Head-to-head test
EcoFlow DELTA 2 vs BLUETTI Elite 100 V2
Only one of these is still sold, and it's the one that takes twice the solar input on the same 1,024Wh battery; the expansion port the DELTA 2 offered retired with it.
Full profiles: EcoFlow DELTA 2 β Β· BLUETTI Elite 100 V2 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, so of the two boxes on this page, only the BLUETTI Elite 100 V2 can be bought new. That settles the recommendation before a single spec does: take the Elite.
The specs don't argue with it. Same 1,024Wh battery, same 1,800W inverter, and the Elite adds twice the solar input (1,000W to 500W), a 4,000-cycle rating against 3,000, a β€10ms switchover ceiling against β€20ms, and 2 fewer pounds to carry. If you were hoping the retired unit was secretly the better one, it mostly wasn't.
Mostly. The DELTA 2 had an expansion port, six AC outlets to the Elite's four, and a published 2,700W surge rating where the Elite's record lists nothing above 1,800W. If those are why it made your shortlist, EcoFlow's DELTA 3 is the tab to open next. If you already own a DELTA 2, nothing here makes it obsolete.
What the Numbers Reveal
Each conclusion stated first β the numbers behind it on one line, the full analysis below.
solar input
That gap lands hardest in the outage row, where both run dry with 775Wh of the night still to go. At rated maximum the Elite wins that 775Wh back in under an hour of sun; the DELTA 2 needs about an hour and a half (775 Γ· 500). Hitting either ceiling takes a serious panel array, but past 500W of panels the DELTA 2 simply ignores the rest, while the Elite keeps using them.
Elite 100 V2: 1,000W max solar input; DELTA 2: 500WBoth hold 1,024Wh8-Hour Blackout: the 1,645Wh load leaves both 775Wh short
Why it mattersAnyone planning to ride out outages or long trips on solar should read the Elite's input ceiling as the headline spec, not a footnote.
A compressor's start-up spike is exactly the load where published headroom matters, and the live unit's record doesn't publish any. Every load profile on this page starts on both units, the heaviest peaking at 400W, so this only bites when a fridge or a pump is the reason you're buying.
DELTA 2: 1,800W continuous, 2,700W published surgeElite 100 V2: 1,800W continuous, no published surge figureElite Power Lifting: runs resistive appliances rated up to 2,700W by delivering less power than they ask for
Why it mattersFridge and well-pump buyers should check that appliance's start-up demand against the Elite before committing; everyone else will never see this gap.
rated cycles
Past year five is where the DELTA 2's retirement starts to cost something. EcoFlow offers no parts or service once cover ends, on a model it no longer sells, so a leftover DELTA 2 is the shorter-rated pack with support that stops at the warranty. BLUETTI has no spare-parts policy on some models either, but the Elite is the current one, with more rated life to spend before anyone has to ask.
Elite 100 V2: 4,000 cycles, 4,096 lifetime kWh; DELTA 2: 3,000 cycles, 3,072 lifetime kWhCycled daily: 11 years vs 8.2Both carry 5-year terms; EcoFlow offers no parts or service out of warranty
Why it mattersIf leftover DELTA 2 stock is tempting you, weigh it as a 3,000-cycle battery whose maker stops servicing it when the warranty runs out.
Neither carries a full workday alone, so the desk question is really about the moment the grid drops. β€20ms sits right at the line where fussy desktop power supplies balk; β€10ms is the safer class on paper. And a 140W USB-C port can charge a big laptop without its brick, which is how four outlets end up being enough.
Elite: β€10ms switchover ceiling; DELTA 2: β€20msElite: 4 AC outlets, USB-C up to 140W; DELTA 2: 6 AC outlets, USB-C up to 100WRemote Workday: both come up 40Wh short of 910Wh
Why it mattersHome-office buyers protecting a desktop with unsaved work get the better-rated switchover on the Elite; anyone with six AC plugs to fill will want a power strip.
The specific dimensions that decide these two units β everything else is a tie.
What the Specs Don't Tell You
Selected because: The switchover, cycle-life and Power Lifting cards hold the real differences between two units with the same battery and inverter.
rated cycles
Set aside the noise ratings, which are two makers measuring two different ways, and the cards that remain tilt toward the Elite: a β€10ms switchover ceiling to the DELTA 2's β€20ms, and 4,000 rated cycles to 3,000. Warranty is a wash at 5 years each, with the Elite's term depending on registering it or buying from BLUETTI direct.
The card to read twice is Power Lifting. Its 2,700W looks like the DELTA 2's surge figure wearing a BLUETTI badge, and it isn't. It lets a heater rated past the inverter run slowly; it does nothing for a compressor's start-up kick, and the Elite's record publishes no surge figure at all. That's the one place the retired unit's spec sheet says more than the live one's.
Your Life, Your Pick
Selected because: Identical 1,024Wh batteries tie every row, so the solar input and weight that break those ties are worth seeing.
Same 1,024Wh, same 870Wh usable after the derate, same 1,800W inverter: every row comes out identical to the percent, which makes for a slightly comic table. The CPAP night and the tailgate pass on both, the workday misses by 40Wh on both, and the blackout, the camping weekend and van life aren't close for either.
So the ties break on what the table doesn't count. The Elite takes twice the solar input, which turns the 775Wh blackout shortfall into a sunny-morning problem instead of a dark-evening one, and it's 2 lbs lighter carried from the trunk. The DELTA 2's two extra AC outlets would have helped at the tailgate. It just isn't on the shelf.
Growth Path
Selected because: Expansion was the DELTA 2's one structural edge, and it left the market with the unit.
solar input
The DELTA 2's expansion port was the one thing on its spec sheet the Elite couldn't answer, and it retired along with the unit. For a new buyer the question is gone. The Elite is sealed at 1,024Wh, so buy it only if 1,024Wh covers you today, and treat every row it misses on this page as a row it will always miss.
If growth is the whole point, the comparison you want is the Elite against EcoFlow's DELTA 3, or a bigger station outright. If you already own a DELTA 2, its expansion route is still yours; confirm the add-on battery you want is still sold before you plan around it.
Brand Trust
Selected because: With the EcoFlow unit retired, the brand question is how BLUETTI supports the Elite and where EcoFlow sends you next.
EcoFlow's lineup is the deeper of the two, but on this page it only matters as the road to the DELTA 3. The live question is BLUETTI's support, which our brand profile rates the most inconsistent in the category: heavily email-based, with better outcomes when you buy direct from BLUETTI's own site.
Buying direct is also how the Elite gets its full 5-year term, so one decision fixes both. Neither maker is generous after the warranty: EcoFlow offers no parts or service once it ends, and BLUETTI has no spare-parts policy on some models. Plan on five covered years and treat everything after as the battery's business.
Strengths & trade-offs
EcoFlow DELTA 2
Strengths
- Solid all-rounder with standard specs.
Trade-offs
- βShorter-lived battery β rated for 3,000 charge cycles vs the Elite 100 V2's 4,000, so it wears out sooner.
BLUETTI Elite 100 V2
Strengths
- +Lighter by 2 lb
- +Faster solar charging
- +Rated for 4,000 charge cycles β much longer battery lifespan
Trade-offs
- βSealed capacity β the DELTA 2 can add batteries to grow past 1,024Wh; this one can't.
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
A 2,100Wh weekend is more than twice what either holds, and both come up 1,230Wh short. Neither wins it. What separates them is the refill between days: the Elite accepts twice the solar input, so a sunny afternoon puts back more of what Saturday took. The DELTA 2 isn't sold anymore, which settles the rest.
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 lasts the night: the 1,645Wh load leaves both 775Wh short, so each covers a little over half. Same battery, same shortfall, and the tiebreak is the sun. The Elite takes up to 1,000W of solar to the DELTA 2's 500W, so with enough panels it wins back that 775Wh in under an hour where the DELTA 2 needs about an hour and a half. Plan around this row; don't expect either to close it alone.
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
Both carry a 40W CPAP through an eight-hour night with about 550Wh to spare, so capacity isn't the question. The row goes to the Elite on its lower published noise rating, and with the DELTA 2 retired it's also the only one of the two you can put on the nightstand new. The makers rate noise their own ways, so read it as a lean, not a promise of silence.
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
Neither unit
Both come up 40Wh short of the 910Wh workday, so neither quite finishes the shift alone. Trim one device and either does. The Elite's 140W USB-C port can charge a big laptop directly, which is the easiest trim to make.
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 run game day with about 200Wh left over, and both start the 400W peak. Call it a dead heat on the battery. The Elite is 2 lbs lighter to carry from the trunk; the DELTA 2 had two more AC outlets for the crowd with too many plugs, which would matter more if you could still buy one.
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 Elite 100 V2 3,815Wh (19%). 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
Dead heat β both run this 205W load for roughly 4.2h. Pick on price, weight, or ports.
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 0β58hComfort & Convenience
Makes off-grid life actually enjoyablescale 0β11.6hHigh-Draw Appliances
These reveal the real limitsscale 0β0.9hΒΉ 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 Elite 100 V2
Buy the BLUETTI Elite 100 V2. EcoFlow no longer sells the DELTA 2 and points buyers to the DELTA 3, so the Elite is the only one of these two you can buy new, and it's the better box anyway: the same 1,024Wh battery and 1,800W inverter, twice the solar input (1,000W to 500W), a 4,000-cycle rating against 3,000, a β€10ms switchover ceiling against β€20ms, and 2 lbs less to carry. What it gives up is real: no expansion port, four AC outlets to six, and no published surge figure where the DELTA 2 listed 2,700W. If one of those is the reason you're shopping, compare the Elite against the DELTA 3 instead. If you already own a DELTA 2, keep it.
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.
$499.00 Β· direct from BLUETTI
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:Elite 100 V2 $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 Elite 100 V2 rates 4.8/5 (88th 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 Elite 100 V2 is rated 30dB 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.
Elite 100 V2: Fixed Capacity
The Elite 100 V2 is sealed at 1,024Wh, and that is the ceiling. Normally the counterpoint would be that the DELTA 2 can add expansion batteries, but that isn't a live option here: the DELTA 2 is no longer sold, and EcoFlow points owners to the DELTA 3. For a new purchase the expansion question doesn't arise between these two, so the Elite 100 V2's fixed 1,024Wh is simply what you get.
Elite 100 V2: Power Lifting to 2,700W
The Elite 100 V2 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 Elite 100 V2's separate 3,600W surge peak, not this one. And it is not a reason to size down, because running a load that big from 1,024Wh 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.
Surge Power: Inverter Quality Indicator
The Elite 100 V2 has a 2Γ surge-to-continuous ratio vs the DELTA 2's 1.5Γ, and the higher absolute ceiling with it β 3,600W against 2,700W. At 2Γ it clears the 2Γ rule of thumb for absorbing motor startups β fridges, AC compressors and power tools briefly draw 2-3Γ their rated wattage. What decides whether a given motor starts is the ceiling, not the ratio: the DELTA 2 still surges to 2,700W, so check the startup draw of the heaviest thing you plan to run against that figure rather than assuming it trips.
β€10ms vs β€20ms: Both Are Ceilings
Both list a UPS mode, and both numbers are maximums rather than measurements. The Elite's β€10ms rating is the class desktop PCs and routers should ride through on paper. The DELTA 2's β€20ms is fine for routers and most electronics, and sits right at the line where the fussiest PC power supplies give up. If the thing on the other end of the cord is a desktop with unsaved work, the Elite's rating is the one to want.
Five Years Each, Different Strings
Both records carry a 5-year term, so cover doesn't split them. On the Elite 100 V2, five years is the maximum: it depends on buying from BLUETTI direct or registering the unit, and reseller purchases carry a shorter term. The DELTA 2's five years is stated plainly, but EcoFlow offers no parts or service once it ends, on a model it no longer sells. If you're buying a leftover DELTA 2, ask the seller how a claim would be handled before you count on that cover.
A Thousand More Cycles, Nearly Three More Years
The Elite is rated for at least 4,000 cycles to the DELTA 2's 3,000, which works out to 4,096 lifetime kWh against 3,072. Cycled daily, that's 11 years against 8.2; at two cycles a week, 38.5 against 28.8. Both outlast their 5-year warranties at daily use, but the Elite is the one with real headroom past it.
Full record above β the Test Desk pick is the Elite 100 V2.
Check Elite 100 V2 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 Elite 100 V2 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 Elite 100 V2 about 4,096 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 retired, EcoFlow's deeper lineup matters here only as the road to the DELTA 3. The live brand question is BLUETTI's support, the most inconsistent in the category and better when you buy direct from BLUETTI's own site, which is also what unlocks the Elite's full 5-year term. EcoFlow offers no parts or service out of warranty, and BLUETTI has no spare-parts policy on some models, so neither is a reason to expect help past year five.
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.
Elite 100 V2
FIXED CAPACITYFixed at 1,024Wh, with no expansion β so size it for your needs up front rather than planning to add capacity later.
Accepts up to 1,000W of solar. Enough for a serious multi-panel array.
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 Elite 100 V2: it is sealed at 1,024Wh, 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 Elite 100 V2.
What Owners Report
Patterns from published owner reports and long-term reviews β every claim cited to its source below.
EcoFlow DELTA 2
The DELTA 2's field record is long and mostly kind. A long-term test through power outages, camping trips and daily home-office use credited it with fast charging, dependable LiFePO4 cells and its expansion optionA3, and our research found reviewer consensus steady on reliability and valueA0.
Fan noise is the complaint that keeps coming backA1A2. The fans kick in above about 120W and run around 48β55 dB near full load, enough that powering bedroom medical gear past that draw means listening to them or running a cord out of the roomA1. Charging at 1,200W sounds like a gaming laptop, though the app can turn the charge rate down to quiet itA2. EcoFlow said it planned a firmware fixA4; our record doesn't show whether it shipped, and with the unit retired, this is now a report on what you'd be getting as leftover stock.
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 Elite 100 V2
The Elite 100 V2 is a 2026 release with plenty of reviewer coverage and a short owner recordB0. Reviewers consistently praise the solar side: one of the faster chargers in its class, with a full refill in about an hour at its 1,000W inputB2, and a 30-day test that called its portability-to-power ratio the best in the 1,000Wh class while it held its rated 1,800WB5.
Quiet is the other theme, with a catch worth knowing. Some reviewers never heard the fans even while it ran a large heater, but the sub-30 dB claim applies only in Silent mode, which caps charge and discharge power, and Turbo mode is noticeably louderB1. The build gets good marks, with nothing rattling insideB3. The one negative thread is a minority of reports of charging failures and a display stuck at zeroB4, from sources our researcher couldn't pin to this exact model, so treat it as a reason to buy where returns are easy rather than as a known fault.
βReviewers found it remarkably quiet in practice β some never heard the cooling fans even while it powered a large heater. The sub-30 dB claim only applies in Silent mode, which caps charge/discharge power; Turbo mode is noticeably louder.β
Sources
thesolarlab.com Β· trustedreviews.com Β· notebookcheck.net Β· outdoortechlab.com Β· backuppowerhub.com Β· popsci.com Β· voltagebasics.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]
- Fast solar charging, quiet real-world operation, and best-in-class portability-to-power are the standout praise; occasional charging-failure reports are the main negative. [Elite 100 V2 Β· 3 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
βReviewers found it remarkably quiet in practice β some never heard the cooling fans even while it powered a large heater. The sub-30 dB claim only applies in Silent mode, which caps charge/discharge power; Turbo mode is noticeably louder.β
thesolarlab.com / trustedreviews.com β BLUETTI Elite 100 V2 review Β· 2026 Β· [positive]
- B2
βOne of the faster solar chargers in the 1kWh class β 1,000W solar input with built-in MPPT enabling a full charge in about an hour, faster than most equivalent-size units.β
notebookcheck.net / outdoortechlab.com β Elite 100 V2 review Β· 2026 Β· [positive]
- B3
βDurable LiFePO4 cells rated up to 4,000 cycles for over a decade of use; solid craftsmanship, with nothing rattling around inside when moved.β
backuppowerhub.com / popsci.com β Elite 100 V2 review Β· 2026 Β· [positive]
- B4
βSome customer reports mention charging failures and the display occasionally showing zero charge.β
voltagebasics.com / BLUETTI community β Elite 100 V2 owner reports Β· 2026 Β· [negative]
- B5
βAfter 30 days of testing, it delivers the best portability-to-power ratio in the 1000Wh class β comfortably provides its rated 1,800W output and charges quickly, with strong solar specs.β
outdoortechlab.com / popsci.com β Elite 100 V2 review Β· 2026 Β· [positive]
Research compiled October 11, 2026.
What Owners Actually Report
Drawn from 173 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 Elite 100 V2
31 claims from 18 comments Β· 24 from owners Β· 6 with figures
- Runtime
- 4 Β· 73% negative
- Durability
- 4 Β· 64% negative
- Solar input
- 4 Β· 0% negative
- Warranty & support
- 4 Β· 94% negative
- Other
- 3 Β· 61% negative
What owners complain about
Only 24 hours running a 28W device off DC; BLUETTI says that is within spec.
Runtimemeasuredowner5 agreedsource β
After sitting 2 weeks it threw 8 overvoltage error codes, AC would not run, unit needed replacement.
Durabilityowner6 agreedsource β
Support's runtime math assumed inverter losses even when running straight off DC.
Warranty & supportowner5 agreedsource β
What owners praise
Elite 100 V2's edge is 1000W solar input at 25 pounds for $395.
Solar inputmeasuredowner8 agreedsource β
BLUETTI's products are great; he went EB3A to AC70 to Elite 100 V2.
Build qualityowner3 agreedsource β
Has lived 3 months without grid power running a fridge at 111W, a scooter and two phones.
Runtimemeasuredownerafter 3 monthssource 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. The Elite's gains are solar input and cycle rating, not capacity, and the two batteries are the same 1,024Wh.
- βYou own one and want more capacity: its expansion port is the upgrade route the Elite never had. Confirm the add-on battery is still sold before you plan around it.
- βYou wanted the EcoFlow version of this unit, new: that's the DELTA 3, EcoFlow's named replacement. Compare it against the Elite rather than hunting down leftover DELTA 2 stock.
Buy the Elite 100 V2 if youβ¦
- βYou're charging from panels on a trip or through an outage: 1,000W of solar input is double the DELTA 2's ceiling, so a big array actually gets used.
- βThere's a desktop PC on your desk with unsaved work on it: the β€10ms switchover ceiling is the safer UPS rating of the two.
- βA space heater or a kettle is on the list: Power Lifting runs resistive appliances rated up to 2,700W, slowly, and the DELTA 2 had no equivalent.
- βYou want one sealed 25 lb box and know 1,024Wh covers you: buy the size you need now, because there's no adding to it later.
If neither fits
Close the tab if you need a whole blackout night of loads (the 1,645Wh row), a full weekend off-grid (2,100Wh) or van life (4,685Wh): both are 1,024Wh units that come up short on all three, so shop a station with at least twice this capacity. Same if a fridge compressor is the main job and you want a published surge figure in hand, because the live unit here doesn't print one.
The Bottom Line
Take the BLUETTI Elite 100 V2. The DELTA 2 has left EcoFlow's range, and even on paper it was the slower one to refill from the sun, rated for fewer cycles and slower to switch over, on the same 1,024Wh and 1,800W.
Its expansion port and published surge rating were real, and if they're what you need, the DELTA 3 is the page to open next. If 1,024Wh is the battery you need and the sun is part of the plan, the Elite is the one on the shelf and the better box anyway. Go get it.
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 names as the replacement. The DELTA 2's specs on this page are still accurate, which helps if you own one or spot leftover stock, but it isn't a unit we'd steer a new buyer toward.
EcoFlow DELTA 2 or BLUETTI Elite 100 V2: which should I buy?
The Elite 100 V2. It's the one still sold, and it holds the same 1,024Wh and 1,800W as the DELTA 2 while taking 1,000W of solar to 500W and carrying a 4,000-cycle rating to 3,000. If you specifically need an expansion battery or a published surge figure, compare it against EcoFlow's DELTA 3 instead.
Can the BLUETTI Elite 100 V2 run a fridge?
Its record lists 1,800W continuous and publishes no surge figure above that, so there's no spec telling you how it handles a compressor's start-up kick. The 2,700W Power Lifting figure applies only to resistive loads like heaters and kettles and does nothing for a fridge. Every load profile on this page starts on it, the heaviest peaking at 400W, but if a fridge is the main job, check that appliance's start-up demand before you buy.
Can you add an extra battery to the Elite 100 V2?
No. It's sealed at 1,024Wh, so what you buy is the ceiling. The DELTA 2 accepted expansion batteries, but it's no longer sold; if an add-on battery path matters, EcoFlow's DELTA 3 is the replacement to look at, or buy a bigger station from the start.
Which is quieter, the DELTA 2 or the Elite 100 V2?
The Elite, on the evidence we have, with a catch. Some reviewers never heard its fans even under a large heater, but its sub-30 dB claim holds only in Silent mode, which caps charge and discharge power. The DELTA 2's fans kick in above about 120W and run around 48β55 dB near full load. The two makers don't measure their published ratings the same way, so don't treat the spec-sheet numbers as a gap you'll hear.
Related comparisons
Where to buy
EcoFlow DELTA 2
No longer sold
BLUETTI Elite 100 V2Pick
$499.00
$499.00 Β· direct from BLUETTI
Last checked 28 days ago. Prices move β check before you buy.
Prices may vary by retailer and are subject to change.