Head-to-head test
EcoFlow DELTA 2 vs BLUETTI AC70P
Only one of these is still sold, and the AC70P earns the pick as long as nothing you run tops 1,000W and 864Wh is all the battery you'll ever want.
Full profiles: EcoFlow DELTA 2 → · BLUETTI AC70P →
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
Spec deltas
EcoFlow no longer sells the DELTA 2; its store page now forwards to the DELTA 3. That leaves the BLUETTI AC70P as the only unit on this page you can buy new, and it's our pick, with one condition worth reading before you click.
On paper the retired unit is the bigger one: 1,024Wh against 864Wh, 1,800W of continuous output against 1,000W, and room to add EcoFlow expansion batteries where the AC70P is sealed. The AC70P answers with a lighter body, 22.5 lb to the DELTA 2's 27, and the same 3,000-cycle battery rating. Those specs still matter if you own a DELTA 2 or turn up leftover retailer stock. They just can't be the recommendation.
The condition is output. Every scenario we model peaks at 400W or less, which the AC70P handles with most of its rating unused, and it runs a CPAP for two nights per charge. If your list includes something that pulls past 1,000W on its own, like a space heater on high, the AC70P is the wrong box, and the DELTA 3, EcoFlow's named replacement for the DELTA 2, is the one to look at.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
continuous output
Output isn't where the AC70P runs out; capacity is. The 1,800W advantage only earns its keep on a load that pulls past 1,000W by itself, such as a space heater on high or a full-size hair dryer. If one of those is on your list, the AC70P is the wrong box and the DELTA 3, EcoFlow's replacement for the DELTA 2, is the place to look.
AC70P: 1,000W continuous, 2,000W surgeDELTA 2: 1,800W continuous, 2,700W surgeHighest peak across the six modelled scenarios is 400W (Tailgate Party), and both units start and sustain every scenario's peak
Why it mattersIf nothing you plan to run draws more than 1,000W on its own, the retired unit's biggest spec advantage is one you'd never have used.
On a CPAP, capacity is a tie in disguise and the deciding spec is the fan beside your head. A 40W machine never crosses the 120W line where the DELTA 2's fans were found to startA1. The AC70P has only BLUETTI's own noise rating behind it, with no hands-on noise reports in our researchB1B3. It takes the CPAP row and it's the one you can buy, but its quiet is a claim until you've heard it at low load.
CPAP Overnight needs 320Wh in our model, about 40W for eight hoursUsable after the flat 0.85 factor: AC70P 734Wh, DELTA 2 870WhOne review found the DELTA 2's fans kick in above 120WA1
Why it mattersCPAP users buying new get two nights per charge from the AC70P, and should run it at the machine's draw for an evening before it moves onto the nightstand.
So the AC70P's ceiling is the real decision: 864Wh is what you'll have in year five. Where a job already brushes that ceiling, like the 910Wh Remote Workday the AC70P misses by 176Wh, the only fix on this box is a midday recharge. Its 500W solar input covers that in under an hour even at half rate, but no add-on battery ever will.
DELTA 2: accepts EcoFlow expansion batteriesAC70P: sealed at 864Wh with no expansion batteryB3DELTA 2 is no longer sold; EcoFlow points buyers to the DELTA 3
Why it mattersIf you expect your needs to grow past 864Wh, skip the AC70P and look at the DELTA 3; if they won't, the sealed box costs you nothing.
Buy it from BLUETTI directly and register it the day it arrives. That locks in the full five-year term and puts you in the better of BLUETTI's two support experiences. A marketplace listing can quietly cost you both.
AC70P warranty: up to 5 years, with registration or when bought direct from BLUETTI; reseller purchases carry a shorter termBLUETTI brand profile: support consistency is its biggest risk factor, and buying direct from BLUETTI's website tends to produce better support outcomes
Why it mattersAnyone about to buy the AC70P through a third-party seller should check the warranty term on that listing before paying.
The specific dimensions that decide these two units — everything else is a tie.
Your Life, Your Pick
Selected because: Four of the six jobs beat both units, so the two the AC70P can finish decide whether it fits you.
Four of the six scenarios beat both boxes, and finishing second in a loss is still a loss. A weekend camp at 2,100Wh, a blackout day at 1,645Wh and van life at 4,685Wh a day all need a bigger station, whichever of these you own. The Remote Workday is the near one: the DELTA 2 falls 40Wh short, the AC70P 176Wh.
The two jobs left are the ones a box this size is bought for, and the AC70P does both. It runs a CPAP two nights per charge and finishes a tailgate with 64Wh to spare. The DELTA 2 ends that tailgate with 200Wh, which is the honest measure of what its extra capacity buys: more slack on jobs both can already do.
What the Specs Don't Tell You
Selected because: The surge card is the AC70P's real limit, and the warranty card says where to buy it.
The surge card is the honest catch on our pick. A 2x ratio flatters the AC70P, but a compressor at switch-on asks for watts, not a multiple, and 2,000W is the lower ceiling of the two. If a fridge is why you're buying, check its startup draw against that number and ignore the ratio.
Noise and warranty both come down to fine print. Neither noise figure is a bench measurement, so they can't settle a bedroom question on their own. The AC70P's five years is a maximum that depends on buying direct or registering, which turns the warranty card into shopping advice.
Growth Path
Selected because: The DELTA 2's expansion path left the market with it, so the AC70P's sealed ceiling is the question that remains.
Expansion used to be the DELTA 2's trump card. With the unit gone from EcoFlow's range, it only matters to people who already own one, and for them it's a reason to keep it rather than trade down to a sealed 864Wh box.
For a new buyer the AC70P is a buy-once size. If 864Wh covers your load now with room left over, sealed costs you nothing. If you're already eyeing the ceiling, that's the signal to look at the DELTA 3 instead.
Brand Trust
Selected because: A new purchase here means BLUETTI's support, and buying direct is the fix for its weak spot.
With the DELTA 2 retired, the EcoFlow column describes the company behind its replacement more than anything you can buy on this page. The BLUETTI column is the one a purchase signs you up for, and its weak point is consistency: support is email-first and runs on China-timezone delays.
The practical answer matches the warranty card. Buy direct from BLUETTI and register the unit, since direct purchases tend to land in the smoother support experience and carry the full term. It's the last real decision once you've picked the box.
Strengths & trade-offs
EcoFlow DELTA 2
Strengths
- +Larger battery capacity
- +Higher AC output
Trade-offs
- –No major technical downsides compared to rival.
BLUETTI AC70P
Strengths
- +Lighter by 4.5 lb
Trade-offs
- –Weaker inverter (-800W) limits appliance compatibility.
- –Sealed capacity — the DELTA 2 can add batteries to grow past 864Wh; 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 · 2 nights · needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
Neither unit
Neither unit covers this scenario's 2,100Wh: the DELTA 2 comes up 1,230Wh short (about 41% covered), the AC70P 1,366Wh (35%). Treat this as partial cover — enough for the essentials in it, not the whole list.
Battery budget usedlower = more headroom
LOAD Phone Charger 15W×6h · LED Lights 40W×8h · Box Fan 75W×14h · CPAP Machine 40W×16h
SCN-02 · 8 hours · needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
Neither unit
Neither unit covers this scenario's 1,645Wh: the DELTA 2 comes up 775Wh short (about 53% covered), the AC70P 911Wh (45%). Treat this as partial cover — enough for the essentials in it, not the whole list.
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 carry a 40W CPAP through the night with plenty left: 414Wh in the AC70P after one night, 550Wh in the DELTA 2. Two nights fit in either and a third fits in neither, so the extra capacity buys no extra sleep. The AC70P takes the row on its lower published noise rating, which is a maker's figure rather than a bench test, and it's the only one of the two still sold.
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
Neither unit
A 910Wh day beats both. The DELTA 2 misses by 40Wh, close enough to trim on the day; the AC70P misses by 176Wh, which calls for a midday recharge rather than a trim. With 500W of solar input, even half that rate puts 176Wh back in under an hour.
Battery budget usedlower = more headroom
LOAD Laptop 60W×8h · External Monitor 30W×8h · Router + Modem 20W×8h · Phone Charger 15W×2h
SCN-05 · 4 hours · needs 670Wh
Tailgate Party
Game day power for the crew
DELTA 2
Both finish game day. The DELTA 2 ends it with 200Wh in hand to the AC70P's 64Wh, so it's the roomier tailgate box for anyone who already owns one. Shopping new, the AC70P does the same afternoon on a thinner margin and weighs 4.5 lb less on the walk from the trunk.
Battery budget usedlower = more headroom
LOAD Blender 400W×0.5h · LED TV (55") 80W×4h · Bluetooth Speaker 15W×4h · Phone Charger (×3) 45W×2h
SCN-06 · 24 hours · needs 4,685Wh
Van Life Daily
A full day of mobile living — the ultimate endurance test
Neither unit
Neither unit covers this scenario's 4,685Wh: the DELTA 2 comes up 3,815Wh short (about 19% covered), the AC70P 3,951Wh (16%). This is well outside what either unit is for; the right answer here is a larger station, not a choice between these two.
Battery budget usedlower = more headroom
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
For this load: DELTA 2 runs 4.2h vs 3.6h.
Planning for more than this? Describe your whole setup and get it sized →
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 0–58hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–11.6hHigh-Draw Appliances
These reveal the real limitsscale 0–0.9h¹ 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
October 11, 2026
Verdict: the BLUETTI AC70P
The DELTA 2 has left EcoFlow's range, so the recommendation goes to the one unit still sold: the AC70P. It covers the jobs a box this size is for. A CPAP runs two nights per charge, a tailgate finishes with charge to spare, and the busiest load in our scenarios uses 40% of its 1,000W rating. The catch is that 1,000W and 864Wh are permanent: the AC70P is sealed, and its surge ceiling is the lower of the two. If you need more output or a path to more battery, skip it for EcoFlow's DELTA 3. Otherwise buy the AC70P direct from BLUETTI and register 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 · direct from BLUETTI
Last checked 28 days ago. Prices move — check before you buy.
Written by Ian Schneider, Solar & Off-Grid Tester · Station Arena Test Desk · Updated October 11, 2026
Black Friday · 26 days out
Price to beat:AC70P $499
We have never seen it discounted, so any real cut would be a first.
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): RV Living, Home Backup, Food Truck.
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 2 rates 4.1/5 (50th percentile of 27 Everyday-class units), and AC70P rates 4.5/5 (68th percentile of 20 Compact-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.
Two Ratings, No Shared Bench
BLUETTI rates the AC70P at 45dB; EcoFlow's 50dB for the DELTA 2 is a ceiling under load. Our record doesn't say what load BLUETTI's figure describes, so the two numbers aren't the same kind of measurement and the difference between them isn't something you can count on hearing. If the box is going beside a bed, run it at your CPAP's draw for an evening before trusting either rating.
AC70P: What You Buy Is the Ceiling
The AC70P is sealed at 864Wh. That's the one weakness the DELTA 2 didn't share, and it no longer decides anything between these two: the DELTA 2 has left EcoFlow's range, so its expansion path only serves people who already own one. Size the AC70P for today's load with room to spare. If you already expect to outgrow it, EcoFlow's DELTA 3 is the route that keeps adding batteries on the table.
AC70P: Power Lifting to 2,000W
The AC70P has BLUETTI's Power Lifting mode, which runs a resistive appliance rated up to 2,000W from its 1,000W 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 — a heater, a kettle, an incandescent lamp — so it does nothing for a fridge compressor, a pump or a power tool; for motor loads the figure to read is the AC70P's separate 2,000W surge peak, not this one. And it is not a reason to size down, because running a load that big from 864Wh 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.
Bigger Ratio, Smaller Ceiling
The AC70P surges to 2,000W on a 1,000W rating, a 2x ratio; the DELTA 2 surges to 2,700W on 1,800W, or 1.5x. The ratio flatters the AC70P. A compressor at switch-on asks for a number of watts, not a multiple, and on that count the DELTA 2 swallows the bigger spike. Before you plug a fridge into the AC70P, check its startup draw against 2,000W.
Five Years on Both, With Conditions on One
Both records carry five years. On the AC70P that's the ceiling rather than the default: up to 5 years with registration or when bought direct from BLUETTI, and a shorter term through resellers. Buy direct or register it the day it arrives. The DELTA 2's five-year term is now a question only for people who already own one.
Full record above — the Test Desk pick is the AC70P.
Check AC70P price →Ownership 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 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 AC70P works out at $0.19/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 AC70P about 2,592 kWh. One thing to know reading the table: both carry the same 3,000-cycle rating, so the lifetime rows are sticker price and capacity in disguise — the wear horizon is identical and decides nothing here.
Brand trust
EcoFlow
Ecosystem
Largest in portable power — 12-15 models across DELTA Pro, DELTA 3, and RIVER 3 series, plus solar panels and smart home panels
Support
US-based phone/email/chat support (1-800-368-8604). Experiences are polarized — many report hassle-free prepaid-label replacements, but others report long waits and refurbished units sent for new claims. Pro tip: buying from Costco or Amazon gives you a stronger return safety net.
Community
Largest community in the space — Reddit r/Ecoflow_community (~31K members), multiple Facebook groups, and an official community forum
App experience
Rated 4.6/5 iOS (~8,400 ratings) · 4.2/5 Android (~17,000 ratings)
Unique strength
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 — 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 — 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 — 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
Among the best capacity-to-price ratios available — 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 — 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 — no spare parts policy for some models. Some reports of erratic communication from support agents.
Analyst note
With the DELTA 2 retired, the EcoFlow column describes the company behind its replacement rather than a unit you can buy here. The BLUETTI column is the one that applies to a purchase today. Its biggest risk is support consistency, and buying direct is the remedy that also secures the AC70P's full warranty term.
Growth path
DELTA 2
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — 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.
AC70P
FIXED CAPACITYFixed at 864Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 500W of solar. Suitable for a 1-2 panel setup.
Adequate ports for most setups, but heavy users may want a power strip.
Realistic full solar rechargeat 70% of rated panel output — 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 AC70P: it is sealed at 864Wh, 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 AC70P.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 2
Long-term testing through outages, camping trips and daily home-office use credits the DELTA 2 with fast charging, dependable LiFePO4 cells and a real expansion pathA3. Reviewers consistently flag the fanA1A2. One review found it kicks in above 120W and runs continuously at around 48-55 dB near full loadA1, and charging at 1200W sounds like a gaming laptop unless you turn the charge rate down in the appA2. EcoFlow said a firmware fix for the fan was comingA4; we can't confirm it ever shipped.
“When charging at 1200W the fans sound like a gaming laptop, though you can lower the charging speed in the app to silence it.”
Sources
portablepowerlab.com
BLUETTI AC70P
Field data on the AC70P is thin. What our research holds is buyer's guides and spec comparisons rather than long-term ownersB1B3, and the one hands-on point is wall charging: 0-80% in roughly 0.8 hours, per a review and BLUETTI's own pageB2. The sources agree it's sealed at 864Wh with no expansion batteryB3. Nothing in the ledger speaks to fan noise either way, which is the gap a CPAP buyer should mind mostB1B2.
“Holds 864Wh — about 96Wh more than the AC70 — on safe, stable LiFePO4 chemistry built for thousands of charge cycles.”
Sources
bluettipower.com · bestgeneratorsolar.com · madetoexplore.ca · truegear.com.au
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 · 3 entries]
- AC70P's real advantages are more base capacity and faster wall charging; crucially it is sealed while the cheaper AC70 is the expandable model. [AC70P · 3 entries]
- A1
“Fans trigger at anything above 120 watts; at maximum load (1,500–1,800W) they run continuously at ~48–55 dB. Powering medical equipment above 120W in a bedroom means listening to the fans or running an extension cable out of the room.”
portablepowerlab.com — EcoFlow Delta 2 Review: 6 Months of Real Use; PCWorld — EcoFlow Delta 2 review · 2026 · [negative]
- A2
“When charging at 1200W the fans sound like a gaming laptop, though you can lower the charging speed in the app to silence it.”
PCWorld — EcoFlow Delta 2 power station review · 2026 · [mixed]
- A3
“After 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.”
portablepowerlab.com — EcoFlow Delta 2 Review: 6 Months of Real Use · 2026 · [positive]
- A4
“EcoFlow officials indicated they plan to address the fan noise in an upcoming firmware update, as they have for other models after release.”
portablepowerlab.com — EcoFlow Delta 2 Review · 2026 (dated claim — may be partially addressed) · [mixed]
- B1
“Holds 864Wh — about 96Wh more than the AC70 — on safe, stable LiFePO4 chemistry built for thousands of charge cycles.”
bluettipower.com / bestgeneratorsolar.com — AC70P buyer's guide · 2026 · [positive]
- B2
“Recharges faster from the wall — supports a higher AC input and reaches 0 to 80% in roughly 0.8 hours, acting as an efficient fast charger when you're in a hurry.”
bluettipower.com / madetoexplore.ca — AC70P review · 2026 · [positive]
- B3
“The AC70P does NOT support battery expansion — it is sealed at 864Wh. By contrast, the cheaper AC70 CAN expand to roughly 1,574Wh by adding BLUETTI's B80 expansion battery.”
truegear.com.au / bluettipower.com — AC70 vs AC70P comparison · 2026 · [mixed]
Research compiled October 11, 2026.
Who Should Buy Which
Buy the DELTA 2 if you…
- →You already own a DELTA 2: keep it. It holds more, outputs more and can add expansion batteries, so swapping it for the AC70P is a step down.
- →You wanted the DELTA 2's 1,800W output or its room to grow, bought new: that's EcoFlow's DELTA 3 now, its named replacement, not anything on this page.
Buy the AC70P if you…
- →You need a CPAP covered for two nights between charges and want the box that's still on the shelf.
- →Your outings run lights, phones, a 12V cooler and a speaker, nothing near 1,000W, and you'd rather carry 22.5 lb from the car than 27.
- →You want a fast wall top-up between trips; 0-80% in roughly 0.8 hours is the figure attached to itB2.
If neither fits
If you're sizing for a blackout day (1,645Wh in our model), a weekend off-grid (2,100Wh) or van life (4,685Wh a day), both fall well short. Close this tab and look at a station that holds more than 2,100Wh, ideally one that takes expansion batteries.
The Bottom Line
The DELTA 2 is the bigger box, and it's gone. Between these two, the AC70P is the only one you can buy new, and it does the light work well: two CPAP nights per charge, a tailgate with charge to spare, and every load peak we model with most of its 1,000W unused.
Check its two limits before you click: a 1,000W ceiling and 864Wh that never grows. If either one is a dealbreaker, EcoFlow's DELTA 3 is the DELTA 2's named replacement. If not, buy the AC70P from BLUETTI directly, register it, and go plug something in.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the EcoFlow DELTA 2 discontinued?
Yes. EcoFlow no longer sells it, and its store page forwards to the DELTA 3, EcoFlow's replacement. If you already own a DELTA 2, it still holds 1,024Wh and still accepts expansion batteries; you just can't buy one new from EcoFlow.
Is the BLUETTI AC70P a good alternative to the DELTA 2?
Yes, if your loads fit it. It holds 160Wh less, outputs 800W less continuously and can't expand, but every scenario we model peaks at 400W, well inside its 1,000W rating. If your combined load can top 1,000W or you plan to add batteries later, look at the DELTA 3 instead.
Can you add an expansion battery to the BLUETTI AC70P?
No. The AC70P is sealed at 864Wh, so the capacity you buy is the capacity you keep. Size it for your current load with some margin, and if you expect to outgrow it, choose an expandable station from the start.
How many nights will the BLUETTI AC70P run a CPAP?
Two, in our model. A CPAP at about 40W for eight hours uses 320Wh, and the AC70P has about 734Wh usable after our flat 85% factor on its 864Wh, so two nights (640Wh) fit with 94Wh spare and a third (960Wh) doesn't. Its noise rating is BLUETTI's own figure rather than a bench test, so try it at low load before it goes beside the bed.
Can the BLUETTI AC70P start a refrigerator?
Compare your fridge's startup draw against the AC70P's 2,000W surge ceiling. Its 2x surge-to-continuous ratio looks generous, but a compressor asks for watts at switch-on, not a multiple, and the DELTA 2's 2,700W ceiling was the higher of the two. If the fridge is the main reason you're buying, the 2,000W figure is the one to check.
Brand matchup
EcoFlow vs BLUETTI: measured across every matchup →Where to buy
EcoFlow DELTA 2
No longer sold
BLUETTI AC70PPick
$499.00
$499.00 · direct from BLUETTI
Last checked 28 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.