC180 review Β· 2025-2026 Β· [mixed]
- B2
βAt roughly 35-37 lbs it's heavy for its class β one reviewer named the weight their biggest frustration when moving it around.β
kenrockwell.com / voltagebasics.com β AC180 review Β· 2025-2026 Β· [negative]
- B3
βQuality LiFePO4 cells rated for 3,500-plus full cycles before capacity degrades to 80%, backed by a 5-year warranty.β
bluettipower.com / backuppowerhub.com β AC180 review Β· 2025-2026 Β· [positive]
- B4
βThe definition of bang for buck β not the lightest or smartest, but the most raw power and capacity for the price; widely called the best value in the mid-range at around $499.β
solarwithwatts.com / pcworld.com β BLUETTI AC180 review Β· 2025-2026 Β· [positive]
Research compiled October 11, 2026.
What Owners Actually Report
Drawn from 205 comments on independent review channels β not from retailer reviews, which skew to the first week of ownership. Each line is our summary of one commenter's claim, linked to the original. We record what they said, including where it contradicts the spec sheet.
EcoFlow DELTA 2
224 claims from 155 comments Β· 178 from owners Β· 60 with figures
- Runtime
- 32 Β· 13% negative
- Price & value
- 38 Β· 4% negative
- Charging
- 17 Β· 23% negative
- Durability
- 22 Β· 67% negative
- Warranty & support
- 22 Β· 59% negative
What owners complain about
Ignores solar unless he unplugs it from the wall, so he switched to the AC180.
Solar inputowner63 agreedsource β
His Delta 2 went bad three months after purchase and EcoFlow agreed it was defective.
Durabilityownerafter 3 months236 agreedsource β
Past 30 days the five-year warranty only gets a refurbished unit covered for 30 days.
Warranty & supportowner236 agreedsource β
What owners praise
DELTA 2 plus extra battery and 600W solar cost ~$1200 and paid for itself in under 2 years in California.
Price & valuemeasuredowner736 agreedsource β
Batteries still hold 98%+ capacity, ahead of the 80%-at-10-years warranty curve.
Durabilitymeasuredowner736 agreedsource β
Gets 180-190W into it from a 100Ah LiFePO4 via XT60i cable, no converter needed.
Chargingmeasuredowner106 agreedsource β
BLUETTI AC180
77 claims from 50 comments Β· 53 from owners Β· 20 with figures
- Price & value
- 17 Β· 10% negative
- Solar input
- 8 Β· 7% negative
- Size & weight
- 6 Β· 55% negative
- Runtime
- 4 Β· 38% negative
- Other
- 6 Β· 70% negative
What owners complain about
Is 30% larger and 25% heavier than the Anker, which the comparison chart never mentioned.
Size & weightmeasuredowner198 agreedsource β
The AC inverter eats 22W on its own, his major disappointment with the unit.
Idle drainmeasuredowner18 agreedsource β
Low-wattage loads get about 50% less runtime; a 700Wh/day fridge gets ~20 h, not 1.5 days.
Runtimemeasuredowner18 agreedsource β
What owners praise
BLUETTI's eBay refurb units are near-new with full warranty at 50-60% under MSRP.
Price & valuemeasuredowner56 agreedsource β
1800W and 1152Wh at 30 lbs is his current sweet spot for moving between house and camper.
Size & weightmeasuredowner42 agreedsource β
Pulled 390W from a 400W panel into the AC180; calls it a perfect fit.
Solar inputmeasuredowner17 agreedsource β
Claims are weighted by how specific they are, whether the commenter owns the unit, and how many readers agreed. Comments that mention a product under a rival's review count for more, because the commenter had no reason to be there. This is what buyers report, not our test results β for measurements we ran ourselves, see the methodology.
Who Should Buy Which
Buy the DELTA 2 if youβ¦
- βYou already own a DELTA 2 and it covers your loads. Keep it: an AC180 adds a sliver of capacity and more weight, not a new class of capability.
- βYou own a DELTA 2 and need more runtime. Its expansion port is the direct route, rather than a second box.
- βYou liked the DELTA 2 for its weight or its growth path. That's EcoFlow's DELTA 3 now, the like-for-like replacement, so put it beside the AC180 before you buy.
Buy the AC180 if youβ¦
- βYou're buying a new station for home backup or a desk, and it will mostly stay put, so its extra pounds rarely leave the floor.
- βYour workday on battery runs near 910Wh. The AC180 clears it with room to spare, where the DELTA 2 comes up short.
- βYou run a CPAP. 979Wh usable covers a 320Wh night about three times over, so one missed recharge isn't an emergency.
If neither fits
Anyone planning to ride out a full eight-hour outage with a fridge running (1,645Wh in our scenario) or to live in a van (4,685Wh a day). Both boxes fall short by hundreds to thousands of watt-hours, so close this tab and shop a larger station, ideally one that takes expansion batteries.
The Bottom Line
Buy the AC180. The DELTA 2 is out of EcoFlow's range, and the BLUETTI is the only one of these two you can buy new, which would settle it even if the specs disagreed. They don't: the AC180 carries the bigger, longer-rated battery, and on a full remote workday that's the difference between finishing and rationing.
The catch is the weight and the sealed case. If you carry the box every weekend or expect to outgrow it, take one look at the DELTA 3 first. Everyone else: get the AC180 and close the other tab.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the EcoFlow DELTA 2 discontinued?
Yes. EcoFlow no longer sells the DELTA 2, and its store page forwards to the DELTA 3, which EcoFlow positions as the like-for-like replacement. The specs on this page still hold for anyone who owns one, but we don't recommend it as a new purchase.
EcoFlow DELTA 2 or BLUETTI AC180: which should I buy?
The AC180, since it's the one still on sale. It also holds more, 1,152Wh to 1,024, with a pack rated for 3,500 cycles against 3,000, on the same 1,800W inverter. If the DELTA 2 appealed for its lighter 27 lb body or its expansion batteries, compare the AC180 against EcoFlow's DELTA 3 instead.
I already own a DELTA 2. Is the AC180 an upgrade?
Not really. It has the same 1,800W output, the same 2,700W surge and the same 500W solar input, with a battery 128Wh bigger, in exchange for 8.3 more pounds, two fewer AC outlets and no expansion. If you need more runtime, your DELTA 2's expansion port is the more direct fix.
Which is quieter, the DELTA 2 or the AC180?
The AC180 carries the lower published noise rating, but EcoFlow and BLUETTI don't measure the same way, so the ratings aren't a gap you can count on hearing. Reviewers report the DELTA 2's fans start above about 120W, and both units get loud when fast-charging and quiet down on a slower charge setting.
Can you add a battery to the BLUETTI AC180?
No. The AC180 is sealed at 1,152Wh, so buy it for the loads you have now. If you want to add capacity later, the DELTA 3 is EcoFlow's expandable replacement for the DELTA 2 and the one to compare.
Where to buy
EcoFlow DELTA 2
No longer sold
BLUETTI AC180Pick
$449.00
$449.00 Β· direct from BLUETTI
down from $499 Β· 10% below usual
Last checked 28 days ago. Prices move β check before you buy.
Prices may vary by retailer and are subject to change.